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\Block\DatabaseBlock;
  24 use MediaWiki\EditPage\TextboxBuilder;
  25 use MediaWiki\EditPage\TextConflictHelper;
  26 use MediaWiki\Logger\LoggerFactory;
  27 use MediaWiki\MediaWikiServices;
  28 use Wikimedia\ScopedCallback;
  29
  30 /**
  31  * The edit page/HTML interface (split from Article)
  32  * The actual database and text munging is still in Article,
  33  * but it should get easier to call those from alternate
  34  * interfaces.
  35  *
  36  * EditPage cares about two distinct titles:
  37  * $this->mContextTitle is the page that forms submit to, links point to,
  38  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  39  * page in the database that is actually being edited. These are
  40  * usually the same, but they are now allowed to be different.
  41  *
  42  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  43  * headaches, which may be fatal.
  44  */
  45 class EditPage {
  46         /**
  47          * Used for Unicode support checks
  48          */
  49         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  50
  51         /**
  52          * Status: Article successfully updated
  53          */
  54         const AS_SUCCESS_UPDATE = 200;
  55
  56         /**
  57          * Status: Article successfully created
  58          */
  59         const AS_SUCCESS_NEW_ARTICLE = 201;
  60
  61         /**
  62          * Status: Article update aborted by a hook function
  63          */
  64         const AS_HOOK_ERROR = 210;
  65
  66         /**
  67          * Status: A hook function returned an error
  68          */
  69         const AS_HOOK_ERROR_EXPECTED = 212;
  70
  71         /**
  72          * Status: User is blocked from editing this page
  73          */
  74         const AS_BLOCKED_PAGE_FOR_USER = 215;
  75
  76         /**
  77          * Status: Content too big (> $wgMaxArticleSize)
  78          */
  79         const AS_CONTENT_TOO_BIG = 216;
  80
  81         /**
  82          * Status: this anonymous user is not allowed to edit this page
  83          */
  84         const AS_READ_ONLY_PAGE_ANON = 218;
  85
  86         /**
  87          * Status: this logged in user is not allowed to edit this page
  88          */
  89         const AS_READ_ONLY_PAGE_LOGGED = 219;
  90
  91         /**
  92          * Status: wiki is in readonly mode (wfReadOnly() == true)
  93          */
  94         const AS_READ_ONLY_PAGE = 220;
  95
  96         /**
  97          * Status: rate limiter for action 'edit' was tripped
  98          */
  99         const AS_RATE_LIMITED = 221;
 100
 101         /**
 102          * Status: article was deleted while editing and param wpRecreate == false or form
 103          * was not posted
 104          */
 105         const AS_ARTICLE_WAS_DELETED = 222;
 106
 107         /**
 108          * Status: user tried to create this page, but is not allowed to do that
 109          * ( Title->userCan('create') == false )
 110          */
 111         const AS_NO_CREATE_PERMISSION = 223;
 112
 113         /**
 114          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 115          */
 116         const AS_BLANK_ARTICLE = 224;
 117
 118         /**
 119          * Status: (non-resolvable) edit conflict
 120          */
 121         const AS_CONFLICT_DETECTED = 225;
 122
 123         /**
 124          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 125          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 126          */
 127         const AS_SUMMARY_NEEDED = 226;
 128
 129         /**
 130          * Status: user tried to create a new section without content
 131          */
 132         const AS_TEXTBOX_EMPTY = 228;
 133
 134         /**
 135          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 136          */
 137         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 138
 139         /**
 140          * Status: WikiPage::doEdit() was unsuccessful
 141          */
 142         const AS_END = 231;
 143
 144         /**
 145          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 146          */
 147         const AS_SPAM_ERROR = 232;
 148
 149         /**
 150          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 151          */
 152         const AS_IMAGE_REDIRECT_ANON = 233;
 153
 154         /**
 155          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 156          */
 157         const AS_IMAGE_REDIRECT_LOGGED = 234;
 158
 159         /**
 160          * Status: user tried to modify the content model, but is not allowed to do that
 161          * ( User::isAllowed('editcontentmodel') == false )
 162          */
 163         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 164
 165         /**
 166          * Status: user tried to create self-redirect (redirect to the same article) and
 167          * wpIgnoreSelfRedirect == false
 168          */
 169         const AS_SELF_REDIRECT = 236;
 170
 171         /**
 172          * Status: an error relating to change tagging. Look at the message key for
 173          * more details
 174          */
 175         const AS_CHANGE_TAG_ERROR = 237;
 176
 177         /**
 178          * Status: can't parse content
 179          */
 180         const AS_PARSE_ERROR = 240;
 181
 182         /**
 183          * Status: when changing the content model is disallowed due to
 184          * $wgContentHandlerUseDB being false
 185          */
 186         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 187
 188         /**
 189          * Status: edit rejected because browser doesn't support Unicode.
 190          */
 191         const AS_UNICODE_NOT_SUPPORTED = 242;
 192
 193         /**
 194          * HTML id and name for the beginning of the edit form.
 195          */
 196         const EDITFORM_ID = 'editform';
 197
 198         /**
 199          * Prefix of key for cookie used to pass post-edit state.
 200          * The revision id edited is added after this
 201          */
 202         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 203
 204         /**
 205          * Duration of PostEdit cookie, in seconds.
 206          * The cookie will be removed instantly if the JavaScript runs.
 207          *
 208          * Otherwise, though, we don't want the cookies to accumulate.
 209          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 210          * limit of only 20 cookies per domain. This still applies at least to some
 211          * versions of IE without full updates:
 212          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 213          *
 214          * A value of 20 minutes should be enough to take into account slow loads and minor
 215          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 216          */
 217         const POST_EDIT_COOKIE_DURATION = 1200;
 218
 219         /**
 220          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 221          * @var Article
 222          */
 223         public $mArticle;
 224         /** @var WikiPage */
 225         private $page;
 226
 227         /**
 228          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 229          * @var Title
 230          */
 231         public $mTitle;
 232
 233         /** @var null|Title */
 234         private $mContextTitle = null;
 235
 236         /** @var string */
 237         public $action = 'submit';
 238
 239         /** @var bool Whether an edit conflict needs to be resolved. Detected based on whether
 240          * $editRevId is different than the latest revision. When a conflict has successfully
 241          * been resolved by a 3-way-merge, this field is set to false.
 242          */
 243         public $isConflict = false;
 244
 245         /** @var bool New page or new section */
 246         public $isNew = false;
 247
 248         /** @var bool */
 249         public $deletedSinceEdit;
 250
 251         /** @var string */
 252         public $formtype;
 253
 254         /** @var bool
 255          * True the first time the edit form is rendered, false after re-rendering
 256          * with diff, save prompts, etc.
 257          */
 258         public $firsttime;
 259
 260         /** @var bool|stdClass */
 261         public $lastDelete;
 262
 263         /** @var bool */
 264         public $mTokenOk = false;
 265
 266         /** @var bool */
 267         public $mTokenOkExceptSuffix = false;
 268
 269         /** @var bool */
 270         public $mTriedSave = false;
 271
 272         /** @var bool */
 273         public $incompleteForm = false;
 274
 275         /** @var bool */
 276         public $tooBig = false;
 277
 278         /** @var bool */
 279         public $missingComment = false;
 280
 281         /** @var bool */
 282         public $missingSummary = false;
 283
 284         /** @var bool */
 285         public $allowBlankSummary = false;
 286
 287         /** @var bool */
 288         protected $blankArticle = false;
 289
 290         /** @var bool */
 291         protected $allowBlankArticle = false;
 292
 293         /** @var bool */
 294         protected $selfRedirect = false;
 295
 296         /** @var bool */
 297         protected $allowSelfRedirect = false;
 298
 299         /** @var string */
 300         public $autoSumm = '';
 301
 302         /** @var string */
 303         public $hookError = '';
 304
 305         /** @var ParserOutput */
 306         public $mParserOutput;
 307
 308         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 309         public $hasPresetSummary = false;
 310
 311         /** @var Revision|bool|null A revision object corresponding to $this->editRevId. */
 312         public $mBaseRevision = false;
 313
 314         /** @var bool */
 315         public $mShowSummaryField = true;
 316
 317         # Form values
 318
 319         /** @var bool */
 320         public $save = false;
 321
 322         /** @var bool */
 323         public $preview = false;
 324
 325         /** @var bool */
 326         public $diff = false;
 327
 328         /** @var bool */
 329         public $minoredit = false;
 330
 331         /** @var bool */
 332         public $watchthis = false;
 333
 334         /** @var bool */
 335         public $recreate = false;
 336
 337         /** @var string
 338          * Page content input field.
 339          */
 340         public $textbox1 = '';
 341
 342         /** @var string */
 343         public $textbox2 = '';
 344
 345         /** @var string */
 346         public $summary = '';
 347
 348         /** @var bool
 349          * If true, hide the summary field.
 350          */
 351         public $nosummary = false;
 352
 353         /** @var string
 354          * Timestamp of the latest revision of the page when editing was initiated
 355          * on the client.
 356          */
 357         public $edittime = '';
 358
 359         /** @var int Revision ID of the latest revision of the page when editing
 360          * was initiated on the client.  This is used to detect and resolve edit
 361          * conflicts.
 362          *
 363          * @note 0 if the page did not exist at that time.
 364          * @note When starting an edit from an old revision, this still records the current
 365          * revision at the time, not the one the edit is based on.
 366          *
 367          * @see $oldid
 368          * @see getBaseRevision()
 369          */
 370         private $editRevId = null;
 371
 372         /** @var string */
 373         public $section = '';
 374
 375         /** @var string */
 376         public $sectiontitle = '';
 377
 378         /** @var string
 379          * Timestamp from the first time the edit form was rendered.
 380          */
 381         public $starttime = '';
 382
 383         /** @var int Revision ID the edit is based on, or 0 if it's the current revision.
 384          * FIXME: This isn't used in conflict resolution--provide a better
 385          * justification or merge with parentRevId.
 386          * @see $editRevId
 387          */
 388         public $oldid = 0;
 389
 390         /** @var int Revision ID the edit is based on, adjusted when an edit conflict is resolved.
 391          * @see $editRevId
 392          * @see $oldid
 393          * @see getparentRevId()
 394          */
 395         public $parentRevId = 0;
 396
 397         /** @var string */
 398         public $editintro = '';
 399
 400         /** @var null */
 401         public $scrolltop = null;
 402
 403         /** @var bool */
 404         public $bot = true;
 405
 406         /** @var string */
 407         public $contentModel;
 408
 409         /** @var null|string */
 410         public $contentFormat = null;
 411
 412         /** @var null|array */
 413         private $changeTags = null;
 414
 415         # Placeholders for text injection by hooks (must be HTML)
 416         # extensions should take care to _append_ to the present value
 417
 418         /** @var string Before even the preview */
 419         public $editFormPageTop = '';
 420         public $editFormTextTop = '';
 421         public $editFormTextBeforeContent = '';
 422         public $editFormTextAfterWarn = '';
 423         public $editFormTextAfterTools = '';
 424         public $editFormTextBottom = '';
 425         public $editFormTextAfterContent = '';
 426         public $previewTextAfterContent = '';
 427         public $mPreloadContent = null;
 428
 429         /* $didSave should be set to true whenever an article was successfully altered. */
 430         public $didSave = false;
 431         public $undidRev = 0;
 432
 433         public $suppressIntro = false;
 434
 435         /** @var bool */
 436         protected $edit;
 437
 438         /** @var bool|int */
 439         protected $contentLength = false;
 440
 441         /**
 442          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 443          */
 444         private $enableApiEditOverride = false;
 445
 446         /**
 447          * @var IContextSource
 448          */
 449         protected $context;
 450
 451         /**
 452          * @var bool Whether an old revision is edited
 453          */
 454         private $isOldRev = false;
 455
 456         /**
 457          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 458          */
 459         private $unicodeCheck;
 460
 461         /**
 462          * Factory function to create an edit conflict helper
 463          *
 464          * @var callable
 465          */
 466         private $editConflictHelperFactory;
 467
 468         /**
 469          * @var TextConflictHelper|null
 470          */
 471         private $editConflictHelper;
 472
 473         /**
 474          * @param Article $article
 475          */
 476         public function __construct( Article $article ) {
 477                 $this->mArticle = $article;
 478                 $this->page = $article->getPage(); // model object
 479                 $this->mTitle = $article->getTitle();
 480
 481                 // Make sure the local context is in sync with other member variables.
 482                 // Particularly make sure everything is using the same WikiPage instance.
 483                 // This should probably be the case in Article as well, but it's
 484                 // particularly important for EditPage, to make use of the in-place caching
 485                 // facility in WikiPage::prepareContentForEdit.
 486                 $this->context = new DerivativeContext( $article->getContext() );
 487                 $this->context->setWikiPage( $this->page );
 488                 $this->context->setTitle( $this->mTitle );
 489
 490                 $this->contentModel = $this->mTitle->getContentModel();
 491
 492                 $handler = ContentHandler::getForModelID( $this->contentModel );
 493                 $this->contentFormat = $handler->getDefaultFormat();
 494                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 495         }
 496
 497         /**
 498          * @return Article
 499          */
 500         public function getArticle() {
 501                 return $this->mArticle;
 502         }
 503
 504         /**
 505          * @since 1.28
 506          * @return IContextSource
 507          */
 508         public function getContext() {
 509                 return $this->context;
 510         }
 511
 512         /**
 513          * @since 1.19
 514          * @return Title
 515          */
 516         public function getTitle() {
 517                 return $this->mTitle;
 518         }
 519
 520         /**
 521          * Set the context Title object
 522          *
 523          * @param Title|null $title Title object or null
 524          */
 525         public function setContextTitle( $title ) {
 526                 $this->mContextTitle = $title;
 527         }
 528
 529         /**
 530          * Get the context title object.
 531          *
 532          * If not set, $wgTitle will be returned, but this is deprecated. This will
 533          * throw an exception.
 534          *
 535          * @return Title
 536          */
 537         public function getContextTitle() {
 538                 if ( is_null( $this->mContextTitle ) ) {
 539                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 540                         global $wgTitle;
 541                         return $wgTitle;
 542                 } else {
 543                         return $this->mContextTitle;
 544                 }
 545         }
 546
 547         /**
 548          * Returns if the given content model is editable.
 549          *
 550          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 551          * @return bool
 552          * @throws MWException If $modelId has no known handler
 553          */
 554         public function isSupportedContentModel( $modelId ) {
 555                 return $this->enableApiEditOverride === true ||
 556                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 557         }
 558
 559         /**
 560          * Allow editing of content that supports API direct editing, but not general
 561          * direct editing. Set to false by default.
 562          *
 563          * @param bool $enableOverride
 564          */
 565         public function setApiEditOverride( $enableOverride ) {
 566                 $this->enableApiEditOverride = $enableOverride;
 567         }
 568
 569         /**
 570          * This is the function that gets called for "action=edit". It
 571          * sets up various member variables, then passes execution to
 572          * another function, usually showEditForm()
 573          *
 574          * The edit form is self-submitting, so that when things like
 575          * preview and edit conflicts occur, we get the same form back
 576          * with the extra stuff added.  Only when the final submission
 577          * is made and all is well do we actually save and redirect to
 578          * the newly-edited page.
 579          */
 580         public function edit() {
 581                 // Allow extensions to modify/prevent this form or submission
 582                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 583                         return;
 584                 }
 585
 586                 wfDebug( __METHOD__ . ": enter\n" );
 587
 588                 $request = $this->context->getRequest();
 589                 // If they used redlink=1 and the page exists, redirect to the main article
 590                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 591                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 592                         return;
 593                 }
 594
 595                 $this->importFormData( $request );
 596                 $this->firsttime = false;
 597
 598                 if ( wfReadOnly() && $this->save ) {
 599                         // Force preview
 600                         $this->save = false;
 601                         $this->preview = true;
 602                 }
 603
 604                 if ( $this->save ) {
 605                         $this->formtype = 'save';
 606                 } elseif ( $this->preview ) {
 607                         $this->formtype = 'preview';
 608                 } elseif ( $this->diff ) {
 609                         $this->formtype = 'diff';
 610                 } else { # First time through
 611                         $this->firsttime = true;
 612                         if ( $this->previewOnOpen() ) {
 613                                 $this->formtype = 'preview';
 614                         } else {
 615                                 $this->formtype = 'initial';
 616                         }
 617                 }
 618
 619                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 620                 if ( $permErrors ) {
 621                         wfDebug( __METHOD__ . ": User can't edit\n" );
 622
 623                         if ( $this->context->getUser()->getBlock() ) {
 624                                 // track block with a cookie if it doesn't exists already
 625                                 MediaWikiServices::getInstance()->getBlockManager()
 626                                         ->trackBlockWithCookie( $this->context->getUser() );
 627
 628                                 // Auto-block user's IP if the account was "hard" blocked
 629                                 if ( !wfReadOnly() ) {
 630                                         DeferredUpdates::addCallableUpdate( function () {
 631                                                 $this->context->getUser()->spreadAnyEditBlock();
 632                                         } );
 633                                 }
 634                         }
 635                         $this->displayPermissionsError( $permErrors );
 636
 637                         return;
 638                 }
 639
 640                 $revision = $this->mArticle->getRevisionFetched();
 641                 // Disallow editing revisions with content models different from the current one
 642                 // Undo edits being an exception in order to allow reverting content model changes.
 643                 if ( $revision
 644                         && $revision->getContentModel() !== $this->contentModel
 645                 ) {
 646                         $prevRev = null;
 647                         if ( $this->undidRev ) {
 648                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 649                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 650                         }
 651                         if ( !$this->undidRev
 652                                 || !$prevRev
 653                                 || $prevRev->getContentModel() !== $this->contentModel
 654                         ) {
 655                                 $this->displayViewSourcePage(
 656                                         $this->getContentObject(),
 657                                         $this->context->msg(
 658                                                 'contentmodelediterror',
 659                                                 $revision->getContentModel(),
 660                                                 $this->contentModel
 661                                         )->plain()
 662                                 );
 663                                 return;
 664                         }
 665                 }
 666
 667                 $this->isConflict = false;
 668
 669                 # Show applicable editing introductions
 670                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 671                         $this->showIntro();
 672                 }
 673
 674                 # Attempt submission here.  This will check for edit conflicts,
 675                 # and redundantly check for locked database, blocked IPs, etc.
 676                 # that edit() already checked just in case someone tries to sneak
 677                 # in the back door with a hand-edited submission URL.
 678
 679                 if ( $this->formtype == 'save' ) {
 680                         $resultDetails = null;
 681                         $status = $this->attemptSave( $resultDetails );
 682                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 683                                 return;
 684                         }
 685                 }
 686
 687                 # First time through: get contents, set time for conflict
 688                 # checking, etc.
 689                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 690                         if ( $this->initialiseForm() === false ) {
 691                                 $out = $this->context->getOutput();
 692                                 if ( $out->getRedirect() === '' ) { // mcrundo hack redirects, don't override it
 693                                         $this->noSuchSectionPage();
 694                                 }
 695                                 return;
 696                         }
 697
 698                         if ( !$this->mTitle->getArticleID() ) {
 699                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 700                         } else {
 701                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 702                         }
 703
 704                 }
 705
 706                 $this->showEditForm();
 707         }
 708
 709         /**
 710          * @param string $rigor Same format as Title::getUserPermissionErrors()
 711          * @return array
 712          */
 713         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 714                 $user = $this->context->getUser();
 715                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 716                 # Can this title be created?
 717                 if ( !$this->mTitle->exists() ) {
 718                         $permErrors = array_merge(
 719                                 $permErrors,
 720                                 wfArrayDiff2(
 721                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 722                                         $permErrors
 723                                 )
 724                         );
 725                 }
 726                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 727                 $remove = [];
 728                 foreach ( $permErrors as $error ) {
 729                         if ( ( $this->preview || $this->diff )
 730                                 && (
 731                                         $error[0] == 'blockedtext' ||
 732                                         $error[0] == 'autoblockedtext' ||
 733                                         $error[0] == 'systemblockedtext'
 734                                 )
 735                         ) {
 736                                 $remove[] = $error;
 737                         }
 738                 }
 739                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 740
 741                 return $permErrors;
 742         }
 743
 744         /**
 745          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 746          * but with the following differences:
 747          * - If redlink=1, the user will be redirected to the page
 748          * - If there is content to display or the error occurs while either saving,
 749          *   previewing or showing the difference, it will be a
 750          *   "View source for ..." page displaying the source code after the error message.
 751          *
 752          * @since 1.19
 753          * @param array $permErrors Array of permissions errors, as returned by
 754          *    Title::getUserPermissionsErrors().
 755          * @throws PermissionsError
 756          */
 757         protected function displayPermissionsError( array $permErrors ) {
 758                 $out = $this->context->getOutput();
 759                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 760                         // The edit page was reached via a red link.
 761                         // Redirect to the article page and let them click the edit tab if
 762                         // they really want a permission error.
 763                         $out->redirect( $this->mTitle->getFullURL() );
 764                         return;
 765                 }
 766
 767                 $content = $this->getContentObject();
 768
 769                 # Use the normal message if there's nothing to display
 770                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 771                         $action = $this->mTitle->exists() ? 'edit' :
 772                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 773                         throw new PermissionsError( $action, $permErrors );
 774                 }
 775
 776                 $this->displayViewSourcePage(
 777                         $content,
 778                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 779                 );
 780         }
 781
 782         /**
 783          * Display a read-only View Source page
 784          * @param Content $content
 785          * @param string $errorMessage additional wikitext error message to display
 786          */
 787         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 788                 $out = $this->context->getOutput();
 789                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 790
 791                 $out->setRobotPolicy( 'noindex,nofollow' );
 792                 $out->setPageTitle( $this->context->msg(
 793                         'viewsource-title',
 794                         $this->getContextTitle()->getPrefixedText()
 795                 ) );
 796                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 797                 $out->addHTML( $this->editFormPageTop );
 798                 $out->addHTML( $this->editFormTextTop );
 799
 800                 if ( $errorMessage !== '' ) {
 801                         $out->addWikiTextAsInterface( $errorMessage );
 802                         $out->addHTML( "<hr />\n" );
 803                 }
 804
 805                 # If the user made changes, preserve them when showing the markup
 806                 # (This happens when a user is blocked during edit, for instance)
 807                 if ( !$this->firsttime ) {
 808                         $text = $this->textbox1;
 809                         $out->addWikiMsg( 'viewyourtext' );
 810                 } else {
 811                         try {
 812                                 $text = $this->toEditText( $content );
 813                         } catch ( MWException $e ) {
 814                                 # Serialize using the default format if the content model is not supported
 815                                 # (e.g. for an old revision with a different model)
 816                                 $text = $content->serialize();
 817                         }
 818                         $out->addWikiMsg( 'viewsourcetext' );
 819                 }
 820
 821                 $out->addHTML( $this->editFormTextBeforeContent );
 822                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 823                 $out->addHTML( $this->editFormTextAfterContent );
 824
 825                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 826
 827                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 828
 829                 $out->addHTML( $this->editFormTextBottom );
 830                 if ( $this->mTitle->exists() ) {
 831                         $out->returnToMain( null, $this->mTitle );
 832                 }
 833         }
 834
 835         /**
 836          * Should we show a preview when the edit form is first shown?
 837          *
 838          * @return bool
 839          */
 840         protected function previewOnOpen() {
 841                 $config = $this->context->getConfig();
 842                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 843                 $request = $this->context->getRequest();
 844                 if ( $config->get( 'RawHtml' ) ) {
 845                         // If raw HTML is enabled, disable preview on open
 846                         // since it has to be posted with a token for
 847                         // security reasons
 848                         return false;
 849                 }
 850                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 851                         // Explicit override from request
 852                         return true;
 853                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 854                         // Explicit override from request
 855                         return false;
 856                 } elseif ( $this->section == 'new' ) {
 857                         // Nothing *to* preview for new sections
 858                         return false;
 859                 } elseif ( ( $request->getCheck( 'preload' ) || $this->mTitle->exists() )
 860                         && $this->context->getUser()->getOption( 'previewonfirst' )
 861                 ) {
 862                         // Standard preference behavior
 863                         return true;
 864                 } elseif ( !$this->mTitle->exists()
 865                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 866                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 867                 ) {
 868                         // Categories are special
 869                         return true;
 870                 } else {
 871                         return false;
 872                 }
 873         }
 874
 875         /**
 876          * Checks whether the user entered a skin name in uppercase,
 877          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 878          *
 879          * @return bool
 880          */
 881         protected function isWrongCaseUserConfigPage() {
 882                 if ( $this->mTitle->isUserConfigPage() ) {
 883                         $name = $this->mTitle->getSkinFromConfigSubpage();
 884                         $skins = array_merge(
 885                                 array_keys( Skin::getSkinNames() ),
 886                                 [ 'common' ]
 887                         );
 888                         return !in_array( $name, $skins )
 889                                 && in_array( strtolower( $name ), $skins );
 890                 } else {
 891                         return false;
 892                 }
 893         }
 894
 895         /**
 896          * Returns whether section editing is supported for the current page.
 897          * Subclasses may override this to replace the default behavior, which is
 898          * to check ContentHandler::supportsSections.
 899          *
 900          * @return bool True if this edit page supports sections, false otherwise.
 901          */
 902         protected function isSectionEditSupported() {
 903                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 904                 return $contentHandler->supportsSections();
 905         }
 906
 907         /**
 908          * This function collects the form data and uses it to populate various member variables.
 909          * @param WebRequest &$request
 910          * @throws ErrorPageError
 911          */
 912         public function importFormData( &$request ) {
 913                 # Section edit can come from either the form or a link
 914                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 915
 916                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 917                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 918                 }
 919
 920                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 921
 922                 if ( $request->wasPosted() ) {
 923                         # These fields need to be checked for encoding.
 924                         # Also remove trailing whitespace, but don't remove _initial_
 925                         # whitespace from the text boxes. This may be significant formatting.
 926                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 927                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 928                                 // Skip this if wpTextbox2 has input, it indicates that we came
 929                                 // from a conflict page with raw page text, not a custom form
 930                                 // modified by subclasses
 931                                 $textbox1 = $this->importContentFormData( $request );
 932                                 if ( $textbox1 !== null ) {
 933                                         $this->textbox1 = $textbox1;
 934                                 }
 935                         }
 936
 937                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 938
 939                         $this->summary = $request->getText( 'wpSummary' );
 940
 941                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 942                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 943                         # section titles.
 944                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 945
 946                         # Treat sectiontitle the same way as summary.
 947                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 948                         # currently doing double duty as both edit summary and section title. Right now this
 949                         # is just to allow API edits to work around this limitation, but this should be
 950                         # incorporated into the actual edit form when EditPage is rewritten (T20654, T28312).
 951                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 952                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 953
 954                         $this->edittime = $request->getVal( 'wpEdittime' );
 955                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 956                         $this->starttime = $request->getVal( 'wpStarttime' );
 957
 958                         $undidRev = $request->getInt( 'wpUndidRevision' );
 959                         if ( $undidRev ) {
 960                                 $this->undidRev = $undidRev;
 961                         }
 962
 963                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 964
 965                         if ( $this->textbox1 === '' && !$request->getCheck( 'wpTextbox1' ) ) {
 966                                 // wpTextbox1 field is missing, possibly due to being "too big"
 967                                 // according to some filter rules such as Suhosin's setting for
 968                                 // suhosin.request.max_value_length (d'oh)
 969                                 $this->incompleteForm = true;
 970                         } else {
 971                                 // If we receive the last parameter of the request, we can fairly
 972                                 // claim the POST request has not been truncated.
 973                                 $this->incompleteForm = !$request->getVal( 'wpUltimateParam' );
 974                         }
 975                         if ( $this->incompleteForm ) {
 976                                 # If the form is incomplete, force to preview.
 977                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 978                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 979                                 $this->preview = true;
 980                         } else {
 981                                 $this->preview = $request->getCheck( 'wpPreview' );
 982                                 $this->diff = $request->getCheck( 'wpDiff' );
 983
 984                                 // Remember whether a save was requested, so we can indicate
 985                                 // if we forced preview due to session failure.
 986                                 $this->mTriedSave = !$this->preview;
 987
 988                                 if ( $this->tokenOk( $request ) ) {
 989                                         # Some browsers will not report any submit button
 990                                         # if the user hits enter in the comment box.
 991                                         # The unmarked state will be assumed to be a save,
 992                                         # if the form seems otherwise complete.
 993                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 994                                 } elseif ( $this->diff ) {
 995                                         # Failed token check, but only requested "Show Changes".
 996                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 997                                 } else {
 998                                         # Page might be a hack attempt posted from
 999                                         # an external site. Preview instead of saving.
1000                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
1001                                         $this->preview = true;
1002                                 }
1003                         }
1004                         $this->save = !$this->preview && !$this->diff;
1005                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1006                                 $this->edittime = null;
1007                         }
1008
1009                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1010                                 $this->starttime = null;
1011                         }
1012
1013                         $this->recreate = $request->getCheck( 'wpRecreate' );
1014
1015                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1016                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1017
1018                         $user = $this->context->getUser();
1019                         # Don't force edit summaries when a user is editing their own user or talk page
1020                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1021                                 && $this->mTitle->getText() == $user->getName()
1022                         ) {
1023                                 $this->allowBlankSummary = true;
1024                         } else {
1025                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1026                                         || !$user->getOption( 'forceeditsummary' );
1027                         }
1028
1029                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1030
1031                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1032                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1033
1034                         $changeTags = $request->getVal( 'wpChangeTags' );
1035                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1036                                 $this->changeTags = [];
1037                         } else {
1038                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1039                                         $changeTags ) ) );
1040                         }
1041                 } else {
1042                         # Not a posted form? Start with nothing.
1043                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1044                         $this->textbox1 = '';
1045                         $this->summary = '';
1046                         $this->sectiontitle = '';
1047                         $this->edittime = '';
1048                         $this->editRevId = null;
1049                         $this->starttime = wfTimestampNow();
1050                         $this->edit = false;
1051                         $this->preview = false;
1052                         $this->save = false;
1053                         $this->diff = false;
1054                         $this->minoredit = false;
1055                         // Watch may be overridden by request parameters
1056                         $this->watchthis = $request->getBool( 'watchthis', false );
1057                         $this->recreate = false;
1058
1059                         // When creating a new section, we can preload a section title by passing it as the
1060                         // preloadtitle parameter in the URL (T15100)
1061                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1062                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1063                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1064                                 $this->summary = $request->getVal( 'preloadtitle' );
1065                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) !== '' ) {
1066                                 $this->summary = $request->getText( 'summary' );
1067                                 if ( $this->summary !== '' ) {
1068                                         $this->hasPresetSummary = true;
1069                                 }
1070                         }
1071
1072                         if ( $request->getVal( 'minor' ) ) {
1073                                 $this->minoredit = true;
1074                         }
1075                 }
1076
1077                 $this->oldid = $request->getInt( 'oldid' );
1078                 $this->parentRevId = $request->getInt( 'parentRevId' );
1079
1080                 $this->bot = $request->getBool( 'bot', true );
1081                 $this->nosummary = $request->getBool( 'nosummary' );
1082
1083                 // May be overridden by revision.
1084                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1085                 // May be overridden by revision.
1086                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1087
1088                 try {
1089                         $handler = ContentHandler::getForModelID( $this->contentModel );
1090                 } catch ( MWUnknownContentModelException $e ) {
1091                         throw new ErrorPageError(
1092                                 'editpage-invalidcontentmodel-title',
1093                                 'editpage-invalidcontentmodel-text',
1094                                 [ wfEscapeWikiText( $this->contentModel ) ]
1095                         );
1096                 }
1097
1098                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1099                         throw new ErrorPageError(
1100                                 'editpage-notsupportedcontentformat-title',
1101                                 'editpage-notsupportedcontentformat-text',
1102                                 [
1103                                         wfEscapeWikiText( $this->contentFormat ),
1104                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1105                                 ]
1106                         );
1107                 }
1108
1109                 /**
1110                  * @todo Check if the desired model is allowed in this namespace, and if
1111                  *   a transition from the page's current model to the new model is
1112                  *   allowed.
1113                  */
1114
1115                 $this->editintro = $request->getText( 'editintro',
1116                         // Custom edit intro for new sections
1117                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1118
1119                 // Allow extensions to modify form data
1120                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1121         }
1122
1123         /**
1124          * Subpage overridable method for extracting the page content data from the
1125          * posted form to be placed in $this->textbox1, if using customized input
1126          * this method should be overridden and return the page text that will be used
1127          * for saving, preview parsing and so on...
1128          *
1129          * @param WebRequest &$request
1130          * @return string|null
1131          */
1132         protected function importContentFormData( &$request ) {
1133                 return; // Don't do anything, EditPage already extracted wpTextbox1
1134         }
1135
1136         /**
1137          * Initialise form fields in the object
1138          * Called on the first invocation, e.g. when a user clicks an edit link
1139          * @return bool If the requested section is valid
1140          */
1141         public function initialiseForm() {
1142                 $this->edittime = $this->page->getTimestamp();
1143                 $this->editRevId = $this->page->getLatest();
1144
1145                 $content = $this->getContentObject( false ); # TODO: track content object?!
1146                 if ( $content === false ) {
1147                         return false;
1148                 }
1149                 $this->textbox1 = $this->toEditText( $content );
1150
1151                 $user = $this->context->getUser();
1152                 // activate checkboxes if user wants them to be always active
1153                 # Sort out the "watch" checkbox
1154                 if ( $user->getOption( 'watchdefault' ) ) {
1155                         # Watch all edits
1156                         $this->watchthis = true;
1157                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1158                         # Watch creations
1159                         $this->watchthis = true;
1160                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1161                         # Already watched
1162                         $this->watchthis = true;
1163                 }
1164                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1165                         $this->minoredit = true;
1166                 }
1167                 if ( $this->textbox1 === false ) {
1168                         return false;
1169                 }
1170                 return true;
1171         }
1172
1173         /**
1174          * @param Content|null $def_content The default value to return
1175          *
1176          * @return Content|null Content on success, $def_content for invalid sections
1177          *
1178          * @since 1.21
1179          */
1180         protected function getContentObject( $def_content = null ) {
1181                 $content = false;
1182
1183                 $user = $this->context->getUser();
1184                 $request = $this->context->getRequest();
1185                 // For message page not locally set, use the i18n message.
1186                 // For other non-existent articles, use preload text if any.
1187                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1188                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1189                                 # If this is a system message, get the default text.
1190                                 $msg = $this->mTitle->getDefaultMessageText();
1191
1192                                 $content = $this->toEditContent( $msg );
1193                         }
1194                         if ( $content === false ) {
1195                                 # If requested, preload some text.
1196                                 $preload = $request->getVal( 'preload',
1197                                         // Custom preload text for new sections
1198                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1199                                 $params = $request->getArray( 'preloadparams', [] );
1200
1201                                 $content = $this->getPreloadedContent( $preload, $params );
1202                         }
1203                 // For existing pages, get text based on "undo" or section parameters.
1204                 } elseif ( $this->section != '' ) {
1205                         // Get section edit text (returns $def_text for invalid sections)
1206                         $orig = $this->getOriginalContent( $user );
1207                         $content = $orig ? $orig->getSection( $this->section ) : null;
1208
1209                         if ( !$content ) {
1210                                 $content = $def_content;
1211                         }
1212                 } else {
1213                         $undoafter = $request->getInt( 'undoafter' );
1214                         $undo = $request->getInt( 'undo' );
1215
1216                         if ( $undo > 0 && $undoafter > 0 ) {
1217                                 $undorev = Revision::newFromId( $undo );
1218                                 $oldrev = Revision::newFromId( $undoafter );
1219                                 $undoMsg = null;
1220
1221                                 # Sanity check, make sure it's the right page,
1222                                 # the revisions exist and they were not deleted.
1223                                 # Otherwise, $content will be left as-is.
1224                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1225                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1226                                         !$oldrev->isDeleted( Revision::DELETED_TEXT )
1227                                 ) {
1228                                         if ( WikiPage::hasDifferencesOutsideMainSlot( $undorev, $oldrev )
1229                                                 || !$this->isSupportedContentModel( $oldrev->getContentModel() )
1230                                         ) {
1231                                                 // Hack for undo while EditPage can't handle multi-slot editing
1232                                                 $this->context->getOutput()->redirect( $this->mTitle->getFullURL( [
1233                                                         'action' => 'mcrundo',
1234                                                         'undo' => $undo,
1235                                                         'undoafter' => $undoafter,
1236                                                 ] ) );
1237                                                 return false;
1238                                         } else {
1239                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1240
1241                                                 if ( $content === false ) {
1242                                                         # Warn the user that something went wrong
1243                                                         $undoMsg = 'failure';
1244                                                 }
1245                                         }
1246
1247                                         if ( $undoMsg === null ) {
1248                                                 $oldContent = $this->page->getContent( Revision::RAW );
1249                                                 $popts = ParserOptions::newFromUserAndLang(
1250                                                         $user, MediaWikiServices::getInstance()->getContentLanguage() );
1251                                                 $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1252                                                 if ( $newContent->getModel() !== $oldContent->getModel() ) {
1253                                                         // The undo may change content
1254                                                         // model if its reverting the top
1255                                                         // edit. This can result in
1256                                                         // mismatched content model/format.
1257                                                         $this->contentModel = $newContent->getModel();
1258                                                         $this->contentFormat = $oldrev->getContentFormat();
1259                                                 }
1260
1261                                                 if ( $newContent->equals( $oldContent ) ) {
1262                                                         # Tell the user that the undo results in no change,
1263                                                         # i.e. the revisions were already undone.
1264                                                         $undoMsg = 'nochange';
1265                                                         $content = false;
1266                                                 } else {
1267                                                         # Inform the user of our success and set an automatic edit summary
1268                                                         $undoMsg = 'success';
1269
1270                                                         # If we just undid one rev, use an autosummary
1271                                                         $firstrev = $oldrev->getNext();
1272                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
1273                                                                 $userText = $undorev->getUserText();
1274                                                                 if ( $userText === '' ) {
1275                                                                         $undoSummary = $this->context->msg(
1276                                                                                 'undo-summary-username-hidden',
1277                                                                                 $undo
1278                                                                         )->inContentLanguage()->text();
1279                                                                 } else {
1280                                                                         $undoSummary = $this->context->msg(
1281                                                                                 'undo-summary',
1282                                                                                 $undo,
1283                                                                                 $userText
1284                                                                         )->inContentLanguage()->text();
1285                                                                 }
1286                                                                 if ( $this->summary === '' ) {
1287                                                                         $this->summary = $undoSummary;
1288                                                                 } else {
1289                                                                         $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1290                                                                                 ->inContentLanguage()->text() . $this->summary;
1291                                                                 }
1292                                                                 $this->undidRev = $undo;
1293                                                         }
1294                                                         $this->formtype = 'diff';
1295                                                 }
1296                                         }
1297                                 } else {
1298                                         // Failed basic sanity checks.
1299                                         // Older revisions may have been removed since the link
1300                                         // was created, or we may simply have got bogus input.
1301                                         $undoMsg = 'norev';
1302                                 }
1303
1304                                 $out = $this->context->getOutput();
1305                                 // Messages: undo-success, undo-failure, undo-main-slot-only, undo-norev,
1306                                 // undo-nochange.
1307                                 $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1308                                 $this->editFormPageTop .= Html::rawElement(
1309                                         'div', [ 'class' => $class ],
1310                                         $out->parseAsInterface(
1311                                                 $this->context->msg( 'undo-' . $undoMsg )->plain()
1312                                         )
1313                                 );
1314                         }
1315
1316                         if ( $content === false ) {
1317                                 // Hack for restoring old revisions while EditPage
1318                                 // can't handle multi-slot editing.
1319
1320                                 $curRevision = $this->page->getRevision();
1321                                 $oldRevision = $this->mArticle->getRevisionFetched();
1322
1323                                 if ( $curRevision
1324                                         && $oldRevision
1325                                         && $curRevision->getId() !== $oldRevision->getId()
1326                                         && ( WikiPage::hasDifferencesOutsideMainSlot( $oldRevision, $curRevision )
1327                                                 || !$this->isSupportedContentModel( $oldRevision->getContentModel() ) )
1328                                 ) {
1329                                         $this->context->getOutput()->redirect(
1330                                                 $this->mTitle->getFullURL(
1331                                                         [
1332                                                                 'action' => 'mcrrestore',
1333                                                                 'restore' => $oldRevision->getId(),
1334                                                         ]
1335                                                 )
1336                                         );
1337
1338                                         return false;
1339                                 }
1340                         }
1341
1342                         if ( $content === false ) {
1343                                 $content = $this->getOriginalContent( $user );
1344                         }
1345                 }
1346
1347                 return $content;
1348         }
1349
1350         /**
1351          * Get the content of the wanted revision, without section extraction.
1352          *
1353          * The result of this function can be used to compare user's input with
1354          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1355          * to the original text of the edit.
1356          *
1357          * This differs from Article::getContent() that when a missing revision is
1358          * encountered the result will be null and not the
1359          * 'missing-revision' message.
1360          *
1361          * @since 1.19
1362          * @param User $user The user to get the revision for
1363          * @return Content|null
1364          */
1365         private function getOriginalContent( User $user ) {
1366                 if ( $this->section == 'new' ) {
1367                         return $this->getCurrentContent();
1368                 }
1369                 $revision = $this->mArticle->getRevisionFetched();
1370                 if ( $revision === null ) {
1371                         $handler = ContentHandler::getForModelID( $this->contentModel );
1372                         return $handler->makeEmptyContent();
1373                 }
1374                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1375                 return $content;
1376         }
1377
1378         /**
1379          * Get the edit's parent revision ID
1380          *
1381          * The "parent" revision is the ancestor that should be recorded in this
1382          * page's revision history.  It is either the revision ID of the in-memory
1383          * article content, or in the case of a 3-way merge in order to rebase
1384          * across a recoverable edit conflict, the ID of the newer revision to
1385          * which we have rebased this page.
1386          *
1387          * @since 1.27
1388          * @return int Revision ID
1389          */
1390         public function getParentRevId() {
1391                 if ( $this->parentRevId ) {
1392                         return $this->parentRevId;
1393                 } else {
1394                         return $this->mArticle->getRevIdFetched();
1395                 }
1396         }
1397
1398         /**
1399          * Get the current content of the page. This is basically similar to
1400          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1401          * content object is returned instead of null.
1402          *
1403          * @since 1.21
1404          * @return Content
1405          */
1406         protected function getCurrentContent() {
1407                 $rev = $this->page->getRevision();
1408                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1409
1410                 if ( $content === false || $content === null ) {
1411                         $handler = ContentHandler::getForModelID( $this->contentModel );
1412                         return $handler->makeEmptyContent();
1413                 } elseif ( !$this->undidRev ) {
1414                         // Content models should always be the same since we error
1415                         // out if they are different before this point (in ->edit()).
1416                         // The exception being, during an undo, the current revision might
1417                         // differ from the prior revision.
1418                         $logger = LoggerFactory::getInstance( 'editpage' );
1419                         if ( $this->contentModel !== $rev->getContentModel() ) {
1420                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1421                                         'prev' => $this->contentModel,
1422                                         'new' => $rev->getContentModel(),
1423                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1424                                         'method' => __METHOD__
1425                                 ] );
1426                                 $this->contentModel = $rev->getContentModel();
1427                         }
1428
1429                         // Given that the content models should match, the current selected
1430                         // format should be supported.
1431                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1432                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1433
1434                                         'prev' => $this->contentFormat,
1435                                         'new' => $rev->getContentFormat(),
1436                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1437                                         'method' => __METHOD__
1438                                 ] );
1439                                 $this->contentFormat = $rev->getContentFormat();
1440                         }
1441                 }
1442                 return $content;
1443         }
1444
1445         /**
1446          * Use this method before edit() to preload some content into the edit box
1447          *
1448          * @param Content $content
1449          *
1450          * @since 1.21
1451          */
1452         public function setPreloadedContent( Content $content ) {
1453                 $this->mPreloadContent = $content;
1454         }
1455
1456         /**
1457          * Get the contents to be preloaded into the box, either set by
1458          * an earlier setPreloadText() or by loading the given page.
1459          *
1460          * @param string $preload Representing the title to preload from.
1461          * @param array $params Parameters to use (interface-message style) in the preloaded text
1462          *
1463          * @return Content
1464          *
1465          * @since 1.21
1466          */
1467         protected function getPreloadedContent( $preload, $params = [] ) {
1468                 if ( !empty( $this->mPreloadContent ) ) {
1469                         return $this->mPreloadContent;
1470                 }
1471
1472                 $handler = ContentHandler::getForModelID( $this->contentModel );
1473
1474                 if ( $preload === '' ) {
1475                         return $handler->makeEmptyContent();
1476                 }
1477
1478                 $user = $this->context->getUser();
1479                 $title = Title::newFromText( $preload );
1480
1481                 # Check for existence to avoid getting MediaWiki:Noarticletext
1482                 if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1483                         // TODO: somehow show a warning to the user!
1484                         return $handler->makeEmptyContent();
1485                 }
1486
1487                 $page = WikiPage::factory( $title );
1488                 if ( $page->isRedirect() ) {
1489                         $title = $page->getRedirectTarget();
1490                         # Same as before
1491                         if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1492                                 // TODO: somehow show a warning to the user!
1493                                 return $handler->makeEmptyContent();
1494                         }
1495                         $page = WikiPage::factory( $title );
1496                 }
1497
1498                 $parserOptions = ParserOptions::newFromUser( $user );
1499                 $content = $page->getContent( Revision::RAW );
1500
1501                 if ( !$content ) {
1502                         // TODO: somehow show a warning to the user!
1503                         return $handler->makeEmptyContent();
1504                 }
1505
1506                 if ( $content->getModel() !== $handler->getModelID() ) {
1507                         $converted = $content->convert( $handler->getModelID() );
1508
1509                         if ( !$converted ) {
1510                                 // TODO: somehow show a warning to the user!
1511                                 wfDebug( "Attempt to preload incompatible content: " .
1512                                         "can't convert " . $content->getModel() .
1513                                         " to " . $handler->getModelID() );
1514
1515                                 return $handler->makeEmptyContent();
1516                         }
1517
1518                         $content = $converted;
1519                 }
1520
1521                 return $content->preloadTransform( $title, $parserOptions, $params );
1522         }
1523
1524         /**
1525          * Verify if a given title exists and the given user is allowed to view it
1526          *
1527          * @see EditPage::getPreloadedContent()
1528          * @param Title|null $title
1529          * @param User $user
1530          * @return bool
1531          * @throws Exception
1532          */
1533         private function isPageExistingAndViewable( $title, User $user ) {
1534                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1535
1536                 return $title && $title->exists() && $permissionManager->userCan( 'read', $user, $title );
1537         }
1538
1539         /**
1540          * Make sure the form isn't faking a user's credentials.
1541          *
1542          * @param WebRequest &$request
1543          * @return bool
1544          * @private
1545          */
1546         public function tokenOk( &$request ) {
1547                 $token = $request->getVal( 'wpEditToken' );
1548                 $user = $this->context->getUser();
1549                 $this->mTokenOk = $user->matchEditToken( $token );
1550                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1551                 return $this->mTokenOk;
1552         }
1553
1554         /**
1555          * Sets post-edit cookie indicating the user just saved a particular revision.
1556          *
1557          * This uses a temporary cookie for each revision ID so separate saves will never
1558          * interfere with each other.
1559          *
1560          * Article::view deletes the cookie on server-side after the redirect and
1561          * converts the value to the global JavaScript variable wgPostEdit.
1562          *
1563          * If the variable were set on the server, it would be cached, which is unwanted
1564          * since the post-edit state should only apply to the load right after the save.
1565          *
1566          * @param int $statusValue The status value (to check for new article status)
1567          */
1568         protected function setPostEditCookie( $statusValue ) {
1569                 $revisionId = $this->page->getLatest();
1570                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1571
1572                 $val = 'saved';
1573                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1574                         $val = 'created';
1575                 } elseif ( $this->oldid ) {
1576                         $val = 'restored';
1577                 }
1578
1579                 $response = $this->context->getRequest()->response();
1580                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1581         }
1582
1583         /**
1584          * Attempt submission
1585          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1586          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1587          * @return Status The resulting status object.
1588          */
1589         public function attemptSave( &$resultDetails = false ) {
1590                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1591                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1592                 // This is needed since PageUpdater no longer checks these rights!
1593
1594                 // Allow bots to exempt some edits from bot flagging
1595                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1596                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1597
1598                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1599
1600                 return $status;
1601         }
1602
1603         /**
1604          * Log when a page was successfully saved after the edit conflict view
1605          */
1606         private function incrementResolvedConflicts() {
1607                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1608                         return;
1609                 }
1610
1611                 $this->getEditConflictHelper()->incrementResolvedStats();
1612         }
1613
1614         /**
1615          * Handle status, such as after attempt save
1616          *
1617          * @param Status $status
1618          * @param array|bool $resultDetails
1619          *
1620          * @throws ErrorPageError
1621          * @return bool False, if output is done, true if rest of the form should be displayed
1622          */
1623         private function handleStatus( Status $status, $resultDetails ) {
1624                 /**
1625                  * @todo FIXME: once the interface for internalAttemptSave() is made
1626                  *   nicer, this should use the message in $status
1627                  */
1628                 if ( $status->value == self::AS_SUCCESS_UPDATE
1629                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1630                 ) {
1631                         $this->incrementResolvedConflicts();
1632
1633                         $this->didSave = true;
1634                         if ( !$resultDetails['nullEdit'] ) {
1635                                 $this->setPostEditCookie( $status->value );
1636                         }
1637                 }
1638
1639                 $out = $this->context->getOutput();
1640
1641                 // "wpExtraQueryRedirect" is a hidden input to modify
1642                 // after save URL and is not used by actual edit form
1643                 $request = $this->context->getRequest();
1644                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1645
1646                 switch ( $status->value ) {
1647                         case self::AS_HOOK_ERROR_EXPECTED:
1648                         case self::AS_CONTENT_TOO_BIG:
1649                         case self::AS_ARTICLE_WAS_DELETED:
1650                         case self::AS_CONFLICT_DETECTED:
1651                         case self::AS_SUMMARY_NEEDED:
1652                         case self::AS_TEXTBOX_EMPTY:
1653                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1654                         case self::AS_END:
1655                         case self::AS_BLANK_ARTICLE:
1656                         case self::AS_SELF_REDIRECT:
1657                                 return true;
1658
1659                         case self::AS_HOOK_ERROR:
1660                                 return false;
1661
1662                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1663                         case self::AS_PARSE_ERROR:
1664                         case self::AS_UNICODE_NOT_SUPPORTED:
1665                                 $out->wrapWikiTextAsInterface( 'error', $status->getWikiText() );
1666                                 return true;
1667
1668                         case self::AS_SUCCESS_NEW_ARTICLE:
1669                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1670                                 if ( $extraQueryRedirect ) {
1671                                         if ( $query !== '' ) {
1672                                                 $query .= '&';
1673                                         }
1674                                         $query .= $extraQueryRedirect;
1675                                 }
1676                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1677                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1678                                 return false;
1679
1680                         case self::AS_SUCCESS_UPDATE:
1681                                 $extraQuery = '';
1682                                 $sectionanchor = $resultDetails['sectionanchor'];
1683
1684                                 // Give extensions a chance to modify URL query on update
1685                                 Hooks::run(
1686                                         'ArticleUpdateBeforeRedirect',
1687                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1688                                 );
1689
1690                                 if ( $resultDetails['redirect'] ) {
1691                                         if ( $extraQuery !== '' ) {
1692                                                 $extraQuery = '&' . $extraQuery;
1693                                         }
1694                                         $extraQuery = 'redirect=no' . $extraQuery;
1695                                 }
1696                                 if ( $extraQueryRedirect ) {
1697                                         if ( $extraQuery !== '' ) {
1698                                                 $extraQuery .= '&';
1699                                         }
1700                                         $extraQuery .= $extraQueryRedirect;
1701                                 }
1702
1703                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1704                                 return false;
1705
1706                         case self::AS_SPAM_ERROR:
1707                                 $this->spamPageWithContent( $resultDetails['spam'] );
1708                                 return false;
1709
1710                         case self::AS_BLOCKED_PAGE_FOR_USER:
1711                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1712
1713                         case self::AS_IMAGE_REDIRECT_ANON:
1714                         case self::AS_IMAGE_REDIRECT_LOGGED:
1715                                 throw new PermissionsError( 'upload' );
1716
1717                         case self::AS_READ_ONLY_PAGE_ANON:
1718                         case self::AS_READ_ONLY_PAGE_LOGGED:
1719                                 throw new PermissionsError( 'edit' );
1720
1721                         case self::AS_READ_ONLY_PAGE:
1722                                 throw new ReadOnlyError;
1723
1724                         case self::AS_RATE_LIMITED:
1725                                 throw new ThrottledError();
1726
1727                         case self::AS_NO_CREATE_PERMISSION:
1728                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1729                                 throw new PermissionsError( $permission );
1730
1731                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1732                                 throw new PermissionsError( 'editcontentmodel' );
1733
1734                         default:
1735                                 // We don't recognize $status->value. The only way that can happen
1736                                 // is if an extension hook aborted from inside ArticleSave.
1737                                 // Render the status object into $this->hookError
1738                                 // FIXME this sucks, we should just use the Status object throughout
1739                                 $this->hookError = '<div class="error">' . "\n" . $status->getWikiText() .
1740                                         '</div>';
1741                                 return true;
1742                 }
1743         }
1744
1745         /**
1746          * Run hooks that can filter edits just before they get saved.
1747          *
1748          * @param Content $content The Content to filter.
1749          * @param Status $status For reporting the outcome to the caller
1750          * @param User $user The user performing the edit
1751          *
1752          * @return bool
1753          */
1754         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1755                 // Run old style post-section-merge edit filter
1756                 if ( $this->hookError != '' ) {
1757                         # ...or the hook could be expecting us to produce an error
1758                         $status->fatal( 'hookaborted' );
1759                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1760                         return false;
1761                 }
1762
1763                 // Run new style post-section-merge edit filter
1764                 if ( !Hooks::run( 'EditFilterMergedContent',
1765                                 [ $this->context, $content, $status, $this->summary,
1766                                 $user, $this->minoredit ] )
1767                 ) {
1768                         # Error messages etc. could be handled within the hook...
1769                         if ( $status->isGood() ) {
1770                                 $status->fatal( 'hookaborted' );
1771                                 // Not setting $this->hookError here is a hack to allow the hook
1772                                 // to cause a return to the edit page without $this->hookError
1773                                 // being set. This is used by ConfirmEdit to display a captcha
1774                                 // without any error message cruft.
1775                         } else {
1776                                 $this->hookError = $this->formatStatusErrors( $status );
1777                         }
1778                         // Use the existing $status->value if the hook set it
1779                         if ( !$status->value ) {
1780                                 $status->value = self::AS_HOOK_ERROR;
1781                         }
1782                         return false;
1783                 } elseif ( !$status->isOK() ) {
1784                         # ...or the hook could be expecting us to produce an error
1785                         // FIXME this sucks, we should just use the Status object throughout
1786                         $this->hookError = $this->formatStatusErrors( $status );
1787                         $status->fatal( 'hookaborted' );
1788                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1789                         return false;
1790                 }
1791
1792                 return true;
1793         }
1794
1795         /**
1796          * Wrap status errors in an errorbox for increased visibility
1797          *
1798          * @param Status $status
1799          * @return string Wikitext
1800          */
1801         private function formatStatusErrors( Status $status ) {
1802                 $errmsg = $status->getWikiText(
1803                         'edit-error-short',
1804                         'edit-error-long',
1805                         $this->context->getLanguage()
1806                 );
1807                 return <<<ERROR
1808 <div class="errorbox">
1809 {$errmsg}
1810 </div>
1811 <br clear="all" />
1812 ERROR;
1813         }
1814
1815         /**
1816          * Return the summary to be used for a new section.
1817          *
1818          * @param string $sectionanchor Set to the section anchor text
1819          * @return string
1820          */
1821         private function newSectionSummary( &$sectionanchor = null ) {
1822                 if ( $this->sectiontitle !== '' ) {
1823                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1824                         // If no edit summary was specified, create one automatically from the section
1825                         // title and have it link to the new section. Otherwise, respect the summary as
1826                         // passed.
1827                         if ( $this->summary === '' ) {
1828                                 $cleanSectionTitle = MediaWikiServices::getInstance()->getParser()
1829                                         ->stripSectionName( $this->sectiontitle );
1830                                 return $this->context->msg( 'newsectionsummary' )
1831                                         ->plaintextParams( $cleanSectionTitle )->inContentLanguage()->text();
1832                         }
1833                 } elseif ( $this->summary !== '' ) {
1834                         $sectionanchor = $this->guessSectionName( $this->summary );
1835                         # This is a new section, so create a link to the new section
1836                         # in the revision summary.
1837                         $cleanSummary = MediaWikiServices::getInstance()->getParser()
1838                                 ->stripSectionName( $this->summary );
1839                         return $this->context->msg( 'newsectionsummary' )
1840                                 ->plaintextParams( $cleanSummary )->inContentLanguage()->text();
1841                 }
1842                 return $this->summary;
1843         }
1844
1845         /**
1846          * Attempt submission (no UI)
1847          *
1848          * @param array &$result Array to add statuses to, currently with the
1849          *   possible keys:
1850          *   - spam (string): Spam string from content if any spam is detected by
1851          *     matchSpamRegex.
1852          *   - sectionanchor (string): Section anchor for a section save.
1853          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1854          *     false otherwise.
1855          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1856          *     revision is a redirect.
1857          * @param bool $bot True if edit is being made under the bot right.
1858          *
1859          * @return Status Status object, possibly with a message, but always with
1860          *   one of the AS_* constants in $status->value,
1861          *
1862          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1863          *   various error display idiosyncrasies. There are also lots of cases
1864          *   where error metadata is set in the object and retrieved later instead
1865          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1866          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1867          * time.
1868          */
1869         public function internalAttemptSave( &$result, $bot = false ) {
1870                 $status = Status::newGood();
1871                 $user = $this->context->getUser();
1872
1873                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1874                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1875                         $status->fatal( 'hookaborted' );
1876                         $status->value = self::AS_HOOK_ERROR;
1877                         return $status;
1878                 }
1879
1880                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1881                         $status->fatal( 'unicode-support-fail' );
1882                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1883                         return $status;
1884                 }
1885
1886                 $request = $this->context->getRequest();
1887                 $spam = $request->getText( 'wpAntispam' );
1888                 if ( $spam !== '' ) {
1889                         wfDebugLog(
1890                                 'SimpleAntiSpam',
1891                                 $user->getName() .
1892                                 ' editing "' .
1893                                 $this->mTitle->getPrefixedText() .
1894                                 '" submitted bogus field "' .
1895                                 $spam .
1896                                 '"'
1897                         );
1898                         $status->fatal( 'spamprotectionmatch', false );
1899                         $status->value = self::AS_SPAM_ERROR;
1900                         return $status;
1901                 }
1902
1903                 try {
1904                         # Construct Content object
1905                         $textbox_content = $this->toEditContent( $this->textbox1 );
1906                 } catch ( MWContentSerializationException $ex ) {
1907                         $status->fatal(
1908                                 'content-failed-to-parse',
1909                                 $this->contentModel,
1910                                 $this->contentFormat,
1911                                 $ex->getMessage()
1912                         );
1913                         $status->value = self::AS_PARSE_ERROR;
1914                         return $status;
1915                 }
1916
1917                 # Check image redirect
1918                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1919                         $textbox_content->isRedirect() &&
1920                         !$user->isAllowed( 'upload' )
1921                 ) {
1922                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1923                                 $status->setResult( false, $code );
1924
1925                                 return $status;
1926                 }
1927
1928                 # Check for spam
1929                 $match = self::matchSummarySpamRegex( $this->summary );
1930                 if ( $match === false && $this->section == 'new' ) {
1931                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1932                         # regular summaries, it is added to the actual wikitext.
1933                         if ( $this->sectiontitle !== '' ) {
1934                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1935                                 $match = self::matchSpamRegex( $this->sectiontitle );
1936                         } else {
1937                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1938                                 # is used with the 'summary' parameter.
1939                                 $match = self::matchSpamRegex( $this->summary );
1940                         }
1941                 }
1942                 if ( $match === false ) {
1943                         $match = self::matchSpamRegex( $this->textbox1 );
1944                 }
1945                 if ( $match !== false ) {
1946                         $result['spam'] = $match;
1947                         $ip = $request->getIP();
1948                         $pdbk = $this->mTitle->getPrefixedDBkey();
1949                         $match = str_replace( "\n", '', $match );
1950                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1951                         $status->fatal( 'spamprotectionmatch', $match );
1952                         $status->value = self::AS_SPAM_ERROR;
1953                         return $status;
1954                 }
1955                 if ( !Hooks::run(
1956                         'EditFilter',
1957                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1958                 ) {
1959                         # Error messages etc. could be handled within the hook...
1960                         $status->fatal( 'hookaborted' );
1961                         $status->value = self::AS_HOOK_ERROR;
1962                         return $status;
1963                 } elseif ( $this->hookError != '' ) {
1964                         # ...or the hook could be expecting us to produce an error
1965                         $status->fatal( 'hookaborted' );
1966                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1967                         return $status;
1968                 }
1969
1970                 if ( $user->isBlockedFrom( $this->mTitle ) ) {
1971                         // Auto-block user's IP if the account was "hard" blocked
1972                         if ( !wfReadOnly() ) {
1973                                 $user->spreadAnyEditBlock();
1974                         }
1975                         # Check block state against master, thus 'false'.
1976                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1977                         return $status;
1978                 }
1979
1980                 $this->contentLength = strlen( $this->textbox1 );
1981                 $config = $this->context->getConfig();
1982                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1983                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1984                         // Error will be displayed by showEditForm()
1985                         $this->tooBig = true;
1986                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1987                         return $status;
1988                 }
1989
1990                 if ( !$user->isAllowed( 'edit' ) ) {
1991                         if ( $user->isAnon() ) {
1992                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1993                                 return $status;
1994                         } else {
1995                                 $status->fatal( 'readonlytext' );
1996                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1997                                 return $status;
1998                         }
1999                 }
2000
2001                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
2002
2003                 $changingContentModel = false;
2004                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
2005                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
2006                                 $status->fatal( 'editpage-cannot-use-custom-model' );
2007                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
2008                                 return $status;
2009                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
2010                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2011                                 return $status;
2012                         }
2013                         // Make sure the user can edit the page under the new content model too
2014                         $titleWithNewContentModel = clone $this->mTitle;
2015                         $titleWithNewContentModel->setContentModel( $this->contentModel );
2016
2017                         $canEditModel = $permissionManager->userCan(
2018                                 'editcontentmodel',
2019                                 $user,
2020                                 $titleWithNewContentModel
2021                         );
2022
2023                         if (
2024                                 !$canEditModel
2025                                 || !$permissionManager->userCan( 'edit', $user, $titleWithNewContentModel )
2026                         ) {
2027                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2028
2029                                 return $status;
2030                         }
2031
2032                         $changingContentModel = true;
2033                         $oldContentModel = $this->mTitle->getContentModel();
2034                 }
2035
2036                 if ( $this->changeTags ) {
2037                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
2038                                 $this->changeTags, $user );
2039                         if ( !$changeTagsStatus->isOK() ) {
2040                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
2041                                 return $changeTagsStatus;
2042                         }
2043                 }
2044
2045                 if ( wfReadOnly() ) {
2046                         $status->fatal( 'readonlytext' );
2047                         $status->value = self::AS_READ_ONLY_PAGE;
2048                         return $status;
2049                 }
2050                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
2051                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
2052                 ) {
2053                         $status->fatal( 'actionthrottledtext' );
2054                         $status->value = self::AS_RATE_LIMITED;
2055                         return $status;
2056                 }
2057
2058                 # If the article has been deleted while editing, don't save it without
2059                 # confirmation
2060                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
2061                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
2062                         return $status;
2063                 }
2064
2065                 # Load the page data from the master. If anything changes in the meantime,
2066                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2067                 $this->page->loadPageData( 'fromdbmaster' );
2068                 $new = !$this->page->exists();
2069
2070                 if ( $new ) {
2071                         // Late check for create permission, just in case *PARANOIA*
2072                         if ( !$permissionManager->userCan( 'create', $user, $this->mTitle ) ) {
2073                                 $status->fatal( 'nocreatetext' );
2074                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2075                                 wfDebug( __METHOD__ . ": no create permission\n" );
2076                                 return $status;
2077                         }
2078
2079                         // Don't save a new page if it's blank or if it's a MediaWiki:
2080                         // message with content equivalent to default (allow empty pages
2081                         // in this case to disable messages, see T52124)
2082                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2083                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2084                                 $defaultText = $defaultMessageText;
2085                         } else {
2086                                 $defaultText = '';
2087                         }
2088
2089                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2090                                 $this->blankArticle = true;
2091                                 $status->fatal( 'blankarticle' );
2092                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2093                                 return $status;
2094                         }
2095
2096                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2097                                 return $status;
2098                         }
2099
2100                         $content = $textbox_content;
2101
2102                         $result['sectionanchor'] = '';
2103                         if ( $this->section == 'new' ) {
2104                                 if ( $this->sectiontitle !== '' ) {
2105                                         // Insert the section title above the content.
2106                                         $content = $content->addSectionHeader( $this->sectiontitle );
2107                                 } elseif ( $this->summary !== '' ) {
2108                                         // Insert the section title above the content.
2109                                         $content = $content->addSectionHeader( $this->summary );
2110                                 }
2111                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2112                         }
2113
2114                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2115
2116                 } else { # not $new
2117
2118                         # Article exists. Check for edit conflict.
2119
2120                         $this->page->clear(); # Force reload of dates, etc.
2121                         $timestamp = $this->page->getTimestamp();
2122                         $latest = $this->page->getLatest();
2123
2124                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2125
2126                         // An edit conflict is detected if the current revision is different from the
2127                         // revision that was current when editing was initiated on the client.
2128                         // This is checked based on the timestamp and revision ID.
2129                         // TODO: the timestamp based check can probably go away now.
2130                         if ( $timestamp != $this->edittime
2131                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2132                         ) {
2133                                 $this->isConflict = true;
2134                                 if ( $this->section == 'new' ) {
2135                                         if ( $this->page->getUserText() == $user->getName() &&
2136                                                 $this->page->getComment() == $this->newSectionSummary()
2137                                         ) {
2138                                                 // Probably a duplicate submission of a new comment.
2139                                                 // This can happen when CDN resends a request after
2140                                                 // a timeout but the first one actually went through.
2141                                                 wfDebug( __METHOD__
2142                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2143                                         } else {
2144                                                 // New comment; suppress conflict.
2145                                                 $this->isConflict = false;
2146                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2147                                         }
2148                                 } elseif ( $this->section == ''
2149                                         && Revision::userWasLastToEdit(
2150                                                 DB_MASTER, $this->mTitle->getArticleID(),
2151                                                 $user->getId(), $this->edittime
2152                                         )
2153                                 ) {
2154                                         # Suppress edit conflict with self, except for section edits where merging is required.
2155                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2156                                         $this->isConflict = false;
2157                                 }
2158                         }
2159
2160                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2161                         if ( $this->sectiontitle !== '' ) {
2162                                 $sectionTitle = $this->sectiontitle;
2163                         } else {
2164                                 $sectionTitle = $this->summary;
2165                         }
2166
2167                         $content = null;
2168
2169                         if ( $this->isConflict ) {
2170                                 wfDebug( __METHOD__
2171                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2172                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2173                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2174                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2175                                 if ( $this->editRevId !== null ) {
2176                                         $content = $this->page->replaceSectionAtRev(
2177                                                 $this->section,
2178                                                 $textbox_content,
2179                                                 $sectionTitle,
2180                                                 $this->editRevId
2181                                         );
2182                                 } else {
2183                                         $content = $this->page->replaceSectionContent(
2184                                                 $this->section,
2185                                                 $textbox_content,
2186                                                 $sectionTitle,
2187                                                 $this->edittime
2188                                         );
2189                                 }
2190                         } else {
2191                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2192                                 $content = $this->page->replaceSectionContent(
2193                                         $this->section,
2194                                         $textbox_content,
2195                                         $sectionTitle
2196                                 );
2197                         }
2198
2199                         if ( is_null( $content ) ) {
2200                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2201                                 $this->isConflict = true;
2202                                 $content = $textbox_content; // do not try to merge here!
2203                         } elseif ( $this->isConflict ) {
2204                                 # Attempt merge
2205                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2206                                         // Successful merge! Maybe we should tell the user the good news?
2207                                         $this->isConflict = false;
2208                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2209                                 } else {
2210                                         $this->section = '';
2211                                         $this->textbox1 = ContentHandler::getContentText( $content );
2212                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2213                                 }
2214                         }
2215
2216                         if ( $this->isConflict ) {
2217                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2218                                 return $status;
2219                         }
2220
2221                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2222                                 return $status;
2223                         }
2224
2225                         if ( $this->section == 'new' ) {
2226                                 // Handle the user preference to force summaries here
2227                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2228                                         $this->missingSummary = true;
2229                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2230                                         $status->value = self::AS_SUMMARY_NEEDED;
2231                                         return $status;
2232                                 }
2233
2234                                 // Do not allow the user to post an empty comment
2235                                 if ( $this->textbox1 == '' ) {
2236                                         $this->missingComment = true;
2237                                         $status->fatal( 'missingcommenttext' );
2238                                         $status->value = self::AS_TEXTBOX_EMPTY;
2239                                         return $status;
2240                                 }
2241                         } elseif ( !$this->allowBlankSummary
2242                                 && !$content->equals( $this->getOriginalContent( $user ) )
2243                                 && !$content->isRedirect()
2244                                 && md5( $this->summary ) == $this->autoSumm
2245                         ) {
2246                                 $this->missingSummary = true;
2247                                 $status->fatal( 'missingsummary' );
2248                                 $status->value = self::AS_SUMMARY_NEEDED;
2249                                 return $status;
2250                         }
2251
2252                         # All's well
2253                         $sectionanchor = '';
2254                         if ( $this->section == 'new' ) {
2255                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2256                         } elseif ( $this->section != '' ) {
2257                                 # Try to get a section anchor from the section source, redirect
2258                                 # to edited section if header found.
2259                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2260                                 # for duplicate heading checking and maybe parsing.
2261                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2262                                 # We can't deal with anchors, includes, html etc in the header for now,
2263                                 # headline would need to be parsed to improve this.
2264                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2265                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2266                                 }
2267                         }
2268                         $result['sectionanchor'] = $sectionanchor;
2269
2270                         // Save errors may fall down to the edit form, but we've now
2271                         // merged the section into full text. Clear the section field
2272                         // so that later submission of conflict forms won't try to
2273                         // replace that into a duplicated mess.
2274                         $this->textbox1 = $this->toEditText( $content );
2275                         $this->section = '';
2276
2277                         $status->value = self::AS_SUCCESS_UPDATE;
2278                 }
2279
2280                 if ( !$this->allowSelfRedirect
2281                         && $content->isRedirect()
2282                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2283                 ) {
2284                         // If the page already redirects to itself, don't warn.
2285                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2286                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2287                                 $this->selfRedirect = true;
2288                                 $status->fatal( 'selfredirect' );
2289                                 $status->value = self::AS_SELF_REDIRECT;
2290                                 return $status;
2291                         }
2292                 }
2293
2294                 // Check for length errors again now that the section is merged in
2295                 $this->contentLength = strlen( $this->toEditText( $content ) );
2296                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2297                         $this->tooBig = true;
2298                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2299                         return $status;
2300                 }
2301
2302                 $flags = EDIT_AUTOSUMMARY |
2303                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2304                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2305                         ( $bot ? EDIT_FORCE_BOT : 0 );
2306
2307                 $doEditStatus = $this->page->doEditContent(
2308                         $content,
2309                         $this->summary,
2310                         $flags,
2311                         false,
2312                         $user,
2313                         $content->getDefaultFormat(),
2314                         $this->changeTags,
2315                         $this->undidRev
2316                 );
2317
2318                 if ( !$doEditStatus->isOK() ) {
2319                         // Failure from doEdit()
2320                         // Show the edit conflict page for certain recognized errors from doEdit(),
2321                         // but don't show it for errors from extension hooks
2322                         $errors = $doEditStatus->getErrorsArray();
2323                         if ( in_array( $errors[0][0],
2324                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2325                         ) {
2326                                 $this->isConflict = true;
2327                                 // Destroys data doEdit() put in $status->value but who cares
2328                                 $doEditStatus->value = self::AS_END;
2329                         }
2330                         return $doEditStatus;
2331                 }
2332
2333                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2334                 if ( $result['nullEdit'] ) {
2335                         // We don't know if it was a null edit until now, so increment here
2336                         $user->pingLimiter( 'linkpurge' );
2337                 }
2338                 $result['redirect'] = $content->isRedirect();
2339
2340                 $this->updateWatchlist();
2341
2342                 // If the content model changed, add a log entry
2343                 if ( $changingContentModel ) {
2344                         $this->addContentModelChangeLogEntry(
2345                                 $user,
2346                                 $new ? false : $oldContentModel,
2347                                 $this->contentModel,
2348                                 $this->summary
2349                         );
2350                 }
2351
2352                 return $status;
2353         }
2354
2355         /**
2356          * @param User $user
2357          * @param string|false $oldModel false if the page is being newly created
2358          * @param string $newModel
2359          * @param string $reason
2360          */
2361         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2362                 $new = $oldModel === false;
2363                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2364                 $log->setPerformer( $user );
2365                 $log->setTarget( $this->mTitle );
2366                 $log->setComment( $reason );
2367                 $log->setParameters( [
2368                         '4::oldmodel' => $oldModel,
2369                         '5::newmodel' => $newModel
2370                 ] );
2371                 $logid = $log->insert();
2372                 $log->publish( $logid );
2373         }
2374
2375         /**
2376          * Register the change of watch status
2377          */
2378         protected function updateWatchlist() {
2379                 $user = $this->context->getUser();
2380                 if ( !$user->isLoggedIn() ) {
2381                         return;
2382                 }
2383
2384                 $title = $this->mTitle;
2385                 $watch = $this->watchthis;
2386                 // Do this in its own transaction to reduce contention...
2387                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2388                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2389                                 return; // nothing to change
2390                         }
2391                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2392                 } );
2393         }
2394
2395         /**
2396          * Attempts to do 3-way merge of edit content with a base revision
2397          * and current content, in case of edit conflict, in whichever way appropriate
2398          * for the content type.
2399          *
2400          * @since 1.21
2401          *
2402          * @param Content $editContent
2403          *
2404          * @return bool
2405          */
2406         private function mergeChangesIntoContent( &$editContent ) {
2407                 $db = wfGetDB( DB_MASTER );
2408
2409                 // This is the revision that was current at the time editing was initiated on the client,
2410                 // even if the edit was based on an old revision.
2411                 $baseRevision = $this->getBaseRevision();
2412                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2413
2414                 if ( is_null( $baseContent ) ) {
2415                         return false;
2416                 }
2417
2418                 // The current state, we want to merge updates into it
2419                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2420                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2421
2422                 if ( is_null( $currentContent ) ) {
2423                         return false;
2424                 }
2425
2426                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2427
2428                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2429
2430                 if ( $result ) {
2431                         $editContent = $result;
2432                         // Update parentRevId to what we just merged.
2433                         $this->parentRevId = $currentRevision->getId();
2434                         return true;
2435                 }
2436
2437                 return false;
2438         }
2439
2440         /**
2441          * Returns the revision that was current at the time editing was initiated on the client,
2442          * even if the edit was based on an old revision.
2443          *
2444          * @warning this method is very poorly named. If the user opened the form with ?oldid=X,
2445          *        one might think of X as the "base revision", which is NOT what this returns,
2446          *        see oldid for that. One might further assume that this corresponds to the $baseRevId
2447          *        parameter of WikiPage::doEditContent, which is not the case either.
2448          *        getExpectedParentRevision() would perhaps be a better name.
2449          *
2450          * @return Revision|null Current version when editing was initiated on the client
2451          */
2452         public function getBaseRevision() {
2453                 if ( !$this->mBaseRevision ) {
2454                         $db = wfGetDB( DB_MASTER );
2455                         $this->mBaseRevision = $this->editRevId
2456                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2457                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2458                 }
2459                 return $this->mBaseRevision;
2460         }
2461
2462         /**
2463          * Check given input text against $wgSpamRegex, and return the text of the first match.
2464          *
2465          * @param string $text
2466          *
2467          * @return string|bool Matching string or false
2468          */
2469         public static function matchSpamRegex( $text ) {
2470                 global $wgSpamRegex;
2471                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2472                 $regexes = (array)$wgSpamRegex;
2473                 return self::matchSpamRegexInternal( $text, $regexes );
2474         }
2475
2476         /**
2477          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2478          *
2479          * @param string $text
2480          *
2481          * @return string|bool Matching string or false
2482          */
2483         public static function matchSummarySpamRegex( $text ) {
2484                 global $wgSummarySpamRegex;
2485                 $regexes = (array)$wgSummarySpamRegex;
2486                 return self::matchSpamRegexInternal( $text, $regexes );
2487         }
2488
2489         /**
2490          * @param string $text
2491          * @param array $regexes
2492          * @return bool|string
2493          */
2494         protected static function matchSpamRegexInternal( $text, $regexes ) {
2495                 foreach ( $regexes as $regex ) {
2496                         $matches = [];
2497                         if ( preg_match( $regex, $text, $matches ) ) {
2498                                 return $matches[0];
2499                         }
2500                 }
2501                 return false;
2502         }
2503
2504         public function setHeaders() {
2505                 $out = $this->context->getOutput();
2506
2507                 $out->addModules( 'mediawiki.action.edit' );
2508                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2509                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2510
2511                 $user = $this->context->getUser();
2512
2513                 if ( $user->getOption( 'uselivepreview' ) ) {
2514                         $out->addModules( 'mediawiki.action.edit.preview' );
2515                 }
2516
2517                 if ( $user->getOption( 'useeditwarning' ) ) {
2518                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2519                 }
2520
2521                 # Enabled article-related sidebar, toplinks, etc.
2522                 $out->setArticleRelated( true );
2523
2524                 $contextTitle = $this->getContextTitle();
2525                 if ( $this->isConflict ) {
2526                         $msg = 'editconflict';
2527                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2528                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2529                 } else {
2530                         $msg = $contextTitle->exists()
2531                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2532                                         && $contextTitle->getDefaultMessageText() !== false
2533                                 )
2534                                 ? 'editing'
2535                                 : 'creating';
2536                 }
2537
2538                 # Use the title defined by DISPLAYTITLE magic word when present
2539                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2540                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2541                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2542                 if ( $displayTitle === false ) {
2543                         $displayTitle = $contextTitle->getPrefixedText();
2544                 } else {
2545                         $out->setDisplayTitle( $displayTitle );
2546                 }
2547                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2548
2549                 $config = $this->context->getConfig();
2550
2551                 # Transmit the name of the message to JavaScript for live preview
2552                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2553                 $out->addJsConfigVars( [
2554                         'wgEditMessage' => $msg,
2555                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2556                 ] );
2557
2558                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2559                 // editors, etc.
2560                 $out->addJsConfigVars(
2561                         'wgEditSubmitButtonLabelPublish',
2562                         $config->get( 'EditSubmitButtonLabelPublish' )
2563                 );
2564         }
2565
2566         /**
2567          * Show all applicable editing introductions
2568          */
2569         protected function showIntro() {
2570                 if ( $this->suppressIntro ) {
2571                         return;
2572                 }
2573
2574                 $out = $this->context->getOutput();
2575                 $namespace = $this->mTitle->getNamespace();
2576
2577                 if ( $namespace == NS_MEDIAWIKI ) {
2578                         # Show a warning if editing an interface message
2579                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2580                         # If this is a default message (but not css, json, or js),
2581                         # show a hint that it is translatable on translatewiki.net
2582                         if (
2583                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2584                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2585                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2586                         ) {
2587                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2588                                 if ( $defaultMessageText !== false ) {
2589                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2590                                                 'translateinterface' );
2591                                 }
2592                         }
2593                 } elseif ( $namespace == NS_FILE ) {
2594                         # Show a hint to shared repo
2595                         $file = MediaWikiServices::getInstance()->getRepoGroup()->findFile( $this->mTitle );
2596                         if ( $file && !$file->isLocal() ) {
2597                                 $descUrl = $file->getDescriptionUrl();
2598                                 # there must be a description url to show a hint to shared repo
2599                                 if ( $descUrl ) {
2600                                         if ( !$this->mTitle->exists() ) {
2601                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2602                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2603                                                 ] );
2604                                         } else {
2605                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2606                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2607                                                 ] );
2608                                         }
2609                                 }
2610                         }
2611                 }
2612
2613                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2614                 # Show log extract when the user is currently blocked
2615                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2616                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2617                         $user = User::newFromName( $username, false /* allow IP users */ );
2618                         $ip = User::isIP( $username );
2619                         $block = DatabaseBlock::newFromTarget( $user, $user );
2620                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2621                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2622                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2623                         } elseif (
2624                                 !is_null( $block ) &&
2625                                 $block->getType() != DatabaseBlock::TYPE_AUTO &&
2626                                 ( $block->isSitewide() || $user->isBlockedFrom( $this->mTitle ) )
2627                         ) {
2628                                 // Show log extract if the user is sitewide blocked or is partially
2629                                 // blocked and not allowed to edit their user page or user talk page
2630                                 LogEventsList::showLogExtract(
2631                                         $out,
2632                                         'block',
2633                                         MediaWikiServices::getInstance()->getNamespaceInfo()->
2634                                                 getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2635                                         '',
2636                                         [
2637                                                 'lim' => 1,
2638                                                 'showIfEmpty' => false,
2639                                                 'msgKey' => [
2640                                                         'blocked-notice-logextract',
2641                                                         $user->getName() # Support GENDER in notice
2642                                                 ]
2643                                         ]
2644                                 );
2645                         }
2646                 }
2647                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2648                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2649                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2650                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2651                         ) );
2652                         if ( $this->context->getUser()->isLoggedIn() ) {
2653                                 $out->wrapWikiMsg(
2654                                         // Suppress the external link icon, consider the help url an internal one
2655                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2656                                         [
2657                                                 'newarticletext',
2658                                                 $helpLink
2659                                         ]
2660                                 );
2661                         } else {
2662                                 $out->wrapWikiMsg(
2663                                         // Suppress the external link icon, consider the help url an internal one
2664                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2665                                         [
2666                                                 'newarticletextanon',
2667                                                 $helpLink
2668                                         ]
2669                                 );
2670                         }
2671                 }
2672                 # Give a notice if the user is editing a deleted/moved page...
2673                 if ( !$this->mTitle->exists() ) {
2674                         $dbr = wfGetDB( DB_REPLICA );
2675
2676                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2677                                 '',
2678                                 [
2679                                         'lim' => 10,
2680                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2681                                         'showIfEmpty' => false,
2682                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2683                                 ]
2684                         );
2685                 }
2686         }
2687
2688         /**
2689          * Attempt to show a custom editing introduction, if supplied
2690          *
2691          * @return bool
2692          */
2693         protected function showCustomIntro() {
2694                 if ( $this->editintro ) {
2695                         $title = Title::newFromText( $this->editintro );
2696                         if ( $this->isPageExistingAndViewable( $title, $this->context->getUser() ) ) {
2697                                 // Added using template syntax, to take <noinclude>'s into account.
2698                                 $this->context->getOutput()->addWikiTextAsContent(
2699                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2700                                         /*linestart*/true,
2701                                         $this->mTitle
2702                                 );
2703                                 return true;
2704                         }
2705                 }
2706                 return false;
2707         }
2708
2709         /**
2710          * Gets an editable textual representation of $content.
2711          * The textual representation can be turned by into a Content object by the
2712          * toEditContent() method.
2713          *
2714          * If $content is null or false or a string, $content is returned unchanged.
2715          *
2716          * If the given Content object is not of a type that can be edited using
2717          * the text base EditPage, an exception will be raised. Set
2718          * $this->allowNonTextContent to true to allow editing of non-textual
2719          * content.
2720          *
2721          * @param Content|null|bool|string $content
2722          * @return string The editable text form of the content.
2723          *
2724          * @throws MWException If $content is not an instance of TextContent and
2725          *   $this->allowNonTextContent is not true.
2726          */
2727         protected function toEditText( $content ) {
2728                 if ( $content === null || $content === false || is_string( $content ) ) {
2729                         return $content;
2730                 }
2731
2732                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2733                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2734                 }
2735
2736                 return $content->serialize( $this->contentFormat );
2737         }
2738
2739         /**
2740          * Turns the given text into a Content object by unserializing it.
2741          *
2742          * If the resulting Content object is not of a type that can be edited using
2743          * the text base EditPage, an exception will be raised. Set
2744          * $this->allowNonTextContent to true to allow editing of non-textual
2745          * content.
2746          *
2747          * @param string|null|bool $text Text to unserialize
2748          * @return Content|bool|null The content object created from $text. If $text was false
2749          *   or null, then false or null will be returned instead.
2750          *
2751          * @throws MWException If unserializing the text results in a Content
2752          *   object that is not an instance of TextContent and
2753          *   $this->allowNonTextContent is not true.
2754          */
2755         protected function toEditContent( $text ) {
2756                 if ( $text === false || $text === null ) {
2757                         return $text;
2758                 }
2759
2760                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2761                         $this->contentModel, $this->contentFormat );
2762
2763                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2764                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2765                 }
2766
2767                 return $content;
2768         }
2769
2770         /**
2771          * Send the edit form and related headers to OutputPage
2772          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2773          *     during form output near the top, for captchas and the like.
2774          *
2775          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2776          * use the EditPage::showEditForm:fields hook instead.
2777          */
2778         public function showEditForm( $formCallback = null ) {
2779                 # need to parse the preview early so that we know which templates are used,
2780                 # otherwise users with "show preview after edit box" will get a blank list
2781                 # we parse this near the beginning so that setHeaders can do the title
2782                 # setting work instead of leaving it in getPreviewText
2783                 $previewOutput = '';
2784                 if ( $this->formtype == 'preview' ) {
2785                         $previewOutput = $this->getPreviewText();
2786                 }
2787
2788                 $out = $this->context->getOutput();
2789
2790                 // Avoid PHP 7.1 warning of passing $this by reference
2791                 $editPage = $this;
2792                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2793
2794                 $this->setHeaders();
2795
2796                 $this->addTalkPageText();
2797                 $this->addEditNotices();
2798
2799                 if ( !$this->isConflict &&
2800                         $this->section != '' &&
2801                         !$this->isSectionEditSupported() ) {
2802                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2803                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2804                         // Someone is welcome to try refactoring though
2805                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2806                         return;
2807                 }
2808
2809                 $this->showHeader();
2810
2811                 $out->addHTML( $this->editFormPageTop );
2812
2813                 $user = $this->context->getUser();
2814                 if ( $user->getOption( 'previewontop' ) ) {
2815                         $this->displayPreviewArea( $previewOutput, true );
2816                 }
2817
2818                 $out->addHTML( $this->editFormTextTop );
2819
2820                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype !== 'save' ) {
2821                         $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2822                                 'deletedwhileediting' );
2823                 }
2824
2825                 // @todo add EditForm plugin interface and use it here!
2826                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2827                 $out->addHTML( Html::openElement(
2828                         'form',
2829                         [
2830                                 'class' => 'mw-editform',
2831                                 'id' => self::EDITFORM_ID,
2832                                 'name' => self::EDITFORM_ID,
2833                                 'method' => 'post',
2834                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2835                                 'enctype' => 'multipart/form-data'
2836                         ]
2837                 ) );
2838
2839                 if ( is_callable( $formCallback ) ) {
2840                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2841                         call_user_func_array( $formCallback, [ &$out ] );
2842                 }
2843
2844                 // Add a check for Unicode support
2845                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2846
2847                 // Add an empty field to trip up spambots
2848                 $out->addHTML(
2849                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2850                         . Html::rawElement(
2851                                 'label',
2852                                 [ 'for' => 'wpAntispam' ],
2853                                 $this->context->msg( 'simpleantispam-label' )->parse()
2854                         )
2855                         . Xml::element(
2856                                 'input',
2857                                 [
2858                                         'type' => 'text',
2859                                         'name' => 'wpAntispam',
2860                                         'id' => 'wpAntispam',
2861                                         'value' => ''
2862                                 ]
2863                         )
2864                         . Xml::closeElement( 'div' )
2865                 );
2866
2867                 // Avoid PHP 7.1 warning of passing $this by reference
2868                 $editPage = $this;
2869                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2870
2871                 // Put these up at the top to ensure they aren't lost on early form submission
2872                 $this->showFormBeforeText();
2873
2874                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2875                         $username = $this->lastDelete->user_name;
2876                         $comment = CommentStore::getStore()
2877                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2878
2879                         // It is better to not parse the comment at all than to have templates expanded in the middle
2880                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2881                         $key = $comment === ''
2882                                 ? 'confirmrecreate-noreason'
2883                                 : 'confirmrecreate';
2884                         $out->addHTML(
2885                                 '<div class="mw-confirm-recreate">' .
2886                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2887                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2888                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2889                                 ) .
2890                                 '</div>'
2891                         );
2892                 }
2893
2894                 # When the summary is hidden, also hide them on preview/show changes
2895                 if ( $this->nosummary ) {
2896                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2897                 }
2898
2899                 # If a blank edit summary was previously provided, and the appropriate
2900                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2901                 # user being bounced back more than once in the event that a summary
2902                 # is not required.
2903                 # ####
2904                 # For a bit more sophisticated detection of blank summaries, hash the
2905                 # automatic one and pass that in the hidden field wpAutoSummary.
2906                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2907                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2908                 }
2909
2910                 if ( $this->undidRev ) {
2911                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2912                 }
2913
2914                 if ( $this->selfRedirect ) {
2915                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2916                 }
2917
2918                 if ( $this->hasPresetSummary ) {
2919                         // If a summary has been preset using &summary= we don't want to prompt for
2920                         // a different summary. Only prompt for a summary if the summary is blanked.
2921                         // (T19416)
2922                         $this->autoSumm = md5( '' );
2923                 }
2924
2925                 $autosumm = $this->autoSumm !== '' ? $this->autoSumm : md5( $this->summary );
2926                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2927
2928                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2929                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2930
2931                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2932                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2933
2934                 $out->enableOOUI();
2935
2936                 if ( $this->section == 'new' ) {
2937                         $this->showSummaryInput( true, $this->summary );
2938                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2939                 }
2940
2941                 $out->addHTML( $this->editFormTextBeforeContent );
2942                 if ( $this->isConflict ) {
2943                         // In an edit conflict, we turn textbox2 into the user's text,
2944                         // and textbox1 into the stored version
2945                         $this->textbox2 = $this->textbox1;
2946
2947                         $content = $this->getCurrentContent();
2948                         $this->textbox1 = $this->toEditText( $content );
2949
2950                         $editConflictHelper = $this->getEditConflictHelper();
2951                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2952                         $editConflictHelper->setContentModel( $this->contentModel );
2953                         $editConflictHelper->setContentFormat( $this->contentFormat );
2954                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2955                 }
2956
2957                 if ( !$this->mTitle->isUserConfigPage() ) {
2958                         $out->addHTML( self::getEditToolbar() );
2959                 }
2960
2961                 if ( $this->blankArticle ) {
2962                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2963                 }
2964
2965                 if ( $this->isConflict ) {
2966                         // In an edit conflict bypass the overridable content form method
2967                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2968                         // resolved between page source edits and custom ui edits using the
2969                         // custom edit ui.
2970                         $conflictTextBoxAttribs = [];
2971                         if ( $this->wasDeletedSinceLastEdit() ) {
2972                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2973                         } elseif ( $this->isOldRev ) {
2974                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2975                         }
2976
2977                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2978                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2979                 } else {
2980                         $this->showContentForm();
2981                 }
2982
2983                 $out->addHTML( $this->editFormTextAfterContent );
2984
2985                 $this->showStandardInputs();
2986
2987                 $this->showFormAfterText();
2988
2989                 $this->showTosSummary();
2990
2991                 $this->showEditTools();
2992
2993                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2994
2995                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2996
2997                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2998                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2999
3000                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
3001                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
3002
3003                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
3004
3005                 if ( $this->isConflict ) {
3006                         try {
3007                                 $this->showConflict();
3008                         } catch ( MWContentSerializationException $ex ) {
3009                                 // this can't really happen, but be nice if it does.
3010                                 $msg = $this->context->msg(
3011                                         'content-failed-to-parse',
3012                                         $this->contentModel,
3013                                         $this->contentFormat,
3014                                         $ex->getMessage()
3015                                 );
3016                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3017                         }
3018                 }
3019
3020                 // Set a hidden field so JS knows what edit form mode we are in
3021                 if ( $this->isConflict ) {
3022                         $mode = 'conflict';
3023                 } elseif ( $this->preview ) {
3024                         $mode = 'preview';
3025                 } elseif ( $this->diff ) {
3026                         $mode = 'diff';
3027                 } else {
3028                         $mode = 'text';
3029                 }
3030                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
3031
3032                 // Marker for detecting truncated form data.  This must be the last
3033                 // parameter sent in order to be of use, so do not move me.
3034                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
3035                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
3036
3037                 if ( !$user->getOption( 'previewontop' ) ) {
3038                         $this->displayPreviewArea( $previewOutput, false );
3039                 }
3040         }
3041
3042         /**
3043          * Wrapper around TemplatesOnThisPageFormatter to make
3044          * a "templates on this page" list.
3045          *
3046          * @param Title[] $templates
3047          * @return string HTML
3048          */
3049         public function makeTemplatesOnThisPageList( array $templates ) {
3050                 $templateListFormatter = new TemplatesOnThisPageFormatter(
3051                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
3052                 );
3053
3054                 // preview if preview, else section if section, else false
3055                 $type = false;
3056                 if ( $this->preview ) {
3057                         $type = 'preview';
3058                 } elseif ( $this->section != '' ) {
3059                         $type = 'section';
3060                 }
3061
3062                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
3063                         $templateListFormatter->format( $templates, $type )
3064                 );
3065         }
3066
3067         /**
3068          * Extract the section title from current section text, if any.
3069          *
3070          * @param string $text
3071          * @return string|bool String or false
3072          */
3073         public static function extractSectionTitle( $text ) {
3074                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
3075                 if ( !empty( $matches[2] ) ) {
3076                         return MediaWikiServices::getInstance()->getParser()
3077                                 ->stripSectionName( trim( $matches[2] ) );
3078                 } else {
3079                         return false;
3080                 }
3081         }
3082
3083         protected function showHeader() {
3084                 $out = $this->context->getOutput();
3085                 $user = $this->context->getUser();
3086                 if ( $this->isConflict ) {
3087                         $this->addExplainConflictHeader( $out );
3088                         $this->editRevId = $this->page->getLatest();
3089                 } else {
3090                         if ( $this->section != '' && $this->section != 'new' && !$this->summary &&
3091                                 !$this->preview && !$this->diff
3092                         ) {
3093                                 $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3094                                 if ( $sectionTitle !== false ) {
3095                                         $this->summary = "/* $sectionTitle */ ";
3096                                 }
3097                         }
3098
3099                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3100
3101                         if ( $this->missingComment ) {
3102                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3103                         }
3104
3105                         if ( $this->missingSummary && $this->section != 'new' ) {
3106                                 $out->wrapWikiMsg(
3107                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3108                                         [ 'missingsummary', $buttonLabel ]
3109                                 );
3110                         }
3111
3112                         if ( $this->missingSummary && $this->section == 'new' ) {
3113                                 $out->wrapWikiMsg(
3114                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3115                                         [ 'missingcommentheader', $buttonLabel ]
3116                                 );
3117                         }
3118
3119                         if ( $this->blankArticle ) {
3120                                 $out->wrapWikiMsg(
3121                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3122                                         [ 'blankarticle', $buttonLabel ]
3123                                 );
3124                         }
3125
3126                         if ( $this->selfRedirect ) {
3127                                 $out->wrapWikiMsg(
3128                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3129                                         [ 'selfredirect', $buttonLabel ]
3130                                 );
3131                         }
3132
3133                         if ( $this->hookError !== '' ) {
3134                                 $out->addWikiTextAsInterface( $this->hookError );
3135                         }
3136
3137                         if ( $this->section != 'new' ) {
3138                                 $revision = $this->mArticle->getRevisionFetched();
3139                                 if ( $revision ) {
3140                                         // Let sysop know that this will make private content public if saved
3141
3142                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3143                                                 $out->wrapWikiMsg(
3144                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3145                                                         'rev-deleted-text-permission'
3146                                                 );
3147                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3148                                                 $out->wrapWikiMsg(
3149                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3150                                                         'rev-deleted-text-view'
3151                                                 );
3152                                         }
3153
3154                                         if ( !$revision->isCurrent() ) {
3155                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3156                                                 $out->wrapWikiMsg(
3157                                                         Html::warningBox( "\n$1\n" ),
3158                                                         'editingold'
3159                                                 );
3160                                                 $this->isOldRev = true;
3161                                         }
3162                                 } elseif ( $this->mTitle->exists() ) {
3163                                         // Something went wrong
3164
3165                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3166                                                 [ 'missing-revision', $this->oldid ] );
3167                                 }
3168                         }
3169                 }
3170
3171                 if ( wfReadOnly() ) {
3172                         $out->wrapWikiMsg(
3173                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3174                                 [ 'readonlywarning', wfReadOnlyReason() ]
3175                         );
3176                 } elseif ( $user->isAnon() ) {
3177                         if ( $this->formtype != 'preview' ) {
3178                                 $returntoquery = array_diff_key(
3179                                         $this->context->getRequest()->getValues(),
3180                                         [ 'title' => true, 'returnto' => true, 'returntoquery' => true ]
3181                                 );
3182                                 $out->wrapWikiMsg(
3183                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3184                                         [ 'anoneditwarning',
3185                                                 // Log-in link
3186                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3187                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3188                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3189                                                 ] ),
3190                                                 // Sign-up link
3191                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3192                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3193                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3194                                                 ] )
3195                                         ]
3196                                 );
3197                         } else {
3198                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3199                                         'anonpreviewwarning'
3200                                 );
3201                         }
3202                 } elseif ( $this->mTitle->isUserConfigPage() ) {
3203                         # Check the skin exists
3204                         if ( $this->isWrongCaseUserConfigPage() ) {
3205                                 $out->wrapWikiMsg(
3206                                         "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3207                                         [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3208                                 );
3209                         }
3210                         if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3211                                 $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3212                                 $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3213                                 $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3214
3215                                 $warning = $isUserCssConfig
3216                                         ? 'usercssispublic'
3217                                         : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3218
3219                                 $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3220
3221                                 if ( $this->formtype !== 'preview' ) {
3222                                         $config = $this->context->getConfig();
3223                                         if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3224                                                 $out->wrapWikiMsg(
3225                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3226                                                         [ 'usercssyoucanpreview' ]
3227                                                 );
3228                                         } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3229                                                 $out->wrapWikiMsg(
3230                                                         "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3231                                                         [ 'userjsonyoucanpreview' ]
3232                                                 );
3233                                         } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3234                                                 $out->wrapWikiMsg(
3235                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3236                                                         [ 'userjsyoucanpreview' ]
3237                                                 );
3238                                         }
3239                                 }
3240                         }
3241                 }
3242
3243                 $this->addPageProtectionWarningHeaders();
3244
3245                 $this->addLongPageWarningHeader();
3246
3247                 # Add header copyright warning
3248                 $this->showHeaderCopyrightWarning();
3249         }
3250
3251         /**
3252          * Helper function for summary input functions, which returns the necessary
3253          * attributes for the input.
3254          *
3255          * @param array|null $inputAttrs Array of attrs to use on the input
3256          * @return array
3257          */
3258         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3259                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3260                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3261                 // Unicode codepoints.
3262                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3263                         'id' => 'wpSummary',
3264                         'name' => 'wpSummary',
3265                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
3266                         'tabindex' => 1,
3267                         'size' => 60,
3268                         'spellcheck' => 'true',
3269                 ];
3270         }
3271
3272         /**
3273          * Builds a standard summary input with a label.
3274          *
3275          * @param string $summary The value of the summary input
3276          * @param string|null $labelText The html to place inside the label
3277          * @param array|null $inputAttrs Array of attrs to use on the input
3278          *
3279          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3280          */
3281         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3282                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3283                         $this->getSummaryInputAttributes( $inputAttrs )
3284                 );
3285                 $inputAttrs += [
3286                         'title' => Linker::titleAttrib( 'summary' ),
3287                         'accessKey' => Linker::accesskey( 'summary' ),
3288                 ];
3289
3290                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3291                 $inputAttrs['inputId'] = $inputAttrs['id'];
3292                 $inputAttrs['id'] = 'wpSummaryWidget';
3293
3294                 return new OOUI\FieldLayout(
3295                         new OOUI\TextInputWidget( [
3296                                 'value' => $summary,
3297                                 'infusable' => true,
3298                         ] + $inputAttrs ),
3299                         [
3300                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3301                                 'align' => 'top',
3302                                 'id' => 'wpSummaryLabel',
3303                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3304                         ]
3305                 );
3306         }
3307
3308         /**
3309          * @param bool $isSubjectPreview True if this is the section subject/title
3310          *   up top, or false if this is the comment summary
3311          *   down below the textarea
3312          * @param string $summary The text of the summary to display
3313          */
3314         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3315                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3316                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3317                 if ( $isSubjectPreview ) {
3318                         if ( $this->nosummary ) {
3319                                 return;
3320                         }
3321                 } elseif ( !$this->mShowSummaryField ) {
3322                         return;
3323                 }
3324
3325                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3326                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3327                                 $summary,
3328                                 $labelText,
3329                                 [ 'class' => $summaryClass ]
3330                         ) );
3331         }
3332
3333         /**
3334          * @param bool $isSubjectPreview True if this is the section subject/title
3335          *   up top, or false if this is the comment summary
3336          *   down below the textarea
3337          * @param string $summary The text of the summary to display
3338          * @return string
3339          */
3340         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3341                 // avoid spaces in preview, gets always trimmed on save
3342                 $summary = trim( $summary );
3343                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3344                         return "";
3345                 }
3346
3347                 if ( $isSubjectPreview ) {
3348                         $summary = $this->context->msg( 'newsectionsummary' )
3349                                 ->rawParams( MediaWikiServices::getInstance()->getParser()
3350                                         ->stripSectionName( $summary ) )
3351                                 ->inContentLanguage()->text();
3352                 }
3353
3354                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3355
3356                 $summary = $this->context->msg( $message )->parse()
3357                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3358                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3359         }
3360
3361         protected function showFormBeforeText() {
3362                 $out = $this->context->getOutput();
3363                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3364                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3365                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3366                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3367                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3368         }
3369
3370         protected function showFormAfterText() {
3371                 /**
3372                  * To make it harder for someone to slip a user a page
3373                  * which submits an edit form to the wiki without their
3374                  * knowledge, a random token is associated with the login
3375                  * session. If it's not passed back with the submission,
3376                  * we won't save the page, or render user JavaScript and
3377                  * CSS previews.
3378                  *
3379                  * For anon editors, who may not have a session, we just
3380                  * include the constant suffix to prevent editing from
3381                  * broken text-mangling proxies.
3382                  */
3383                 $this->context->getOutput()->addHTML(
3384                         "\n" .
3385                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3386                         "\n"
3387                 );
3388         }
3389
3390         /**
3391          * Subpage overridable method for printing the form for page content editing
3392          * By default this simply outputs wpTextbox1
3393          * Subclasses can override this to provide a custom UI for editing;
3394          * be it a form, or simply wpTextbox1 with a modified content that will be
3395          * reverse modified when extracted from the post data.
3396          * Note that this is basically the inverse for importContentFormData
3397          */
3398         protected function showContentForm() {
3399                 $this->showTextbox1();
3400         }
3401
3402         /**
3403          * Method to output wpTextbox1
3404          * The $textoverride method can be used by subclasses overriding showContentForm
3405          * to pass back to this method.
3406          *
3407          * @param array|null $customAttribs Array of html attributes to use in the textarea
3408          * @param string|null $textoverride Optional text to override $this->textarea1 with
3409          */
3410         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3411                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3412                         $attribs = [ 'style' => 'display:none;' ];
3413                 } else {
3414                         $builder = new TextboxBuilder();
3415                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3416
3417                         # Is an old revision being edited?
3418                         if ( $this->isOldRev ) {
3419                                 $classes[] = 'mw-textarea-oldrev';
3420                         }
3421
3422                         $attribs = [ 'tabindex' => 1 ];
3423
3424                         if ( is_array( $customAttribs ) ) {
3425                                 $attribs += $customAttribs;
3426                         }
3427
3428                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3429                 }
3430
3431                 $this->showTextbox(
3432                         $textoverride ?? $this->textbox1,
3433                         'wpTextbox1',
3434                         $attribs
3435                 );
3436         }
3437
3438         protected function showTextbox2() {
3439                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3440         }
3441
3442         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3443                 $builder = new TextboxBuilder();
3444                 $attribs = $builder->buildTextboxAttribs(
3445                         $name,
3446                         $customAttribs,
3447                         $this->context->getUser(),
3448                         $this->mTitle
3449                 );
3450
3451                 $this->context->getOutput()->addHTML(
3452                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3453                 );
3454         }
3455
3456         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3457                 $classes = [];
3458                 if ( $isOnTop ) {
3459                         $classes[] = 'ontop';
3460                 }
3461
3462                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3463
3464                 if ( $this->formtype != 'preview' ) {
3465                         $attribs['style'] = 'display: none;';
3466                 }
3467
3468                 $out = $this->context->getOutput();
3469                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3470
3471                 if ( $this->formtype == 'preview' ) {
3472                         $this->showPreview( $previewOutput );
3473                 } else {
3474                         // Empty content container for LivePreview
3475                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3476                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3477                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3478                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3479                 }
3480
3481                 $out->addHTML( '</div>' );
3482
3483                 if ( $this->formtype == 'diff' ) {
3484                         try {
3485                                 $this->showDiff();
3486                         } catch ( MWContentSerializationException $ex ) {
3487                                 $msg = $this->context->msg(
3488                                         'content-failed-to-parse',
3489                                         $this->contentModel,
3490                                         $this->contentFormat,
3491                                         $ex->getMessage()
3492                                 );
3493                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3494                         }
3495                 }
3496         }
3497
3498         /**
3499          * Append preview output to OutputPage.
3500          * Includes category rendering if this is a category page.
3501          *
3502          * @param string $text The HTML to be output for the preview.
3503          */
3504         protected function showPreview( $text ) {
3505                 if ( $this->mArticle instanceof CategoryPage ) {
3506                         $this->mArticle->openShowCategory();
3507                 }
3508                 # This hook seems slightly odd here, but makes things more
3509                 # consistent for extensions.
3510                 $out = $this->context->getOutput();
3511                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3512                 $out->addHTML( $text );
3513                 if ( $this->mArticle instanceof CategoryPage ) {
3514                         $this->mArticle->closeShowCategory();
3515                 }
3516         }
3517
3518         /**
3519          * Get a diff between the current contents of the edit box and the
3520          * version of the page we're editing from.
3521          *
3522          * If this is a section edit, we'll replace the section as for final
3523          * save and then make a comparison.
3524          */
3525         public function showDiff() {
3526                 $oldtitlemsg = 'currentrev';
3527                 # if message does not exist, show diff against the preloaded default
3528                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3529                         $oldtext = $this->mTitle->getDefaultMessageText();
3530                         if ( $oldtext !== false ) {
3531                                 $oldtitlemsg = 'defaultmessagetext';
3532                                 $oldContent = $this->toEditContent( $oldtext );
3533                         } else {
3534                                 $oldContent = null;
3535                         }
3536                 } else {
3537                         $oldContent = $this->getCurrentContent();
3538                 }
3539
3540                 $textboxContent = $this->toEditContent( $this->textbox1 );
3541                 if ( $this->editRevId !== null ) {
3542                         $newContent = $this->page->replaceSectionAtRev(
3543                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3544                         );
3545                 } else {
3546                         $newContent = $this->page->replaceSectionContent(
3547                                 $this->section, $textboxContent, $this->summary, $this->edittime
3548                         );
3549                 }
3550
3551                 if ( $newContent ) {
3552                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3553
3554                         $user = $this->context->getUser();
3555                         $popts = ParserOptions::newFromUserAndLang( $user,
3556                                 MediaWikiServices::getInstance()->getContentLanguage() );
3557                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3558                 }
3559
3560                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3561                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3562                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3563
3564                         if ( !$oldContent ) {
3565                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3566                         }
3567
3568                         if ( !$newContent ) {
3569                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3570                         }
3571
3572                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3573                         $de->setContent( $oldContent, $newContent );
3574
3575                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3576                         $de->showDiffStyle();
3577                 } else {
3578                         $difftext = '';
3579                 }
3580
3581                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3582         }
3583
3584         /**
3585          * Show the header copyright warning.
3586          */
3587         protected function showHeaderCopyrightWarning() {
3588                 $msg = 'editpage-head-copy-warn';
3589                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3590                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3591                                 'editpage-head-copy-warn' );
3592                 }
3593         }
3594
3595         /**
3596          * Give a chance for site and per-namespace customizations of
3597          * terms of service summary link that might exist separately
3598          * from the copyright notice.
3599          *
3600          * This will display between the save button and the edit tools,
3601          * so should remain short!
3602          */
3603         protected function showTosSummary() {
3604                 $msg = 'editpage-tos-summary';
3605                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3606                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3607                         $out = $this->context->getOutput();
3608                         $out->addHTML( '<div class="mw-tos-summary">' );
3609                         $out->addWikiMsg( $msg );
3610                         $out->addHTML( '</div>' );
3611                 }
3612         }
3613
3614         /**
3615          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3616          * characters not present on most keyboards for copying/pasting.
3617          */
3618         protected function showEditTools() {
3619                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3620                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3621                         '</div>' );
3622         }
3623
3624         /**
3625          * Get the copyright warning
3626          *
3627          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3628          * @return string
3629          */
3630         protected function getCopywarn() {
3631                 return self::getCopyrightWarning( $this->mTitle );
3632         }
3633
3634         /**
3635          * Get the copyright warning, by default returns wikitext
3636          *
3637          * @param Title $title
3638          * @param string $format Output format, valid values are any function of a Message object
3639          * @param Language|string|null $langcode Language code or Language object.
3640          * @return string
3641          */
3642         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3643                 global $wgRightsText;
3644                 if ( $wgRightsText ) {
3645                         $copywarnMsg = [ 'copyrightwarning',
3646                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3647                                 $wgRightsText ];
3648                 } else {
3649                         $copywarnMsg = [ 'copyrightwarning2',
3650                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3651                 }
3652                 // Allow for site and per-namespace customization of contribution/copyright notice.
3653                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3654
3655                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3656                 if ( $langcode ) {
3657                         $msg->inLanguage( $langcode );
3658                 }
3659                 return "<div id=\"editpage-copywarn\">\n" .
3660                         $msg->$format() . "\n</div>";
3661         }
3662
3663         /**
3664          * Get the Limit report for page previews
3665          *
3666          * @since 1.22
3667          * @param ParserOutput|null $output ParserOutput object from the parse
3668          * @return string HTML
3669          */
3670         public static function getPreviewLimitReport( ParserOutput $output = null ) {
3671                 global $wgLang;
3672
3673                 if ( !$output || !$output->getLimitReportData() ) {
3674                         return '';
3675                 }
3676
3677                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3678                         wfMessage( 'limitreport-title' )->parseAsBlock()
3679                 );
3680
3681                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3682                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3683
3684                 $limitReport .= Html::openElement( 'table', [
3685                         'class' => 'preview-limit-report wikitable'
3686                 ] ) .
3687                         Html::openElement( 'tbody' );
3688
3689                 foreach ( $output->getLimitReportData() as $key => $value ) {
3690                         if ( Hooks::run( 'ParserLimitReportFormat',
3691                                 [ $key, &$value, &$limitReport, true, true ]
3692                         ) ) {
3693                                 $keyMsg = wfMessage( $key );
3694                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3695                                 if ( !$valueMsg->exists() ) {
3696                                         $valueMsg = new RawMessage( '$1' );
3697                                 }
3698                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3699                                         $limitReport .= Html::openElement( 'tr' ) .
3700                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3701                                                 Html::rawElement( 'td', null,
3702                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3703                                                 ) .
3704                                                 Html::closeElement( 'tr' );
3705                                 }
3706                         }
3707                 }
3708
3709                 $limitReport .= Html::closeElement( 'tbody' ) .
3710                         Html::closeElement( 'table' ) .
3711                         Html::closeElement( 'div' );
3712
3713                 return $limitReport;
3714         }
3715
3716         protected function showStandardInputs( &$tabindex = 2 ) {
3717                 $out = $this->context->getOutput();
3718                 $out->addHTML( "<div class='editOptions'>\n" );
3719
3720                 if ( $this->section != 'new' ) {
3721                         $this->showSummaryInput( false, $this->summary );
3722                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3723                 }
3724
3725                 $checkboxes = $this->getCheckboxesWidget(
3726                         $tabindex,
3727                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3728                 );
3729                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3730
3731                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3732
3733                 // Show copyright warning.
3734                 $out->addWikiTextAsInterface( $this->getCopywarn() );
3735                 $out->addHTML( $this->editFormTextAfterWarn );
3736
3737                 $out->addHTML( "<div class='editButtons'>\n" );
3738                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3739
3740                 $cancel = $this->getCancelLink();
3741
3742                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3743                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3744                 $edithelp =
3745                         Html::linkButton(
3746                                 $this->context->msg( 'edithelp' )->text(),
3747                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3748                                 [ 'mw-ui-quiet' ]
3749                         ) .
3750                         $this->context->msg( 'word-separator' )->escaped() .
3751                         $this->context->msg( 'newwindow' )->parse();
3752
3753                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3754                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3755                 $out->addHTML( "</div><!-- editButtons -->\n" );
3756
3757                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3758
3759                 $out->addHTML( "</div><!-- editOptions -->\n" );
3760         }
3761
3762         /**
3763          * Show an edit conflict. textbox1 is already shown in showEditForm().
3764          * If you want to use another entry point to this function, be careful.
3765          */
3766         protected function showConflict() {
3767                 $out = $this->context->getOutput();
3768                 // Avoid PHP 7.1 warning of passing $this by reference
3769                 $editPage = $this;
3770                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3771                         $this->incrementConflictStats();
3772
3773                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3774                 }
3775         }
3776
3777         protected function incrementConflictStats() {
3778                 $this->getEditConflictHelper()->incrementConflictStats();
3779         }
3780
3781         /**
3782          * @return string
3783          */
3784         public function getCancelLink() {
3785                 $cancelParams = [];
3786                 if ( !$this->isConflict && $this->oldid > 0 ) {
3787                         $cancelParams['oldid'] = $this->oldid;
3788                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3789                         $cancelParams['redirect'] = 'no';
3790                 }
3791
3792                 return new OOUI\ButtonWidget( [
3793                         'id' => 'mw-editform-cancel',
3794                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3795                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3796                         'framed' => false,
3797                         'infusable' => true,
3798                         'flags' => 'destructive',
3799                 ] );
3800         }
3801
3802         /**
3803          * Returns the URL to use in the form's action attribute.
3804          * This is used by EditPage subclasses when simply customizing the action
3805          * variable in the constructor is not enough. This can be used when the
3806          * EditPage lives inside of a Special page rather than a custom page action.
3807          *
3808          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3809          * @return string
3810          */
3811         protected function getActionURL( Title $title ) {
3812                 return $title->getLocalURL( [ 'action' => $this->action ] );
3813         }
3814
3815         /**
3816          * Check if a page was deleted while the user was editing it, before submit.
3817          * Note that we rely on the logging table, which hasn't been always there,
3818          * but that doesn't matter, because this only applies to brand new
3819          * deletes.
3820          * @return bool
3821          */
3822         protected function wasDeletedSinceLastEdit() {
3823                 if ( $this->deletedSinceEdit !== null ) {
3824                         return $this->deletedSinceEdit;
3825                 }
3826
3827                 $this->deletedSinceEdit = false;
3828
3829                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3830                         $this->lastDelete = $this->getLastDelete();
3831                         if ( $this->lastDelete ) {
3832                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3833                                 if ( $deleteTime > $this->starttime ) {
3834                                         $this->deletedSinceEdit = true;
3835                                 }
3836                         }
3837                 }
3838
3839                 return $this->deletedSinceEdit;
3840         }
3841
3842         /**
3843          * Get the last log record of this page being deleted, if ever.  This is
3844          * used to detect whether a delete occurred during editing.
3845          * @return bool|stdClass
3846          */
3847         protected function getLastDelete() {
3848                 $dbr = wfGetDB( DB_REPLICA );
3849                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3850                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3851                 $data = $dbr->selectRow(
3852                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3853                         [
3854                                 'log_type',
3855                                 'log_action',
3856                                 'log_timestamp',
3857                                 'log_namespace',
3858                                 'log_title',
3859                                 'log_params',
3860                                 'log_deleted',
3861                                 'user_name'
3862                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3863                         [
3864                                 'log_namespace' => $this->mTitle->getNamespace(),
3865                                 'log_title' => $this->mTitle->getDBkey(),
3866                                 'log_type' => 'delete',
3867                                 'log_action' => 'delete',
3868                         ],
3869                         __METHOD__,
3870                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3871                         [
3872                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3873                         ] + $commentQuery['joins'] + $actorQuery['joins']
3874                 );
3875                 // Quick paranoid permission checks...
3876                 if ( is_object( $data ) ) {
3877                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3878                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3879                         }
3880
3881                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3882                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3883                                 $data->log_comment_data = null;
3884                         }
3885                 }
3886
3887                 return $data;
3888         }
3889
3890         /**
3891          * Get the rendered text for previewing.
3892          * @throws MWException
3893          * @return string
3894          */
3895         public function getPreviewText() {
3896                 $out = $this->context->getOutput();
3897                 $config = $this->context->getConfig();
3898
3899                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3900                         // Could be an offsite preview attempt. This is very unsafe if
3901                         // HTML is enabled, as it could be an attack.
3902                         $parsedNote = '';
3903                         if ( $this->textbox1 !== '' ) {
3904                                 // Do not put big scary notice, if previewing the empty
3905                                 // string, which happens when you initially edit
3906                                 // a category page, due to automatic preview-on-open.
3907                                 $parsedNote = Html::rawElement( 'div', [ 'class' => 'previewnote' ],
3908                                         $out->parseAsInterface(
3909                                                 $this->context->msg( 'session_fail_preview_html' )->plain()
3910                                         ) );
3911                         }
3912                         $this->incrementEditFailureStats( 'session_loss' );
3913                         return $parsedNote;
3914                 }
3915
3916                 $note = '';
3917
3918                 try {
3919                         $content = $this->toEditContent( $this->textbox1 );
3920
3921                         $previewHTML = '';
3922                         if ( !Hooks::run(
3923                                 'AlternateEditPreview',
3924                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3925                         ) {
3926                                 return $previewHTML;
3927                         }
3928
3929                         # provide a anchor link to the editform
3930                         $continueEditing = '<span class="mw-continue-editing">' .
3931                                 '[[#' . self::EDITFORM_ID . '|' .
3932                                 $this->context->getLanguage()->getArrow() . ' ' .
3933                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3934                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3935                                 if ( $this->mTokenOkExceptSuffix ) {
3936                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3937                                         $this->incrementEditFailureStats( 'bad_token' );
3938                                 } else {
3939                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3940                                         $this->incrementEditFailureStats( 'session_loss' );
3941                                 }
3942                         } elseif ( $this->incompleteForm ) {
3943                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3944                                 if ( $this->mTriedSave ) {
3945                                         $this->incrementEditFailureStats( 'incomplete_form' );
3946                                 }
3947                         } else {
3948                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3949                         }
3950
3951                         # don't parse non-wikitext pages, show message about preview
3952                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3953                                 if ( $this->mTitle->isUserConfigPage() ) {
3954                                         $level = 'user';
3955                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3956                                         $level = 'site';
3957                                 } else {
3958                                         $level = false;
3959                                 }
3960
3961                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3962                                         $format = 'css';
3963                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3964                                                 $format = false;
3965                                         }
3966                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3967                                         $format = 'json';
3968                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3969                                                 $format = false;
3970                                         }
3971                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3972                                         $format = 'js';
3973                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3974                                                 $format = false;
3975                                         }
3976                                 } else {
3977                                         $format = false;
3978                                 }
3979
3980                                 # Used messages to make sure grep find them:
3981                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
3982                                 #   sitecsspreview, sitejsonpreview, sitejspreview
3983                                 if ( $level && $format ) {
3984                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3985                                                 $this->context->msg( "{$level}{$format}preview" )->plain() .
3986                                                 ' ' . $continueEditing . "</div>";
3987                                 }
3988                         }
3989
3990                         # If we're adding a comment, we need to show the
3991                         # summary as the headline
3992                         if ( $this->section === "new" && $this->summary !== "" ) {
3993                                 $content = $content->addSectionHeader( $this->summary );
3994                         }
3995
3996                         $hook_args = [ $this, &$content ];
3997                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3998
3999                         $parserResult = $this->doPreviewParse( $content );
4000                         $parserOutput = $parserResult['parserOutput'];
4001                         $previewHTML = $parserResult['html'];
4002                         $this->mParserOutput = $parserOutput;
4003                         $out->addParserOutputMetadata( $parserOutput );
4004                         if ( $out->userCanPreview() ) {
4005                                 $out->addContentOverride( $this->getTitle(), $content );
4006                         }
4007
4008                         if ( count( $parserOutput->getWarnings() ) ) {
4009                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
4010                         }
4011
4012                 } catch ( MWContentSerializationException $ex ) {
4013                         $m = $this->context->msg(
4014                                 'content-failed-to-parse',
4015                                 $this->contentModel,
4016                                 $this->contentFormat,
4017                                 $ex->getMessage()
4018                         );
4019                         $note .= "\n\n" . $m->plain(); # gets parsed down below
4020                         $previewHTML = '';
4021                 }
4022
4023                 if ( $this->isConflict ) {
4024                         $conflict = Html::rawElement(
4025                                 'h2', [ 'id' => 'mw-previewconflict' ],
4026                                 $this->context->msg( 'previewconflict' )->escaped()
4027                         );
4028                 } else {
4029                         $conflict = '<hr />';
4030                 }
4031
4032                 $previewhead = Html::rawElement(
4033                         'div', [ 'class' => 'previewnote' ],
4034                         Html::rawElement(
4035                                 'h2', [ 'id' => 'mw-previewheader' ],
4036                                 $this->context->msg( 'preview' )->escaped()
4037                         ) .
4038                         $out->parseAsInterface( $note ) . $conflict
4039                 );
4040
4041                 $pageViewLang = $this->mTitle->getPageViewLanguage();
4042                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
4043                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
4044                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
4045
4046                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
4047         }
4048
4049         private function incrementEditFailureStats( $failureType ) {
4050                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
4051                 $stats->increment( 'edit.failures.' . $failureType );
4052         }
4053
4054         /**
4055          * Get parser options for a preview
4056          * @return ParserOptions
4057          */
4058         protected function getPreviewParserOptions() {
4059                 $parserOptions = $this->page->makeParserOptions( $this->context );
4060                 $parserOptions->setIsPreview( true );
4061                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
4062                 $parserOptions->enableLimitReport();
4063
4064                 // XXX: we could call $parserOptions->setCurrentRevisionCallback here to force the
4065                 // current revision to be null during PST, until setupFakeRevision is called on
4066                 // the ParserOptions. Currently, we rely on Parser::getRevisionObject() to ignore
4067                 // existing revisions in preview mode.
4068
4069                 return $parserOptions;
4070         }
4071
4072         /**
4073          * Parse the page for a preview. Subclasses may override this class, in order
4074          * to parse with different options, or to otherwise modify the preview HTML.
4075          *
4076          * @param Content $content The page content
4077          * @return array with keys:
4078          *   - parserOutput: The ParserOutput object
4079          *   - html: The HTML to be displayed
4080          */
4081         protected function doPreviewParse( Content $content ) {
4082                 $user = $this->context->getUser();
4083                 $parserOptions = $this->getPreviewParserOptions();
4084
4085                 // NOTE: preSaveTransform doesn't have a fake revision to operate on.
4086                 // Parser::getRevisionObject() will return null in preview mode,
4087                 // causing the context user to be used for {{subst:REVISIONUSER}}.
4088                 // XXX: Alternatively, we could also call setupFakeRevision() a second time:
4089                 // once before PST with $content, and then after PST with $pstContent.
4090                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4091                 $scopedCallback = $parserOptions->setupFakeRevision( $this->mTitle, $pstContent, $user );
4092                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4093                 ScopedCallback::consume( $scopedCallback );
4094                 return [
4095                         'parserOutput' => $parserOutput,
4096                         'html' => $parserOutput->getText( [
4097                                 'enableSectionEditLinks' => false
4098                         ] )
4099                 ];
4100         }
4101
4102         /**
4103          * @return array
4104          */
4105         public function getTemplates() {
4106                 if ( $this->preview || $this->section != '' ) {
4107                         $templates = [];
4108                         if ( !isset( $this->mParserOutput ) ) {
4109                                 return $templates;
4110                         }
4111                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4112                                 foreach ( array_keys( $template ) as $dbk ) {
4113                                         $templates[] = Title::makeTitle( $ns, $dbk );
4114                                 }
4115                         }
4116                         return $templates;
4117                 } else {
4118                         return $this->mTitle->getTemplateLinksFrom();
4119                 }
4120         }
4121
4122         /**
4123          * Allow extensions to provide a toolbar.
4124          *
4125          * @return string|null
4126          */
4127         public static function getEditToolbar() {
4128                 $startingToolbar = '<div id="toolbar"></div>';
4129                 $toolbar = $startingToolbar;
4130
4131                 if ( !Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4132                         return null;
4133                 };
4134                 // Don't add a pointless `<div>` to the page unless a hook caller populated it
4135                 return ( $toolbar === $startingToolbar ) ? null : $toolbar;
4136         }
4137
4138         /**
4139          * Return an array of checkbox definitions.
4140          *
4141          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4142          *
4143          * Array values are associative arrays with the following keys:
4144          *  - 'label-message' (required): message for label text
4145          *  - 'id' (required): 'id' attribute for the `<input>`
4146          *  - 'default' (required): default checkedness (true or false)
4147          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4148          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4149          *    from messages like 'tooltip-foo', 'accesskey-foo'
4150          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4151          *  - 'legacy-name' (optional): short name for backwards-compatibility
4152          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4153          *   where bool indicates the checked status of the checkbox
4154          * @return array
4155          */
4156         public function getCheckboxesDefinition( $checked ) {
4157                 $checkboxes = [];
4158
4159                 $user = $this->context->getUser();
4160                 // don't show the minor edit checkbox if it's a new page or section
4161                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4162                         $checkboxes['wpMinoredit'] = [
4163                                 'id' => 'wpMinoredit',
4164                                 'label-message' => 'minoredit',
4165                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4166                                 'tooltip' => 'minoredit',
4167                                 'label-id' => 'mw-editpage-minoredit',
4168                                 'legacy-name' => 'minor',
4169                                 'default' => $checked['minor'],
4170                         ];
4171                 }
4172
4173                 if ( $user->isLoggedIn() ) {
4174                         $checkboxes['wpWatchthis'] = [
4175                                 'id' => 'wpWatchthis',
4176                                 'label-message' => 'watchthis',
4177                                 // Uses messages: tooltip-watch, accesskey-watch
4178                                 'tooltip' => 'watch',
4179                                 'label-id' => 'mw-editpage-watch',
4180                                 'legacy-name' => 'watch',
4181                                 'default' => $checked['watch'],
4182                         ];
4183                 }
4184
4185                 $editPage = $this;
4186                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4187
4188                 return $checkboxes;
4189         }
4190
4191         /**
4192          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4193          * any other added by extensions.
4194          *
4195          * @param int &$tabindex Current tabindex
4196          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4197          *                 status of the checkbox
4198          *
4199          * @return array Associative array of string keys to OOUI\FieldLayout instances
4200          */
4201         public function getCheckboxesWidget( &$tabindex, $checked ) {
4202                 $checkboxes = [];
4203                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4204
4205                 foreach ( $checkboxesDef as $name => $options ) {
4206                         $legacyName = $options['legacy-name'] ?? $name;
4207
4208                         $title = null;
4209                         $accesskey = null;
4210                         if ( isset( $options['tooltip'] ) ) {
4211                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4212                                 $title = Linker::titleAttrib( $options['tooltip'] );
4213                         }
4214                         if ( isset( $options['title-message'] ) ) {
4215                                 $title = $this->context->msg( $options['title-message'] )->text();
4216                         }
4217
4218                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4219                                 new OOUI\CheckboxInputWidget( [
4220                                         'tabIndex' => ++$tabindex,
4221                                         'accessKey' => $accesskey,
4222                                         'id' => $options['id'] . 'Widget',
4223                                         'inputId' => $options['id'],
4224                                         'name' => $name,
4225                                         'selected' => $options['default'],
4226                                         'infusable' => true,
4227                                 ] ),
4228                                 [
4229                                         'align' => 'inline',
4230                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4231                                         'title' => $title,
4232                                         'id' => $options['label-id'] ?? null,
4233                                 ]
4234                         );
4235                 }
4236
4237                 return $checkboxes;
4238         }
4239
4240         /**
4241          * Get the message key of the label for the button to save the page
4242          *
4243          * @since 1.30
4244          * @return string
4245          */
4246         protected function getSubmitButtonLabel() {
4247                 $labelAsPublish =
4248                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4249
4250                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4251                 $newPage = !$this->mTitle->exists();
4252
4253                 if ( $labelAsPublish ) {
4254                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4255                 } else {
4256                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4257                 }
4258
4259                 return $buttonLabelKey;
4260         }
4261
4262         /**
4263          * Returns an array of html code of the following buttons:
4264          * save, diff and preview
4265          *
4266          * @param int &$tabindex Current tabindex
4267          *
4268          * @return array
4269          */
4270         public function getEditButtons( &$tabindex ) {
4271                 $buttons = [];
4272
4273                 $labelAsPublish =
4274                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4275
4276                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4277                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4278
4279                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4280                         'name' => 'wpSave',
4281                         'tabIndex' => ++$tabindex,
4282                         'id' => 'wpSaveWidget',
4283                         'inputId' => 'wpSave',
4284                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4285                         'useInputTag' => true,
4286                         'flags' => [ 'progressive', 'primary' ],
4287                         'label' => $buttonLabel,
4288                         'infusable' => true,
4289                         'type' => 'submit',
4290                         // Messages used: tooltip-save, tooltip-publish
4291                         'title' => Linker::titleAttrib( $buttonTooltip ),
4292                         // Messages used: accesskey-save, accesskey-publish
4293                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4294                 ] );
4295
4296                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4297                         'name' => 'wpPreview',
4298                         'tabIndex' => ++$tabindex,
4299                         'id' => 'wpPreviewWidget',
4300                         'inputId' => 'wpPreview',
4301                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4302                         'useInputTag' => true,
4303                         'label' => $this->context->msg( 'showpreview' )->text(),
4304                         'infusable' => true,
4305                         'type' => 'submit',
4306                         // Message used: tooltip-preview
4307                         'title' => Linker::titleAttrib( 'preview' ),
4308                         // Message used: accesskey-preview
4309                         'accessKey' => Linker::accesskey( 'preview' ),
4310                 ] );
4311
4312                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4313                         'name' => 'wpDiff',
4314                         'tabIndex' => ++$tabindex,
4315                         'id' => 'wpDiffWidget',
4316                         'inputId' => 'wpDiff',
4317                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4318                         'useInputTag' => true,
4319                         'label' => $this->context->msg( 'showdiff' )->text(),
4320                         'infusable' => true,
4321                         'type' => 'submit',
4322                         // Message used: tooltip-diff
4323                         'title' => Linker::titleAttrib( 'diff' ),
4324                         // Message used: accesskey-diff
4325                         'accessKey' => Linker::accesskey( 'diff' ),
4326                 ] );
4327
4328                 // Avoid PHP 7.1 warning of passing $this by reference
4329                 $editPage = $this;
4330                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4331
4332                 return $buttons;
4333         }
4334
4335         /**
4336          * Creates a basic error page which informs the user that
4337          * they have attempted to edit a nonexistent section.
4338          */
4339         public function noSuchSectionPage() {
4340                 $out = $this->context->getOutput();
4341                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4342
4343                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4344
4345                 // Avoid PHP 7.1 warning of passing $this by reference
4346                 $editPage = $this;
4347                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4348                 $out->addHTML( $res );
4349
4350                 $out->returnToMain( false, $this->mTitle );
4351         }
4352
4353         /**
4354          * Show "your edit contains spam" page with your diff and text
4355          *
4356          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4357          */
4358         public function spamPageWithContent( $match = false ) {
4359                 $this->textbox2 = $this->textbox1;
4360
4361                 if ( is_array( $match ) ) {
4362                         $match = $this->context->getLanguage()->listToText( $match );
4363                 }
4364                 $out = $this->context->getOutput();
4365                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4366
4367                 $out->addHTML( '<div id="spamprotected">' );
4368                 $out->addWikiMsg( 'spamprotectiontext' );
4369                 if ( $match ) {
4370                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4371                 }
4372                 $out->addHTML( '</div>' );
4373
4374                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4375                 $this->showDiff();
4376
4377                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4378                 $this->showTextbox2();
4379
4380                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4381         }
4382
4383         /**
4384          * @since 1.29
4385          */
4386         protected function addEditNotices() {
4387                 $out = $this->context->getOutput();
4388                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4389                 if ( count( $editNotices ) ) {
4390                         $out->addHTML( implode( "\n", $editNotices ) );
4391                 } else {
4392                         $msg = $this->context->msg( 'editnotice-notext' );
4393                         if ( !$msg->isDisabled() ) {
4394                                 $out->addHTML(
4395                                         '<div class="mw-editnotice-notext">'
4396                                         . $msg->parseAsBlock()
4397                                         . '</div>'
4398                                 );
4399                         }
4400                 }
4401         }
4402
4403         /**
4404          * @since 1.29
4405          */
4406         protected function addTalkPageText() {
4407                 if ( $this->mTitle->isTalkPage() ) {
4408                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4409                 }
4410         }
4411
4412         /**
4413          * @since 1.29
4414          */
4415         protected function addLongPageWarningHeader() {
4416                 if ( $this->contentLength === false ) {
4417                         $this->contentLength = strlen( $this->textbox1 );
4418                 }
4419
4420                 $out = $this->context->getOutput();
4421                 $lang = $this->context->getLanguage();
4422                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4423                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4424                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4425                                 [
4426                                         'longpageerror',
4427                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4428                                         $lang->formatNum( $maxArticleSize )
4429                                 ]
4430                         );
4431                 } elseif ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4432                         $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4433                                 [
4434                                         'longpage-hint',
4435                                         $lang->formatSize( strlen( $this->textbox1 ) ),
4436                                         strlen( $this->textbox1 )
4437                                 ]
4438                         );
4439                 }
4440         }
4441
4442         /**
4443          * @since 1.29
4444          */
4445         protected function addPageProtectionWarningHeaders() {
4446                 $out = $this->context->getOutput();
4447                 if ( $this->mTitle->isProtected( 'edit' ) &&
4448                         MediaWikiServices::getInstance()->getNamespaceInfo()->getRestrictionLevels(
4449                                 $this->mTitle->getNamespace()
4450                         ) !== [ '' ]
4451                 ) {
4452                         # Is the title semi-protected?
4453                         if ( $this->mTitle->isSemiProtected() ) {
4454                                 $noticeMsg = 'semiprotectedpagewarning';
4455                         } else {
4456                                 # Then it must be protected based on static groups (regular)
4457                                 $noticeMsg = 'protectedpagewarning';
4458                         }
4459                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4460                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4461                 }
4462                 if ( $this->mTitle->isCascadeProtected() ) {
4463                         # Is this page under cascading protection from some source pages?
4464                         /** @var Title[] $cascadeSources */
4465                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4466                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4467                         $cascadeSourcesCount = count( $cascadeSources );
4468                         if ( $cascadeSourcesCount > 0 ) {
4469                                 # Explain, and list the titles responsible
4470                                 foreach ( $cascadeSources as $page ) {
4471                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4472                                 }
4473                         }
4474                         $notice .= '</div>';
4475                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4476                 }
4477                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4478                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4479                                 [ 'lim' => 1,
4480                                         'showIfEmpty' => false,
4481                                         'msgKey' => [ 'titleprotectedwarning' ],
4482                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4483                 }
4484         }
4485
4486         /**
4487          * @param OutputPage $out
4488          * @since 1.29
4489          */
4490         protected function addExplainConflictHeader( OutputPage $out ) {
4491                 $out->addHTML(
4492                         $this->getEditConflictHelper()->getExplainHeader()
4493                 );
4494         }
4495
4496         /**
4497          * @param string $name
4498          * @param mixed[] $customAttribs
4499          * @param User $user
4500          * @return mixed[]
4501          * @since 1.29
4502          */
4503         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4504                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4505                         $name, $customAttribs, $user, $this->mTitle
4506                 );
4507         }
4508
4509         /**
4510          * @param string $wikitext
4511          * @return string
4512          * @since 1.29
4513          */
4514         protected function addNewLineAtEnd( $wikitext ) {
4515                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4516         }
4517
4518         /**
4519          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4520          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4521          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4522          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4523          * spread the new style links more efficiently.
4524          *
4525          * @param string $text
4526          * @return string
4527          */
4528         private function guessSectionName( $text ) {
4529                 // Detect Microsoft browsers
4530                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4531                 $parser = MediaWikiServices::getInstance()->getParser();
4532                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4533                         // ...and redirect them to legacy encoding, if available
4534                         return $parser->guessLegacySectionNameFromWikiText( $text );
4535                 }
4536                 // Meanwhile, real browsers get real anchors
4537                 $name = $parser->guessSectionNameFromWikiText( $text );
4538                 // With one little caveat: per T216029, fragments in HTTP redirects need to be urlencoded,
4539                 // otherwise Chrome double-escapes the rest of the URL.
4540                 return '#' . urlencode( mb_substr( $name, 1 ) );
4541         }
4542
4543         /**
4544          * Set a factory function to create an EditConflictHelper
4545          *
4546          * @param callable $factory Factory function
4547          * @since 1.31
4548          */
4549         public function setEditConflictHelperFactory( callable $factory ) {
4550                 $this->editConflictHelperFactory = $factory;
4551                 $this->editConflictHelper = null;
4552         }
4553
4554         /**
4555          * @return TextConflictHelper
4556          */
4557         private function getEditConflictHelper() {
4558                 if ( !$this->editConflictHelper ) {
4559                         $this->editConflictHelper = call_user_func(
4560                                 $this->editConflictHelperFactory,
4561                                 $this->getSubmitButtonLabel()
4562                         );
4563                 }
4564
4565                 return $this->editConflictHelper;
4566         }
4567
4568         /**
4569          * @param string $submitButtonLabel
4570          * @return TextConflictHelper
4571          */
4572         private function newTextConflictHelper( $submitButtonLabel ) {
4573                 return new TextConflictHelper(
4574                         $this->getTitle(),
4575                         $this->getContext()->getOutput(),
4576                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4577                         $submitButtonLabel
4578                 );
4579         }
4580 }