includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\EditPage\TextboxBuilder;
  24 use MediaWiki\EditPage\TextConflictHelper;
  25 use MediaWiki\Logger\LoggerFactory;
  26 use MediaWiki\MediaWikiServices;
  27 use Wikimedia\ScopedCallback;
  28
  29 /**
  30  * The edit page/HTML interface (split from Article)
  31  * The actual database and text munging is still in Article,
  32  * but it should get easier to call those from alternate
  33  * interfaces.
  34  *
  35  * EditPage cares about two distinct titles:
  36  * $this->mContextTitle is the page that forms submit to, links point to,
  37  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  38  * page in the database that is actually being edited. These are
  39  * usually the same, but they are now allowed to be different.
  40  *
  41  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  42  * headaches, which may be fatal.
  43  */
  44 class EditPage {
  45         /**
  46          * Used for Unicode support checks
  47          */
  48         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  49
  50         /**
  51          * Status: Article successfully updated
  52          */
  53         const AS_SUCCESS_UPDATE = 200;
  54
  55         /**
  56          * Status: Article successfully created
  57          */
  58         const AS_SUCCESS_NEW_ARTICLE = 201;
  59
  60         /**
  61          * Status: Article update aborted by a hook function
  62          */
  63         const AS_HOOK_ERROR = 210;
  64
  65         /**
  66          * Status: A hook function returned an error
  67          */
  68         const AS_HOOK_ERROR_EXPECTED = 212;
  69
  70         /**
  71          * Status: User is blocked from editing this page
  72          */
  73         const AS_BLOCKED_PAGE_FOR_USER = 215;
  74
  75         /**
  76          * Status: Content too big (> $wgMaxArticleSize)
  77          */
  78         const AS_CONTENT_TOO_BIG = 216;
  79
  80         /**
  81          * Status: this anonymous user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_ANON = 218;
  84
  85         /**
  86          * Status: this logged in user is not allowed to edit this page
  87          */
  88         const AS_READ_ONLY_PAGE_LOGGED = 219;
  89
  90         /**
  91          * Status: wiki is in readonly mode (wfReadOnly() == true)
  92          */
  93         const AS_READ_ONLY_PAGE = 220;
  94
  95         /**
  96          * Status: rate limiter for action 'edit' was tripped
  97          */
  98         const AS_RATE_LIMITED = 221;
  99
 100         /**
 101          * Status: article was deleted while editing and param wpRecreate == false or form
 102          * was not posted
 103          */
 104         const AS_ARTICLE_WAS_DELETED = 222;
 105
 106         /**
 107          * Status: user tried to create this page, but is not allowed to do that
 108          * ( Title->userCan('create') == false )
 109          */
 110         const AS_NO_CREATE_PERMISSION = 223;
 111
 112         /**
 113          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 114          */
 115         const AS_BLANK_ARTICLE = 224;
 116
 117         /**
 118          * Status: (non-resolvable) edit conflict
 119          */
 120         const AS_CONFLICT_DETECTED = 225;
 121
 122         /**
 123          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 124          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 125          */
 126         const AS_SUMMARY_NEEDED = 226;
 127
 128         /**
 129          * Status: user tried to create a new section without content
 130          */
 131         const AS_TEXTBOX_EMPTY = 228;
 132
 133         /**
 134          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 135          */
 136         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: user tried to modify the content model, but is not allowed to do that
 160          * ( User::isAllowed('editcontentmodel') == false )
 161          */
 162         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 163
 164         /**
 165          * Status: user tried to create self-redirect (redirect to the same article) and
 166          * wpIgnoreSelfRedirect == false
 167          */
 168         const AS_SELF_REDIRECT = 236;
 169
 170         /**
 171          * Status: an error relating to change tagging. Look at the message key for
 172          * more details
 173          */
 174         const AS_CHANGE_TAG_ERROR = 237;
 175
 176         /**
 177          * Status: can't parse content
 178          */
 179         const AS_PARSE_ERROR = 240;
 180
 181         /**
 182          * Status: when changing the content model is disallowed due to
 183          * $wgContentHandlerUseDB being false
 184          */
 185         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 186
 187         /**
 188          * Status: edit rejected because browser doesn't support Unicode.
 189          */
 190         const AS_UNICODE_NOT_SUPPORTED = 242;
 191
 192         /**
 193          * HTML id and name for the beginning of the edit form.
 194          */
 195         const EDITFORM_ID = 'editform';
 196
 197         /**
 198          * Prefix of key for cookie used to pass post-edit state.
 199          * The revision id edited is added after this
 200          */
 201         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 202
 203         /**
 204          * Duration of PostEdit cookie, in seconds.
 205          * The cookie will be removed instantly if the JavaScript runs.
 206          *
 207          * Otherwise, though, we don't want the cookies to accumulate.
 208          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 209          * limit of only 20 cookies per domain. This still applies at least to some
 210          * versions of IE without full updates:
 211          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 212          *
 213          * A value of 20 minutes should be enough to take into account slow loads and minor
 214          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 215          */
 216         const POST_EDIT_COOKIE_DURATION = 1200;
 217
 218         /**
 219          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 220          * @var Article
 221          */
 222         public $mArticle;
 223         /** @var WikiPage */
 224         private $page;
 225
 226         /**
 227          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 228          * @var Title
 229          */
 230         public $mTitle;
 231
 232         /** @var null|Title */
 233         private $mContextTitle = null;
 234
 235         /** @var string */
 236         public $action = 'submit';
 237
 238         /** @var bool */
 239         public $isConflict = false;
 240
 241         /**
 242          * @deprecated since 1.30 use Title::isCssJsSubpage()
 243          * @var bool
 244          */
 245         public $isCssJsSubpage = false;
 246
 247         /**
 248          * @deprecated since 1.30 use Title::isCssSubpage()
 249          * @var bool
 250          */
 251         public $isCssSubpage = false;
 252
 253         /**
 254          * @deprecated since 1.30 use Title::isJsSubpage()
 255          * @var bool
 256          */
 257         public $isJsSubpage = false;
 258
 259         /**
 260          * @deprecated since 1.30
 261          * @var bool
 262          */
 263         public $isWrongCaseCssJsPage = false;
 264
 265         /** @var bool New page or new section */
 266         public $isNew = false;
 267
 268         /** @var bool */
 269         public $deletedSinceEdit;
 270
 271         /** @var string */
 272         public $formtype;
 273
 274         /** @var bool */
 275         public $firsttime;
 276
 277         /** @var bool|stdClass */
 278         public $lastDelete;
 279
 280         /** @var bool */
 281         public $mTokenOk = false;
 282
 283         /** @var bool */
 284         public $mTokenOkExceptSuffix = false;
 285
 286         /** @var bool */
 287         public $mTriedSave = false;
 288
 289         /** @var bool */
 290         public $incompleteForm = false;
 291
 292         /** @var bool */
 293         public $tooBig = false;
 294
 295         /** @var bool */
 296         public $missingComment = false;
 297
 298         /** @var bool */
 299         public $missingSummary = false;
 300
 301         /** @var bool */
 302         public $allowBlankSummary = false;
 303
 304         /** @var bool */
 305         protected $blankArticle = false;
 306
 307         /** @var bool */
 308         protected $allowBlankArticle = false;
 309
 310         /** @var bool */
 311         protected $selfRedirect = false;
 312
 313         /** @var bool */
 314         protected $allowSelfRedirect = false;
 315
 316         /** @var string */
 317         public $autoSumm = '';
 318
 319         /** @var string */
 320         public $hookError = '';
 321
 322         /** @var ParserOutput */
 323         public $mParserOutput;
 324
 325         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 326         public $hasPresetSummary = false;
 327
 328         /** @var Revision|bool */
 329         public $mBaseRevision = false;
 330
 331         /** @var bool */
 332         public $mShowSummaryField = true;
 333
 334         # Form values
 335
 336         /** @var bool */
 337         public $save = false;
 338
 339         /** @var bool */
 340         public $preview = false;
 341
 342         /** @var bool */
 343         public $diff = false;
 344
 345         /** @var bool */
 346         public $minoredit = false;
 347
 348         /** @var bool */
 349         public $watchthis = false;
 350
 351         /** @var bool */
 352         public $recreate = false;
 353
 354         /** @var string */
 355         public $textbox1 = '';
 356
 357         /** @var string */
 358         public $textbox2 = '';
 359
 360         /** @var string */
 361         public $summary = '';
 362
 363         /** @var bool */
 364         public $nosummary = false;
 365
 366         /** @var string */
 367         public $edittime = '';
 368
 369         /** @var int */
 370         private $editRevId = null;
 371
 372         /** @var string */
 373         public $section = '';
 374
 375         /** @var string */
 376         public $sectiontitle = '';
 377
 378         /** @var string */
 379         public $starttime = '';
 380
 381         /** @var int */
 382         public $oldid = 0;
 383
 384         /** @var int */
 385         public $parentRevId = 0;
 386
 387         /** @var string */
 388         public $editintro = '';
 389
 390         /** @var null */
 391         public $scrolltop = null;
 392
 393         /** @var bool */
 394         public $bot = true;
 395
 396         /** @var string */
 397         public $contentModel;
 398
 399         /** @var null|string */
 400         public $contentFormat = null;
 401
 402         /** @var null|array */
 403         private $changeTags = null;
 404
 405         # Placeholders for text injection by hooks (must be HTML)
 406         # extensions should take care to _append_ to the present value
 407
 408         /** @var string Before even the preview */
 409         public $editFormPageTop = '';
 410         public $editFormTextTop = '';
 411         public $editFormTextBeforeContent = '';
 412         public $editFormTextAfterWarn = '';
 413         public $editFormTextAfterTools = '';
 414         public $editFormTextBottom = '';
 415         public $editFormTextAfterContent = '';
 416         public $previewTextAfterContent = '';
 417         public $mPreloadContent = null;
 418
 419         /* $didSave should be set to true whenever an article was successfully altered. */
 420         public $didSave = false;
 421         public $undidRev = 0;
 422
 423         public $suppressIntro = false;
 424
 425         /** @var bool */
 426         protected $edit;
 427
 428         /** @var bool|int */
 429         protected $contentLength = false;
 430
 431         /**
 432          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 433          */
 434         private $enableApiEditOverride = false;
 435
 436         /**
 437          * @var IContextSource
 438          */
 439         protected $context;
 440
 441         /**
 442          * @var bool Whether an old revision is edited
 443          */
 444         private $isOldRev = false;
 445
 446         /**
 447          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 448          */
 449         private $unicodeCheck;
 450
 451         /**
 452          * Factory function to create an edit conflict helper
 453          *
 454          * @var callable
 455          */
 456         private $editConflictHelperFactory;
 457
 458         /**
 459          * @var TextConflictHelper|null
 460          */
 461         private $editConflictHelper;
 462
 463         /**
 464          * @param Article $article
 465          */
 466         public function __construct( Article $article ) {
 467                 $this->mArticle = $article;
 468                 $this->page = $article->getPage(); // model object
 469                 $this->mTitle = $article->getTitle();
 470                 $this->context = $article->getContext();
 471
 472                 $this->contentModel = $this->mTitle->getContentModel();
 473
 474                 $handler = ContentHandler::getForModelID( $this->contentModel );
 475                 $this->contentFormat = $handler->getDefaultFormat();
 476                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 477         }
 478
 479         /**
 480          * @return Article
 481          */
 482         public function getArticle() {
 483                 return $this->mArticle;
 484         }
 485
 486         /**
 487          * @since 1.28
 488          * @return IContextSource
 489          */
 490         public function getContext() {
 491                 return $this->context;
 492         }
 493
 494         /**
 495          * @since 1.19
 496          * @return Title
 497          */
 498         public function getTitle() {
 499                 return $this->mTitle;
 500         }
 501
 502         /**
 503          * Set the context Title object
 504          *
 505          * @param Title|null $title Title object or null
 506          */
 507         public function setContextTitle( $title ) {
 508                 $this->mContextTitle = $title;
 509         }
 510
 511         /**
 512          * Get the context title object.
 513          * If not set, $wgTitle will be returned. This behavior might change in
 514          * the future to return $this->mTitle instead.
 515          *
 516          * @return Title
 517          */
 518         public function getContextTitle() {
 519                 if ( is_null( $this->mContextTitle ) ) {
 520                         wfDebugLog(
 521                                 'GlobalTitleFail',
 522                                 __METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
 523                         );
 524                         global $wgTitle;
 525                         return $wgTitle;
 526                 } else {
 527                         return $this->mContextTitle;
 528                 }
 529         }
 530
 531         /**
 532          * Check if the edit page is using OOUI controls
 533          * @return bool Always true
 534          * @deprecated since 1.30
 535          */
 536         public function isOouiEnabled() {
 537                 wfDeprecated( __METHOD__, '1.30' );
 538                 return true;
 539         }
 540
 541         /**
 542          * Returns if the given content model is editable.
 543          *
 544          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 545          * @return bool
 546          * @throws MWException If $modelId has no known handler
 547          */
 548         public function isSupportedContentModel( $modelId ) {
 549                 return $this->enableApiEditOverride === true ||
 550                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 551         }
 552
 553         /**
 554          * Allow editing of content that supports API direct editing, but not general
 555          * direct editing. Set to false by default.
 556          *
 557          * @param bool $enableOverride
 558          */
 559         public function setApiEditOverride( $enableOverride ) {
 560                 $this->enableApiEditOverride = $enableOverride;
 561         }
 562
 563         /**
 564          * @deprecated since 1.29, call edit directly
 565          */
 566         public function submit() {
 567                 wfDeprecated( __METHOD__, '1.29' );
 568                 $this->edit();
 569         }
 570
 571         /**
 572          * This is the function that gets called for "action=edit". It
 573          * sets up various member variables, then passes execution to
 574          * another function, usually showEditForm()
 575          *
 576          * The edit form is self-submitting, so that when things like
 577          * preview and edit conflicts occur, we get the same form back
 578          * with the extra stuff added.  Only when the final submission
 579          * is made and all is well do we actually save and redirect to
 580          * the newly-edited page.
 581          */
 582         public function edit() {
 583                 // Allow extensions to modify/prevent this form or submission
 584                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 585                         return;
 586                 }
 587
 588                 wfDebug( __METHOD__ . ": enter\n" );
 589
 590                 $request = $this->context->getRequest();
 591                 // If they used redlink=1 and the page exists, redirect to the main article
 592                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 593                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 594                         return;
 595                 }
 596
 597                 $this->importFormData( $request );
 598                 $this->firsttime = false;
 599
 600                 if ( wfReadOnly() && $this->save ) {
 601                         // Force preview
 602                         $this->save = false;
 603                         $this->preview = true;
 604                 }
 605
 606                 if ( $this->save ) {
 607                         $this->formtype = 'save';
 608                 } elseif ( $this->preview ) {
 609                         $this->formtype = 'preview';
 610                 } elseif ( $this->diff ) {
 611                         $this->formtype = 'diff';
 612                 } else { # First time through
 613                         $this->firsttime = true;
 614                         if ( $this->previewOnOpen() ) {
 615                                 $this->formtype = 'preview';
 616                         } else {
 617                                 $this->formtype = 'initial';
 618                         }
 619                 }
 620
 621                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 622                 if ( $permErrors ) {
 623                         wfDebug( __METHOD__ . ": User can't edit\n" );
 624                         // Auto-block user's IP if the account was "hard" blocked
 625                         if ( !wfReadOnly() ) {
 626                                 DeferredUpdates::addCallableUpdate( function () {
 627                                         $this->context->getUser()->spreadAnyEditBlock();
 628                                 } );
 629                         }
 630                         $this->displayPermissionsError( $permErrors );
 631
 632                         return;
 633                 }
 634
 635                 $revision = $this->mArticle->getRevisionFetched();
 636                 // Disallow editing revisions with content models different from the current one
 637                 // Undo edits being an exception in order to allow reverting content model changes.
 638                 if ( $revision
 639                         && $revision->getContentModel() !== $this->contentModel
 640                 ) {
 641                         $prevRev = null;
 642                         if ( $this->undidRev ) {
 643                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 644                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 645                         }
 646                         if ( !$this->undidRev
 647                                 || !$prevRev
 648                                 || $prevRev->getContentModel() !== $this->contentModel
 649                         ) {
 650                                 $this->displayViewSourcePage(
 651                                         $this->getContentObject(),
 652                                         $this->context->msg(
 653                                                 'contentmodelediterror',
 654                                                 $revision->getContentModel(),
 655                                                 $this->contentModel
 656                                         )->plain()
 657                                 );
 658                                 return;
 659                         }
 660                 }
 661
 662                 $this->isConflict = false;
 663                 // css / js subpages of user pages get a special treatment
 664                 // The following member variables are deprecated since 1.30,
 665                 // the functions should be used instead.
 666                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 667                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 668                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 669                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 670
 671                 # Show applicable editing introductions
 672                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 673                         $this->showIntro();
 674                 }
 675
 676                 # Attempt submission here.  This will check for edit conflicts,
 677                 # and redundantly check for locked database, blocked IPs, etc.
 678                 # that edit() already checked just in case someone tries to sneak
 679                 # in the back door with a hand-edited submission URL.
 680
 681                 if ( 'save' == $this->formtype ) {
 682                         $resultDetails = null;
 683                         $status = $this->attemptSave( $resultDetails );
 684                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 685                                 return;
 686                         }
 687                 }
 688
 689                 # First time through: get contents, set time for conflict
 690                 # checking, etc.
 691                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 692                         if ( $this->initialiseForm() === false ) {
 693                                 $this->noSuchSectionPage();
 694                                 return;
 695                         }
 696
 697                         if ( !$this->mTitle->getArticleID() ) {
 698                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 699                         } else {
 700                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 701                         }
 702
 703                 }
 704
 705                 $this->showEditForm();
 706         }
 707
 708         /**
 709          * @param string $rigor Same format as Title::getUserPermissionErrors()
 710          * @return array
 711          */
 712         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 713                 $user = $this->context->getUser();
 714                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 715                 # Can this title be created?
 716                 if ( !$this->mTitle->exists() ) {
 717                         $permErrors = array_merge(
 718                                 $permErrors,
 719                                 wfArrayDiff2(
 720                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 721                                         $permErrors
 722                                 )
 723                         );
 724                 }
 725                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 726                 $remove = [];
 727                 foreach ( $permErrors as $error ) {
 728                         if ( ( $this->preview || $this->diff )
 729                                 && (
 730                                         $error[0] == 'blockedtext' ||
 731                                         $error[0] == 'autoblockedtext' ||
 732                                         $error[0] == 'systemblockedtext'
 733                                 )
 734                         ) {
 735                                 $remove[] = $error;
 736                         }
 737                 }
 738                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 739
 740                 return $permErrors;
 741         }
 742
 743         /**
 744          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 745          * but with the following differences:
 746          * - If redlink=1, the user will be redirected to the page
 747          * - If there is content to display or the error occurs while either saving,
 748          *   previewing or showing the difference, it will be a
 749          *   "View source for ..." page displaying the source code after the error message.
 750          *
 751          * @since 1.19
 752          * @param array $permErrors Array of permissions errors, as returned by
 753          *    Title::getUserPermissionsErrors().
 754          * @throws PermissionsError
 755          */
 756         protected function displayPermissionsError( array $permErrors ) {
 757                 $out = $this->context->getOutput();
 758                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 759                         // The edit page was reached via a red link.
 760                         // Redirect to the article page and let them click the edit tab if
 761                         // they really want a permission error.
 762                         $out->redirect( $this->mTitle->getFullURL() );
 763                         return;
 764                 }
 765
 766                 $content = $this->getContentObject();
 767
 768                 # Use the normal message if there's nothing to display
 769                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 770                         $action = $this->mTitle->exists() ? 'edit' :
 771                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 772                         throw new PermissionsError( $action, $permErrors );
 773                 }
 774
 775                 $this->displayViewSourcePage(
 776                         $content,
 777                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 778                 );
 779         }
 780
 781         /**
 782          * Display a read-only View Source page
 783          * @param Content $content content object
 784          * @param string $errorMessage additional wikitext error message to display
 785          */
 786         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 787                 $out = $this->context->getOutput();
 788                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 789
 790                 $out->setRobotPolicy( 'noindex,nofollow' );
 791                 $out->setPageTitle( $this->context->msg(
 792                         'viewsource-title',
 793                         $this->getContextTitle()->getPrefixedText()
 794                 ) );
 795                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 796                 $out->addHTML( $this->editFormPageTop );
 797                 $out->addHTML( $this->editFormTextTop );
 798
 799                 if ( $errorMessage !== '' ) {
 800                         $out->addWikiText( $errorMessage );
 801                         $out->addHTML( "<hr />\n" );
 802                 }
 803
 804                 # If the user made changes, preserve them when showing the markup
 805                 # (This happens when a user is blocked during edit, for instance)
 806                 if ( !$this->firsttime ) {
 807                         $text = $this->textbox1;
 808                         $out->addWikiMsg( 'viewyourtext' );
 809                 } else {
 810                         try {
 811                                 $text = $this->toEditText( $content );
 812                         } catch ( MWException $e ) {
 813                                 # Serialize using the default format if the content model is not supported
 814                                 # (e.g. for an old revision with a different model)
 815                                 $text = $content->serialize();
 816                         }
 817                         $out->addWikiMsg( 'viewsourcetext' );
 818                 }
 819
 820                 $out->addHTML( $this->editFormTextBeforeContent );
 821                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 822                 $out->addHTML( $this->editFormTextAfterContent );
 823
 824                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 825
 826                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 827
 828                 $out->addHTML( $this->editFormTextBottom );
 829                 if ( $this->mTitle->exists() ) {
 830                         $out->returnToMain( null, $this->mTitle );
 831                 }
 832         }
 833
 834         /**
 835          * Should we show a preview when the edit form is first shown?
 836          *
 837          * @return bool
 838          */
 839         protected function previewOnOpen() {
 840                 $config = $this->context->getConfig();
 841                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 842                 $request = $this->context->getRequest();
 843                 if ( $config->get( 'RawHtml' ) ) {
 844                         // If raw HTML is enabled, disable preview on open
 845                         // since it has to be posted with a token for
 846                         // security reasons
 847                         return false;
 848                 }
 849                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 850                         // Explicit override from request
 851                         return true;
 852                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 853                         // Explicit override from request
 854                         return false;
 855                 } elseif ( $this->section == 'new' ) {
 856                         // Nothing *to* preview for new sections
 857                         return false;
 858                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 859                         && $this->context->getUser()->getOption( 'previewonfirst' )
 860                 ) {
 861                         // Standard preference behavior
 862                         return true;
 863                 } elseif ( !$this->mTitle->exists()
 864                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 865                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 866                 ) {
 867                         // Categories are special
 868                         return true;
 869                 } else {
 870                         return false;
 871                 }
 872         }
 873
 874         /**
 875          * Checks whether the user entered a skin name in uppercase,
 876          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 877          *
 878          * @return bool
 879          */
 880         protected function isWrongCaseCssJsPage() {
 881                 if ( $this->mTitle->isCssJsSubpage() ) {
 882                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 883                         $skins = array_merge(
 884                                 array_keys( Skin::getSkinNames() ),
 885                                 [ 'common' ]
 886                         );
 887                         return !in_array( $name, $skins )
 888                                 && in_array( strtolower( $name ), $skins );
 889                 } else {
 890                         return false;
 891                 }
 892         }
 893
 894         /**
 895          * Returns whether section editing is supported for the current page.
 896          * Subclasses may override this to replace the default behavior, which is
 897          * to check ContentHandler::supportsSections.
 898          *
 899          * @return bool True if this edit page supports sections, false otherwise.
 900          */
 901         protected function isSectionEditSupported() {
 902                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 903                 return $contentHandler->supportsSections();
 904         }
 905
 906         /**
 907          * This function collects the form data and uses it to populate various member variables.
 908          * @param WebRequest &$request
 909          * @throws ErrorPageError
 910          */
 911         public function importFormData( &$request ) {
 912                 # Section edit can come from either the form or a link
 913                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 914
 915                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 916                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 917                 }
 918
 919                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 920
 921                 if ( $request->wasPosted() ) {
 922                         # These fields need to be checked for encoding.
 923                         # Also remove trailing whitespace, but don't remove _initial_
 924                         # whitespace from the text boxes. This may be significant formatting.
 925                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 926                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 927                                 // Skip this if wpTextbox2 has input, it indicates that we came
 928                                 // from a conflict page with raw page text, not a custom form
 929                                 // modified by subclasses
 930                                 $textbox1 = $this->importContentFormData( $request );
 931                                 if ( $textbox1 !== null ) {
 932                                         $this->textbox1 = $textbox1;
 933                                 }
 934                         }
 935
 936                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 937
 938                         $this->summary = $request->getText( 'wpSummary' );
 939
 940                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 941                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 942                         # section titles.
 943                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 944
 945                         # Treat sectiontitle the same way as summary.
 946                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 947                         # currently doing double duty as both edit summary and section title. Right now this
 948                         # is just to allow API edits to work around this limitation, but this should be
 949                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 950                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 951                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 952
 953                         $this->edittime = $request->getVal( 'wpEdittime' );
 954                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 955                         $this->starttime = $request->getVal( 'wpStarttime' );
 956
 957                         $undidRev = $request->getInt( 'wpUndidRevision' );
 958                         if ( $undidRev ) {
 959                                 $this->undidRev = $undidRev;
 960                         }
 961
 962                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 963
 964                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 965                                 // wpTextbox1 field is missing, possibly due to being "too big"
 966                                 // according to some filter rules such as Suhosin's setting for
 967                                 // suhosin.request.max_value_length (d'oh)
 968                                 $this->incompleteForm = true;
 969                         } else {
 970                                 // If we receive the last parameter of the request, we can fairly
 971                                 // claim the POST request has not been truncated.
 972
 973                                 // TODO: softened the check for cutover.  Once we determine
 974                                 // that it is safe, we should complete the transition by
 975                                 // removing the "edittime" clause.
 976                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 977                                         && is_null( $this->edittime ) );
 978                         }
 979                         if ( $this->incompleteForm ) {
 980                                 # If the form is incomplete, force to preview.
 981                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 982                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 983                                 $this->preview = true;
 984                         } else {
 985                                 $this->preview = $request->getCheck( 'wpPreview' );
 986                                 $this->diff = $request->getCheck( 'wpDiff' );
 987
 988                                 // Remember whether a save was requested, so we can indicate
 989                                 // if we forced preview due to session failure.
 990                                 $this->mTriedSave = !$this->preview;
 991
 992                                 if ( $this->tokenOk( $request ) ) {
 993                                         # Some browsers will not report any submit button
 994                                         # if the user hits enter in the comment box.
 995                                         # The unmarked state will be assumed to be a save,
 996                                         # if the form seems otherwise complete.
 997                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 998                                 } elseif ( $this->diff ) {
 999                                         # Failed token check, but only requested "Show Changes".
1000                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
1001                                 } else {
1002                                         # Page might be a hack attempt posted from
1003                                         # an external site. Preview instead of saving.
1004                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
1005                                         $this->preview = true;
1006                                 }
1007                         }
1008                         $this->save = !$this->preview && !$this->diff;
1009                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1010                                 $this->edittime = null;
1011                         }
1012
1013                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1014                                 $this->starttime = null;
1015                         }
1016
1017                         $this->recreate = $request->getCheck( 'wpRecreate' );
1018
1019                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1020                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1021
1022                         $user = $this->context->getUser();
1023                         # Don't force edit summaries when a user is editing their own user or talk page
1024                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1025                                 && $this->mTitle->getText() == $user->getName()
1026                         ) {
1027                                 $this->allowBlankSummary = true;
1028                         } else {
1029                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1030                                         || !$user->getOption( 'forceeditsummary' );
1031                         }
1032
1033                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1034
1035                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1036                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1037
1038                         $changeTags = $request->getVal( 'wpChangeTags' );
1039                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1040                                 $this->changeTags = [];
1041                         } else {
1042                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1043                                         $changeTags ) ) );
1044                         }
1045                 } else {
1046                         # Not a posted form? Start with nothing.
1047                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1048                         $this->textbox1 = '';
1049                         $this->summary = '';
1050                         $this->sectiontitle = '';
1051                         $this->edittime = '';
1052                         $this->editRevId = null;
1053                         $this->starttime = wfTimestampNow();
1054                         $this->edit = false;
1055                         $this->preview = false;
1056                         $this->save = false;
1057                         $this->diff = false;
1058                         $this->minoredit = false;
1059                         // Watch may be overridden by request parameters
1060                         $this->watchthis = $request->getBool( 'watchthis', false );
1061                         $this->recreate = false;
1062
1063                         // When creating a new section, we can preload a section title by passing it as the
1064                         // preloadtitle parameter in the URL (T15100)
1065                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1066                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1067                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1068                                 $this->summary = $request->getVal( 'preloadtitle' );
1069                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1070                                 $this->summary = $request->getText( 'summary' );
1071                                 if ( $this->summary !== '' ) {
1072                                         $this->hasPresetSummary = true;
1073                                 }
1074                         }
1075
1076                         if ( $request->getVal( 'minor' ) ) {
1077                                 $this->minoredit = true;
1078                         }
1079                 }
1080
1081                 $this->oldid = $request->getInt( 'oldid' );
1082                 $this->parentRevId = $request->getInt( 'parentRevId' );
1083
1084                 $this->bot = $request->getBool( 'bot', true );
1085                 $this->nosummary = $request->getBool( 'nosummary' );
1086
1087                 // May be overridden by revision.
1088                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1089                 // May be overridden by revision.
1090                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1091
1092                 try {
1093                         $handler = ContentHandler::getForModelID( $this->contentModel );
1094                 } catch ( MWUnknownContentModelException $e ) {
1095                         throw new ErrorPageError(
1096                                 'editpage-invalidcontentmodel-title',
1097                                 'editpage-invalidcontentmodel-text',
1098                                 [ wfEscapeWikiText( $this->contentModel ) ]
1099                         );
1100                 }
1101
1102                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1103                         throw new ErrorPageError(
1104                                 'editpage-notsupportedcontentformat-title',
1105                                 'editpage-notsupportedcontentformat-text',
1106                                 [
1107                                         wfEscapeWikiText( $this->contentFormat ),
1108                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1109                                 ]
1110                         );
1111                 }
1112
1113                 /**
1114                  * @todo Check if the desired model is allowed in this namespace, and if
1115                  *   a transition from the page's current model to the new model is
1116                  *   allowed.
1117                  */
1118
1119                 $this->editintro = $request->getText( 'editintro',
1120                         // Custom edit intro for new sections
1121                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1122
1123                 // Allow extensions to modify form data
1124                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1125         }
1126
1127         /**
1128          * Subpage overridable method for extracting the page content data from the
1129          * posted form to be placed in $this->textbox1, if using customized input
1130          * this method should be overridden and return the page text that will be used
1131          * for saving, preview parsing and so on...
1132          *
1133          * @param WebRequest &$request
1134          * @return string|null
1135          */
1136         protected function importContentFormData( &$request ) {
1137                 return; // Don't do anything, EditPage already extracted wpTextbox1
1138         }
1139
1140         /**
1141          * Initialise form fields in the object
1142          * Called on the first invocation, e.g. when a user clicks an edit link
1143          * @return bool If the requested section is valid
1144          */
1145         public function initialiseForm() {
1146                 $this->edittime = $this->page->getTimestamp();
1147                 $this->editRevId = $this->page->getLatest();
1148
1149                 $content = $this->getContentObject( false ); # TODO: track content object?!
1150                 if ( $content === false ) {
1151                         return false;
1152                 }
1153                 $this->textbox1 = $this->toEditText( $content );
1154
1155                 $user = $this->context->getUser();
1156                 // activate checkboxes if user wants them to be always active
1157                 # Sort out the "watch" checkbox
1158                 if ( $user->getOption( 'watchdefault' ) ) {
1159                         # Watch all edits
1160                         $this->watchthis = true;
1161                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1162                         # Watch creations
1163                         $this->watchthis = true;
1164                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1165                         # Already watched
1166                         $this->watchthis = true;
1167                 }
1168                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1169                         $this->minoredit = true;
1170                 }
1171                 if ( $this->textbox1 === false ) {
1172                         return false;
1173                 }
1174                 return true;
1175         }
1176
1177         /**
1178          * @param Content|null $def_content The default value to return
1179          *
1180          * @return Content|null Content on success, $def_content for invalid sections
1181          *
1182          * @since 1.21
1183          */
1184         protected function getContentObject( $def_content = null ) {
1185                 global $wgContLang;
1186
1187                 $content = false;
1188
1189                 $user = $this->context->getUser();
1190                 $request = $this->context->getRequest();
1191                 // For message page not locally set, use the i18n message.
1192                 // For other non-existent articles, use preload text if any.
1193                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1194                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1195                                 # If this is a system message, get the default text.
1196                                 $msg = $this->mTitle->getDefaultMessageText();
1197
1198                                 $content = $this->toEditContent( $msg );
1199                         }
1200                         if ( $content === false ) {
1201                                 # If requested, preload some text.
1202                                 $preload = $request->getVal( 'preload',
1203                                         // Custom preload text for new sections
1204                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1205                                 $params = $request->getArray( 'preloadparams', [] );
1206
1207                                 $content = $this->getPreloadedContent( $preload, $params );
1208                         }
1209                 // For existing pages, get text based on "undo" or section parameters.
1210                 } else {
1211                         if ( $this->section != '' ) {
1212                                 // Get section edit text (returns $def_text for invalid sections)
1213                                 $orig = $this->getOriginalContent( $user );
1214                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1215
1216                                 if ( !$content ) {
1217                                         $content = $def_content;
1218                                 }
1219                         } else {
1220                                 $undoafter = $request->getInt( 'undoafter' );
1221                                 $undo = $request->getInt( 'undo' );
1222
1223                                 if ( $undo > 0 && $undoafter > 0 ) {
1224                                         $undorev = Revision::newFromId( $undo );
1225                                         $oldrev = Revision::newFromId( $undoafter );
1226
1227                                         # Sanity check, make sure it's the right page,
1228                                         # the revisions exist and they were not deleted.
1229                                         # Otherwise, $content will be left as-is.
1230                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1231                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1232                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1233                                         ) {
1234                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1235
1236                                                 if ( $content === false ) {
1237                                                         # Warn the user that something went wrong
1238                                                         $undoMsg = 'failure';
1239                                                 } else {
1240                                                         $oldContent = $this->page->getContent( Revision::RAW );
1241                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1242                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1243                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1244                                                                 // The undo may change content
1245                                                                 // model if its reverting the top
1246                                                                 // edit. This can result in
1247                                                                 // mismatched content model/format.
1248                                                                 $this->contentModel = $newContent->getModel();
1249                                                                 $this->contentFormat = $oldrev->getContentFormat();
1250                                                         }
1251
1252                                                         if ( $newContent->equals( $oldContent ) ) {
1253                                                                 # Tell the user that the undo results in no change,
1254                                                                 # i.e. the revisions were already undone.
1255                                                                 $undoMsg = 'nochange';
1256                                                                 $content = false;
1257                                                         } else {
1258                                                                 # Inform the user of our success and set an automatic edit summary
1259                                                                 $undoMsg = 'success';
1260
1261                                                                 # If we just undid one rev, use an autosummary
1262                                                                 $firstrev = $oldrev->getNext();
1263                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1264                                                                         $userText = $undorev->getUserText();
1265                                                                         if ( $userText === '' ) {
1266                                                                                 $undoSummary = $this->context->msg(
1267                                                                                         'undo-summary-username-hidden',
1268                                                                                         $undo
1269                                                                                 )->inContentLanguage()->text();
1270                                                                         } else {
1271                                                                                 $undoSummary = $this->context->msg(
1272                                                                                         'undo-summary',
1273                                                                                         $undo,
1274                                                                                         $userText
1275                                                                                 )->inContentLanguage()->text();
1276                                                                         }
1277                                                                         if ( $this->summary === '' ) {
1278                                                                                 $this->summary = $undoSummary;
1279                                                                         } else {
1280                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1281                                                                                         ->inContentLanguage()->text() . $this->summary;
1282                                                                         }
1283                                                                         $this->undidRev = $undo;
1284                                                                 }
1285                                                                 $this->formtype = 'diff';
1286                                                         }
1287                                                 }
1288                                         } else {
1289                                                 // Failed basic sanity checks.
1290                                                 // Older revisions may have been removed since the link
1291                                                 // was created, or we may simply have got bogus input.
1292                                                 $undoMsg = 'norev';
1293                                         }
1294
1295                                         $out = $this->context->getOutput();
1296                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1297                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1298                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1299                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1300                                 }
1301
1302                                 if ( $content === false ) {
1303                                         $content = $this->getOriginalContent( $user );
1304                                 }
1305                         }
1306                 }
1307
1308                 return $content;
1309         }
1310
1311         /**
1312          * Get the content of the wanted revision, without section extraction.
1313          *
1314          * The result of this function can be used to compare user's input with
1315          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1316          * to the original text of the edit.
1317          *
1318          * This differs from Article::getContent() that when a missing revision is
1319          * encountered the result will be null and not the
1320          * 'missing-revision' message.
1321          *
1322          * @since 1.19
1323          * @param User $user The user to get the revision for
1324          * @return Content|null
1325          */
1326         private function getOriginalContent( User $user ) {
1327                 if ( $this->section == 'new' ) {
1328                         return $this->getCurrentContent();
1329                 }
1330                 $revision = $this->mArticle->getRevisionFetched();
1331                 if ( $revision === null ) {
1332                         $handler = ContentHandler::getForModelID( $this->contentModel );
1333                         return $handler->makeEmptyContent();
1334                 }
1335                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1336                 return $content;
1337         }
1338
1339         /**
1340          * Get the edit's parent revision ID
1341          *
1342          * The "parent" revision is the ancestor that should be recorded in this
1343          * page's revision history.  It is either the revision ID of the in-memory
1344          * article content, or in the case of a 3-way merge in order to rebase
1345          * across a recoverable edit conflict, the ID of the newer revision to
1346          * which we have rebased this page.
1347          *
1348          * @since 1.27
1349          * @return int Revision ID
1350          */
1351         public function getParentRevId() {
1352                 if ( $this->parentRevId ) {
1353                         return $this->parentRevId;
1354                 } else {
1355                         return $this->mArticle->getRevIdFetched();
1356                 }
1357         }
1358
1359         /**
1360          * Get the current content of the page. This is basically similar to
1361          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1362          * content object is returned instead of null.
1363          *
1364          * @since 1.21
1365          * @return Content
1366          */
1367         protected function getCurrentContent() {
1368                 $rev = $this->page->getRevision();
1369                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1370
1371                 if ( $content === false || $content === null ) {
1372                         $handler = ContentHandler::getForModelID( $this->contentModel );
1373                         return $handler->makeEmptyContent();
1374                 } elseif ( !$this->undidRev ) {
1375                         // Content models should always be the same since we error
1376                         // out if they are different before this point (in ->edit()).
1377                         // The exception being, during an undo, the current revision might
1378                         // differ from the prior revision.
1379                         $logger = LoggerFactory::getInstance( 'editpage' );
1380                         if ( $this->contentModel !== $rev->getContentModel() ) {
1381                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1382                                         'prev' => $this->contentModel,
1383                                         'new' => $rev->getContentModel(),
1384                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1385                                         'method' => __METHOD__
1386                                 ] );
1387                                 $this->contentModel = $rev->getContentModel();
1388                         }
1389
1390                         // Given that the content models should match, the current selected
1391                         // format should be supported.
1392                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1393                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1394
1395                                         'prev' => $this->contentFormat,
1396                                         'new' => $rev->getContentFormat(),
1397                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1398                                         'method' => __METHOD__
1399                                 ] );
1400                                 $this->contentFormat = $rev->getContentFormat();
1401                         }
1402                 }
1403                 return $content;
1404         }
1405
1406         /**
1407          * Use this method before edit() to preload some content into the edit box
1408          *
1409          * @param Content $content
1410          *
1411          * @since 1.21
1412          */
1413         public function setPreloadedContent( Content $content ) {
1414                 $this->mPreloadContent = $content;
1415         }
1416
1417         /**
1418          * Get the contents to be preloaded into the box, either set by
1419          * an earlier setPreloadText() or by loading the given page.
1420          *
1421          * @param string $preload Representing the title to preload from.
1422          * @param array $params Parameters to use (interface-message style) in the preloaded text
1423          *
1424          * @return Content
1425          *
1426          * @since 1.21
1427          */
1428         protected function getPreloadedContent( $preload, $params = [] ) {
1429                 if ( !empty( $this->mPreloadContent ) ) {
1430                         return $this->mPreloadContent;
1431                 }
1432
1433                 $handler = ContentHandler::getForModelID( $this->contentModel );
1434
1435                 if ( $preload === '' ) {
1436                         return $handler->makeEmptyContent();
1437                 }
1438
1439                 $user = $this->context->getUser();
1440                 $title = Title::newFromText( $preload );
1441                 # Check for existence to avoid getting MediaWiki:Noarticletext
1442                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1443                         // TODO: somehow show a warning to the user!
1444                         return $handler->makeEmptyContent();
1445                 }
1446
1447                 $page = WikiPage::factory( $title );
1448                 if ( $page->isRedirect() ) {
1449                         $title = $page->getRedirectTarget();
1450                         # Same as before
1451                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1452                                 // TODO: somehow show a warning to the user!
1453                                 return $handler->makeEmptyContent();
1454                         }
1455                         $page = WikiPage::factory( $title );
1456                 }
1457
1458                 $parserOptions = ParserOptions::newFromUser( $user );
1459                 $content = $page->getContent( Revision::RAW );
1460
1461                 if ( !$content ) {
1462                         // TODO: somehow show a warning to the user!
1463                         return $handler->makeEmptyContent();
1464                 }
1465
1466                 if ( $content->getModel() !== $handler->getModelID() ) {
1467                         $converted = $content->convert( $handler->getModelID() );
1468
1469                         if ( !$converted ) {
1470                                 // TODO: somehow show a warning to the user!
1471                                 wfDebug( "Attempt to preload incompatible content: " .
1472                                         "can't convert " . $content->getModel() .
1473                                         " to " . $handler->getModelID() );
1474
1475                                 return $handler->makeEmptyContent();
1476                         }
1477
1478                         $content = $converted;
1479                 }
1480
1481                 return $content->preloadTransform( $title, $parserOptions, $params );
1482         }
1483
1484         /**
1485          * Make sure the form isn't faking a user's credentials.
1486          *
1487          * @param WebRequest &$request
1488          * @return bool
1489          * @private
1490          */
1491         public function tokenOk( &$request ) {
1492                 $token = $request->getVal( 'wpEditToken' );
1493                 $user = $this->context->getUser();
1494                 $this->mTokenOk = $user->matchEditToken( $token );
1495                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1496                 return $this->mTokenOk;
1497         }
1498
1499         /**
1500          * Sets post-edit cookie indicating the user just saved a particular revision.
1501          *
1502          * This uses a temporary cookie for each revision ID so separate saves will never
1503          * interfere with each other.
1504          *
1505          * Article::view deletes the cookie on server-side after the redirect and
1506          * converts the value to the global JavaScript variable wgPostEdit.
1507          *
1508          * If the variable were set on the server, it would be cached, which is unwanted
1509          * since the post-edit state should only apply to the load right after the save.
1510          *
1511          * @param int $statusValue The status value (to check for new article status)
1512          */
1513         protected function setPostEditCookie( $statusValue ) {
1514                 $revisionId = $this->page->getLatest();
1515                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1516
1517                 $val = 'saved';
1518                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1519                         $val = 'created';
1520                 } elseif ( $this->oldid ) {
1521                         $val = 'restored';
1522                 }
1523
1524                 $response = $this->context->getRequest()->response();
1525                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1526         }
1527
1528         /**
1529          * Attempt submission
1530          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1531          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1532          * @return Status The resulting status object.
1533          */
1534         public function attemptSave( &$resultDetails = false ) {
1535                 # Allow bots to exempt some edits from bot flagging
1536                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1537                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1538
1539                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1540
1541                 return $status;
1542         }
1543
1544         /**
1545          * Log when a page was successfully saved after the edit conflict view
1546          */
1547         private function incrementResolvedConflicts() {
1548                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1549                         return;
1550                 }
1551
1552                 $this->getEditConflictHelper()->incrementResolvedStats();
1553         }
1554
1555         /**
1556          * Handle status, such as after attempt save
1557          *
1558          * @param Status $status
1559          * @param array|bool $resultDetails
1560          *
1561          * @throws ErrorPageError
1562          * @return bool False, if output is done, true if rest of the form should be displayed
1563          */
1564         private function handleStatus( Status $status, $resultDetails ) {
1565                 /**
1566                  * @todo FIXME: once the interface for internalAttemptSave() is made
1567                  *   nicer, this should use the message in $status
1568                  */
1569                 if ( $status->value == self::AS_SUCCESS_UPDATE
1570                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1571                 ) {
1572                         $this->incrementResolvedConflicts();
1573
1574                         $this->didSave = true;
1575                         if ( !$resultDetails['nullEdit'] ) {
1576                                 $this->setPostEditCookie( $status->value );
1577                         }
1578                 }
1579
1580                 $out = $this->context->getOutput();
1581
1582                 // "wpExtraQueryRedirect" is a hidden input to modify
1583                 // after save URL and is not used by actual edit form
1584                 $request = $this->context->getRequest();
1585                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1586
1587                 switch ( $status->value ) {
1588                         case self::AS_HOOK_ERROR_EXPECTED:
1589                         case self::AS_CONTENT_TOO_BIG:
1590                         case self::AS_ARTICLE_WAS_DELETED:
1591                         case self::AS_CONFLICT_DETECTED:
1592                         case self::AS_SUMMARY_NEEDED:
1593                         case self::AS_TEXTBOX_EMPTY:
1594                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1595                         case self::AS_END:
1596                         case self::AS_BLANK_ARTICLE:
1597                         case self::AS_SELF_REDIRECT:
1598                                 return true;
1599
1600                         case self::AS_HOOK_ERROR:
1601                                 return false;
1602
1603                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1604                         case self::AS_PARSE_ERROR:
1605                         case self::AS_UNICODE_NOT_SUPPORTED:
1606                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1607                                 return true;
1608
1609                         case self::AS_SUCCESS_NEW_ARTICLE:
1610                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1611                                 if ( $extraQueryRedirect ) {
1612                                         if ( $query === '' ) {
1613                                                 $query = $extraQueryRedirect;
1614                                         } else {
1615                                                 $query = $query . '&' . $extraQueryRedirect;
1616                                         }
1617                                 }
1618                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1619                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1620                                 return false;
1621
1622                         case self::AS_SUCCESS_UPDATE:
1623                                 $extraQuery = '';
1624                                 $sectionanchor = $resultDetails['sectionanchor'];
1625
1626                                 // Give extensions a chance to modify URL query on update
1627                                 Hooks::run(
1628                                         'ArticleUpdateBeforeRedirect',
1629                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1630                                 );
1631
1632                                 if ( $resultDetails['redirect'] ) {
1633                                         if ( $extraQuery == '' ) {
1634                                                 $extraQuery = 'redirect=no';
1635                                         } else {
1636                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1637                                         }
1638                                 }
1639                                 if ( $extraQueryRedirect ) {
1640                                         if ( $extraQuery === '' ) {
1641                                                 $extraQuery = $extraQueryRedirect;
1642                                         } else {
1643                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1644                                         }
1645                                 }
1646
1647                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1648                                 return false;
1649
1650                         case self::AS_SPAM_ERROR:
1651                                 $this->spamPageWithContent( $resultDetails['spam'] );
1652                                 return false;
1653
1654                         case self::AS_BLOCKED_PAGE_FOR_USER:
1655                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1656
1657                         case self::AS_IMAGE_REDIRECT_ANON:
1658                         case self::AS_IMAGE_REDIRECT_LOGGED:
1659                                 throw new PermissionsError( 'upload' );
1660
1661                         case self::AS_READ_ONLY_PAGE_ANON:
1662                         case self::AS_READ_ONLY_PAGE_LOGGED:
1663                                 throw new PermissionsError( 'edit' );
1664
1665                         case self::AS_READ_ONLY_PAGE:
1666                                 throw new ReadOnlyError;
1667
1668                         case self::AS_RATE_LIMITED:
1669                                 throw new ThrottledError();
1670
1671                         case self::AS_NO_CREATE_PERMISSION:
1672                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1673                                 throw new PermissionsError( $permission );
1674
1675                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1676                                 throw new PermissionsError( 'editcontentmodel' );
1677
1678                         default:
1679                                 // We don't recognize $status->value. The only way that can happen
1680                                 // is if an extension hook aborted from inside ArticleSave.
1681                                 // Render the status object into $this->hookError
1682                                 // FIXME this sucks, we should just use the Status object throughout
1683                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1684                                         '</div>';
1685                                 return true;
1686                 }
1687         }
1688
1689         /**
1690          * Run hooks that can filter edits just before they get saved.
1691          *
1692          * @param Content $content The Content to filter.
1693          * @param Status $status For reporting the outcome to the caller
1694          * @param User $user The user performing the edit
1695          *
1696          * @return bool
1697          */
1698         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1699                 // Run old style post-section-merge edit filter
1700                 if ( $this->hookError != '' ) {
1701                         # ...or the hook could be expecting us to produce an error
1702                         $status->fatal( 'hookaborted' );
1703                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1704                         return false;
1705                 }
1706
1707                 // Run new style post-section-merge edit filter
1708                 if ( !Hooks::run( 'EditFilterMergedContent',
1709                                 [ $this->context, $content, $status, $this->summary,
1710                                 $user, $this->minoredit ] )
1711                 ) {
1712                         # Error messages etc. could be handled within the hook...
1713                         if ( $status->isGood() ) {
1714                                 $status->fatal( 'hookaborted' );
1715                                 // Not setting $this->hookError here is a hack to allow the hook
1716                                 // to cause a return to the edit page without $this->hookError
1717                                 // being set. This is used by ConfirmEdit to display a captcha
1718                                 // without any error message cruft.
1719                         } else {
1720                                 $this->hookError = $status->getWikiText();
1721                         }
1722                         // Use the existing $status->value if the hook set it
1723                         if ( !$status->value ) {
1724                                 $status->value = self::AS_HOOK_ERROR;
1725                         }
1726                         return false;
1727                 } elseif ( !$status->isOK() ) {
1728                         # ...or the hook could be expecting us to produce an error
1729                         // FIXME this sucks, we should just use the Status object throughout
1730                         $this->hookError = $status->getWikiText();
1731                         $status->fatal( 'hookaborted' );
1732                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1733                         return false;
1734                 }
1735
1736                 return true;
1737         }
1738
1739         /**
1740          * Return the summary to be used for a new section.
1741          *
1742          * @param string $sectionanchor Set to the section anchor text
1743          * @return string
1744          */
1745         private function newSectionSummary( &$sectionanchor = null ) {
1746                 global $wgParser;
1747
1748                 if ( $this->sectiontitle !== '' ) {
1749                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1750                         // If no edit summary was specified, create one automatically from the section
1751                         // title and have it link to the new section. Otherwise, respect the summary as
1752                         // passed.
1753                         if ( $this->summary === '' ) {
1754                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1755                                 return $this->context->msg( 'newsectionsummary' )
1756                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1757                         }
1758                 } elseif ( $this->summary !== '' ) {
1759                         $sectionanchor = $this->guessSectionName( $this->summary );
1760                         # This is a new section, so create a link to the new section
1761                         # in the revision summary.
1762                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1763                         return $this->context->msg( 'newsectionsummary' )
1764                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1765                 }
1766                 return $this->summary;
1767         }
1768
1769         /**
1770          * Attempt submission (no UI)
1771          *
1772          * @param array &$result Array to add statuses to, currently with the
1773          *   possible keys:
1774          *   - spam (string): Spam string from content if any spam is detected by
1775          *     matchSpamRegex.
1776          *   - sectionanchor (string): Section anchor for a section save.
1777          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1778          *     false otherwise.
1779          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1780          *     revision is a redirect.
1781          * @param bool $bot True if edit is being made under the bot right.
1782          *
1783          * @return Status Status object, possibly with a message, but always with
1784          *   one of the AS_* constants in $status->value,
1785          *
1786          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1787          *   various error display idiosyncrasies. There are also lots of cases
1788          *   where error metadata is set in the object and retrieved later instead
1789          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1790          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1791          * time.
1792          */
1793         public function internalAttemptSave( &$result, $bot = false ) {
1794                 $status = Status::newGood();
1795                 $user = $this->context->getUser();
1796
1797                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1798                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1799                         $status->fatal( 'hookaborted' );
1800                         $status->value = self::AS_HOOK_ERROR;
1801                         return $status;
1802                 }
1803
1804                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1805                         $status->fatal( 'unicode-support-fail' );
1806                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1807                         return $status;
1808                 }
1809
1810                 $request = $this->context->getRequest();
1811                 $spam = $request->getText( 'wpAntispam' );
1812                 if ( $spam !== '' ) {
1813                         wfDebugLog(
1814                                 'SimpleAntiSpam',
1815                                 $user->getName() .
1816                                 ' editing "' .
1817                                 $this->mTitle->getPrefixedText() .
1818                                 '" submitted bogus field "' .
1819                                 $spam .
1820                                 '"'
1821                         );
1822                         $status->fatal( 'spamprotectionmatch', false );
1823                         $status->value = self::AS_SPAM_ERROR;
1824                         return $status;
1825                 }
1826
1827                 try {
1828                         # Construct Content object
1829                         $textbox_content = $this->toEditContent( $this->textbox1 );
1830                 } catch ( MWContentSerializationException $ex ) {
1831                         $status->fatal(
1832                                 'content-failed-to-parse',
1833                                 $this->contentModel,
1834                                 $this->contentFormat,
1835                                 $ex->getMessage()
1836                         );
1837                         $status->value = self::AS_PARSE_ERROR;
1838                         return $status;
1839                 }
1840
1841                 # Check image redirect
1842                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1843                         $textbox_content->isRedirect() &&
1844                         !$user->isAllowed( 'upload' )
1845                 ) {
1846                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1847                                 $status->setResult( false, $code );
1848
1849                                 return $status;
1850                 }
1851
1852                 # Check for spam
1853                 $match = self::matchSummarySpamRegex( $this->summary );
1854                 if ( $match === false && $this->section == 'new' ) {
1855                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1856                         # regular summaries, it is added to the actual wikitext.
1857                         if ( $this->sectiontitle !== '' ) {
1858                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1859                                 $match = self::matchSpamRegex( $this->sectiontitle );
1860                         } else {
1861                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1862                                 # is used with the 'summary' parameter.
1863                                 $match = self::matchSpamRegex( $this->summary );
1864                         }
1865                 }
1866                 if ( $match === false ) {
1867                         $match = self::matchSpamRegex( $this->textbox1 );
1868                 }
1869                 if ( $match !== false ) {
1870                         $result['spam'] = $match;
1871                         $ip = $request->getIP();
1872                         $pdbk = $this->mTitle->getPrefixedDBkey();
1873                         $match = str_replace( "\n", '', $match );
1874                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1875                         $status->fatal( 'spamprotectionmatch', $match );
1876                         $status->value = self::AS_SPAM_ERROR;
1877                         return $status;
1878                 }
1879                 if ( !Hooks::run(
1880                         'EditFilter',
1881                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1882                 ) {
1883                         # Error messages etc. could be handled within the hook...
1884                         $status->fatal( 'hookaborted' );
1885                         $status->value = self::AS_HOOK_ERROR;
1886                         return $status;
1887                 } elseif ( $this->hookError != '' ) {
1888                         # ...or the hook could be expecting us to produce an error
1889                         $status->fatal( 'hookaborted' );
1890                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1891                         return $status;
1892                 }
1893
1894                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1895                         // Auto-block user's IP if the account was "hard" blocked
1896                         if ( !wfReadOnly() ) {
1897                                 $user->spreadAnyEditBlock();
1898                         }
1899                         # Check block state against master, thus 'false'.
1900                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1901                         return $status;
1902                 }
1903
1904                 $this->contentLength = strlen( $this->textbox1 );
1905                 $config = $this->context->getConfig();
1906                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1907                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1908                         // Error will be displayed by showEditForm()
1909                         $this->tooBig = true;
1910                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1911                         return $status;
1912                 }
1913
1914                 if ( !$user->isAllowed( 'edit' ) ) {
1915                         if ( $user->isAnon() ) {
1916                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1917                                 return $status;
1918                         } else {
1919                                 $status->fatal( 'readonlytext' );
1920                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1921                                 return $status;
1922                         }
1923                 }
1924
1925                 $changingContentModel = false;
1926                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1927                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1928                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1929                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1930                                 return $status;
1931                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1932                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1933                                 return $status;
1934                         }
1935                         // Make sure the user can edit the page under the new content model too
1936                         $titleWithNewContentModel = clone $this->mTitle;
1937                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1938                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1939                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1940                         ) {
1941                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1942                                 return $status;
1943                         }
1944
1945                         $changingContentModel = true;
1946                         $oldContentModel = $this->mTitle->getContentModel();
1947                 }
1948
1949                 if ( $this->changeTags ) {
1950                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1951                                 $this->changeTags, $user );
1952                         if ( !$changeTagsStatus->isOK() ) {
1953                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1954                                 return $changeTagsStatus;
1955                         }
1956                 }
1957
1958                 if ( wfReadOnly() ) {
1959                         $status->fatal( 'readonlytext' );
1960                         $status->value = self::AS_READ_ONLY_PAGE;
1961                         return $status;
1962                 }
1963                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1964                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1965                 ) {
1966                         $status->fatal( 'actionthrottledtext' );
1967                         $status->value = self::AS_RATE_LIMITED;
1968                         return $status;
1969                 }
1970
1971                 # If the article has been deleted while editing, don't save it without
1972                 # confirmation
1973                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1974                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1975                         return $status;
1976                 }
1977
1978                 # Load the page data from the master. If anything changes in the meantime,
1979                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1980                 $this->page->loadPageData( 'fromdbmaster' );
1981                 $new = !$this->page->exists();
1982
1983                 if ( $new ) {
1984                         // Late check for create permission, just in case *PARANOIA*
1985                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1986                                 $status->fatal( 'nocreatetext' );
1987                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1988                                 wfDebug( __METHOD__ . ": no create permission\n" );
1989                                 return $status;
1990                         }
1991
1992                         // Don't save a new page if it's blank or if it's a MediaWiki:
1993                         // message with content equivalent to default (allow empty pages
1994                         // in this case to disable messages, see T52124)
1995                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1996                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1997                                 $defaultText = $defaultMessageText;
1998                         } else {
1999                                 $defaultText = '';
2000                         }
2001
2002                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2003                                 $this->blankArticle = true;
2004                                 $status->fatal( 'blankarticle' );
2005                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2006                                 return $status;
2007                         }
2008
2009                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2010                                 return $status;
2011                         }
2012
2013                         $content = $textbox_content;
2014
2015                         $result['sectionanchor'] = '';
2016                         if ( $this->section == 'new' ) {
2017                                 if ( $this->sectiontitle !== '' ) {
2018                                         // Insert the section title above the content.
2019                                         $content = $content->addSectionHeader( $this->sectiontitle );
2020                                 } elseif ( $this->summary !== '' ) {
2021                                         // Insert the section title above the content.
2022                                         $content = $content->addSectionHeader( $this->summary );
2023                                 }
2024                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2025                         }
2026
2027                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2028
2029                 } else { # not $new
2030
2031                         # Article exists. Check for edit conflict.
2032
2033                         $this->page->clear(); # Force reload of dates, etc.
2034                         $timestamp = $this->page->getTimestamp();
2035                         $latest = $this->page->getLatest();
2036
2037                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2038
2039                         // Check editRevId if set, which handles same-second timestamp collisions
2040                         if ( $timestamp != $this->edittime
2041                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2042                         ) {
2043                                 $this->isConflict = true;
2044                                 if ( $this->section == 'new' ) {
2045                                         if ( $this->page->getUserText() == $user->getName() &&
2046                                                 $this->page->getComment() == $this->newSectionSummary()
2047                                         ) {
2048                                                 // Probably a duplicate submission of a new comment.
2049                                                 // This can happen when CDN resends a request after
2050                                                 // a timeout but the first one actually went through.
2051                                                 wfDebug( __METHOD__
2052                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2053                                         } else {
2054                                                 // New comment; suppress conflict.
2055                                                 $this->isConflict = false;
2056                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2057                                         }
2058                                 } elseif ( $this->section == ''
2059                                         && Revision::userWasLastToEdit(
2060                                                 DB_MASTER, $this->mTitle->getArticleID(),
2061                                                 $user->getId(), $this->edittime
2062                                         )
2063                                 ) {
2064                                         # Suppress edit conflict with self, except for section edits where merging is required.
2065                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2066                                         $this->isConflict = false;
2067                                 }
2068                         }
2069
2070                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2071                         if ( $this->sectiontitle !== '' ) {
2072                                 $sectionTitle = $this->sectiontitle;
2073                         } else {
2074                                 $sectionTitle = $this->summary;
2075                         }
2076
2077                         $content = null;
2078
2079                         if ( $this->isConflict ) {
2080                                 wfDebug( __METHOD__
2081                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2082                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2083                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2084                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2085                                 if ( $this->editRevId !== null ) {
2086                                         $content = $this->page->replaceSectionAtRev(
2087                                                 $this->section,
2088                                                 $textbox_content,
2089                                                 $sectionTitle,
2090                                                 $this->editRevId
2091                                         );
2092                                 } else {
2093                                         $content = $this->page->replaceSectionContent(
2094                                                 $this->section,
2095                                                 $textbox_content,
2096                                                 $sectionTitle,
2097                                                 $this->edittime
2098                                         );
2099                                 }
2100                         } else {
2101                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2102                                 $content = $this->page->replaceSectionContent(
2103                                         $this->section,
2104                                         $textbox_content,
2105                                         $sectionTitle
2106                                 );
2107                         }
2108
2109                         if ( is_null( $content ) ) {
2110                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2111                                 $this->isConflict = true;
2112                                 $content = $textbox_content; // do not try to merge here!
2113                         } elseif ( $this->isConflict ) {
2114                                 # Attempt merge
2115                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2116                                         // Successful merge! Maybe we should tell the user the good news?
2117                                         $this->isConflict = false;
2118                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2119                                 } else {
2120                                         $this->section = '';
2121                                         $this->textbox1 = ContentHandler::getContentText( $content );
2122                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2123                                 }
2124                         }
2125
2126                         if ( $this->isConflict ) {
2127                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2128                                 return $status;
2129                         }
2130
2131                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2132                                 return $status;
2133                         }
2134
2135                         if ( $this->section == 'new' ) {
2136                                 // Handle the user preference to force summaries here
2137                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2138                                         $this->missingSummary = true;
2139                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2140                                         $status->value = self::AS_SUMMARY_NEEDED;
2141                                         return $status;
2142                                 }
2143
2144                                 // Do not allow the user to post an empty comment
2145                                 if ( $this->textbox1 == '' ) {
2146                                         $this->missingComment = true;
2147                                         $status->fatal( 'missingcommenttext' );
2148                                         $status->value = self::AS_TEXTBOX_EMPTY;
2149                                         return $status;
2150                                 }
2151                         } elseif ( !$this->allowBlankSummary
2152                                 && !$content->equals( $this->getOriginalContent( $user ) )
2153                                 && !$content->isRedirect()
2154                                 && md5( $this->summary ) == $this->autoSumm
2155                         ) {
2156                                 $this->missingSummary = true;
2157                                 $status->fatal( 'missingsummary' );
2158                                 $status->value = self::AS_SUMMARY_NEEDED;
2159                                 return $status;
2160                         }
2161
2162                         # All's well
2163                         $sectionanchor = '';
2164                         if ( $this->section == 'new' ) {
2165                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2166                         } elseif ( $this->section != '' ) {
2167                                 # Try to get a section anchor from the section source, redirect
2168                                 # to edited section if header found.
2169                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2170                                 # for duplicate heading checking and maybe parsing.
2171                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2172                                 # We can't deal with anchors, includes, html etc in the header for now,
2173                                 # headline would need to be parsed to improve this.
2174                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2175                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2176                                 }
2177                         }
2178                         $result['sectionanchor'] = $sectionanchor;
2179
2180                         // Save errors may fall down to the edit form, but we've now
2181                         // merged the section into full text. Clear the section field
2182                         // so that later submission of conflict forms won't try to
2183                         // replace that into a duplicated mess.
2184                         $this->textbox1 = $this->toEditText( $content );
2185                         $this->section = '';
2186
2187                         $status->value = self::AS_SUCCESS_UPDATE;
2188                 }
2189
2190                 if ( !$this->allowSelfRedirect
2191                         && $content->isRedirect()
2192                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2193                 ) {
2194                         // If the page already redirects to itself, don't warn.
2195                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2196                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2197                                 $this->selfRedirect = true;
2198                                 $status->fatal( 'selfredirect' );
2199                                 $status->value = self::AS_SELF_REDIRECT;
2200                                 return $status;
2201                         }
2202                 }
2203
2204                 // Check for length errors again now that the section is merged in
2205                 $this->contentLength = strlen( $this->toEditText( $content ) );
2206                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2207                         $this->tooBig = true;
2208                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2209                         return $status;
2210                 }
2211
2212                 $flags = EDIT_AUTOSUMMARY |
2213                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2214                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2215                         ( $bot ? EDIT_FORCE_BOT : 0 );
2216
2217                 $doEditStatus = $this->page->doEditContent(
2218                         $content,
2219                         $this->summary,
2220                         $flags,
2221                         false,
2222                         $user,
2223                         $content->getDefaultFormat(),
2224                         $this->changeTags,
2225                         $this->undidRev
2226                 );
2227
2228                 if ( !$doEditStatus->isOK() ) {
2229                         // Failure from doEdit()
2230                         // Show the edit conflict page for certain recognized errors from doEdit(),
2231                         // but don't show it for errors from extension hooks
2232                         $errors = $doEditStatus->getErrorsArray();
2233                         if ( in_array( $errors[0][0],
2234                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2235                         ) {
2236                                 $this->isConflict = true;
2237                                 // Destroys data doEdit() put in $status->value but who cares
2238                                 $doEditStatus->value = self::AS_END;
2239                         }
2240                         return $doEditStatus;
2241                 }
2242
2243                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2244                 if ( $result['nullEdit'] ) {
2245                         // We don't know if it was a null edit until now, so increment here
2246                         $user->pingLimiter( 'linkpurge' );
2247                 }
2248                 $result['redirect'] = $content->isRedirect();
2249
2250                 $this->updateWatchlist();
2251
2252                 // If the content model changed, add a log entry
2253                 if ( $changingContentModel ) {
2254                         $this->addContentModelChangeLogEntry(
2255                                 $user,
2256                                 $new ? false : $oldContentModel,
2257                                 $this->contentModel,
2258                                 $this->summary
2259                         );
2260                 }
2261
2262                 return $status;
2263         }
2264
2265         /**
2266          * @param User $user
2267          * @param string|false $oldModel false if the page is being newly created
2268          * @param string $newModel
2269          * @param string $reason
2270          */
2271         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2272                 $new = $oldModel === false;
2273                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2274                 $log->setPerformer( $user );
2275                 $log->setTarget( $this->mTitle );
2276                 $log->setComment( $reason );
2277                 $log->setParameters( [
2278                         '4::oldmodel' => $oldModel,
2279                         '5::newmodel' => $newModel
2280                 ] );
2281                 $logid = $log->insert();
2282                 $log->publish( $logid );
2283         }
2284
2285         /**
2286          * Register the change of watch status
2287          */
2288         protected function updateWatchlist() {
2289                 $user = $this->context->getUser();
2290                 if ( !$user->isLoggedIn() ) {
2291                         return;
2292                 }
2293
2294                 $title = $this->mTitle;
2295                 $watch = $this->watchthis;
2296                 // Do this in its own transaction to reduce contention...
2297                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2298                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2299                                 return; // nothing to change
2300                         }
2301                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2302                 } );
2303         }
2304
2305         /**
2306          * Attempts to do 3-way merge of edit content with a base revision
2307          * and current content, in case of edit conflict, in whichever way appropriate
2308          * for the content type.
2309          *
2310          * @since 1.21
2311          *
2312          * @param Content $editContent
2313          *
2314          * @return bool
2315          */
2316         private function mergeChangesIntoContent( &$editContent ) {
2317                 $db = wfGetDB( DB_MASTER );
2318
2319                 // This is the revision the editor started from
2320                 $baseRevision = $this->getBaseRevision();
2321                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2322
2323                 if ( is_null( $baseContent ) ) {
2324                         return false;
2325                 }
2326
2327                 // The current state, we want to merge updates into it
2328                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2329                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2330
2331                 if ( is_null( $currentContent ) ) {
2332                         return false;
2333                 }
2334
2335                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2336
2337                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2338
2339                 if ( $result ) {
2340                         $editContent = $result;
2341                         // Update parentRevId to what we just merged.
2342                         $this->parentRevId = $currentRevision->getId();
2343                         return true;
2344                 }
2345
2346                 return false;
2347         }
2348
2349         /**
2350          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2351          *        one might think of X as the "base revision", which is NOT what this returns.
2352          * @return Revision Current version when the edit was started
2353          */
2354         public function getBaseRevision() {
2355                 if ( !$this->mBaseRevision ) {
2356                         $db = wfGetDB( DB_MASTER );
2357                         $this->mBaseRevision = $this->editRevId
2358                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2359                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2360                 }
2361                 return $this->mBaseRevision;
2362         }
2363
2364         /**
2365          * Check given input text against $wgSpamRegex, and return the text of the first match.
2366          *
2367          * @param string $text
2368          *
2369          * @return string|bool Matching string or false
2370          */
2371         public static function matchSpamRegex( $text ) {
2372                 global $wgSpamRegex;
2373                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2374                 $regexes = (array)$wgSpamRegex;
2375                 return self::matchSpamRegexInternal( $text, $regexes );
2376         }
2377
2378         /**
2379          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2380          *
2381          * @param string $text
2382          *
2383          * @return string|bool Matching string or false
2384          */
2385         public static function matchSummarySpamRegex( $text ) {
2386                 global $wgSummarySpamRegex;
2387                 $regexes = (array)$wgSummarySpamRegex;
2388                 return self::matchSpamRegexInternal( $text, $regexes );
2389         }
2390
2391         /**
2392          * @param string $text
2393          * @param array $regexes
2394          * @return bool|string
2395          */
2396         protected static function matchSpamRegexInternal( $text, $regexes ) {
2397                 foreach ( $regexes as $regex ) {
2398                         $matches = [];
2399                         if ( preg_match( $regex, $text, $matches ) ) {
2400                                 return $matches[0];
2401                         }
2402                 }
2403                 return false;
2404         }
2405
2406         public function setHeaders() {
2407                 $out = $this->context->getOutput();
2408
2409                 $out->addModules( 'mediawiki.action.edit' );
2410                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2411                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2412
2413                 $user = $this->context->getUser();
2414                 if ( $user->getOption( 'showtoolbar' ) ) {
2415                         // The addition of default buttons is handled by getEditToolbar() which
2416                         // has its own dependency on this module. The call here ensures the module
2417                         // is loaded in time (it has position "top") for other modules to register
2418                         // buttons (e.g. extensions, gadgets, user scripts).
2419                         $out->addModules( 'mediawiki.toolbar' );
2420                 }
2421
2422                 if ( $user->getOption( 'uselivepreview' ) ) {
2423                         $out->addModules( 'mediawiki.action.edit.preview' );
2424                 }
2425
2426                 if ( $user->getOption( 'useeditwarning' ) ) {
2427                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2428                 }
2429
2430                 # Enabled article-related sidebar, toplinks, etc.
2431                 $out->setArticleRelated( true );
2432
2433                 $contextTitle = $this->getContextTitle();
2434                 if ( $this->isConflict ) {
2435                         $msg = 'editconflict';
2436                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2437                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2438                 } else {
2439                         $msg = $contextTitle->exists()
2440                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2441                                         && $contextTitle->getDefaultMessageText() !== false
2442                                 )
2443                                 ? 'editing'
2444                                 : 'creating';
2445                 }
2446
2447                 # Use the title defined by DISPLAYTITLE magic word when present
2448                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2449                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2450                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2451                 if ( $displayTitle === false ) {
2452                         $displayTitle = $contextTitle->getPrefixedText();
2453                 }
2454                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2455                 # Transmit the name of the message to JavaScript for live preview
2456                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2457                 $out->addJsConfigVars( [
2458                         'wgEditMessage' => $msg,
2459                         'wgAjaxEditStash' => $this->context->getConfig()->get( 'AjaxEditStash' ),
2460                 ] );
2461         }
2462
2463         /**
2464          * Show all applicable editing introductions
2465          */
2466         protected function showIntro() {
2467                 if ( $this->suppressIntro ) {
2468                         return;
2469                 }
2470
2471                 $out = $this->context->getOutput();
2472                 $namespace = $this->mTitle->getNamespace();
2473
2474                 if ( $namespace == NS_MEDIAWIKI ) {
2475                         # Show a warning if editing an interface message
2476                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2477                         # If this is a default message (but not css or js),
2478                         # show a hint that it is translatable on translatewiki.net
2479                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2480                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2481                         ) {
2482                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2483                                 if ( $defaultMessageText !== false ) {
2484                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2485                                                 'translateinterface' );
2486                                 }
2487                         }
2488                 } elseif ( $namespace == NS_FILE ) {
2489                         # Show a hint to shared repo
2490                         $file = wfFindFile( $this->mTitle );
2491                         if ( $file && !$file->isLocal() ) {
2492                                 $descUrl = $file->getDescriptionUrl();
2493                                 # there must be a description url to show a hint to shared repo
2494                                 if ( $descUrl ) {
2495                                         if ( !$this->mTitle->exists() ) {
2496                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2497                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2498                                                 ] );
2499                                         } else {
2500                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2501                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2502                                                 ] );
2503                                         }
2504                                 }
2505                         }
2506                 }
2507
2508                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2509                 # Show log extract when the user is currently blocked
2510                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2511                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2512                         $user = User::newFromName( $username, false /* allow IP users */ );
2513                         $ip = User::isIP( $username );
2514                         $block = Block::newFromTarget( $user, $user );
2515                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2516                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2517                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2518                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2519                                 # Show log extract if the user is currently blocked
2520                                 LogEventsList::showLogExtract(
2521                                         $out,
2522                                         'block',
2523                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2524                                         '',
2525                                         [
2526                                                 'lim' => 1,
2527                                                 'showIfEmpty' => false,
2528                                                 'msgKey' => [
2529                                                         'blocked-notice-logextract',
2530                                                         $user->getName() # Support GENDER in notice
2531                                                 ]
2532                                         ]
2533                                 );
2534                         }
2535                 }
2536                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2537                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2538                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2539                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2540                         ) );
2541                         if ( $this->context->getUser()->isLoggedIn() ) {
2542                                 $out->wrapWikiMsg(
2543                                         // Suppress the external link icon, consider the help url an internal one
2544                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2545                                         [
2546                                                 'newarticletext',
2547                                                 $helpLink
2548                                         ]
2549                                 );
2550                         } else {
2551                                 $out->wrapWikiMsg(
2552                                         // Suppress the external link icon, consider the help url an internal one
2553                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2554                                         [
2555                                                 'newarticletextanon',
2556                                                 $helpLink
2557                                         ]
2558                                 );
2559                         }
2560                 }
2561                 # Give a notice if the user is editing a deleted/moved page...
2562                 if ( !$this->mTitle->exists() ) {
2563                         $dbr = wfGetDB( DB_REPLICA );
2564
2565                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2566                                 '',
2567                                 [
2568                                         'lim' => 10,
2569                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2570                                         'showIfEmpty' => false,
2571                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2572                                 ]
2573                         );
2574                 }
2575         }
2576
2577         /**
2578          * Attempt to show a custom editing introduction, if supplied
2579          *
2580          * @return bool
2581          */
2582         protected function showCustomIntro() {
2583                 if ( $this->editintro ) {
2584                         $title = Title::newFromText( $this->editintro );
2585                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2586                                 // Added using template syntax, to take <noinclude>'s into account.
2587                                 $this->context->getOutput()->addWikiTextTitleTidy(
2588                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2589                                         $this->mTitle
2590                                 );
2591                                 return true;
2592                         }
2593                 }
2594                 return false;
2595         }
2596
2597         /**
2598          * Gets an editable textual representation of $content.
2599          * The textual representation can be turned by into a Content object by the
2600          * toEditContent() method.
2601          *
2602          * If $content is null or false or a string, $content is returned unchanged.
2603          *
2604          * If the given Content object is not of a type that can be edited using
2605          * the text base EditPage, an exception will be raised. Set
2606          * $this->allowNonTextContent to true to allow editing of non-textual
2607          * content.
2608          *
2609          * @param Content|null|bool|string $content
2610          * @return string The editable text form of the content.
2611          *
2612          * @throws MWException If $content is not an instance of TextContent and
2613          *   $this->allowNonTextContent is not true.
2614          */
2615         protected function toEditText( $content ) {
2616                 if ( $content === null || $content === false || is_string( $content ) ) {
2617                         return $content;
2618                 }
2619
2620                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2621                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2622                 }
2623
2624                 return $content->serialize( $this->contentFormat );
2625         }
2626
2627         /**
2628          * Turns the given text into a Content object by unserializing it.
2629          *
2630          * If the resulting Content object is not of a type that can be edited using
2631          * the text base EditPage, an exception will be raised. Set
2632          * $this->allowNonTextContent to true to allow editing of non-textual
2633          * content.
2634          *
2635          * @param string|null|bool $text Text to unserialize
2636          * @return Content|bool|null The content object created from $text. If $text was false
2637          *   or null, false resp. null will be  returned instead.
2638          *
2639          * @throws MWException If unserializing the text results in a Content
2640          *   object that is not an instance of TextContent and
2641          *   $this->allowNonTextContent is not true.
2642          */
2643         protected function toEditContent( $text ) {
2644                 if ( $text === false || $text === null ) {
2645                         return $text;
2646                 }
2647
2648                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2649                         $this->contentModel, $this->contentFormat );
2650
2651                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2652                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2653                 }
2654
2655                 return $content;
2656         }
2657
2658         /**
2659          * Send the edit form and related headers to OutputPage
2660          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2661          *     during form output near the top, for captchas and the like.
2662          *
2663          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2664          * use the EditPage::showEditForm:fields hook instead.
2665          */
2666         public function showEditForm( $formCallback = null ) {
2667                 # need to parse the preview early so that we know which templates are used,
2668                 # otherwise users with "show preview after edit box" will get a blank list
2669                 # we parse this near the beginning so that setHeaders can do the title
2670                 # setting work instead of leaving it in getPreviewText
2671                 $previewOutput = '';
2672                 if ( $this->formtype == 'preview' ) {
2673                         $previewOutput = $this->getPreviewText();
2674                 }
2675
2676                 $out = $this->context->getOutput();
2677
2678                 // Avoid PHP 7.1 warning of passing $this by reference
2679                 $editPage = $this;
2680                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2681
2682                 $this->setHeaders();
2683
2684                 $this->addTalkPageText();
2685                 $this->addEditNotices();
2686
2687                 if ( !$this->isConflict &&
2688                         $this->section != '' &&
2689                         !$this->isSectionEditSupported() ) {
2690                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2691                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2692                         // Someone is welcome to try refactoring though
2693                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2694                         return;
2695                 }
2696
2697                 $this->showHeader();
2698
2699                 $out->addHTML( $this->editFormPageTop );
2700
2701                 $user = $this->context->getUser();
2702                 if ( $user->getOption( 'previewontop' ) ) {
2703                         $this->displayPreviewArea( $previewOutput, true );
2704                 }
2705
2706                 $out->addHTML( $this->editFormTextTop );
2707
2708                 $showToolbar = true;
2709                 if ( $this->wasDeletedSinceLastEdit() ) {
2710                         if ( $this->formtype == 'save' ) {
2711                                 // Hide the toolbar and edit area, user can click preview to get it back
2712                                 // Add an confirmation checkbox and explanation.
2713                                 $showToolbar = false;
2714                         } else {
2715                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2716                                         'deletedwhileediting' );
2717                         }
2718                 }
2719
2720                 // @todo add EditForm plugin interface and use it here!
2721                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2722                 $out->addHTML( Html::openElement(
2723                         'form',
2724                         [
2725                                 'class' => 'mw-editform',
2726                                 'id' => self::EDITFORM_ID,
2727                                 'name' => self::EDITFORM_ID,
2728                                 'method' => 'post',
2729                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2730                                 'enctype' => 'multipart/form-data'
2731                         ]
2732                 ) );
2733
2734                 if ( is_callable( $formCallback ) ) {
2735                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2736                         call_user_func_array( $formCallback, [ &$out ] );
2737                 }
2738
2739                 // Add a check for Unicode support
2740                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2741
2742                 // Add an empty field to trip up spambots
2743                 $out->addHTML(
2744                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2745                         . Html::rawElement(
2746                                 'label',
2747                                 [ 'for' => 'wpAntispam' ],
2748                                 $this->context->msg( 'simpleantispam-label' )->parse()
2749                         )
2750                         . Xml::element(
2751                                 'input',
2752                                 [
2753                                         'type' => 'text',
2754                                         'name' => 'wpAntispam',
2755                                         'id' => 'wpAntispam',
2756                                         'value' => ''
2757                                 ]
2758                         )
2759                         . Xml::closeElement( 'div' )
2760                 );
2761
2762                 // Avoid PHP 7.1 warning of passing $this by reference
2763                 $editPage = $this;
2764                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2765
2766                 // Put these up at the top to ensure they aren't lost on early form submission
2767                 $this->showFormBeforeText();
2768
2769                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2770                         $username = $this->lastDelete->user_name;
2771                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2772
2773                         // It is better to not parse the comment at all than to have templates expanded in the middle
2774                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2775                         $key = $comment === ''
2776                                 ? 'confirmrecreate-noreason'
2777                                 : 'confirmrecreate';
2778                         $out->addHTML(
2779                                 '<div class="mw-confirm-recreate">' .
2780                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2781                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2782                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2783                                 ) .
2784                                 '</div>'
2785                         );
2786                 }
2787
2788                 # When the summary is hidden, also hide them on preview/show changes
2789                 if ( $this->nosummary ) {
2790                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2791                 }
2792
2793                 # If a blank edit summary was previously provided, and the appropriate
2794                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2795                 # user being bounced back more than once in the event that a summary
2796                 # is not required.
2797                 # ####
2798                 # For a bit more sophisticated detection of blank summaries, hash the
2799                 # automatic one and pass that in the hidden field wpAutoSummary.
2800                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2801                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2802                 }
2803
2804                 if ( $this->undidRev ) {
2805                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2806                 }
2807
2808                 if ( $this->selfRedirect ) {
2809                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2810                 }
2811
2812                 if ( $this->hasPresetSummary ) {
2813                         // If a summary has been preset using &summary= we don't want to prompt for
2814                         // a different summary. Only prompt for a summary if the summary is blanked.
2815                         // (T19416)
2816                         $this->autoSumm = md5( '' );
2817                 }
2818
2819                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2820                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2821
2822                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2823                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2824
2825                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2826                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2827
2828                 $out->enableOOUI();
2829
2830                 if ( $this->section == 'new' ) {
2831                         $this->showSummaryInput( true, $this->summary );
2832                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2833                 }
2834
2835                 $out->addHTML( $this->editFormTextBeforeContent );
2836                 if ( $this->isConflict ) {
2837                         // In an edit conflict, we turn textbox2 into the user's text,
2838                         // and textbox1 into the stored version
2839                         $this->textbox2 = $this->textbox1;
2840
2841                         $content = $this->getCurrentContent();
2842                         $this->textbox1 = $this->toEditText( $content );
2843
2844                         $editConflictHelper = $this->getEditConflictHelper();
2845                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2846                         $editConflictHelper->setContentModel( $this->contentModel );
2847                         $editConflictHelper->setContentFormat( $this->contentFormat );
2848                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2849                 }
2850
2851                 if ( !$this->mTitle->isCssJsSubpage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2852                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2853                 }
2854
2855                 if ( $this->blankArticle ) {
2856                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2857                 }
2858
2859                 if ( $this->isConflict ) {
2860                         // In an edit conflict bypass the overridable content form method
2861                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2862                         // resolved between page source edits and custom ui edits using the
2863                         // custom edit ui.
2864                         $this->showTextbox1();
2865                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2866                 } else {
2867                         $this->showContentForm();
2868                 }
2869
2870                 $out->addHTML( $this->editFormTextAfterContent );
2871
2872                 $this->showStandardInputs();
2873
2874                 $this->showFormAfterText();
2875
2876                 $this->showTosSummary();
2877
2878                 $this->showEditTools();
2879
2880                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2881
2882                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2883
2884                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2885                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2886
2887                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2888                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2889
2890                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2891
2892                 if ( $this->isConflict ) {
2893                         try {
2894                                 $this->showConflict();
2895                         } catch ( MWContentSerializationException $ex ) {
2896                                 // this can't really happen, but be nice if it does.
2897                                 $msg = $this->context->msg(
2898                                         'content-failed-to-parse',
2899                                         $this->contentModel,
2900                                         $this->contentFormat,
2901                                         $ex->getMessage()
2902                                 );
2903                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2904                         }
2905                 }
2906
2907                 // Set a hidden field so JS knows what edit form mode we are in
2908                 if ( $this->isConflict ) {
2909                         $mode = 'conflict';
2910                 } elseif ( $this->preview ) {
2911                         $mode = 'preview';
2912                 } elseif ( $this->diff ) {
2913                         $mode = 'diff';
2914                 } else {
2915                         $mode = 'text';
2916                 }
2917                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2918
2919                 // Marker for detecting truncated form data.  This must be the last
2920                 // parameter sent in order to be of use, so do not move me.
2921                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2922                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2923
2924                 if ( !$user->getOption( 'previewontop' ) ) {
2925                         $this->displayPreviewArea( $previewOutput, false );
2926                 }
2927         }
2928
2929         /**
2930          * Wrapper around TemplatesOnThisPageFormatter to make
2931          * a "templates on this page" list.
2932          *
2933          * @param Title[] $templates
2934          * @return string HTML
2935          */
2936         public function makeTemplatesOnThisPageList( array $templates ) {
2937                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2938                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2939                 );
2940
2941                 // preview if preview, else section if section, else false
2942                 $type = false;
2943                 if ( $this->preview ) {
2944                         $type = 'preview';
2945                 } elseif ( $this->section != '' ) {
2946                         $type = 'section';
2947                 }
2948
2949                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2950                         $templateListFormatter->format( $templates, $type )
2951                 );
2952         }
2953
2954         /**
2955          * Extract the section title from current section text, if any.