includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\EditPage\TextboxBuilder;
  24 use MediaWiki\EditPage\TextConflictHelper;
  25 use MediaWiki\Logger\LoggerFactory;
  26 use MediaWiki\MediaWikiServices;
  27 use Wikimedia\ScopedCallback;
  28
  29 /**
  30  * The edit page/HTML interface (split from Article)
  31  * The actual database and text munging is still in Article,
  32  * but it should get easier to call those from alternate
  33  * interfaces.
  34  *
  35  * EditPage cares about two distinct titles:
  36  * $this->mContextTitle is the page that forms submit to, links point to,
  37  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  38  * page in the database that is actually being edited. These are
  39  * usually the same, but they are now allowed to be different.
  40  *
  41  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  42  * headaches, which may be fatal.
  43  */
  44 class EditPage {
  45         /**
  46          * Used for Unicode support checks
  47          */
  48         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  49
  50         /**
  51          * Status: Article successfully updated
  52          */
  53         const AS_SUCCESS_UPDATE = 200;
  54
  55         /**
  56          * Status: Article successfully created
  57          */
  58         const AS_SUCCESS_NEW_ARTICLE = 201;
  59
  60         /**
  61          * Status: Article update aborted by a hook function
  62          */
  63         const AS_HOOK_ERROR = 210;
  64
  65         /**
  66          * Status: A hook function returned an error
  67          */
  68         const AS_HOOK_ERROR_EXPECTED = 212;
  69
  70         /**
  71          * Status: User is blocked from editing this page
  72          */
  73         const AS_BLOCKED_PAGE_FOR_USER = 215;
  74
  75         /**
  76          * Status: Content too big (> $wgMaxArticleSize)
  77          */
  78         const AS_CONTENT_TOO_BIG = 216;
  79
  80         /**
  81          * Status: this anonymous user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_ANON = 218;
  84
  85         /**
  86          * Status: this logged in user is not allowed to edit this page
  87          */
  88         const AS_READ_ONLY_PAGE_LOGGED = 219;
  89
  90         /**
  91          * Status: wiki is in readonly mode (wfReadOnly() == true)
  92          */
  93         const AS_READ_ONLY_PAGE = 220;
  94
  95         /**
  96          * Status: rate limiter for action 'edit' was tripped
  97          */
  98         const AS_RATE_LIMITED = 221;
  99
 100         /**
 101          * Status: article was deleted while editing and param wpRecreate == false or form
 102          * was not posted
 103          */
 104         const AS_ARTICLE_WAS_DELETED = 222;
 105
 106         /**
 107          * Status: user tried to create this page, but is not allowed to do that
 108          * ( Title->userCan('create') == false )
 109          */
 110         const AS_NO_CREATE_PERMISSION = 223;
 111
 112         /**
 113          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 114          */
 115         const AS_BLANK_ARTICLE = 224;
 116
 117         /**
 118          * Status: (non-resolvable) edit conflict
 119          */
 120         const AS_CONFLICT_DETECTED = 225;
 121
 122         /**
 123          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 124          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 125          */
 126         const AS_SUMMARY_NEEDED = 226;
 127
 128         /**
 129          * Status: user tried to create a new section without content
 130          */
 131         const AS_TEXTBOX_EMPTY = 228;
 132
 133         /**
 134          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 135          */
 136         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: user tried to modify the content model, but is not allowed to do that
 160          * ( User::isAllowed('editcontentmodel') == false )
 161          */
 162         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 163
 164         /**
 165          * Status: user tried to create self-redirect (redirect to the same article) and
 166          * wpIgnoreSelfRedirect == false
 167          */
 168         const AS_SELF_REDIRECT = 236;
 169
 170         /**
 171          * Status: an error relating to change tagging. Look at the message key for
 172          * more details
 173          */
 174         const AS_CHANGE_TAG_ERROR = 237;
 175
 176         /**
 177          * Status: can't parse content
 178          */
 179         const AS_PARSE_ERROR = 240;
 180
 181         /**
 182          * Status: when changing the content model is disallowed due to
 183          * $wgContentHandlerUseDB being false
 184          */
 185         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 186
 187         /**
 188          * Status: edit rejected because browser doesn't support Unicode.
 189          */
 190         const AS_UNICODE_NOT_SUPPORTED = 242;
 191
 192         /**
 193          * HTML id and name for the beginning of the edit form.
 194          */
 195         const EDITFORM_ID = 'editform';
 196
 197         /**
 198          * Prefix of key for cookie used to pass post-edit state.
 199          * The revision id edited is added after this
 200          */
 201         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 202
 203         /**
 204          * Duration of PostEdit cookie, in seconds.
 205          * The cookie will be removed instantly if the JavaScript runs.
 206          *
 207          * Otherwise, though, we don't want the cookies to accumulate.
 208          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 209          * limit of only 20 cookies per domain. This still applies at least to some
 210          * versions of IE without full updates:
 211          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 212          *
 213          * A value of 20 minutes should be enough to take into account slow loads and minor
 214          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 215          */
 216         const POST_EDIT_COOKIE_DURATION = 1200;
 217
 218         /**
 219          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 220          * @var Article
 221          */
 222         public $mArticle;
 223         /** @var WikiPage */
 224         private $page;
 225
 226         /**
 227          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 228          * @var Title
 229          */
 230         public $mTitle;
 231
 232         /** @var null|Title */
 233         private $mContextTitle = null;
 234
 235         /** @var string */
 236         public $action = 'submit';
 237
 238         /** @var bool */
 239         public $isConflict = false;
 240
 241         /** @var bool New page or new section */
 242         public $isNew = false;
 243
 244         /** @var bool */
 245         public $deletedSinceEdit;
 246
 247         /** @var string */
 248         public $formtype;
 249
 250         /** @var bool */
 251         public $firsttime;
 252
 253         /** @var bool|stdClass */
 254         public $lastDelete;
 255
 256         /** @var bool */
 257         public $mTokenOk = false;
 258
 259         /** @var bool */
 260         public $mTokenOkExceptSuffix = false;
 261
 262         /** @var bool */
 263         public $mTriedSave = false;
 264
 265         /** @var bool */
 266         public $incompleteForm = false;
 267
 268         /** @var bool */
 269         public $tooBig = false;
 270
 271         /** @var bool */
 272         public $missingComment = false;
 273
 274         /** @var bool */
 275         public $missingSummary = false;
 276
 277         /** @var bool */
 278         public $allowBlankSummary = false;
 279
 280         /** @var bool */
 281         protected $blankArticle = false;
 282
 283         /** @var bool */
 284         protected $allowBlankArticle = false;
 285
 286         /** @var bool */
 287         protected $selfRedirect = false;
 288
 289         /** @var bool */
 290         protected $allowSelfRedirect = false;
 291
 292         /** @var string */
 293         public $autoSumm = '';
 294
 295         /** @var string */
 296         public $hookError = '';
 297
 298         /** @var ParserOutput */
 299         public $mParserOutput;
 300
 301         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 302         public $hasPresetSummary = false;
 303
 304         /** @var Revision|bool|null */
 305         public $mBaseRevision = false;
 306
 307         /** @var bool */
 308         public $mShowSummaryField = true;
 309
 310         # Form values
 311
 312         /** @var bool */
 313         public $save = false;
 314
 315         /** @var bool */
 316         public $preview = false;
 317
 318         /** @var bool */
 319         public $diff = false;
 320
 321         /** @var bool */
 322         public $minoredit = false;
 323
 324         /** @var bool */
 325         public $watchthis = false;
 326
 327         /** @var bool */
 328         public $recreate = false;
 329
 330         /** @var string */
 331         public $textbox1 = '';
 332
 333         /** @var string */
 334         public $textbox2 = '';
 335
 336         /** @var string */
 337         public $summary = '';
 338
 339         /** @var bool */
 340         public $nosummary = false;
 341
 342         /** @var string */
 343         public $edittime = '';
 344
 345         /** @var int */
 346         private $editRevId = null;
 347
 348         /** @var string */
 349         public $section = '';
 350
 351         /** @var string */
 352         public $sectiontitle = '';
 353
 354         /** @var string */
 355         public $starttime = '';
 356
 357         /** @var int */
 358         public $oldid = 0;
 359
 360         /** @var int */
 361         public $parentRevId = 0;
 362
 363         /** @var string */
 364         public $editintro = '';
 365
 366         /** @var null */
 367         public $scrolltop = null;
 368
 369         /** @var bool */
 370         public $bot = true;
 371
 372         /** @var string */
 373         public $contentModel;
 374
 375         /** @var null|string */
 376         public $contentFormat = null;
 377
 378         /** @var null|array */
 379         private $changeTags = null;
 380
 381         # Placeholders for text injection by hooks (must be HTML)
 382         # extensions should take care to _append_ to the present value
 383
 384         /** @var string Before even the preview */
 385         public $editFormPageTop = '';
 386         public $editFormTextTop = '';
 387         public $editFormTextBeforeContent = '';
 388         public $editFormTextAfterWarn = '';
 389         public $editFormTextAfterTools = '';
 390         public $editFormTextBottom = '';
 391         public $editFormTextAfterContent = '';
 392         public $previewTextAfterContent = '';
 393         public $mPreloadContent = null;
 394
 395         /* $didSave should be set to true whenever an article was successfully altered. */
 396         public $didSave = false;
 397         public $undidRev = 0;
 398
 399         public $suppressIntro = false;
 400
 401         /** @var bool */
 402         protected $edit;
 403
 404         /** @var bool|int */
 405         protected $contentLength = false;
 406
 407         /**
 408          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 409          */
 410         private $enableApiEditOverride = false;
 411
 412         /**
 413          * @var IContextSource
 414          */
 415         protected $context;
 416
 417         /**
 418          * @var bool Whether an old revision is edited
 419          */
 420         private $isOldRev = false;
 421
 422         /**
 423          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 424          */
 425         private $unicodeCheck;
 426
 427         /**
 428          * Factory function to create an edit conflict helper
 429          *
 430          * @var callable
 431          */
 432         private $editConflictHelperFactory;
 433
 434         /**
 435          * @var TextConflictHelper|null
 436          */
 437         private $editConflictHelper;
 438
 439         /**
 440          * @param Article $article
 441          */
 442         public function __construct( Article $article ) {
 443                 $this->mArticle = $article;
 444                 $this->page = $article->getPage(); // model object
 445                 $this->mTitle = $article->getTitle();
 446                 $this->context = $article->getContext();
 447
 448                 $this->contentModel = $this->mTitle->getContentModel();
 449
 450                 $handler = ContentHandler::getForModelID( $this->contentModel );
 451                 $this->contentFormat = $handler->getDefaultFormat();
 452                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 453         }
 454
 455         /**
 456          * @return Article
 457          */
 458         public function getArticle() {
 459                 return $this->mArticle;
 460         }
 461
 462         /**
 463          * @since 1.28
 464          * @return IContextSource
 465          */
 466         public function getContext() {
 467                 return $this->context;
 468         }
 469
 470         /**
 471          * @since 1.19
 472          * @return Title
 473          */
 474         public function getTitle() {
 475                 return $this->mTitle;
 476         }
 477
 478         /**
 479          * Set the context Title object
 480          *
 481          * @param Title|null $title Title object or null
 482          */
 483         public function setContextTitle( $title ) {
 484                 $this->mContextTitle = $title;
 485         }
 486
 487         /**
 488          * Get the context title object.
 489          *
 490          * If not set, $wgTitle will be returned, but this is deprecated. This will
 491          * throw an exception.
 492          *
 493          * @return Title
 494          */
 495         public function getContextTitle() {
 496                 if ( is_null( $this->mContextTitle ) ) {
 497                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 498                         global $wgTitle;
 499                         return $wgTitle;
 500                 } else {
 501                         return $this->mContextTitle;
 502                 }
 503         }
 504
 505         /**
 506          * Returns if the given content model is editable.
 507          *
 508          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 509          * @return bool
 510          * @throws MWException If $modelId has no known handler
 511          */
 512         public function isSupportedContentModel( $modelId ) {
 513                 return $this->enableApiEditOverride === true ||
 514                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 515         }
 516
 517         /**
 518          * Allow editing of content that supports API direct editing, but not general
 519          * direct editing. Set to false by default.
 520          *
 521          * @param bool $enableOverride
 522          */
 523         public function setApiEditOverride( $enableOverride ) {
 524                 $this->enableApiEditOverride = $enableOverride;
 525         }
 526
 527         /**
 528          * @deprecated since 1.29, call edit directly
 529          */
 530         public function submit() {
 531                 wfDeprecated( __METHOD__, '1.29' );
 532                 $this->edit();
 533         }
 534
 535         /**
 536          * This is the function that gets called for "action=edit". It
 537          * sets up various member variables, then passes execution to
 538          * another function, usually showEditForm()
 539          *
 540          * The edit form is self-submitting, so that when things like
 541          * preview and edit conflicts occur, we get the same form back
 542          * with the extra stuff added.  Only when the final submission
 543          * is made and all is well do we actually save and redirect to
 544          * the newly-edited page.
 545          */
 546         public function edit() {
 547                 // Allow extensions to modify/prevent this form or submission
 548                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 549                         return;
 550                 }
 551
 552                 wfDebug( __METHOD__ . ": enter\n" );
 553
 554                 $request = $this->context->getRequest();
 555                 // If they used redlink=1 and the page exists, redirect to the main article
 556                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 557                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 558                         return;
 559                 }
 560
 561                 $this->importFormData( $request );
 562                 $this->firsttime = false;
 563
 564                 if ( wfReadOnly() && $this->save ) {
 565                         // Force preview
 566                         $this->save = false;
 567                         $this->preview = true;
 568                 }
 569
 570                 if ( $this->save ) {
 571                         $this->formtype = 'save';
 572                 } elseif ( $this->preview ) {
 573                         $this->formtype = 'preview';
 574                 } elseif ( $this->diff ) {
 575                         $this->formtype = 'diff';
 576                 } else { # First time through
 577                         $this->firsttime = true;
 578                         if ( $this->previewOnOpen() ) {
 579                                 $this->formtype = 'preview';
 580                         } else {
 581                                 $this->formtype = 'initial';
 582                         }
 583                 }
 584
 585                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 586                 if ( $permErrors ) {
 587                         wfDebug( __METHOD__ . ": User can't edit\n" );
 588
 589                         // track block with a cookie if it doesn't exists already
 590                         $this->context->getUser()->trackBlockWithCookie();
 591
 592                         // Auto-block user's IP if the account was "hard" blocked
 593                         if ( !wfReadOnly() ) {
 594                                 DeferredUpdates::addCallableUpdate( function () {
 595                                         $this->context->getUser()->spreadAnyEditBlock();
 596                                 } );
 597                         }
 598                         $this->displayPermissionsError( $permErrors );
 599
 600                         return;
 601                 }
 602
 603                 $revision = $this->mArticle->getRevisionFetched();
 604                 // Disallow editing revisions with content models different from the current one
 605                 // Undo edits being an exception in order to allow reverting content model changes.
 606                 if ( $revision
 607                         && $revision->getContentModel() !== $this->contentModel
 608                 ) {
 609                         $prevRev = null;
 610                         if ( $this->undidRev ) {
 611                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 612                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 613                         }
 614                         if ( !$this->undidRev
 615                                 || !$prevRev
 616                                 || $prevRev->getContentModel() !== $this->contentModel
 617                         ) {
 618                                 $this->displayViewSourcePage(
 619                                         $this->getContentObject(),
 620                                         $this->context->msg(
 621                                                 'contentmodelediterror',
 622                                                 $revision->getContentModel(),
 623                                                 $this->contentModel
 624                                         )->plain()
 625                                 );
 626                                 return;
 627                         }
 628                 }
 629
 630                 $this->isConflict = false;
 631
 632                 # Show applicable editing introductions
 633                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 634                         $this->showIntro();
 635                 }
 636
 637                 # Attempt submission here.  This will check for edit conflicts,
 638                 # and redundantly check for locked database, blocked IPs, etc.
 639                 # that edit() already checked just in case someone tries to sneak
 640                 # in the back door with a hand-edited submission URL.
 641
 642                 if ( 'save' == $this->formtype ) {
 643                         $resultDetails = null;
 644                         $status = $this->attemptSave( $resultDetails );
 645                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 646                                 return;
 647                         }
 648                 }
 649
 650                 # First time through: get contents, set time for conflict
 651                 # checking, etc.
 652                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 653                         if ( $this->initialiseForm() === false ) {
 654                                 $this->noSuchSectionPage();
 655                                 return;
 656                         }
 657
 658                         if ( !$this->mTitle->getArticleID() ) {
 659                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 660                         } else {
 661                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 662                         }
 663
 664                 }
 665
 666                 $this->showEditForm();
 667         }
 668
 669         /**
 670          * @param string $rigor Same format as Title::getUserPermissionErrors()
 671          * @return array
 672          */
 673         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 674                 $user = $this->context->getUser();
 675                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 676                 # Can this title be created?
 677                 if ( !$this->mTitle->exists() ) {
 678                         $permErrors = array_merge(
 679                                 $permErrors,
 680                                 wfArrayDiff2(
 681                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 682                                         $permErrors
 683                                 )
 684                         );
 685                 }
 686                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 687                 $remove = [];
 688                 foreach ( $permErrors as $error ) {
 689                         if ( ( $this->preview || $this->diff )
 690                                 && (
 691                                         $error[0] == 'blockedtext' ||
 692                                         $error[0] == 'autoblockedtext' ||
 693                                         $error[0] == 'systemblockedtext'
 694                                 )
 695                         ) {
 696                                 $remove[] = $error;
 697                         }
 698                 }
 699                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 700
 701                 return $permErrors;
 702         }
 703
 704         /**
 705          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 706          * but with the following differences:
 707          * - If redlink=1, the user will be redirected to the page
 708          * - If there is content to display or the error occurs while either saving,
 709          *   previewing or showing the difference, it will be a
 710          *   "View source for ..." page displaying the source code after the error message.
 711          *
 712          * @since 1.19
 713          * @param array $permErrors Array of permissions errors, as returned by
 714          *    Title::getUserPermissionsErrors().
 715          * @throws PermissionsError
 716          */
 717         protected function displayPermissionsError( array $permErrors ) {
 718                 $out = $this->context->getOutput();
 719                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 720                         // The edit page was reached via a red link.
 721                         // Redirect to the article page and let them click the edit tab if
 722                         // they really want a permission error.
 723                         $out->redirect( $this->mTitle->getFullURL() );
 724                         return;
 725                 }
 726
 727                 $content = $this->getContentObject();
 728
 729                 # Use the normal message if there's nothing to display
 730                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 731                         $action = $this->mTitle->exists() ? 'edit' :
 732                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 733                         throw new PermissionsError( $action, $permErrors );
 734                 }
 735
 736                 $this->displayViewSourcePage(
 737                         $content,
 738                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 739                 );
 740         }
 741
 742         /**
 743          * Display a read-only View Source page
 744          * @param Content $content
 745          * @param string $errorMessage additional wikitext error message to display
 746          */
 747         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 748                 $out = $this->context->getOutput();
 749                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 750
 751                 $out->setRobotPolicy( 'noindex,nofollow' );
 752                 $out->setPageTitle( $this->context->msg(
 753                         'viewsource-title',
 754                         $this->getContextTitle()->getPrefixedText()
 755                 ) );
 756                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 757                 $out->addHTML( $this->editFormPageTop );
 758                 $out->addHTML( $this->editFormTextTop );
 759
 760                 if ( $errorMessage !== '' ) {
 761                         $out->addWikiText( $errorMessage );
 762                         $out->addHTML( "<hr />\n" );
 763                 }
 764
 765                 # If the user made changes, preserve them when showing the markup
 766                 # (This happens when a user is blocked during edit, for instance)
 767                 if ( !$this->firsttime ) {
 768                         $text = $this->textbox1;
 769                         $out->addWikiMsg( 'viewyourtext' );
 770                 } else {
 771                         try {
 772                                 $text = $this->toEditText( $content );
 773                         } catch ( MWException $e ) {
 774                                 # Serialize using the default format if the content model is not supported
 775                                 # (e.g. for an old revision with a different model)
 776                                 $text = $content->serialize();
 777                         }
 778                         $out->addWikiMsg( 'viewsourcetext' );
 779                 }
 780
 781                 $out->addHTML( $this->editFormTextBeforeContent );
 782                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 783                 $out->addHTML( $this->editFormTextAfterContent );
 784
 785                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 786
 787                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 788
 789                 $out->addHTML( $this->editFormTextBottom );
 790                 if ( $this->mTitle->exists() ) {
 791                         $out->returnToMain( null, $this->mTitle );
 792                 }
 793         }
 794
 795         /**
 796          * Should we show a preview when the edit form is first shown?
 797          *
 798          * @return bool
 799          */
 800         protected function previewOnOpen() {
 801                 $config = $this->context->getConfig();
 802                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 803                 $request = $this->context->getRequest();
 804                 if ( $config->get( 'RawHtml' ) ) {
 805                         // If raw HTML is enabled, disable preview on open
 806                         // since it has to be posted with a token for
 807                         // security reasons
 808                         return false;
 809                 }
 810                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 811                         // Explicit override from request
 812                         return true;
 813                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 814                         // Explicit override from request
 815                         return false;
 816                 } elseif ( $this->section == 'new' ) {
 817                         // Nothing *to* preview for new sections
 818                         return false;
 819                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 820                         && $this->context->getUser()->getOption( 'previewonfirst' )
 821                 ) {
 822                         // Standard preference behavior
 823                         return true;
 824                 } elseif ( !$this->mTitle->exists()
 825                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 826                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 827                 ) {
 828                         // Categories are special
 829                         return true;
 830                 } else {
 831                         return false;
 832                 }
 833         }
 834
 835         /**
 836          * Checks whether the user entered a skin name in uppercase,
 837          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 838          *
 839          * @return bool
 840          */
 841         protected function isWrongCaseUserConfigPage() {
 842                 if ( $this->mTitle->isUserConfigPage() ) {
 843                         $name = $this->mTitle->getSkinFromConfigSubpage();
 844                         $skins = array_merge(
 845                                 array_keys( Skin::getSkinNames() ),
 846                                 [ 'common' ]
 847                         );
 848                         return !in_array( $name, $skins )
 849                                 && in_array( strtolower( $name ), $skins );
 850                 } else {
 851                         return false;
 852                 }
 853         }
 854
 855         /**
 856          * Returns whether section editing is supported for the current page.
 857          * Subclasses may override this to replace the default behavior, which is
 858          * to check ContentHandler::supportsSections.
 859          *
 860          * @return bool True if this edit page supports sections, false otherwise.
 861          */
 862         protected function isSectionEditSupported() {
 863                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 864                 return $contentHandler->supportsSections();
 865         }
 866
 867         /**
 868          * This function collects the form data and uses it to populate various member variables.
 869          * @param WebRequest &$request
 870          * @throws ErrorPageError
 871          */
 872         public function importFormData( &$request ) {
 873                 # Section edit can come from either the form or a link
 874                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 875
 876                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 877                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 878                 }
 879
 880                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 881
 882                 if ( $request->wasPosted() ) {
 883                         # These fields need to be checked for encoding.
 884                         # Also remove trailing whitespace, but don't remove _initial_
 885                         # whitespace from the text boxes. This may be significant formatting.
 886                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 887                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 888                                 // Skip this if wpTextbox2 has input, it indicates that we came
 889                                 // from a conflict page with raw page text, not a custom form
 890                                 // modified by subclasses
 891                                 $textbox1 = $this->importContentFormData( $request );
 892                                 if ( $textbox1 !== null ) {
 893                                         $this->textbox1 = $textbox1;
 894                                 }
 895                         }
 896
 897                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 898
 899                         $this->summary = $request->getText( 'wpSummary' );
 900
 901                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 902                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 903                         # section titles.
 904                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 905
 906                         # Treat sectiontitle the same way as summary.
 907                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 908                         # currently doing double duty as both edit summary and section title. Right now this
 909                         # is just to allow API edits to work around this limitation, but this should be
 910                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 911                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 912                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 913
 914                         $this->edittime = $request->getVal( 'wpEdittime' );
 915                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 916                         $this->starttime = $request->getVal( 'wpStarttime' );
 917
 918                         $undidRev = $request->getInt( 'wpUndidRevision' );
 919                         if ( $undidRev ) {
 920                                 $this->undidRev = $undidRev;
 921                         }
 922
 923                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 924
 925                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 926                                 // wpTextbox1 field is missing, possibly due to being "too big"
 927                                 // according to some filter rules such as Suhosin's setting for
 928                                 // suhosin.request.max_value_length (d'oh)
 929                                 $this->incompleteForm = true;
 930                         } else {
 931                                 // If we receive the last parameter of the request, we can fairly
 932                                 // claim the POST request has not been truncated.
 933
 934                                 // TODO: softened the check for cutover.  Once we determine
 935                                 // that it is safe, we should complete the transition by
 936                                 // removing the "edittime" clause.
 937                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 938                                         && is_null( $this->edittime ) );
 939                         }
 940                         if ( $this->incompleteForm ) {
 941                                 # If the form is incomplete, force to preview.
 942                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 943                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 944                                 $this->preview = true;
 945                         } else {
 946                                 $this->preview = $request->getCheck( 'wpPreview' );
 947                                 $this->diff = $request->getCheck( 'wpDiff' );
 948
 949                                 // Remember whether a save was requested, so we can indicate
 950                                 // if we forced preview due to session failure.
 951                                 $this->mTriedSave = !$this->preview;
 952
 953                                 if ( $this->tokenOk( $request ) ) {
 954                                         # Some browsers will not report any submit button
 955                                         # if the user hits enter in the comment box.
 956                                         # The unmarked state will be assumed to be a save,
 957                                         # if the form seems otherwise complete.
 958                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 959                                 } elseif ( $this->diff ) {
 960                                         # Failed token check, but only requested "Show Changes".
 961                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 962                                 } else {
 963                                         # Page might be a hack attempt posted from
 964                                         # an external site. Preview instead of saving.
 965                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 966                                         $this->preview = true;
 967                                 }
 968                         }
 969                         $this->save = !$this->preview && !$this->diff;
 970                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 971                                 $this->edittime = null;
 972                         }
 973
 974                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 975                                 $this->starttime = null;
 976                         }
 977
 978                         $this->recreate = $request->getCheck( 'wpRecreate' );
 979
 980                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 981                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 982
 983                         $user = $this->context->getUser();
 984                         # Don't force edit summaries when a user is editing their own user or talk page
 985                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 986                                 && $this->mTitle->getText() == $user->getName()
 987                         ) {
 988                                 $this->allowBlankSummary = true;
 989                         } else {
 990                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 991                                         || !$user->getOption( 'forceeditsummary' );
 992                         }
 993
 994                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 995
 996                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 997                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 998
 999                         $changeTags = $request->getVal( 'wpChangeTags' );
1000                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1001                                 $this->changeTags = [];
1002                         } else {
1003                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1004                                         $changeTags ) ) );
1005                         }
1006                 } else {
1007                         # Not a posted form? Start with nothing.
1008                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1009                         $this->textbox1 = '';
1010                         $this->summary = '';
1011                         $this->sectiontitle = '';
1012                         $this->edittime = '';
1013                         $this->editRevId = null;
1014                         $this->starttime = wfTimestampNow();
1015                         $this->edit = false;
1016                         $this->preview = false;
1017                         $this->save = false;
1018                         $this->diff = false;
1019                         $this->minoredit = false;
1020                         // Watch may be overridden by request parameters
1021                         $this->watchthis = $request->getBool( 'watchthis', false );
1022                         $this->recreate = false;
1023
1024                         // When creating a new section, we can preload a section title by passing it as the
1025                         // preloadtitle parameter in the URL (T15100)
1026                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1027                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1028                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1029                                 $this->summary = $request->getVal( 'preloadtitle' );
1030                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1031                                 $this->summary = $request->getText( 'summary' );
1032                                 if ( $this->summary !== '' ) {
1033                                         $this->hasPresetSummary = true;
1034                                 }
1035                         }
1036
1037                         if ( $request->getVal( 'minor' ) ) {
1038                                 $this->minoredit = true;
1039                         }
1040                 }
1041
1042                 $this->oldid = $request->getInt( 'oldid' );
1043                 $this->parentRevId = $request->getInt( 'parentRevId' );
1044
1045                 $this->bot = $request->getBool( 'bot', true );
1046                 $this->nosummary = $request->getBool( 'nosummary' );
1047
1048                 // May be overridden by revision.
1049                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1050                 // May be overridden by revision.
1051                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1052
1053                 try {
1054                         $handler = ContentHandler::getForModelID( $this->contentModel );
1055                 } catch ( MWUnknownContentModelException $e ) {
1056                         throw new ErrorPageError(
1057                                 'editpage-invalidcontentmodel-title',
1058                                 'editpage-invalidcontentmodel-text',
1059                                 [ wfEscapeWikiText( $this->contentModel ) ]
1060                         );
1061                 }
1062
1063                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1064                         throw new ErrorPageError(
1065                                 'editpage-notsupportedcontentformat-title',
1066                                 'editpage-notsupportedcontentformat-text',
1067                                 [
1068                                         wfEscapeWikiText( $this->contentFormat ),
1069                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1070                                 ]
1071                         );
1072                 }
1073
1074                 /**
1075                  * @todo Check if the desired model is allowed in this namespace, and if
1076                  *   a transition from the page's current model to the new model is
1077                  *   allowed.
1078                  */
1079
1080                 $this->editintro = $request->getText( 'editintro',
1081                         // Custom edit intro for new sections
1082                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1083
1084                 // Allow extensions to modify form data
1085                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1086         }
1087
1088         /**
1089          * Subpage overridable method for extracting the page content data from the
1090          * posted form to be placed in $this->textbox1, if using customized input
1091          * this method should be overridden and return the page text that will be used
1092          * for saving, preview parsing and so on...
1093          *
1094          * @param WebRequest &$request
1095          * @return string|null
1096          */
1097         protected function importContentFormData( &$request ) {
1098                 return; // Don't do anything, EditPage already extracted wpTextbox1
1099         }
1100
1101         /**
1102          * Initialise form fields in the object
1103          * Called on the first invocation, e.g. when a user clicks an edit link
1104          * @return bool If the requested section is valid
1105          */
1106         public function initialiseForm() {
1107                 $this->edittime = $this->page->getTimestamp();
1108                 $this->editRevId = $this->page->getLatest();
1109
1110                 $content = $this->getContentObject( false ); # TODO: track content object?!
1111                 if ( $content === false ) {
1112                         return false;
1113                 }
1114                 $this->textbox1 = $this->toEditText( $content );
1115
1116                 $user = $this->context->getUser();
1117                 // activate checkboxes if user wants them to be always active
1118                 # Sort out the "watch" checkbox
1119                 if ( $user->getOption( 'watchdefault' ) ) {
1120                         # Watch all edits
1121                         $this->watchthis = true;
1122                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1123                         # Watch creations
1124                         $this->watchthis = true;
1125                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1126                         # Already watched
1127                         $this->watchthis = true;
1128                 }
1129                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1130                         $this->minoredit = true;
1131                 }
1132                 if ( $this->textbox1 === false ) {
1133                         return false;
1134                 }
1135                 return true;
1136         }
1137
1138         /**
1139          * @param Content|null $def_content The default value to return
1140          *
1141          * @return Content|null Content on success, $def_content for invalid sections
1142          *
1143          * @since 1.21
1144          */
1145         protected function getContentObject( $def_content = null ) {
1146                 global $wgContLang;
1147
1148                 $content = false;
1149
1150                 $user = $this->context->getUser();
1151                 $request = $this->context->getRequest();
1152                 // For message page not locally set, use the i18n message.
1153                 // For other non-existent articles, use preload text if any.
1154                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1155                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1156                                 # If this is a system message, get the default text.
1157                                 $msg = $this->mTitle->getDefaultMessageText();
1158
1159                                 $content = $this->toEditContent( $msg );
1160                         }
1161                         if ( $content === false ) {
1162                                 # If requested, preload some text.
1163                                 $preload = $request->getVal( 'preload',
1164                                         // Custom preload text for new sections
1165                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1166                                 $params = $request->getArray( 'preloadparams', [] );
1167
1168                                 $content = $this->getPreloadedContent( $preload, $params );
1169                         }
1170                 // For existing pages, get text based on "undo" or section parameters.
1171                 } else {
1172                         if ( $this->section != '' ) {
1173                                 // Get section edit text (returns $def_text for invalid sections)
1174                                 $orig = $this->getOriginalContent( $user );
1175                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1176
1177                                 if ( !$content ) {
1178                                         $content = $def_content;
1179                                 }
1180                         } else {
1181                                 $undoafter = $request->getInt( 'undoafter' );
1182                                 $undo = $request->getInt( 'undo' );
1183
1184                                 if ( $undo > 0 && $undoafter > 0 ) {
1185                                         $undorev = Revision::newFromId( $undo );
1186                                         $oldrev = Revision::newFromId( $undoafter );
1187
1188                                         # Sanity check, make sure it's the right page,
1189                                         # the revisions exist and they were not deleted.
1190                                         # Otherwise, $content will be left as-is.
1191                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1192                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1193                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1194                                         ) {
1195                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1196
1197                                                 if ( $content === false ) {
1198                                                         # Warn the user that something went wrong
1199                                                         $undoMsg = 'failure';
1200                                                 } else {
1201                                                         $oldContent = $this->page->getContent( Revision::RAW );
1202                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1203                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1204                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1205                                                                 // The undo may change content
1206                                                                 // model if its reverting the top
1207                                                                 // edit. This can result in
1208                                                                 // mismatched content model/format.
1209                                                                 $this->contentModel = $newContent->getModel();
1210                                                                 $this->contentFormat = $oldrev->getContentFormat();
1211                                                         }
1212
1213                                                         if ( $newContent->equals( $oldContent ) ) {
1214                                                                 # Tell the user that the undo results in no change,
1215                                                                 # i.e. the revisions were already undone.
1216                                                                 $undoMsg = 'nochange';
1217                                                                 $content = false;
1218                                                         } else {
1219                                                                 # Inform the user of our success and set an automatic edit summary
1220                                                                 $undoMsg = 'success';
1221
1222                                                                 # If we just undid one rev, use an autosummary
1223                                                                 $firstrev = $oldrev->getNext();
1224                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1225                                                                         $userText = $undorev->getUserText();
1226                                                                         if ( $userText === '' ) {
1227                                                                                 $undoSummary = $this->context->msg(
1228                                                                                         'undo-summary-username-hidden',
1229                                                                                         $undo
1230                                                                                 )->inContentLanguage()->text();
1231                                                                         } else {
1232                                                                                 $undoSummary = $this->context->msg(
1233                                                                                         'undo-summary',
1234                                                                                         $undo,
1235                                                                                         $userText
1236                                                                                 )->inContentLanguage()->text();
1237                                                                         }
1238                                                                         if ( $this->summary === '' ) {
1239                                                                                 $this->summary = $undoSummary;
1240                                                                         } else {
1241                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1242                                                                                         ->inContentLanguage()->text() . $this->summary;
1243                                                                         }
1244                                                                         $this->undidRev = $undo;
1245                                                                 }
1246                                                                 $this->formtype = 'diff';
1247                                                         }
1248                                                 }
1249                                         } else {
1250                                                 // Failed basic sanity checks.
1251                                                 // Older revisions may have been removed since the link
1252                                                 // was created, or we may simply have got bogus input.
1253                                                 $undoMsg = 'norev';
1254                                         }
1255
1256                                         $out = $this->context->getOutput();
1257                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1258                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1259                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1260                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1261                                 }
1262
1263                                 if ( $content === false ) {
1264                                         $content = $this->getOriginalContent( $user );
1265                                 }
1266                         }
1267                 }
1268
1269                 return $content;
1270         }
1271
1272         /**
1273          * Get the content of the wanted revision, without section extraction.
1274          *
1275          * The result of this function can be used to compare user's input with
1276          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1277          * to the original text of the edit.
1278          *
1279          * This differs from Article::getContent() that when a missing revision is
1280          * encountered the result will be null and not the
1281          * 'missing-revision' message.
1282          *
1283          * @since 1.19
1284          * @param User $user The user to get the revision for
1285          * @return Content|null
1286          */
1287         private function getOriginalContent( User $user ) {
1288                 if ( $this->section == 'new' ) {
1289                         return $this->getCurrentContent();
1290                 }
1291                 $revision = $this->mArticle->getRevisionFetched();
1292                 if ( $revision === null ) {
1293                         $handler = ContentHandler::getForModelID( $this->contentModel );
1294                         return $handler->makeEmptyContent();
1295                 }
1296                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1297                 return $content;
1298         }
1299
1300         /**
1301          * Get the edit's parent revision ID
1302          *
1303          * The "parent" revision is the ancestor that should be recorded in this
1304          * page's revision history.  It is either the revision ID of the in-memory
1305          * article content, or in the case of a 3-way merge in order to rebase
1306          * across a recoverable edit conflict, the ID of the newer revision to
1307          * which we have rebased this page.
1308          *
1309          * @since 1.27
1310          * @return int Revision ID
1311          */
1312         public function getParentRevId() {
1313                 if ( $this->parentRevId ) {
1314                         return $this->parentRevId;
1315                 } else {
1316                         return $this->mArticle->getRevIdFetched();
1317                 }
1318         }
1319
1320         /**
1321          * Get the current content of the page. This is basically similar to
1322          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1323          * content object is returned instead of null.
1324          *
1325          * @since 1.21
1326          * @return Content
1327          */
1328         protected function getCurrentContent() {
1329                 $rev = $this->page->getRevision();
1330                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1331
1332                 if ( $content === false || $content === null ) {
1333                         $handler = ContentHandler::getForModelID( $this->contentModel );
1334                         return $handler->makeEmptyContent();
1335                 } elseif ( !$this->undidRev ) {
1336                         // Content models should always be the same since we error
1337                         // out if they are different before this point (in ->edit()).
1338                         // The exception being, during an undo, the current revision might
1339                         // differ from the prior revision.
1340                         $logger = LoggerFactory::getInstance( 'editpage' );
1341                         if ( $this->contentModel !== $rev->getContentModel() ) {
1342                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1343                                         'prev' => $this->contentModel,
1344                                         'new' => $rev->getContentModel(),
1345                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1346                                         'method' => __METHOD__
1347                                 ] );
1348                                 $this->contentModel = $rev->getContentModel();
1349                         }
1350
1351                         // Given that the content models should match, the current selected
1352                         // format should be supported.
1353                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1354                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1355
1356                                         'prev' => $this->contentFormat,
1357                                         'new' => $rev->getContentFormat(),
1358                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1359                                         'method' => __METHOD__
1360                                 ] );
1361                                 $this->contentFormat = $rev->getContentFormat();
1362                         }
1363                 }
1364                 return $content;
1365         }
1366
1367         /**
1368          * Use this method before edit() to preload some content into the edit box
1369          *
1370          * @param Content $content
1371          *
1372          * @since 1.21
1373          */
1374         public function setPreloadedContent( Content $content ) {
1375                 $this->mPreloadContent = $content;
1376         }
1377
1378         /**
1379          * Get the contents to be preloaded into the box, either set by
1380          * an earlier setPreloadText() or by loading the given page.
1381          *
1382          * @param string $preload Representing the title to preload from.
1383          * @param array $params Parameters to use (interface-message style) in the preloaded text
1384          *
1385          * @return Content
1386          *
1387          * @since 1.21
1388          */
1389         protected function getPreloadedContent( $preload, $params = [] ) {
1390                 if ( !empty( $this->mPreloadContent ) ) {
1391                         return $this->mPreloadContent;
1392                 }
1393
1394                 $handler = ContentHandler::getForModelID( $this->contentModel );
1395
1396                 if ( $preload === '' ) {
1397                         return $handler->makeEmptyContent();
1398                 }
1399
1400                 $user = $this->context->getUser();
1401                 $title = Title::newFromText( $preload );
1402                 # Check for existence to avoid getting MediaWiki:Noarticletext
1403                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1404                         // TODO: somehow show a warning to the user!
1405                         return $handler->makeEmptyContent();
1406                 }
1407
1408                 $page = WikiPage::factory( $title );
1409                 if ( $page->isRedirect() ) {
1410                         $title = $page->getRedirectTarget();
1411                         # Same as before
1412                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1413                                 // TODO: somehow show a warning to the user!
1414                                 return $handler->makeEmptyContent();
1415                         }
1416                         $page = WikiPage::factory( $title );
1417                 }
1418
1419                 $parserOptions = ParserOptions::newFromUser( $user );
1420                 $content = $page->getContent( Revision::RAW );
1421
1422                 if ( !$content ) {
1423                         // TODO: somehow show a warning to the user!
1424                         return $handler->makeEmptyContent();
1425                 }
1426
1427                 if ( $content->getModel() !== $handler->getModelID() ) {
1428                         $converted = $content->convert( $handler->getModelID() );
1429
1430                         if ( !$converted ) {
1431                                 // TODO: somehow show a warning to the user!
1432                                 wfDebug( "Attempt to preload incompatible content: " .
1433                                         "can't convert " . $content->getModel() .
1434                                         " to " . $handler->getModelID() );
1435
1436                                 return $handler->makeEmptyContent();
1437                         }
1438
1439                         $content = $converted;
1440                 }
1441
1442                 return $content->preloadTransform( $title, $parserOptions, $params );
1443         }
1444
1445         /**
1446          * Make sure the form isn't faking a user's credentials.
1447          *
1448          * @param WebRequest &$request
1449          * @return bool
1450          * @private
1451          */
1452         public function tokenOk( &$request ) {
1453                 $token = $request->getVal( 'wpEditToken' );
1454                 $user = $this->context->getUser();
1455                 $this->mTokenOk = $user->matchEditToken( $token );
1456                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1457                 return $this->mTokenOk;
1458         }
1459
1460         /**
1461          * Sets post-edit cookie indicating the user just saved a particular revision.
1462          *
1463          * This uses a temporary cookie for each revision ID so separate saves will never
1464          * interfere with each other.
1465          *
1466          * Article::view deletes the cookie on server-side after the redirect and
1467          * converts the value to the global JavaScript variable wgPostEdit.
1468          *
1469          * If the variable were set on the server, it would be cached, which is unwanted
1470          * since the post-edit state should only apply to the load right after the save.
1471          *
1472          * @param int $statusValue The status value (to check for new article status)
1473          */
1474         protected function setPostEditCookie( $statusValue ) {
1475                 $revisionId = $this->page->getLatest();
1476                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1477
1478                 $val = 'saved';
1479                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1480                         $val = 'created';
1481                 } elseif ( $this->oldid ) {
1482                         $val = 'restored';
1483                 }
1484
1485                 $response = $this->context->getRequest()->response();
1486                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1487         }
1488
1489         /**
1490          * Attempt submission
1491          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1492          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1493          * @return Status The resulting status object.
1494          */
1495         public function attemptSave( &$resultDetails = false ) {
1496                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1497                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1498                 // This is needed since PageUpdater no longer checks these rights!
1499
1500                 // Allow bots to exempt some edits from bot flagging
1501                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1502                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1503
1504                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1505
1506                 return $status;
1507         }
1508
1509         /**
1510          * Log when a page was successfully saved after the edit conflict view
1511          */
1512         private function incrementResolvedConflicts() {
1513                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1514                         return;
1515                 }
1516
1517                 $this->getEditConflictHelper()->incrementResolvedStats();
1518         }
1519
1520         /**
1521          * Handle status, such as after attempt save
1522          *
1523          * @param Status $status
1524          * @param array|bool $resultDetails
1525          *
1526          * @throws ErrorPageError
1527          * @return bool False, if output is done, true if rest of the form should be displayed
1528          */
1529         private function handleStatus( Status $status, $resultDetails ) {
1530                 /**
1531                  * @todo FIXME: once the interface for internalAttemptSave() is made
1532                  *   nicer, this should use the message in $status
1533                  */
1534                 if ( $status->value == self::AS_SUCCESS_UPDATE
1535                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1536                 ) {
1537                         $this->incrementResolvedConflicts();
1538
1539                         $this->didSave = true;
1540                         if ( !$resultDetails['nullEdit'] ) {
1541                                 $this->setPostEditCookie( $status->value );
1542                         }
1543                 }
1544
1545                 $out = $this->context->getOutput();
1546
1547                 // "wpExtraQueryRedirect" is a hidden input to modify
1548                 // after save URL and is not used by actual edit form
1549                 $request = $this->context->getRequest();
1550                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1551
1552                 switch ( $status->value ) {
1553                         case self::AS_HOOK_ERROR_EXPECTED:
1554                         case self::AS_CONTENT_TOO_BIG:
1555                         case self::AS_ARTICLE_WAS_DELETED:
1556                         case self::AS_CONFLICT_DETECTED:
1557                         case self::AS_SUMMARY_NEEDED:
1558                         case self::AS_TEXTBOX_EMPTY:
1559                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1560                         case self::AS_END:
1561                         case self::AS_BLANK_ARTICLE:
1562                         case self::AS_SELF_REDIRECT:
1563                                 return true;
1564
1565                         case self::AS_HOOK_ERROR:
1566                                 return false;
1567
1568                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1569                         case self::AS_PARSE_ERROR:
1570                         case self::AS_UNICODE_NOT_SUPPORTED:
1571                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1572                                 return true;
1573
1574                         case self::AS_SUCCESS_NEW_ARTICLE:
1575                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1576                                 if ( $extraQueryRedirect ) {
1577                                         if ( $query === '' ) {
1578                                                 $query = $extraQueryRedirect;
1579                                         } else {
1580                                                 $query = $query . '&' . $extraQueryRedirect;
1581                                         }
1582                                 }
1583                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1584                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1585                                 return false;
1586
1587                         case self::AS_SUCCESS_UPDATE:
1588                                 $extraQuery = '';
1589                                 $sectionanchor = $resultDetails['sectionanchor'];
1590
1591                                 // Give extensions a chance to modify URL query on update
1592                                 Hooks::run(
1593                                         'ArticleUpdateBeforeRedirect',
1594                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1595                                 );
1596
1597                                 if ( $resultDetails['redirect'] ) {
1598                                         if ( $extraQuery == '' ) {
1599                                                 $extraQuery = 'redirect=no';
1600                                         } else {
1601                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1602                                         }
1603                                 }
1604                                 if ( $extraQueryRedirect ) {
1605                                         if ( $extraQuery === '' ) {
1606                                                 $extraQuery = $extraQueryRedirect;
1607                                         } else {
1608                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1609                                         }
1610                                 }
1611
1612                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1613                                 return false;
1614
1615                         case self::AS_SPAM_ERROR:
1616                                 $this->spamPageWithContent( $resultDetails['spam'] );
1617                                 return false;
1618
1619                         case self::AS_BLOCKED_PAGE_FOR_USER:
1620                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1621
1622                         case self::AS_IMAGE_REDIRECT_ANON:
1623                         case self::AS_IMAGE_REDIRECT_LOGGED:
1624                                 throw new PermissionsError( 'upload' );
1625
1626                         case self::AS_READ_ONLY_PAGE_ANON:
1627                         case self::AS_READ_ONLY_PAGE_LOGGED:
1628                                 throw new PermissionsError( 'edit' );
1629
1630                         case self::AS_READ_ONLY_PAGE:
1631                                 throw new ReadOnlyError;
1632
1633                         case self::AS_RATE_LIMITED:
1634                                 throw new ThrottledError();
1635
1636                         case self::AS_NO_CREATE_PERMISSION:
1637                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1638                                 throw new PermissionsError( $permission );
1639
1640                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1641                                 throw new PermissionsError( 'editcontentmodel' );
1642
1643                         default:
1644                                 // We don't recognize $status->value. The only way that can happen
1645                                 // is if an extension hook aborted from inside ArticleSave.
1646                                 // Render the status object into $this->hookError
1647                                 // FIXME this sucks, we should just use the Status object throughout
1648                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1649                                         '</div>';
1650                                 return true;
1651                 }
1652         }
1653
1654         /**
1655          * Run hooks that can filter edits just before they get saved.
1656          *
1657          * @param Content $content The Content to filter.
1658          * @param Status $status For reporting the outcome to the caller
1659          * @param User $user The user performing the edit
1660          *
1661          * @return bool
1662          */
1663         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1664                 // Run old style post-section-merge edit filter
1665                 if ( $this->hookError != '' ) {
1666                         # ...or the hook could be expecting us to produce an error
1667                         $status->fatal( 'hookaborted' );
1668                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1669                         return false;
1670                 }
1671
1672                 // Run new style post-section-merge edit filter
1673                 if ( !Hooks::run( 'EditFilterMergedContent',
1674                                 [ $this->context, $content, $status, $this->summary,
1675                                 $user, $this->minoredit ] )
1676                 ) {
1677                         # Error messages etc. could be handled within the hook...
1678                         if ( $status->isGood() ) {
1679                                 $status->fatal( 'hookaborted' );
1680                                 // Not setting $this->hookError here is a hack to allow the hook
1681                                 // to cause a return to the edit page without $this->hookError
1682                                 // being set. This is used by ConfirmEdit to display a captcha
1683                                 // without any error message cruft.
1684                         } else {
1685                                 $this->hookError = $this->formatStatusErrors( $status );
1686                         }
1687                         // Use the existing $status->value if the hook set it
1688                         if ( !$status->value ) {
1689                                 $status->value = self::AS_HOOK_ERROR;
1690                         }
1691                         return false;
1692                 } elseif ( !$status->isOK() ) {
1693                         # ...or the hook could be expecting us to produce an error
1694                         // FIXME this sucks, we should just use the Status object throughout
1695                         $this->hookError = $this->formatStatusErrors( $status );
1696                         $status->fatal( 'hookaborted' );
1697                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1698                         return false;
1699                 }
1700
1701                 return true;
1702         }
1703
1704         /**
1705          * Wrap status errors in an errorbox for increased visibility
1706          *
1707          * @param Status $status
1708          * @return string Wikitext
1709          */
1710         private function formatStatusErrors( Status $status ) {
1711                 $errmsg = $status->getWikiText(
1712                         'edit-error-short',
1713                         'edit-error-long',
1714                         $this->context->getLanguage()
1715                 );
1716                 return <<<ERROR
1717 <div class="errorbox">
1718 {$errmsg}
1719 </div>
1720 <br clear="all" />
1721 ERROR;
1722         }
1723
1724         /**
1725          * Return the summary to be used for a new section.
1726          *
1727          * @param string $sectionanchor Set to the section anchor text
1728          * @return string
1729          */
1730         private function newSectionSummary( &$sectionanchor = null ) {
1731                 global $wgParser;
1732
1733                 if ( $this->sectiontitle !== '' ) {
1734                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1735                         // If no edit summary was specified, create one automatically from the section
1736                         // title and have it link to the new section. Otherwise, respect the summary as
1737                         // passed.
1738                         if ( $this->summary === '' ) {
1739                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1740                                 return $this->context->msg( 'newsectionsummary' )
1741                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1742                         }
1743                 } elseif ( $this->summary !== '' ) {
1744                         $sectionanchor = $this->guessSectionName( $this->summary );
1745                         # This is a new section, so create a link to the new section
1746                         # in the revision summary.
1747                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1748                         return $this->context->msg( 'newsectionsummary' )
1749                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1750                 }
1751                 return $this->summary;
1752         }
1753
1754         /**
1755          * Attempt submission (no UI)
1756          *
1757          * @param array &$result Array to add statuses to, currently with the
1758          *   possible keys:
1759          *   - spam (string): Spam string from content if any spam is detected by
1760          *     matchSpamRegex.
1761          *   - sectionanchor (string): Section anchor for a section save.
1762          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1763          *     false otherwise.
1764          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1765          *     revision is a redirect.
1766          * @param bool $bot True if edit is being made under the bot right.
1767          *
1768          * @return Status Status object, possibly with a message, but always with
1769          *   one of the AS_* constants in $status->value,
1770          *
1771          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1772          *   various error display idiosyncrasies. There are also lots of cases
1773          *   where error metadata is set in the object and retrieved later instead
1774          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1775          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1776          * time.
1777          */
1778         public function internalAttemptSave( &$result, $bot = false ) {
1779                 $status = Status::newGood();
1780                 $user = $this->context->getUser();
1781
1782                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1783                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1784                         $status->fatal( 'hookaborted' );
1785                         $status->value = self::AS_HOOK_ERROR;
1786                         return $status;
1787                 }
1788
1789                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1790                         $status->fatal( 'unicode-support-fail' );
1791                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1792                         return $status;
1793                 }
1794
1795                 $request = $this->context->getRequest();
1796                 $spam = $request->getText( 'wpAntispam' );
1797                 if ( $spam !== '' ) {
1798                         wfDebugLog(
1799                                 'SimpleAntiSpam',
1800                                 $user->getName() .
1801                                 ' editing "' .
1802                                 $this->mTitle->getPrefixedText() .
1803                                 '" submitted bogus field "' .
1804                                 $spam .
1805                                 '"'
1806                         );
1807                         $status->fatal( 'spamprotectionmatch', false );
1808                         $status->value = self::AS_SPAM_ERROR;
1809                         return $status;
1810                 }
1811
1812                 try {
1813                         # Construct Content object
1814                         $textbox_content = $this->toEditContent( $this->textbox1 );
1815                 } catch ( MWContentSerializationException $ex ) {
1816                         $status->fatal(
1817                                 'content-failed-to-parse',
1818                                 $this->contentModel,
1819                                 $this->contentFormat,
1820                                 $ex->getMessage()
1821                         );
1822                         $status->value = self::AS_PARSE_ERROR;
1823                         return $status;
1824                 }
1825
1826                 # Check image redirect
1827                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1828                         $textbox_content->isRedirect() &&
1829                         !$user->isAllowed( 'upload' )
1830                 ) {
1831                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1832                                 $status->setResult( false, $code );
1833
1834                                 return $status;
1835                 }
1836
1837                 # Check for spam
1838                 $match = self::matchSummarySpamRegex( $this->summary );
1839                 if ( $match === false && $this->section == 'new' ) {
1840                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1841                         # regular summaries, it is added to the actual wikitext.
1842                         if ( $this->sectiontitle !== '' ) {
1843                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1844                                 $match = self::matchSpamRegex( $this->sectiontitle );
1845                         } else {
1846                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1847                                 # is used with the 'summary' parameter.
1848                                 $match = self::matchSpamRegex( $this->summary );
1849                         }
1850                 }
1851                 if ( $match === false ) {
1852                         $match = self::matchSpamRegex( $this->textbox1 );
1853                 }
1854                 if ( $match !== false ) {
1855                         $result['spam'] = $match;
1856                         $ip = $request->getIP();
1857                         $pdbk = $this->mTitle->getPrefixedDBkey();
1858                         $match = str_replace( "\n", '', $match );
1859                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1860                         $status->fatal( 'spamprotectionmatch', $match );
1861                         $status->value = self::AS_SPAM_ERROR;
1862                         return $status;
1863                 }
1864                 if ( !Hooks::run(
1865                         'EditFilter',
1866                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1867                 ) {
1868                         # Error messages etc. could be handled within the hook...
1869                         $status->fatal( 'hookaborted' );
1870                         $status->value = self::AS_HOOK_ERROR;
1871                         return $status;
1872                 } elseif ( $this->hookError != '' ) {
1873                         # ...or the hook could be expecting us to produce an error
1874                         $status->fatal( 'hookaborted' );
1875                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1876                         return $status;
1877                 }
1878
1879                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1880                         // Auto-block user's IP if the account was "hard" blocked
1881                         if ( !wfReadOnly() ) {
1882                                 $user->spreadAnyEditBlock();
1883                         }
1884                         # Check block state against master, thus 'false'.
1885                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1886                         return $status;
1887                 }
1888
1889                 $this->contentLength = strlen( $this->textbox1 );
1890                 $config = $this->context->getConfig();
1891                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1892                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1893                         // Error will be displayed by showEditForm()
1894                         $this->tooBig = true;
1895                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1896                         return $status;
1897                 }
1898
1899                 if ( !$user->isAllowed( 'edit' ) ) {
1900                         if ( $user->isAnon() ) {
1901                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1902                                 return $status;
1903                         } else {
1904                                 $status->fatal( 'readonlytext' );
1905                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1906                                 return $status;
1907                         }
1908                 }
1909
1910                 $changingContentModel = false;
1911                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1912                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1913                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1914                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1915                                 return $status;
1916                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1917                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1918                                 return $status;
1919                         }
1920                         // Make sure the user can edit the page under the new content model too
1921                         $titleWithNewContentModel = clone $this->mTitle;
1922                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1923                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1924                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1925                         ) {
1926                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1927                                 return $status;
1928                         }
1929
1930                         $changingContentModel = true;
1931                         $oldContentModel = $this->mTitle->getContentModel();
1932                 }
1933
1934                 if ( $this->changeTags ) {
1935                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1936                                 $this->changeTags, $user );
1937                         if ( !$changeTagsStatus->isOK() ) {
1938                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1939                                 return $changeTagsStatus;
1940                         }
1941                 }
1942
1943                 if ( wfReadOnly() ) {
1944                         $status->fatal( 'readonlytext' );
1945                         $status->value = self::AS_READ_ONLY_PAGE;
1946                         return $status;
1947                 }
1948                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1949                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1950                 ) {
1951                         $status->fatal( 'actionthrottledtext' );
1952                         $status->value = self::AS_RATE_LIMITED;
1953                         return $status;
1954                 }
1955
1956                 # If the article has been deleted while editing, don't save it without
1957                 # confirmation
1958                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1959                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1960                         return $status;
1961                 }
1962
1963                 # Load the page data from the master. If anything changes in the meantime,
1964                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1965                 $this->page->loadPageData( 'fromdbmaster' );
1966                 $new = !$this->page->exists();
1967
1968                 if ( $new ) {
1969                         // Late check for create permission, just in case *PARANOIA*
1970                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1971                                 $status->fatal( 'nocreatetext' );
1972                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1973                                 wfDebug( __METHOD__ . ": no create permission\n" );
1974                                 return $status;
1975                         }
1976
1977                         // Don't save a new page if it's blank or if it's a MediaWiki:
1978                         // message with content equivalent to default (allow empty pages
1979                         // in this case to disable messages, see T52124)
1980                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1981                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1982                                 $defaultText = $defaultMessageText;
1983                         } else {
1984                                 $defaultText = '';
1985                         }
1986
1987                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1988                                 $this->blankArticle = true;
1989                                 $status->fatal( 'blankarticle' );
1990                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1991                                 return $status;
1992                         }
1993
1994                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
1995                                 return $status;
1996                         }
1997
1998                         $content = $textbox_content;
1999
2000                         $result['sectionanchor'] = '';
2001                         if ( $this->section == 'new' ) {
2002                                 if ( $this->sectiontitle !== '' ) {
2003                                         // Insert the section title above the content.
2004                                         $content = $content->addSectionHeader( $this->sectiontitle );
2005                                 } elseif ( $this->summary !== '' ) {
2006                                         // Insert the section title above the content.
2007                                         $content = $content->addSectionHeader( $this->summary );
2008                                 }
2009                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2010                         }
2011
2012                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2013
2014                 } else { # not $new
2015
2016                         # Article exists. Check for edit conflict.
2017
2018                         $this->page->clear(); # Force reload of dates, etc.
2019                         $timestamp = $this->page->getTimestamp();
2020                         $latest = $this->page->getLatest();
2021
2022                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2023
2024                         // Check editRevId if set, which handles same-second timestamp collisions
2025                         if ( $timestamp != $this->edittime
2026                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2027                         ) {
2028                                 $this->isConflict = true;
2029                                 if ( $this->section == 'new' ) {
2030                                         if ( $this->page->getUserText() == $user->getName() &&
2031                                                 $this->page->getComment() == $this->newSectionSummary()
2032                                         ) {
2033                                                 // Probably a duplicate submission of a new comment.
2034                                                 // This can happen when CDN resends a request after
2035                                                 // a timeout but the first one actually went through.
2036                                                 wfDebug( __METHOD__
2037                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2038                                         } else {
2039                                                 // New comment; suppress conflict.
2040                                                 $this->isConflict = false;
2041                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2042                                         }
2043                                 } elseif ( $this->section == ''
2044                                         && Revision::userWasLastToEdit(
2045                                                 DB_MASTER, $this->mTitle->getArticleID(),
2046                                                 $user->getId(), $this->edittime
2047                                         )
2048                                 ) {
2049                                         # Suppress edit conflict with self, except for section edits where merging is required.
2050                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2051                                         $this->isConflict = false;
2052                                 }
2053                         }
2054
2055                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2056                         if ( $this->sectiontitle !== '' ) {
2057                                 $sectionTitle = $this->sectiontitle;
2058                         } else {
2059                                 $sectionTitle = $this->summary;
2060                         }
2061
2062                         $content = null;
2063
2064                         if ( $this->isConflict ) {
2065                                 wfDebug( __METHOD__
2066                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2067                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2068                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2069                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2070                                 if ( $this->editRevId !== null ) {
2071                                         $content = $this->page->replaceSectionAtRev(
2072                                                 $this->section,
2073                                                 $textbox_content,
2074                                                 $sectionTitle,
2075                                                 $this->editRevId
2076                                         );
2077                                 } else {
2078                                         $content = $this->page->replaceSectionContent(
2079                                                 $this->section,
2080                                                 $textbox_content,
2081                                                 $sectionTitle,
2082                                                 $this->edittime
2083                                         );
2084                                 }
2085                         } else {
2086                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2087                                 $content = $this->page->replaceSectionContent(
2088                                         $this->section,
2089                                         $textbox_content,
2090                                         $sectionTitle
2091                                 );
2092                         }
2093
2094                         if ( is_null( $content ) ) {
2095                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2096                                 $this->isConflict = true;
2097                                 $content = $textbox_content; // do not try to merge here!
2098                         } elseif ( $this->isConflict ) {
2099                                 # Attempt merge
2100                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2101                                         // Successful merge! Maybe we should tell the user the good news?
2102                                         $this->isConflict = false;
2103                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2104                                 } else {
2105                                         $this->section = '';
2106                                         $this->textbox1 = ContentHandler::getContentText( $content );
2107                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2108                                 }
2109                         }
2110
2111                         if ( $this->isConflict ) {
2112                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2113                                 return $status;
2114                         }
2115
2116                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2117                                 return $status;
2118                         }
2119
2120                         if ( $this->section == 'new' ) {
2121                                 // Handle the user preference to force summaries here
2122                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2123                                         $this->missingSummary = true;
2124                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2125                                         $status->value = self::AS_SUMMARY_NEEDED;
2126                                         return $status;
2127                                 }
2128
2129                                 // Do not allow the user to post an empty comment
2130                                 if ( $this->textbox1 == '' ) {
2131                                         $this->missingComment = true;
2132                                         $status->fatal( 'missingcommenttext' );
2133                                         $status->value = self::AS_TEXTBOX_EMPTY;
2134                                         return $status;
2135                                 }
2136                         } elseif ( !$this->allowBlankSummary
2137                                 && !$content->equals( $this->getOriginalContent( $user ) )
2138                                 && !$content->isRedirect()
2139                                 && md5( $this->summary ) == $this->autoSumm
2140                         ) {
2141                                 $this->missingSummary = true;
2142                                 $status->fatal( 'missingsummary' );
2143                                 $status->value = self::AS_SUMMARY_NEEDED;
2144                                 return $status;
2145                         }
2146
2147                         # All's well
2148                         $sectionanchor = '';
2149                         if ( $this->section == 'new' ) {
2150                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2151                         } elseif ( $this->section != '' ) {
2152                                 # Try to get a section anchor from the section source, redirect
2153                                 # to edited section if header found.
2154                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2155                                 # for duplicate heading checking and maybe parsing.
2156                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2157                                 # We can't deal with anchors, includes, html etc in the header for now,
2158                                 # headline would need to be parsed to improve this.
2159                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2160                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2161                                 }
2162                         }
2163                         $result['sectionanchor'] = $sectionanchor;
2164
2165                         // Save errors may fall down to the edit form, but we've now
2166                         // merged the section into full text. Clear the section field
2167                         // so that later submission of conflict forms won't try to
2168                         // replace that into a duplicated mess.
2169                         $this->textbox1 = $this->toEditText( $content );
2170                         $this->section = '';
2171
2172                         $status->value = self::AS_SUCCESS_UPDATE;
2173                 }
2174
2175                 if ( !$this->allowSelfRedirect
2176                         && $content->isRedirect()
2177                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2178                 ) {
2179                         // If the page already redirects to itself, don't warn.
2180                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2181                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2182                                 $this->selfRedirect = true;
2183                                 $status->fatal( 'selfredirect' );
2184                                 $status->value = self::AS_SELF_REDIRECT;
2185                                 return $status;
2186                         }
2187                 }
2188
2189                 // Check for length errors again now that the section is merged in
2190                 $this->contentLength = strlen( $this->toEditText( $content ) );
2191                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2192                         $this->tooBig = true;
2193                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2194                         return $status;
2195                 }
2196
2197                 $flags = EDIT_AUTOSUMMARY |
2198                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2199                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2200                         ( $bot ? EDIT_FORCE_BOT : 0 );
2201
2202                 $doEditStatus = $this->page->doEditContent(
2203                         $content,
2204                         $this->summary,
2205                         $flags,
2206                         false,
2207                         $user,
2208                         $content->getDefaultFormat(),
2209                         $this->changeTags,
2210                         $this->undidRev
2211                 );
2212
2213                 if ( !$doEditStatus->isOK() ) {
2214                         // Failure from doEdit()
2215                         // Show the edit conflict page for certain recognized errors from doEdit(),
2216                         // but don't show it for errors from extension hooks
2217                         $errors = $doEditStatus->getErrorsArray();
2218                         if ( in_array( $errors[0][0],
2219                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2220                         ) {
2221                                 $this->isConflict = true;
2222                                 // Destroys data doEdit() put in $status->value but who cares
2223                                 $doEditStatus->value = self::AS_END;
2224                         }
2225                         return $doEditStatus;
2226                 }
2227
2228                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2229                 if ( $result['nullEdit'] ) {
2230                         // We don't know if it was a null edit until now, so increment here
2231                         $user->pingLimiter( 'linkpurge' );
2232                 }
2233                 $result['redirect'] = $content->isRedirect();
2234
2235                 $this->updateWatchlist();
2236
2237                 // If the content model changed, add a log entry
2238                 if ( $changingContentModel ) {
2239                         $this->addContentModelChangeLogEntry(
2240                                 $user,
2241                                 $new ? false : $oldContentModel,
2242                                 $this->contentModel,
2243                                 $this->summary
2244                         );
2245                 }
2246
2247                 return $status;
2248         }
2249
2250         /**
2251          * @param User $user
2252          * @param string|false $oldModel false if the page is being newly created
2253          * @param string $newModel
2254          * @param string $reason
2255          */
2256         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2257                 $new = $oldModel === false;
2258                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2259                 $log->setPerformer( $user );
2260                 $log->setTarget( $this->mTitle );
2261                 $log->setComment( $reason );
2262                 $log->setParameters( [
2263                         '4::oldmodel' => $oldModel,
2264                         '5::newmodel' => $newModel
2265                 ] );
2266                 $logid = $log->insert();
2267                 $log->publish( $logid );
2268         }
2269
2270         /**
2271          * Register the change of watch status
2272          */
2273         protected function updateWatchlist() {
2274                 $user = $this->context->getUser();
2275                 if ( !$user->isLoggedIn() ) {
2276                         return;
2277                 }
2278
2279                 $title = $this->mTitle;
2280                 $watch = $this->watchthis;
2281                 // Do this in its own transaction to reduce contention...
2282                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2283                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2284                                 return; // nothing to change
2285                         }
2286                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2287                 } );
2288         }
2289
2290         /**
2291          * Attempts to do 3-way merge of edit content with a base revision
2292          * and current content, in case of edit conflict, in whichever way appropriate
2293          * for the content type.
2294          *
2295          * @since 1.21
2296          *
2297          * @param Content $editContent
2298          *
2299          * @return bool
2300          */
2301         private function mergeChangesIntoContent( &$editContent ) {
2302                 $db = wfGetDB( DB_MASTER );
2303
2304                 // This is the revision the editor started from
2305                 $baseRevision = $this->getBaseRevision();
2306                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2307
2308                 if ( is_null( $baseContent ) ) {
2309                         return false;
2310                 }
2311
2312                 // The current state, we want to merge updates into it
2313                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2314                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2315
2316                 if ( is_null( $currentContent ) ) {
2317                         return false;
2318                 }
2319
2320                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2321
2322                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2323
2324                 if ( $result ) {
2325                         $editContent = $result;
2326                         // Update parentRevId to what we just merged.
2327                         $this->parentRevId = $currentRevision->getId();
2328                         return true;
2329                 }
2330
2331                 return false;
2332         }
2333
2334         /**
2335          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2336          *        one might think of X as the "base revision", which is NOT what this returns.
2337          * @return Revision|null Current version when the edit was started
2338          */
2339         public function getBaseRevision() {
2340                 if ( !$this->mBaseRevision ) {
2341                         $db = wfGetDB( DB_MASTER );
2342                         $this->mBaseRevision = $this->editRevId
2343                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2344                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2345                 }
2346                 return $this->mBaseRevision;
2347         }
2348
2349         /**
2350          * Check given input text against $wgSpamRegex, and return the text of the first match.
2351          *
2352          * @param string $text
2353          *
2354          * @return string|bool Matching string or false
2355          */
2356         public static function matchSpamRegex( $text ) {
2357                 global $wgSpamRegex;
2358                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2359                 $regexes = (array)$wgSpamRegex;
2360                 return self::matchSpamRegexInternal( $text, $regexes );
2361         }
2362
2363         /**
2364          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2365          *
2366          * @param string $text
2367          *
2368          * @return string|bool Matching string or false
2369          */
2370         public static function matchSummarySpamRegex( $text ) {
2371                 global $wgSummarySpamRegex;
2372                 $regexes = (array)$wgSummarySpamRegex;
2373                 return self::matchSpamRegexInternal( $text, $regexes );
2374         }
2375
2376         /**
2377          * @param string $text
2378          * @param array $regexes
2379          * @return bool|string
2380          */
2381         protected static function matchSpamRegexInternal( $text, $regexes ) {
2382                 foreach ( $regexes as $regex ) {
2383                         $matches = [];
2384                         if ( preg_match( $regex, $text, $matches ) ) {
2385                                 return $matches[0];
2386                         }
2387                 }
2388                 return false;
2389         }
2390
2391         public function setHeaders() {
2392                 $out = $this->context->getOutput();
2393
2394                 $out->addModules( 'mediawiki.action.edit' );
2395                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2396                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2397
2398                 $user = $this->context->getUser();
2399                 if ( $user->getOption( 'showtoolbar' ) ) {
2400                         // The addition of default buttons is handled by getEditToolbar() which
2401                         // has its own dependency on this module. The call here ensures the module
2402                         // is loaded in time (it has position "top") for other modules to register
2403                         // buttons (e.g. extensions, gadgets, user scripts).
2404                         $out->addModules( 'mediawiki.toolbar' );
2405                 }
2406
2407                 if ( $user->getOption( 'uselivepreview' ) ) {
2408                         $out->addModules( 'mediawiki.action.edit.preview' );
2409                 }
2410
2411                 if ( $user->getOption( 'useeditwarning' ) ) {
2412                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2413                 }
2414
2415                 # Enabled article-related sidebar, toplinks, etc.
2416                 $out->setArticleRelated( true );
2417
2418                 $contextTitle = $this->getContextTitle();
2419                 if ( $this->isConflict ) {
2420                         $msg = 'editconflict';
2421                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2422                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2423                 } else {
2424                         $msg = $contextTitle->exists()
2425                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2426                                         && $contextTitle->getDefaultMessageText() !== false
2427                                 )
2428                                 ? 'editing'
2429                                 : 'creating';
2430                 }
2431
2432                 # Use the title defined by DISPLAYTITLE magic word when present
2433                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2434                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2435                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2436                 if ( $displayTitle === false ) {
2437                         $displayTitle = $contextTitle->getPrefixedText();
2438                 }
2439                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2440
2441                 $config = $this->context->getConfig();
2442
2443                 # Transmit the name of the message to JavaScript for live preview
2444                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2445                 $out->addJsConfigVars( [
2446                         'wgEditMessage' => $msg,
2447                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2448                 ] );
2449
2450                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2451                 // editors, etc.
2452                 $out->addJsConfigVars(
2453                         'wgEditSubmitButtonLabelPublish',
2454                         $config->get( 'EditSubmitButtonLabelPublish' )
2455                 );
2456         }
2457
2458         /**
2459          * Show all applicable editing introductions
2460          */
2461         protected function showIntro() {
2462                 if ( $this->suppressIntro ) {
2463                         return;
2464                 }
2465
2466                 $out = $this->context->getOutput();
2467                 $namespace = $this->mTitle->getNamespace();
2468
2469                 if ( $namespace == NS_MEDIAWIKI ) {
2470                         # Show a warning if editing an interface message
2471                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2472                         # If this is a default message (but not css, json, or js),
2473                         # show a hint that it is translatable on translatewiki.net
2474                         if (
2475                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2476                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2477                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2478                         ) {
2479                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2480                                 if ( $defaultMessageText !== false ) {
2481                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2482                                                 'translateinterface' );
2483                                 }
2484                         }
2485                 } elseif ( $namespace == NS_FILE ) {
2486                         # Show a hint to shared repo
2487                         $file = wfFindFile( $this->mTitle );
2488                         if ( $file && !$file->isLocal() ) {
2489                                 $descUrl = $file->getDescriptionUrl();
2490                                 # there must be a description url to show a hint to shared repo
2491                                 if ( $descUrl ) {
2492                                         if ( !$this->mTitle->exists() ) {
2493                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2494                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2495                                                 ] );
2496                                         } else {
2497                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2498                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2499                                                 ] );
2500                                         }
2501                                 }
2502                         }
2503                 }
2504
2505                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2506                 # Show log extract when the user is currently blocked
2507                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2508                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2509                         $user = User::newFromName( $username, false /* allow IP users */ );
2510                         $ip = User::isIP( $username );
2511                         $block = Block::newFromTarget( $user, $user );
2512                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2513                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2514                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2515                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2516                                 # Show log extract if the user is currently blocked
2517                                 LogEventsList::showLogExtract(
2518                                         $out,
2519                                         'block',
2520                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2521                                         '',
2522                                         [
2523                                                 'lim' => 1,
2524                                                 'showIfEmpty' => false,
2525                                                 'msgKey' => [
2526                                                         'blocked-notice-logextract',
2527                                                         $user->getName() # Support GENDER in notice
2528                                                 ]
2529                                         ]
2530                                 );
2531                         }
2532                 }
2533                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2534                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2535                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2536                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2537                         ) );
2538                         if ( $this->context->getUser()->isLoggedIn() ) {
2539                                 $out->wrapWikiMsg(
2540                                         // Suppress the external link icon, consider the help url an internal one
2541                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2542                                         [
2543                                                 'newarticletext',
2544                                                 $helpLink
2545                                         ]
2546                                 );
2547                         } else {
2548                                 $out->wrapWikiMsg(
2549                                         // Suppress the external link icon, consider the help url an internal one
2550                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2551                                         [
2552                                                 'newarticletextanon',
2553                                                 $helpLink
2554                                         ]
2555                                 );
2556                         }
2557                 }
2558                 # Give a notice if the user is editing a deleted/moved page...
2559                 if ( !$this->mTitle->exists() ) {
2560                         $dbr = wfGetDB( DB_REPLICA );
2561
2562                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2563                                 '',
2564                                 [
2565                                         'lim' => 10,
2566                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2567                                         'showIfEmpty' => false,
2568                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2569                                 ]
2570                         );
2571                 }
2572         }
2573
2574         /**
2575          * Attempt to show a custom editing introduction, if supplied
2576          *
2577          * @return bool
2578          */
2579         protected function showCustomIntro() {
2580                 if ( $this->editintro ) {
2581                         $title = Title::newFromText( $this->editintro );
2582                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2583                                 // Added using template syntax, to take <noinclude>'s into account.
2584                                 $this->context->getOutput()->addWikiTextTitleTidy(
2585                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2586                                         $this->mTitle
2587                                 );
2588                                 return true;
2589                         }
2590                 }
2591                 return false;
2592         }
2593
2594         /**
2595          * Gets an editable textual representation of $content.
2596          * The textual representation can be turned by into a Content object by the
2597          * toEditContent() method.
2598          *
2599          * If $content is null or false or a string, $content is returned unchanged.
2600          *
2601          * If the given Content object is not of a type that can be edited using
2602          * the text base EditPage, an exception will be raised. Set
2603          * $this->allowNonTextContent to true to allow editing of non-textual
2604          * content.
2605          *
2606          * @param Content|null|bool|string $content
2607          * @return string The editable text form of the content.
2608          *
2609          * @throws MWException If $content is not an instance of TextContent and
2610          *   $this->allowNonTextContent is not true.
2611          */
2612         protected function toEditText( $content ) {
2613                 if ( $content === null || $content === false || is_string( $content ) ) {
2614                         return $content;
2615                 }
2616
2617                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2618                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2619                 }
2620
2621                 return $content->serialize( $this->contentFormat );
2622         }
2623
2624         /**
2625          * Turns the given text into a Content object by unserializing it.
2626          *
2627          * If the resulting Content object is not of a type that can be edited using
2628          * the text base EditPage, an exception will be raised. Set
2629          * $this->allowNonTextContent to true to allow editing of non-textual
2630          * content.
2631          *
2632          * @param string|null|bool $text Text to unserialize
2633          * @return Content|bool|null The content object created from $text. If $text was false
2634          *   or null, false resp. null will be  returned instead.
2635          *
2636          * @throws MWException If unserializing the text results in a Content
2637          *   object that is not an instance of TextContent and
2638          *   $this->allowNonTextContent is not true.
2639          */
2640         protected function toEditContent( $text ) {
2641                 if ( $text === false || $text === null ) {
2642                         return $text;
2643                 }
2644
2645                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2646                         $this->contentModel, $this->contentFormat );
2647
2648                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2649                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2650                 }
2651
2652                 return $content;
2653         }
2654
2655         /**
2656          * Send the edit form and related headers to OutputPage
2657          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2658          *     during form output near the top, for captchas and the like.
2659          *
2660          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2661          * use the EditPage::showEditForm:fields hook instead.
2662          */
2663         public function showEditForm( $formCallback = null ) {
2664                 # need to parse the preview early so that we know which templates are used,
2665                 # otherwise users with "show preview after edit box" will get a blank list
2666                 # we parse this near the beginning so that setHeaders can do the title
2667                 # setting work instead of leaving it in getPreviewText
2668                 $previewOutput = '';
2669                 if ( $this->formtype == 'preview' ) {
2670                         $previewOutput = $this->getPreviewText();
2671                 }
2672
2673                 $out = $this->context->getOutput();
2674
2675                 // Avoid PHP 7.1 warning of passing $this by reference
2676                 $editPage = $this;
2677                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2678
2679                 $this->setHeaders();
2680
2681                 $this->addTalkPageText();
2682                 $this->addEditNotices();
2683
2684                 if ( !$this->isConflict &&
2685                         $this->section != '' &&
2686                         !$this->isSectionEditSupported() ) {
2687                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2688                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2689                         // Someone is welcome to try refactoring though
2690                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2691                         return;
2692                 }
2693
2694                 $this->showHeader();
2695
2696                 $out->addHTML( $this->editFormPageTop );
2697
2698                 $user = $this->context->getUser();
2699                 if ( $user->getOption( 'previewontop' ) ) {
2700                         $this->displayPreviewArea( $previewOutput, true );
2701                 }
2702
2703                 $out->addHTML( $this->editFormTextTop );
2704
2705                 $showToolbar = true;
2706                 if ( $this->wasDeletedSinceLastEdit() ) {
2707                         if ( $this->formtype == 'save' ) {
2708                                 // Hide the toolbar and edit area, user can click preview to get it back
2709                                 // Add an confirmation checkbox and explanation.
2710                                 $showToolbar = false;
2711                         } else {
2712                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2713                                         'deletedwhileediting' );
2714                         }
2715                 }
2716
2717                 // @todo add EditForm plugin interface and use it here!
2718                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2719                 $out->addHTML( Html::openElement(
2720                         'form',
2721                         [
2722                                 'class' => 'mw-editform',
2723                                 'id' => self::EDITFORM_ID,
2724                                 'name' => self::EDITFORM_ID,
2725                                 'method' => 'post',
2726                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2727                                 'enctype' => 'multipart/form-data'
2728                         ]
2729                 ) );
2730
2731                 if ( is_callable( $formCallback ) ) {
2732                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2733                         call_user_func_array( $formCallback, [ &$out ] );
2734                 }
2735
2736                 // Add a check for Unicode support
2737                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2738
2739                 // Add an empty field to trip up spambots
2740                 $out->addHTML(
2741                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2742                         . Html::rawElement(
2743                                 'label',
2744                                 [ 'for' => 'wpAntispam' ],
2745                                 $this->context->msg( 'simpleantispam-label' )->parse()
2746                         )
2747                         . Xml::element(
2748                                 'input',
2749                                 [
2750                                         'type' => 'text',
2751                                         'name' => 'wpAntispam',
2752                                         'id' => 'wpAntispam',
2753                                         'value' => ''
2754                                 ]
2755                         )
2756                         . Xml::closeElement( 'div' )
2757                 );
2758
2759                 // Avoid PHP 7.1 warning of passing $this by reference
2760                 $editPage = $this;
2761                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2762
2763                 // Put these up at the top to ensure they aren't lost on early form submission
2764                 $this->showFormBeforeText();
2765
2766                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2767                         $username = $this->lastDelete->user_name;
2768                         $comment = CommentStore::getStore()
2769                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2770
2771                         // It is better to not parse the comment at all than to have templates expanded in the middle
2772                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2773                         $key = $comment === ''
2774                                 ? 'confirmrecreate-noreason'
2775                                 : 'confirmrecreate';
2776                         $out->addHTML(
2777                                 '<div class="mw-confirm-recreate">' .
2778                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2779                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2780                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2781                                 ) .
2782                                 '</div>'
2783                         );
2784                 }
2785
2786                 # When the summary is hidden, also hide them on preview/show changes
2787                 if ( $this->nosummary ) {
2788                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2789                 }
2790
2791                 # If a blank edit summary was previously provided, and the appropriate
2792                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2793                 # user being bounced back more than once in the event that a summary
2794                 # is not required.
2795                 # ####
2796                 # For a bit more sophisticated detection of blank summaries, hash the
2797                 # automatic one and pass that in the hidden field wpAutoSummary.
2798                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2799                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2800                 }
2801
2802                 if ( $this->undidRev ) {
2803                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2804                 }
2805
2806                 if ( $this->selfRedirect ) {
2807                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2808                 }
2809
2810                 if ( $this->hasPresetSummary ) {
2811                         // If a summary has been preset using &summary= we don't want to prompt for
2812                         // a different summary. Only prompt for a summary if the summary is blanked.
2813                         // (T19416)
2814                         $this->autoSumm = md5( '' );
2815                 }
2816
2817                 $autosumm = $this->autoSumm ?: md5( $this->summary );
2818                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2819
2820                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2821                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2822
2823                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2824                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2825
2826                 $out->enableOOUI();
2827
2828                 if ( $this->section == 'new' ) {
2829                         $this->showSummaryInput( true, $this->summary );
2830                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2831                 }
2832
2833                 $out->addHTML( $this->editFormTextBeforeContent );
2834                 if ( $this->isConflict ) {
2835                         // In an edit conflict, we turn textbox2 into the user's text,
2836                         // and textbox1 into the stored version
2837                         $this->textbox2 = $this->textbox1;
2838
2839                         $content = $this->getCurrentContent();
2840                         $this->textbox1 = $this->toEditText( $content );
2841
2842                         $editConflictHelper = $this->getEditConflictHelper();
2843                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2844                         $editConflictHelper->setContentModel( $this->contentModel );
2845                         $editConflictHelper->setContentFormat( $this->contentFormat );
2846                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2847                 }
2848
2849                 if ( !$this->mTitle->isUserConfigPage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2850                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2851                 }
2852
2853                 if ( $this->blankArticle ) {
2854                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2855                 }
2856
2857                 if ( $this->isConflict ) {
2858                         // In an edit conflict bypass the overridable content form method
2859                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2860                         // resolved between page source edits and custom ui edits using the
2861                         // custom edit ui.
2862                         $conflictTextBoxAttribs = [];
2863                         if ( $this->wasDeletedSinceLastEdit() ) {
2864                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2865                         } elseif ( $this->isOldRev ) {
2866                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2867                         }
2868
2869                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2870                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2871                 } else {
2872                         $this->showContentForm();
2873                 }
2874
2875                 $out->addHTML( $this->editFormTextAfterContent );
2876
2877                 $this->showStandardInputs();
2878
2879                 $this->showFormAfterText();
2880
2881                 $this->showTosSummary();
2882
2883                 $this->showEditTools();
2884
2885                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2886
2887                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2888
2889                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2890                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2891
2892                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2893                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2894
2895                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2896
2897                 if ( $this->isConflict ) {
2898                         try {
2899                                 $this->showConflict();
2900                         } catch ( MWContentSerializationException $ex ) {
2901                                 // this can't really happen, but be nice if it does.
2902                                 $msg = $this->context->msg(
2903                                         'content-failed-to-parse',
2904                                         $this->contentModel,
2905                                         $this->contentFormat,
2906                                         $ex->getMessage()
2907                                 );
2908                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2909                         }
2910                 }
2911
2912                 // Set a hidden field so JS knows what edit form mode we are in
2913                 if ( $this->isConflict ) {
2914                         $mode = 'conflict';
2915                 } elseif ( $this->preview ) {
2916                         $mode = 'preview';
2917                 } elseif ( $this->diff ) {
2918                         $mode = 'diff';
2919                 } else {
2920                         $mode = 'text';
2921                 }
2922                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2923
2924                 // Marker for detecting truncated form data.  This must be the last
2925                 // parameter sent in order to be of use, so do not move me.
2926                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2927                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2928
2929                 if ( !$user->getOption( 'previewontop' ) ) {
2930                         $this->displayPreviewArea( $previewOutput, false );
2931                 }
2932         }
2933
2934         /**
2935          * Wrapper around TemplatesOnThisPageFormatter to make
2936          * a "templates on this page" list.
2937          *
2938          * @param Title[] $templates
2939          * @return string HTML
2940          */
2941         public function makeTemplatesOnThisPageList( array $templates ) {
2942                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2943                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2944                 );
2945
2946                 // preview if preview, else section if section, else false
2947                 $type = false;
2948                 if ( $this->preview ) {
2949                         $type = 'preview';
2950                 } elseif ( $this->section != '' ) {
2951                         $type = 'section';
2952                 }
2953
2954                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2955                         $templateListFormatter->format( $templates, $type )
2956                 );
2957         }
2958
2959         /**
2960          * Extract the section title from current section text, if any.
2961          *
2962          * @param string $text
2963          * @return string|bool String or false
2964          */
2965         public static function extractSectionTitle( $text ) {
2966                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2967                 if ( !empty( $matches[2] ) ) {
2968                         global $wgParser;
2969                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2970                 } else {
2971                         return false;
2972                 }
2973         }
2974
2975         protected function showHeader() {
2976                 $out = $this->context->getOutput();
2977                 $user = $this->context->getUser();
2978                 if ( $this->isConflict ) {
2979                         $this->addExplainConflictHeader( $out );
2980                         $this->editRevId = $this->page->getLatest();
2981                 } else {
2982                         if ( $this->section != '' && $this->section != 'new' ) {
2983                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2984                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2985                                         if ( $sectionTitle !== false ) {
2986                                                 $this->summary = "/* $sectionTitle */ ";
2987                                         }
2988                                 }
2989                         }
2990
2991                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
2992
2993                         if ( $this->missingComment ) {
2994                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2995                         }
2996
2997                         if ( $this->missingSummary && $this->section != 'new' ) {
2998                                 $out->wrapWikiMsg(
2999                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3000                                         [ 'missingsummary', $buttonLabel ]
3001                                 );
3002                         }
3003
3004                         if ( $this->missingSummary && $this->section == 'new' ) {
3005                                 $out->wrapWikiMsg(
3006                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3007                                         [ 'missingcommentheader', $buttonLabel ]
3008                                 );
3009                         }
3010
3011                         if ( $this->blankArticle ) {
3012                                 $out->wrapWikiMsg(
3013                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3014                                         [ 'blankarticle', $buttonLabel ]
3015                                 );
3016                         }
3017
3018                         if ( $this->selfRedirect ) {
3019                                 $out->wrapWikiMsg(
3020                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3021                                         [ 'selfredirect', $buttonLabel ]
3022                                 );
3023                         }
3024
3025                         if ( $this->hookError !== '' ) {
3026                                 $out->addWikiText( $this->hookError );
3027                         }
3028
3029                         if ( $this->section != 'new' ) {
3030                                 $revision = $this->mArticle->getRevisionFetched();
3031                                 if ( $revision ) {
3032                                         // Let sysop know that this will make private content public if saved
3033
3034                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3035                                                 $out->wrapWikiMsg(
3036                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3037                                                         'rev-deleted-text-permission'
3038                                                 );
3039                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3040                                                 $out->wrapWikiMsg(
3041                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3042                                                         'rev-deleted-text-view'
3043                                                 );
3044                                         }
3045
3046                                         if ( !$revision->isCurrent() ) {
3047                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3048                                                 $out->addWikiMsg( 'editingold' );
3049                                                 $this->isOldRev = true;
3050                                         }
3051                                 } elseif ( $this->mTitle->exists() ) {
3052                                         // Something went wrong
3053
3054                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3055                                                 [ 'missing-revision', $this->oldid ] );
3056                                 }
3057                         }
3058                 }
3059
3060                 if ( wfReadOnly() ) {
3061                         $out->wrapWikiMsg(
3062                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3063                                 [ 'readonlywarning', wfReadOnlyReason() ]
3064                         );
3065                 } elseif ( $user->isAnon() ) {
3066                         if ( $this->formtype != 'preview' ) {
3067                                 $out->wrapWikiMsg(
3068                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3069                                         [ 'anoneditwarning',
3070                                                 // Log-in link
3071                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3072                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3073                                                 ] ),
3074                                                 // Sign-up link
3075                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3076                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3077                                                 ] )
3078                                         ]
3079                                 );
3080                         } else {
3081                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3082                                         'anonpreviewwarning'
3083                                 );
3084                         }
3085                 } else {
3086                         if ( $this->mTitle->isUserConfigPage() ) {
3087                                 # Check the skin exists
3088                                 if ( $this->isWrongCaseUserConfigPage() ) {
3089                                         $out->wrapWikiMsg(
3090                                                 "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3091                                                 [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3092                                         );
3093                                 }
3094                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3095                                         $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3096                                         $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3097                                         $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3098
3099                                         $warning = $isUserCssConfig
3100                                                 ? 'usercssispublic'
3101                                                 : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3102
3103                                         $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3104
3105                                         if ( $this->formtype !== 'preview' ) {
3106                                                 $config = $this->context->getConfig();
3107                                                 if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3108                                                         $out->wrapWikiMsg(
3109                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3110                                                                 [ 'usercssyoucanpreview' ]
3111                                                         );
3112                                                 } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3113                                                         $out->wrapWikiMsg(
3114                                                                 "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3115                                                                 [ 'userjsonyoucanpreview' ]
3116                                                         );
3117                                                 } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3118                                                         $out->wrapWikiMsg(
3119                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3120                                                                 [ 'userjsyoucanpreview' ]
3121                                                         );
3122                                                 }
3123                                         }
3124                                 }
3125                         }
3126                 }
3127
3128                 $this->addPageProtectionWarningHeaders();
3129
3130                 $this->addLongPageWarningHeader();
3131
3132                 # Add header copyright warning
3133                 $this->showHeaderCopyrightWarning();
3134         }
3135
3136         /**
3137          * Helper function for summary input functions, which returns the neccessary
3138          * attributes for the input.
3139          *
3140          * @param array|null $inputAttrs Array of attrs to use on the input
3141          * @return array
3142          */
3143         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3144                 $conf = $this->context->getConfig();
3145                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
3146                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3147                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3148                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
3149                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3150                         'id' => 'wpSummary',
3151                         'name' => 'wpSummary',
3152                         'maxlength' => $oldCommentSchema ? 200 : CommentStore::COMMENT_CHARACTER_LIMIT,
3153                         'tabindex' => 1,
3154                         'size' => 60,
3155                         'spellcheck' => 'true',
3156                 ];
3157         }
3158
3159         /**
3160          * Builds a standard summary input with a label.
3161          *
3162          * @param string $summary The value of the summary input
3163          * @param string $labelText The html to place inside the label
3164          * @param array $inputAttrs Array of attrs to use on the input
3165          *
3166          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3167          */
3168         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3169                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3170                         $this->getSummaryInputAttributes( $inputAttrs )
3171                 );
3172                 $inputAttrs += [
3173                         'title' => Linker::titleAttrib( 'summary' ),
3174                         'accessKey' => Linker::accesskey( 'summary' ),
3175                 ];
3176
3177                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3178                 $inputAttrs['inputId'] = $inputAttrs['id'];
3179                 $inputAttrs['id'] = 'wpSummaryWidget';
3180
3181                 return new OOUI\FieldLayout(
3182                         new OOUI\TextInputWidget( [
3183                                 'value' => $summary,
3184                                 'infusable' => true,
3185                         ] + $inputAttrs ),
3186                         [
3187                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3188                                 'align' => 'top',
3189                                 'id' => 'wpSummaryLabel',
3190                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3191                         ]
3192                 );
3193         }
3194
3195         /**
3196          * @param bool $isSubjectPreview True if this is the section subject/title
3197          *   up top, or false if this is the comment summary
3198          *   down below the textarea
3199          * @param string $summary The text of the summary to display
3200          */
3201         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3202                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3203                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3204                 if ( $isSubjectPreview ) {
3205                         if ( $this->nosummary ) {
3206                                 return;
3207                         }
3208                 } else {
3209                         if ( !$this->mShowSummaryField ) {
3210                                 return;
3211                         }
3212                 }
3213
3214                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3215                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3216                                 $summary,
3217                                 $labelText,
3218                                 [ 'class' => $summaryClass ]
3219                         ) );
3220         }
3221
3222         /**
3223          * @param bool $isSubjectPreview True if this is the section subject/title
3224          *   up top, or false if this is the comment summary
3225          *   down below the textarea
3226          * @param string $summary The text of the summary to display
3227          * @return string
3228          */
3229         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3230                 // avoid spaces in preview, gets always trimmed on save
3231                 $summary = trim( $summary );
3232                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3233                         return "";
3234                 }
3235
3236                 global $wgParser;
3237
3238                 if ( $isSubjectPreview ) {
3239                         $summary = $this->context->msg( 'newsectionsummary' )
3240                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3241                                 ->inContentLanguage()->text();
3242                 }
3243
3244                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3245
3246                 $summary = $this->context->msg( $message )->parse()
3247                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3248                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3249         }
3250
3251         protected function showFormBeforeText() {
3252                 $out = $this->context->getOutput();
3253                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3254                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3255                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3256                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3257                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3258         }
3259
3260         protected function showFormAfterText() {
3261                 /**
3262                  * To make it harder for someone to slip a user a page
3263                  * which submits an edit form to the wiki without their
3264                  * knowledge, a random token is associated with the login
3265                  * session. If it's not passed back with the submission,
3266                  * we won't save the page, or render user JavaScript and
3267                  * CSS previews.
3268                  *
3269                  * For anon editors, who may not have a session, we just
3270                  * include the constant suffix to prevent editing from
3271                  * broken text-mangling proxies.
3272                  */
3273                 $this->context->getOutput()->addHTML(
3274                         "\n" .
3275                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3276                         "\n"
3277                 );
3278         }
3279
3280         /**
3281          * Subpage overridable method for printing the form for page content editing
3282          * By default this simply outputs wpTextbox1
3283          * Subclasses can override this to provide a custom UI for editing;
3284          * be it a form, or simply wpTextbox1 with a modified content that will be
3285          * reverse modified when extracted from the post data.
3286          * Note that this is basically the inverse for importContentFormData
3287          */
3288         protected function showContentForm() {
3289                 $this->showTextbox1();
3290         }
3291
3292         /**
3293          * Method to output wpTextbox1
3294          * The $textoverride method can be used by subclasses overriding showContentForm
3295          * to pass back to this method.
3296          *
3297          * @param array $customAttribs Array of html attributes to use in the textarea
3298          * @param string $textoverride Optional text to override $this->textarea1 with
3299          */
3300         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3301                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3302                         $attribs = [ 'style' => 'display:none;' ];
3303                 } else {
3304                         $builder = new TextboxBuilder();
3305                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3306
3307                         # Is an old revision being edited?
3308                         if ( $this->isOldRev ) {
3309                                 $classes[] = 'mw-textarea-oldrev';
3310                         }
3311
3312                         $attribs = [ 'tabindex' => 1 ];
3313
3314                         if ( is_array( $customAttribs ) ) {
3315                                 $attribs += $customAttribs;
3316                         }
3317
3318                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3319                 }
3320
3321                 $this->showTextbox(
3322                         $textoverride !== null ? $textoverride : $this->textbox1,
3323                         'wpTextbox1',
3324                         $attribs
3325                 );
3326         }
3327
3328         protected function showTextbox2() {
3329                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3330         }
3331
3332         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3333                 $builder = new TextboxBuilder();
3334                 $attribs = $builder->buildTextboxAttribs(
3335                         $name,
3336                         $customAttribs,
3337                         $this->context->getUser(),
3338                         $this->mTitle
3339                 );
3340
3341                 $this->context->getOutput()->addHTML(
3342                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3343                 );
3344         }
3345
3346         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3347                 $classes = [];
3348                 if ( $isOnTop ) {
3349                         $classes[] = 'ontop';
3350                 }
3351
3352                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3353
3354                 if ( $this->formtype != 'preview' ) {
3355                         $attribs['style'] = 'display: none;';
3356                 }
3357
3358                 $out = $this->context->getOutput();
3359                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3360
3361                 if ( $this->formtype == 'preview' ) {
3362                         $this->showPreview( $previewOutput );
3363                 } else {
3364                         // Empty content container for LivePreview
3365                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3366                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3367                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3368                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3369                 }
3370
3371                 $out->addHTML( '</div>' );
3372
3373                 if ( $this->formtype == 'diff' ) {
3374                         try {
3375                                 $this->showDiff();
3376                         } catch ( MWContentSerializationException $ex ) {
3377                                 $msg = $this->context->msg(
3378                                         'content-failed-to-parse',
3379                                         $this->contentModel,
3380                                         $this->contentFormat,
3381                                         $ex->getMessage()
3382                                 );
3383                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3384                         }
3385                 }
3386         }
3387
3388         /**
3389          * Append preview output to OutputPage.
3390          * Includes category rendering if this is a category page.
3391          *
3392          * @param string $text The HTML to be output for the preview.
3393          */
3394         protected function showPreview( $text ) {
3395                 if ( $this->mArticle instanceof CategoryPage ) {
3396                         $this->mArticle->openShowCategory();
3397                 }
3398                 # This hook seems slightly odd here, but makes things more
3399                 # consistent for extensions.
3400                 $out = $this->context->getOutput();
3401                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3402                 $out->addHTML( $text );
3403                 if ( $this->mArticle instanceof CategoryPage ) {
3404                         $this->mArticle->closeShowCategory();
3405                 }
3406         }
3407
3408         /**
3409          * Get a diff between the current contents of the edit box and the
3410          * version of the page we're editing from.
3411          *
3412          * If this is a section edit, we'll replace the section as for final
3413          * save and then make a comparison.
3414          */
3415         public function showDiff() {
3416                 global $wgContLang;
3417
3418                 $oldtitlemsg = 'currentrev';
3419                 # if message does not exist, show diff against the preloaded default
3420                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3421                         $oldtext = $this->mTitle->getDefaultMessageText();
3422                         if ( $oldtext !== false ) {
3423                                 $oldtitlemsg = 'defaultmessagetext';
3424                                 $oldContent = $this->toEditContent( $oldtext );
3425                         } else {
3426                                 $oldContent = null;
3427                         }
3428                 } else {
3429                         $oldContent = $this->getCurrentContent();
3430                 }
3431
3432                 $textboxContent = $this->toEditContent( $this->textbox1 );
3433                 if ( $this->editRevId !== null ) {
3434                         $newContent = $this->page->replaceSectionAtRev(
3435                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3436                         );
3437                 } else {
3438                         $newContent = $this->page->replaceSectionContent(
3439                                 $this->section, $textboxContent, $this->summary, $this->edittime
3440                         );
3441                 }
3442
3443                 if ( $newContent ) {
3444                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3445
3446                         $user = $this->context->getUser();
3447                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3448                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3449                 }
3450
3451                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3452                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3453                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3454
3455                         if ( !$oldContent ) {
3456                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3457                         }
3458
3459                         if ( !$newContent ) {
3460                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3461                         }
3462
3463                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3464                         $de->setContent( $oldContent, $newContent );
3465
3466                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3467                         $de->showDiffStyle();
3468                 } else {
3469                         $difftext = '';
3470                 }
3471
3472                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3473         }
3474
3475         /**
3476          * Show the header copyright warning.
3477          */
3478         protected function showHeaderCopyrightWarning() {
3479                 $msg = 'editpage-head-copy-warn';
3480                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3481                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3482                                 'editpage-head-copy-warn' );
3483                 }
3484         }
3485
3486         /**
3487          * Give a chance for site and per-namespace customizations of
3488          * terms of service summary link that might exist separately
3489          * from the copyright notice.
3490          *
3491          * This will display between the save button and the edit tools,
3492          * so should remain short!
3493          */
3494         protected function showTosSummary() {
3495                 $msg = 'editpage-tos-summary';
3496                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3497                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3498                         $out = $this->context->getOutput();
3499                         $out->addHTML( '<div class="mw-tos-summary">' );
3500                         $out->addWikiMsg( $msg );
3501                         $out->addHTML( '</div>' );
3502                 }
3503         }
3504
3505         /**
3506          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3507          * characters not present on most keyboards for copying/pasting.
3508          */
3509         protected function showEditTools() {
3510                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3511                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3512                         '</div>' );
3513         }
3514
3515         /**
3516          * Get the copyright warning
3517          *
3518          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3519          * @return string
3520          */
3521         protected function getCopywarn() {
3522                 return self::getCopyrightWarning( $this->mTitle );
3523         }
3524
3525         /**
3526          * Get the copyright warning, by default returns wikitext
3527          *
3528          * @param Title $title
3529          * @param string $format Output format, valid values are any function of a Message object
3530          * @param Language|string|null $langcode Language code or Language object.
3531          * @return string
3532          */
3533         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3534                 global $wgRightsText;
3535                 if ( $wgRightsText ) {
3536                         $copywarnMsg = [ 'copyrightwarning',
3537                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3538                                 $wgRightsText ];
3539                 } else {
3540                         $copywarnMsg = [ 'copyrightwarning2',
3541                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3542                 }
3543                 // Allow for site and per-namespace customization of contribution/copyright notice.
3544                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3545
3546                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3547                 if ( $langcode ) {
3548                         $msg->inLanguage( $langcode );
3549                 }
3550                 return "<div id=\"editpage-copywarn\">\n" .
3551                         $msg->$format() . "\n</div>";
3552         }
3553
3554         /**
3555          * Get the Limit report for page previews
3556          *
3557          * @since 1.22
3558          * @param ParserOutput $output ParserOutput object from the parse
3559          * @return string HTML
3560          */
3561         public static function getPreviewLimitReport( $output ) {
3562                 global $wgLang;
3563
3564                 if ( !$output || !$output->getLimitReportData() ) {
3565                         return '';
3566                 }
3567
3568                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3569                         wfMessage( 'limitreport-title' )->parseAsBlock()
3570                 );
3571
3572                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3573                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3574
3575                 $limitReport .= Html::openElement( 'table', [
3576                         'class' => 'preview-limit-report wikitable'
3577                 ] ) .
3578                         Html::openElement( 'tbody' );
3579
3580                 foreach ( $output->getLimitReportData() as $key => $value ) {
3581                         if ( Hooks::run( 'ParserLimitReportFormat',
3582                                 [ $key, &$value, &$limitReport, true, true ]
3583                         ) ) {
3584                                 $keyMsg = wfMessage( $key );
3585                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3586                                 if ( !$valueMsg->exists() ) {
3587                                         $valueMsg = new RawMessage( '$1' );
3588                                 }
3589                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3590                                         $limitReport .= Html::openElement( 'tr' ) .
3591                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3592                                                 Html::rawElement( 'td', null,
3593                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3594                                                 ) .
3595                                                 Html::closeElement( 'tr' );
3596                                 }
3597                         }
3598                 }
3599
3600                 $limitReport .= Html::closeElement( 'tbody' ) .
3601                         Html::closeElement( 'table' ) .
3602                         Html::closeElement( 'div' );
3603
3604                 return $limitReport;
3605         }
3606
3607         protected function showStandardInputs( &$tabindex = 2 ) {
3608                 $out = $this->context->getOutput();
3609                 $out->addHTML( "<div class='editOptions'>\n" );
3610
3611                 if ( $this->section != 'new' ) {
3612                         $this->showSummaryInput( false, $this->summary );
3613                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3614                 }
3615
3616                 $checkboxes = $this->getCheckboxesWidget(
3617                         $tabindex,
3618                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3619                 );
3620                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3621
3622                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3623
3624                 // Show copyright warning.
3625                 $out->addWikiText( $this->getCopywarn() );
3626                 $out->addHTML( $this->editFormTextAfterWarn );
3627
3628                 $out->addHTML( "<div class='editButtons'>\n" );
3629                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3630
3631                 $cancel = $this->getCancelLink();
3632
3633                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3634                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3635                 $edithelp =
3636                         Html::linkButton(
3637                                 $this->context->msg( 'edithelp' )->text(),
3638                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3639                                 [ 'mw-ui-quiet' ]
3640                         ) .
3641                         $this->context->msg( 'word-separator' )->escaped() .
3642                         $this->context->msg( 'newwindow' )->parse();
3643
3644                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3645                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3646                 $out->addHTML( "</div><!-- editButtons -->\n" );
3647
3648                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3649
3650                 $out->addHTML( "</div><!-- editOptions -->\n" );
3651         }
3652
3653         /**
3654          * Show an edit conflict. textbox1 is already shown in showEditForm().
3655          * If you want to use another entry point to this function, be careful.
3656          */
3657         protected function showConflict() {
3658                 $out = $this->context->getOutput();
3659                 // Avoid PHP 7.1 warning of passing $this by reference
3660                 $editPage = $this;
3661                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3662                         $this->incrementConflictStats();
3663
3664                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3665                 }
3666         }
3667
3668         protected function incrementConflictStats() {
3669                 $this->getEditConflictHelper()->incrementConflictStats();
3670         }
3671
3672         /**
3673          * @return string
3674          */
3675         public function getCancelLink() {
3676                 $cancelParams = [];
3677                 if ( !$this->isConflict && $this->oldid > 0 ) {
3678                         $cancelParams['oldid'] = $this->oldid;
3679                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3680                         $cancelParams['redirect'] = 'no';
3681                 }
3682
3683                 return new OOUI\ButtonWidget( [
3684                         'id' => 'mw-editform-cancel',
3685                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3686                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3687                         'framed' => false,
3688                         'infusable' => true,
3689                         'flags' => 'destructive',
3690                 ] );
3691         }
3692
3693         /**
3694          * Returns the URL to use in the form's action attribute.
3695          * This is used by EditPage subclasses when simply customizing the action
3696          * variable in the constructor is not enough. This can be used when the
3697          * EditPage lives inside of a Special page rather than a custom page action.
3698          *
3699          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3700          * @return string
3701          */
3702         protected function getActionURL( Title $title ) {
3703                 return $title->getLocalURL( [ 'action' => $this->action ] );
3704         }
3705
3706         /**
3707          * Check if a page was deleted while the user was editing it, before submit.
3708          * Note that we rely on the logging table, which hasn't been always there,
3709          * but that doesn't matter, because this only applies to brand new
3710          * deletes.
3711          * @return bool
3712          */
3713         protected function wasDeletedSinceLastEdit() {
3714                 if ( $this->deletedSinceEdit !== null ) {
3715                         return $this->deletedSinceEdit;
3716                 }
3717
3718                 $this->deletedSinceEdit = false;
3719
3720                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3721                         $this->lastDelete = $this->getLastDelete();
3722                         if ( $this->lastDelete ) {
3723                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3724                                 if ( $deleteTime > $this->starttime ) {
3725                                         $this->deletedSinceEdit = true;
3726                                 }
3727                         }
3728                 }
3729
3730                 return $this->deletedSinceEdit;
3731         }
3732
3733         /**
3734          * @return bool|stdClass
3735          */
3736         protected function getLastDelete() {
3737                 $dbr = wfGetDB( DB_REPLICA );
3738                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3739                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3740                 $data = $dbr->selectRow(
3741                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3742                         [
3743                                 'log_type',
3744                                 'log_action',
3745                                 'log_timestamp',
3746                                 'log_namespace',
3747                                 'log_title',
3748                                 'log_params',
3749                                 'log_deleted',
3750                                 'user_name'
3751                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3752                         [
3753                                 'log_namespace' => $this->mTitle->getNamespace(),
3754                                 'log_title' => $this->mTitle->getDBkey(),
3755                                 'log_type' => 'delete',
3756                                 'log_action' => 'delete',
3757                         ],
3758                         __METHOD__,
3759                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3760                         [
3761                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3762                         ] + $commentQuery['joins'] + $actorQuery['joins']
3763                 );
3764                 // Quick paranoid permission checks...
3765                 if ( is_object( $data ) ) {
3766                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3767                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3768                         }
3769
3770                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3771                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3772                                 $data->log_comment_data = null;
3773                         }
3774                 }
3775
3776                 return $data;
3777         }
3778
3779         /**
3780          * Get the rendered text for previewing.
3781          * @throws MWException
3782          * @return string
3783          */
3784         public function getPreviewText() {
3785                 $out = $this->context->getOutput();
3786                 $config = $this->context->getConfig();
3787
3788                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3789                         // Could be an offsite preview attempt. This is very unsafe if
3790                         // HTML is enabled, as it could be an attack.
3791                         $parsedNote = '';
3792                         if ( $this->textbox1 !== '' ) {
3793                                 // Do not put big scary notice, if previewing the empty
3794                                 // string, which happens when you initially edit
3795                                 // a category page, due to automatic preview-on-open.
3796                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3797                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3798                                         true, /* interface */true );
3799                         }
3800                         $this->incrementEditFailureStats( 'session_loss' );
3801                         return $parsedNote;
3802                 }
3803
3804                 $note = '';
3805
3806                 try {
3807                         $content = $this->toEditContent( $this->textbox1 );
3808
3809                         $previewHTML = '';
3810                         if ( !Hooks::run(
3811                                 'AlternateEditPreview',
3812                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3813                         ) {
3814                                 return $previewHTML;
3815                         }
3816
3817                         # provide a anchor link to the editform
3818                         $continueEditing = '<span class="mw-continue-editing">' .
3819                                 '[[#' . self::EDITFORM_ID . '|' .
3820                                 $this->context->getLanguage()->getArrow() . ' ' .
3821                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3822                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3823                                 if ( $this->mTokenOkExceptSuffix ) {
3824                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3825                                         $this->incrementEditFailureStats( 'bad_token' );
3826                                 } else {
3827                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3828                                         $this->incrementEditFailureStats( 'session_loss' );
3829                                 }
3830                         } elseif ( $this->incompleteForm ) {
3831                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3832                                 if ( $this->mTriedSave ) {
3833                                         $this->incrementEditFailureStats( 'incomplete_form' );
3834                                 }
3835                         } else {
3836                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3837                         }
3838
3839                         # don't parse non-wikitext pages, show message about preview
3840                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3841                                 if ( $this->mTitle->isUserConfigPage() ) {
3842                                         $level = 'user';
3843                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3844                                         $level = 'site';
3845                                 } else {
3846                                         $level = false;
3847                                 }
3848
3849                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3850                                         $format = 'css';
3851                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3852                                                 $format = false;
3853                                         }
3854                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3855                                         $format = 'json';
3856                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3857                                                 $format = false;
3858                                         }
3859                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3860                                         $format = 'js';
3861                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3862                                                 $format = false;
3863                                         }
3864                                 } else {
3865                                         $format = false;
3866                                 }
3867
3868                                 # Used messages to make sure grep find them:
3869                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
3870                                 #   sitecsspreview, sitejsonpreview, sitejspreview
3871                                 if ( $level && $format ) {
3872                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3873                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3874                                                 ' ' . $continueEditing . "</div>";
3875                                 }
3876                         }
3877
3878                         # If we're adding a comment, we need to show the
3879                         # summary as the headline
3880                         if ( $this->section === "new" && $this->summary !== "" ) {
3881                                 $content = $content->addSectionHeader( $this->summary );
3882                         }
3883
3884                         $hook_args = [ $this, &$content ];
3885                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3886
3887                         $parserResult = $this->doPreviewParse( $content );
3888                         $parserOutput = $parserResult['parserOutput'];
3889                         $previewHTML = $parserResult['html'];
3890                         $this->mParserOutput = $parserOutput;
3891                         $out->addParserOutputMetadata( $parserOutput );
3892                         if ( $out->userCanPreview() ) {
3893                                 $out->addContentOverride( $this->getTitle(), $content );
3894                         }
3895
3896                         if ( count( $parserOutput->getWarnings() ) ) {
3897                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3898                         }
3899
3900                 } catch ( MWContentSerializationException $ex ) {
3901                         $m = $this->context->msg(
3902                                 'content-failed-to-parse',
3903                                 $this->contentModel,
3904                                 $this->contentFormat,
3905                                 $ex->getMessage()
3906                         );
3907                         $note .= "\n\n" . $m->parse();
3908                         $previewHTML = '';
3909                 }
3910
3911                 if ( $this->isConflict ) {
3912                         $conflict = '<h2 id="mw-previewconflict">'
3913                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3914                 } else {
3915                         $conflict = '<hr />';
3916                 }
3917
3918                 $previewhead = "<div class='previewnote'>\n" .
3919                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3920                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3921
3922                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3923                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3924                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3925                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3926
3927                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3928         }
3929
3930         private function incrementEditFailureStats( $failureType ) {
3931                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3932                 $stats->increment( 'edit.failures.' . $failureType );
3933         }
3934
3935         /**
3936          * Get parser options for a preview
3937          * @return ParserOptions
3938          */
3939         protected function getPreviewParserOptions() {
3940                 $parserOptions = $this->page->makeParserOptions( $this->context );
3941                 $parserOptions->setIsPreview( true );
3942                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3943                 $parserOptions->enableLimitReport();
3944                 return $parserOptions;
3945         }
3946
3947         /**
3948          * Parse the page for a preview. Subclasses may override this class, in order
3949          * to parse with different options, or to otherwise modify the preview HTML.
3950          *
3951          * @param Content $content The page content
3952          * @return array with keys:
3953          *   - parserOutput: The ParserOutput object
3954          *   - html: The HTML to be displayed
3955          */
3956         protected function doPreviewParse( Content $content ) {
3957                 $user = $this->context->getUser();
3958                 $parserOptions = $this->getPreviewParserOptions();
3959                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
3960                 $scopedCallback = $parserOptions->setupFakeRevision(
3961                         $this->mTitle, $pstContent, $user );
3962                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3963                 ScopedCallback::consume( $scopedCallback );
3964                 return [
3965                         'parserOutput' => $parserOutput,
3966                         'html' => $parserOutput->getText( [
3967                                 'enableSectionEditLinks' => false
3968                         ] )
3969                 ];
3970         }
3971
3972         /**
3973          * @return array
3974          */
3975         public function getTemplates() {
3976                 if ( $this->preview || $this->section != '' ) {
3977                         $templates = [];
3978                         if ( !isset( $this->mParserOutput ) ) {
3979                                 return $templates;
3980                         }
3981                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3982                                 foreach ( array_keys( $template ) as $dbk ) {
3983                                         $templates[] = Title::makeTitle( $ns, $dbk );
3984                                 }
3985                         }
3986                         return $templates;
3987                 } else {
3988                         return $this->mTitle->getTemplateLinksFrom();
3989                 }
3990         }
3991
3992         /**
3993          * Shows a bulletin board style toolbar for common editing functions.
3994          * It can be disabled in the user preferences.
3995          *
3996          * @param Title $title Title object for the page being edited (optional)
3997          * @return string
3998          */
3999         public static function getEditToolbar( $title = null ) {
4000                 global $wgContLang, $wgOut;
4001                 global $wgEnableUploads, $wgForeignFileRepos;
4002
4003                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4004                 $showSignature = true;
4005                 if ( $title ) {
4006                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4007                 }
4008
4009                 /**
4010                  * $toolarray is an array of arrays each of which includes the
4011                  * opening tag, the closing tag, optionally a sample text that is
4012                  * inserted between the two when no selection is highlighted
4013                  * and.  The tip text is shown when the user moves the mouse
4014                  * over the button.
4015                  *
4016                  * Images are defined in ResourceLoaderEditToolbarModule.
4017                  */
4018                 $toolarray = [
4019                         [
4020                                 'id'     => 'mw-editbutton-bold',
4021                                 'open'   => '\'\'\'',
4022                                 'close'  => '\'\'\'',
4023                                 'sample' => wfMessage( 'bold_sample' )->text(),
4024                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4025                         ],
4026                         [
4027                                 'id'     => 'mw-editbutton-italic',
4028                                 'open'   => '\'\'',
4029                                 'close'  => '\'\'',
4030                                 'sample' => wfMessage( 'italic_sample' )->text(),
4031                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4032                         ],
4033                         [
4034                                 'id'     => 'mw-editbutton-link',
4035                                 'open'   => '[[',
4036                                 'close'  => ']]',
4037                                 'sample' => wfMessage( 'link_sample' )->text(),
4038                                 'tip'    => wfMessage( 'link_tip' )->text(),
4039                         ],
4040                         [
4041                                 'id'     => 'mw-editbutton-extlink',
4042                                 'open'   => '[',
4043                                 'close'  => ']',
4044                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4045                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4046                         ],
4047                         [
4048                                 'id'     => 'mw-editbutton-headline',
4049                                 'open'   => "\n== ",
4050                                 'close'  => " ==\n",
4051                                 'sample' => wfMessage( 'headline_sample' )->text(),
4052                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4053                         ],
4054                         $imagesAvailable ? [
4055                                 'id'     => 'mw-editbutton-image',
4056                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4057                                 'close'  => ']]',
4058                                 'sample' => wfMessage( 'image_sample' )->text(),
4059                                 'tip'    => wfMessage( 'image_tip' )->text(),
4060                         ] : false,
4061                         $imagesAvailable ? [
4062                                 'id'     => 'mw-editbutton-media',
4063                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4064                                 'close'  => ']]',
4065                                 'sample' => wfMessage( 'media_sample' )->text(),
4066                                 'tip'    => wfMessage( 'media_tip' )->text(),
4067                         ] : false,
4068                         [
4069                                 'id'     => 'mw-editbutton-nowiki',
4070                                 'open'   => "<nowiki>",
4071                                 'close'  => "</nowiki>",
4072                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4073                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4074                         ],
4075                         $showSignature ? [
4076                                 'id'     => 'mw-editbutton-signature',
4077                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4078                                 'close'  => '',
4079                                 'sample' => '',
4080                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4081                         ] : false,
4082                         [
4083                                 'id'     => 'mw-editbutton-hr',
4084                                 'open'   => "\n----\n",
4085                                 'close'  => '',
4086                                 'sample' => '',
4087                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4088                         ]
4089                 ];
4090
4091                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4092                 foreach ( $toolarray as $tool ) {
4093                         if ( !$tool ) {
4094                                 continue;
4095                         }
4096
4097                         $params = [
4098                                 // Images are defined in ResourceLoaderEditToolbarModule
4099                                 false,
4100                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4101                                 // Older browsers show a "speedtip" type message only for ALT.
4102                                 // Ideally these should be different, realistically they
4103                                 // probably don't need to be.
4104                                 $tool['tip'],
4105                                 $tool['open'],
4106                                 $tool['close'],
4107                                 $tool['sample'],
4108                                 $tool['id'],
4109                         ];
4110
4111                         $script .= Xml::encodeJsCall(
4112                                 'mw.toolbar.addButton',
4113                                 $params,
4114                                 ResourceLoader::inDebugMode()
4115                         );
4116                 }
4117
4118                 $script .= '});';
4119
4120                 $toolbar = '<div id="toolbar"></div>';
4121
4122                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4123                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4124                         // been over-written by a hook caller
4125                         $nonce = $wgOut->getCSPNonce();
4126                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script, $nonce ) );
4127                 };
4128
4129                 return $toolbar;
4130         }
4131
4132         /**
4133          * Return an array of checkbox definitions.
4134          *
4135          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4136          *
4137          * Array values are associative arrays with the following keys:
4138          *  - 'label-message' (required): message for label text
4139          *  - 'id' (required): 'id' attribute for the `<input>`
4140          *  - 'default' (required): default checkedness (true or false)
4141          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4142          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4143          *    from messages like 'tooltip-foo', 'accesskey-foo'
4144          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4145          *  - 'legacy-name' (optional): short name for backwards-compatibility
4146          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4147          *   where bool indicates the checked status of the checkbox
4148          * @return array
4149          */
4150         public function getCheckboxesDefinition( $checked ) {
4151                 $checkboxes = [];
4152
4153                 $user = $this->context->getUser();
4154                 // don't show the minor edit checkbox if it's a new page or section
4155                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4156                         $checkboxes['wpMinoredit'] = [
4157                                 'id' => 'wpMinoredit',
4158                                 'label-message' => 'minoredit',
4159                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4160                                 'tooltip' => 'minoredit',
4161                                 'label-id' => 'mw-editpage-minoredit',
4162                                 'legacy-name' => 'minor',
4163                                 'default' => $checked['minor'],
4164                         ];
4165                 }
4166
4167                 if ( $user->isLoggedIn() ) {
4168                         $checkboxes['wpWatchthis'] = [
4169                                 'id' => 'wpWatchthis',
4170                                 'label-message' => 'watchthis',
4171                                 // Uses messages: tooltip-watch, accesskey-watch
4172                                 'tooltip' => 'watch',
4173                                 'label-id' => 'mw-editpage-watch',
4174                                 'legacy-name' => 'watch',
4175                                 'default' => $checked['watch'],
4176                         ];
4177                 }
4178
4179                 $editPage = $this;
4180                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4181
4182                 return $checkboxes;
4183         }
4184
4185         /**
4186          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4187          * any other added by extensions.
4188          *
4189          * @param int &$tabindex Current tabindex
4190          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4191          *                 status of the checkbox
4192          *
4193          * @return array Associative array of string keys to OOUI\FieldLayout instances
4194          */
4195         public function getCheckboxesWidget( &$tabindex, $checked ) {
4196                 $checkboxes = [];
4197                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4198
4199                 foreach ( $checkboxesDef as $name => $options ) {
4200                         $legacyName = $options['legacy-name'] ?? $name;
4201
4202                         $title = null;
4203                         $accesskey = null;
4204                         if ( isset( $options['tooltip'] ) ) {
4205                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4206                                 $title = Linker::titleAttrib( $options['tooltip'] );
4207                         }
4208                         if ( isset( $options['title-message'] ) ) {
4209                                 $title = $this->context->msg( $options['title-message'] )->text();
4210                         }
4211
4212                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4213                                 new OOUI\CheckboxInputWidget( [
4214                                         'tabIndex' => ++$tabindex,
4215                                         'accessKey' => $accesskey,
4216                                         'id' => $options['id'] . 'Widget',
4217                                         'inputId' => $options['id'],
4218                                         'name' => $name,
4219                                         'selected' => $options['default'],
4220                                         'infusable' => true,
4221                                 ] ),
4222                                 [
4223                                         'align' => 'inline',
4224                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4225                                         'title' => $title,
4226                                         'id' => $options['label-id'] ?? null,
4227                                 ]
4228                         );
4229                 }
4230
4231                 return $checkboxes;
4232         }
4233
4234         /**
4235          * Get the message key of the label for the button to save the page
4236          *
4237          * @since 1.30
4238          * @return string
4239          */
4240         protected function getSubmitButtonLabel() {
4241                 $labelAsPublish =
4242                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4243
4244                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4245                 $newPage = !$this->mTitle->exists();
4246
4247                 if ( $labelAsPublish ) {
4248                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4249                 } else {
4250                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4251                 }
4252
4253                 return $buttonLabelKey;
4254         }
4255
4256         /**
4257          * Returns an array of html code of the following buttons:
4258          * save, diff and preview
4259          *
4260          * @param int &$tabindex Current tabindex
4261          *
4262          * @return array
4263          */
4264         public function getEditButtons( &$tabindex ) {
4265                 $buttons = [];
4266
4267                 $labelAsPublish =
4268                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4269
4270                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4271                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4272
4273                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4274                         'name' => 'wpSave',
4275                         'tabIndex' => ++$tabindex,
4276                         'id' => 'wpSaveWidget',
4277                         'inputId' => 'wpSave',
4278                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4279                         'useInputTag' => true,
4280                         'flags' => [ 'progressive', 'primary' ],
4281                         'label' => $buttonLabel,
4282                         'infusable' => true,
4283                         'type' => 'submit',
4284                         // Messages used: tooltip-save, tooltip-publish
4285                         'title' => Linker::titleAttrib( $buttonTooltip ),
4286                         // Messages used: accesskey-save, accesskey-publish
4287                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4288                 ] );
4289
4290                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4291                         'name' => 'wpPreview',
4292                         'tabIndex' => ++$tabindex,
4293                         'id' => 'wpPreviewWidget',
4294                         'inputId' => 'wpPreview',
4295                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4296                         'useInputTag' => true,
4297                         'label' => $this->context->msg( 'showpreview' )->text(),
4298                         'infusable' => true,
4299                         'type' => 'submit',
4300                         // Message used: tooltip-preview
4301                         'title' => Linker::titleAttrib( 'preview' ),
4302                         // Message used: accesskey-preview
4303                         'accessKey' => Linker::accesskey( 'preview' ),
4304                 ] );
4305
4306                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4307                         'name' => 'wpDiff',
4308                         'tabIndex' => ++$tabindex,
4309                         'id' => 'wpDiffWidget',
4310                         'inputId' => 'wpDiff',
4311                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4312                         'useInputTag' => true,
4313                         'label' => $this->context->msg( 'showdiff' )->text(),
4314                         'infusable' => true,
4315                         'type' => 'submit',
4316                         // Message used: tooltip-diff
4317                         'title' => Linker::titleAttrib( 'diff' ),
4318                         // Message used: accesskey-diff
4319                         'accessKey' => Linker::accesskey( 'diff' ),
4320                 ] );
4321
4322                 // Avoid PHP 7.1 warning of passing $this by reference
4323                 $editPage = $this;
4324                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4325
4326                 return $buttons;
4327         }
4328
4329         /**
4330          * Creates a basic error page which informs the user that
4331          * they have attempted to edit a nonexistent section.
4332          */
4333         public function noSuchSectionPage() {
4334                 $out = $this->context->getOutput();
4335                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4336
4337                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4338
4339                 // Avoid PHP 7.1 warning of passing $this by reference
4340                 $editPage = $this;
4341                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4342                 $out->addHTML( $res );
4343
4344                 $out->returnToMain( false, $this->mTitle );
4345         }
4346
4347         /**
4348          * Show "your edit contains spam" page with your diff and text
4349          *
4350          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4351          */
4352         public function spamPageWithContent( $match = false ) {
4353                 $this->textbox2 = $this->textbox1;
4354
4355                 if ( is_array( $match ) ) {
4356                         $match = $this->context->getLanguage()->listToText( $match );
4357                 }
4358                 $out = $this->context->getOutput();
4359                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4360
4361                 $out->addHTML( '<div id="spamprotected">' );
4362                 $out->addWikiMsg( 'spamprotectiontext' );
4363                 if ( $match ) {
4364                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4365                 }
4366                 $out->addHTML( '</div>' );
4367
4368                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4369                 $this->showDiff();
4370
4371                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4372                 $this->showTextbox2();
4373
4374                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4375         }
4376
4377         /**
4378          * Filter an input field through a Unicode de-armoring process if it
4379          * came from an old browser with known broken Unicode editing issues.
4380          *
4381          * @deprecated since 1.30, does nothing
4382          *
4383          * @param WebRequest $request
4384          * @param string $field
4385          * @return string
4386          */
4387         protected function safeUnicodeInput( $request, $field ) {
4388                 return rtrim( $request->getText( $field ) );
4389         }
4390
4391         /**
4392          * Filter an output field through a Unicode armoring process if it is
4393          * going to an old browser with known broken Unicode editing issues.
4394          *
4395          * @deprecated since 1.30, does nothing
4396          *
4397          * @param string $text
4398          * @return string
4399          */
4400         protected function safeUnicodeOutput( $text ) {
4401                 return $text;
4402         }
4403
4404         /**
4405          * @since 1.29
4406          */
4407         protected function addEditNotices() {
4408                 $out = $this->context->getOutput();
4409                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4410                 if ( count( $editNotices ) ) {
4411                         $out->addHTML( implode( "\n", $editNotices ) );
4412                 } else {
4413                         $msg = $this->context->msg( 'editnotice-notext' );
4414                         if ( !$msg->isDisabled() ) {
4415                                 $out->addHTML(
4416                                         '<div class="mw-editnotice-notext">'
4417                                         . $msg->parseAsBlock()
4418                                         . '</div>'
4419                                 );
4420                         }
4421                 }
4422         }
4423
4424         /**
4425          * @since 1.29
4426          */
4427         protected function addTalkPageText() {
4428                 if ( $this->mTitle->isTalkPage() ) {
4429                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4430                 }
4431         }
4432
4433         /**
4434          * @since 1.29
4435          */
4436         protected function addLongPageWarningHeader() {
4437                 if ( $this->contentLength === false ) {
4438                         $this->contentLength = strlen( $this->textbox1 );
4439                 }
4440
4441                 $out = $this->context->getOutput();
4442                 $lang = $this->context->getLanguage();
4443                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4444                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4445                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4446                                 [
4447                                         'longpageerror',
4448                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4449                                         $lang->formatNum( $maxArticleSize )
4450                                 ]
4451                         );
4452                 } else {
4453                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4454                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4455                                         [
4456                                                 'longpage-hint',
4457                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4458                                                 strlen( $this->textbox1 )
4459                                         ]
4460                                 );
4461                         }
4462                 }
4463         }
4464
4465         /**
4466          * @since 1.29
4467          */
4468         protected function addPageProtectionWarningHeaders() {
4469                 $out = $this->context->getOutput();
4470                 if ( $this->mTitle->isProtected( 'edit' ) &&
4471                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4472                 ) {
4473                         # Is the title semi-protected?
4474                         if ( $this->mTitle->isSemiProtected() ) {
4475                                 $noticeMsg = 'semiprotectedpagewarning';
4476                         } else {
4477                                 # Then it must be protected based on static groups (regular)
4478                                 $noticeMsg = 'protectedpagewarning';
4479                         }
4480                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4481                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4482                 }
4483                 if ( $this->mTitle->isCascadeProtected() ) {
4484                         # Is this page under cascading protection from some source pages?
4485                         /** @var Title[] $cascadeSources */
4486                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4487                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4488                         $cascadeSourcesCount = count( $cascadeSources );
4489                         if ( $cascadeSourcesCount > 0 ) {
4490                                 # Explain, and list the titles responsible
4491                                 foreach ( $cascadeSources as $page ) {
4492                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4493                                 }
4494                         }
4495                         $notice .= '</div>';
4496                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4497                 }
4498                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4499                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4500                                 [ 'lim' => 1,
4501                                         'showIfEmpty' => false,
4502                                         'msgKey' => [ 'titleprotectedwarning' ],
4503                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4504                 }
4505         }
4506
4507         /**
4508          * @param OutputPage $out
4509          * @since 1.29
4510          */
4511         protected function addExplainConflictHeader( OutputPage $out ) {
4512                 $out->addHTML(
4513                         $this->getEditConflictHelper()->getExplainHeader()
4514                 );
4515         }
4516
4517         /**
4518          * @param string $name
4519          * @param mixed[] $customAttribs
4520          * @param User $user
4521          * @return mixed[]
4522          * @since 1.29
4523          */
4524         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4525                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4526                         $name, $customAttribs, $user, $this->mTitle
4527                 );
4528         }
4529
4530         /**
4531          * @param string $wikitext
4532          * @return string
4533          * @since 1.29
4534          */
4535         protected function addNewLineAtEnd( $wikitext ) {
4536                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4537         }
4538
4539         /**
4540          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4541          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4542          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4543          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4544          * spread the new style links more efficiently.
4545          *
4546          * @param string $text
4547          * @return string
4548          */
4549         private function guessSectionName( $text ) {
4550                 global $wgParser;
4551
4552                 // Detect Microsoft browsers
4553                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4554                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4555                         // ...and redirect them to legacy encoding, if available
4556                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4557                 }
4558                 // Meanwhile, real browsers get real anchors
4559                 return $wgParser->guessSectionNameFromWikiText( $text );
4560         }
4561
4562         /**
4563          * Set a factory function to create an EditConflictHelper
4564          *
4565          * @param callable $factory Factory function
4566          * @since 1.31
4567          */
4568         public function setEditConflictHelperFactory( callable $factory ) {
4569                 $this->editConflictHelperFactory = $factory;
4570                 $this->editConflictHelper = null;
4571         }
4572
4573         /**
4574          * @return TextConflictHelper
4575          */
4576         private function getEditConflictHelper() {
4577                 if ( !$this->editConflictHelper ) {
4578                         $this->editConflictHelper = call_user_func(
4579                                 $this->editConflictHelperFactory,
4580                                 $this->getSubmitButtonLabel()
4581                         );
4582                 }
4583
4584                 return $this->editConflictHelper;
4585         }
4586
4587         /**
4588          * @param string $submitButtonLabel
4589          * @return TextConflictHelper
4590          */
4591         private function newTextConflictHelper( $submitButtonLabel ) {
4592                 return new TextConflictHelper(
4593                         $this->getTitle(),
4594                         $this->getContext()->getOutput(),
4595                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4596                         $submitButtonLabel
4597                 );
4598         }
4599 }