includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Block\DatabaseBlock;
  24 use MediaWiki\EditPage\TextboxBuilder;
  25 use MediaWiki\EditPage\TextConflictHelper;
  26 use MediaWiki\Logger\LoggerFactory;
  27 use MediaWiki\MediaWikiServices;
  28 use Wikimedia\ScopedCallback;
  29
  30 /**
  31  * The edit page/HTML interface (split from Article)
  32  * The actual database and text munging is still in Article,
  33  * but it should get easier to call those from alternate
  34  * interfaces.
  35  *
  36  * EditPage cares about two distinct titles:
  37  * $this->mContextTitle is the page that forms submit to, links point to,
  38  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  39  * page in the database that is actually being edited. These are
  40  * usually the same, but they are now allowed to be different.
  41  *
  42  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  43  * headaches, which may be fatal.
  44  */
  45 class EditPage {
  46         /**
  47          * Used for Unicode support checks
  48          */
  49         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  50
  51         /**
  52          * Status: Article successfully updated
  53          */
  54         const AS_SUCCESS_UPDATE = 200;
  55
  56         /**
  57          * Status: Article successfully created
  58          */
  59         const AS_SUCCESS_NEW_ARTICLE = 201;
  60
  61         /**
  62          * Status: Article update aborted by a hook function
  63          */
  64         const AS_HOOK_ERROR = 210;
  65
  66         /**
  67          * Status: A hook function returned an error
  68          */
  69         const AS_HOOK_ERROR_EXPECTED = 212;
  70
  71         /**
  72          * Status: User is blocked from editing this page
  73          */
  74         const AS_BLOCKED_PAGE_FOR_USER = 215;
  75
  76         /**
  77          * Status: Content too big (> $wgMaxArticleSize)
  78          */
  79         const AS_CONTENT_TOO_BIG = 216;
  80
  81         /**
  82          * Status: this anonymous user is not allowed to edit this page
  83          */
  84         const AS_READ_ONLY_PAGE_ANON = 218;
  85
  86         /**
  87          * Status: this logged in user is not allowed to edit this page
  88          */
  89         const AS_READ_ONLY_PAGE_LOGGED = 219;
  90
  91         /**
  92          * Status: wiki is in readonly mode (wfReadOnly() == true)
  93          */
  94         const AS_READ_ONLY_PAGE = 220;
  95
  96         /**
  97          * Status: rate limiter for action 'edit' was tripped
  98          */
  99         const AS_RATE_LIMITED = 221;
 100
 101         /**
 102          * Status: article was deleted while editing and param wpRecreate == false or form
 103          * was not posted
 104          */
 105         const AS_ARTICLE_WAS_DELETED = 222;
 106
 107         /**
 108          * Status: user tried to create this page, but is not allowed to do that
 109          * ( Title->userCan('create') == false )
 110          */
 111         const AS_NO_CREATE_PERMISSION = 223;
 112
 113         /**
 114          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 115          */
 116         const AS_BLANK_ARTICLE = 224;
 117
 118         /**
 119          * Status: (non-resolvable) edit conflict
 120          */
 121         const AS_CONFLICT_DETECTED = 225;
 122
 123         /**
 124          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 125          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 126          */
 127         const AS_SUMMARY_NEEDED = 226;
 128
 129         /**
 130          * Status: user tried to create a new section without content
 131          */
 132         const AS_TEXTBOX_EMPTY = 228;
 133
 134         /**
 135          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 136          */
 137         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 138
 139         /**
 140          * Status: WikiPage::doEdit() was unsuccessful
 141          */
 142         const AS_END = 231;
 143
 144         /**
 145          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 146          */
 147         const AS_SPAM_ERROR = 232;
 148
 149         /**
 150          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 151          */
 152         const AS_IMAGE_REDIRECT_ANON = 233;
 153
 154         /**
 155          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 156          */
 157         const AS_IMAGE_REDIRECT_LOGGED = 234;
 158
 159         /**
 160          * Status: user tried to modify the content model, but is not allowed to do that
 161          * ( User::isAllowed('editcontentmodel') == false )
 162          */
 163         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 164
 165         /**
 166          * Status: user tried to create self-redirect (redirect to the same article) and
 167          * wpIgnoreSelfRedirect == false
 168          */
 169         const AS_SELF_REDIRECT = 236;
 170
 171         /**
 172          * Status: an error relating to change tagging. Look at the message key for
 173          * more details
 174          */
 175         const AS_CHANGE_TAG_ERROR = 237;
 176
 177         /**
 178          * Status: can't parse content
 179          */
 180         const AS_PARSE_ERROR = 240;
 181
 182         /**
 183          * Status: when changing the content model is disallowed due to
 184          * $wgContentHandlerUseDB being false
 185          */
 186         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 187
 188         /**
 189          * Status: edit rejected because browser doesn't support Unicode.
 190          */
 191         const AS_UNICODE_NOT_SUPPORTED = 242;
 192
 193         /**
 194          * HTML id and name for the beginning of the edit form.
 195          */
 196         const EDITFORM_ID = 'editform';
 197
 198         /**
 199          * Prefix of key for cookie used to pass post-edit state.
 200          * The revision id edited is added after this
 201          */
 202         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 203
 204         /**
 205          * Duration of PostEdit cookie, in seconds.
 206          * The cookie will be removed instantly if the JavaScript runs.
 207          *
 208          * Otherwise, though, we don't want the cookies to accumulate.
 209          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 210          * limit of only 20 cookies per domain. This still applies at least to some
 211          * versions of IE without full updates:
 212          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 213          *
 214          * A value of 20 minutes should be enough to take into account slow loads and minor
 215          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 216          */
 217         const POST_EDIT_COOKIE_DURATION = 1200;
 218
 219         /**
 220          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 221          * @var Article
 222          */
 223         public $mArticle;
 224         /** @var WikiPage */
 225         private $page;
 226
 227         /**
 228          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 229          * @var Title
 230          */
 231         public $mTitle;
 232
 233         /** @var null|Title */
 234         private $mContextTitle = null;
 235
 236         /** @var string */
 237         public $action = 'submit';
 238
 239         /** @var bool Whether an edit conflict needs to be resolved. Detected based on whether
 240          * $editRevId is different than the latest revision. When a conflict has successfully
 241          * been resolved by a 3-way-merge, this field is set to false.
 242          */
 243         public $isConflict = false;
 244
 245         /** @var bool New page or new section */
 246         public $isNew = false;
 247
 248         /** @var bool */
 249         public $deletedSinceEdit;
 250
 251         /** @var string */
 252         public $formtype;
 253
 254         /** @var bool
 255          * True the first time the edit form is rendered, false after re-rendering
 256          * with diff, save prompts, etc.
 257          */
 258         public $firsttime;
 259
 260         /** @var bool|stdClass */
 261         public $lastDelete;
 262
 263         /** @var bool */
 264         public $mTokenOk = false;
 265
 266         /** @var bool */
 267         public $mTokenOkExceptSuffix = false;
 268
 269         /** @var bool */
 270         public $mTriedSave = false;
 271
 272         /** @var bool */
 273         public $incompleteForm = false;
 274
 275         /** @var bool */
 276         public $tooBig = false;
 277
 278         /** @var bool */
 279         public $missingComment = false;
 280
 281         /** @var bool */
 282         public $missingSummary = false;
 283
 284         /** @var bool */
 285         public $allowBlankSummary = false;
 286
 287         /** @var bool */
 288         protected $blankArticle = false;
 289
 290         /** @var bool */
 291         protected $allowBlankArticle = false;
 292
 293         /** @var bool */
 294         protected $selfRedirect = false;
 295
 296         /** @var bool */
 297         protected $allowSelfRedirect = false;
 298
 299         /** @var string */
 300         public $autoSumm = '';
 301
 302         /** @var string */
 303         public $hookError = '';
 304
 305         /** @var ParserOutput */
 306         public $mParserOutput;
 307
 308         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 309         public $hasPresetSummary = false;
 310
 311         /** @var Revision|bool|null A revision object corresponding to $this->editRevId. */
 312         public $mBaseRevision = false;
 313
 314         /** @var bool */
 315         public $mShowSummaryField = true;
 316
 317         # Form values
 318
 319         /** @var bool */
 320         public $save = false;
 321
 322         /** @var bool */
 323         public $preview = false;
 324
 325         /** @var bool */
 326         public $diff = false;
 327
 328         /** @var bool */
 329         public $minoredit = false;
 330
 331         /** @var bool */
 332         public $watchthis = false;
 333
 334         /** @var bool */
 335         public $recreate = false;
 336
 337         /** @var string
 338          * Page content input field.
 339          */
 340         public $textbox1 = '';
 341
 342         /** @var string */
 343         public $textbox2 = '';
 344
 345         /** @var string */
 346         public $summary = '';
 347
 348         /** @var bool
 349          * If true, hide the summary field.
 350          */
 351         public $nosummary = false;
 352
 353         /** @var string
 354          * Timestamp of the latest revision of the page when editing was initiated
 355          * on the client.
 356          */
 357         public $edittime = '';
 358
 359         /** @var int Revision ID of the latest revision of the page when editing
 360          * was initiated on the client.  This is used to detect and resolve edit
 361          * conflicts.
 362          *
 363          * @note 0 if the page did not exist at that time.
 364          * @note When starting an edit from an old revision, this still records the current
 365          * revision at the time, not the one the edit is based on.
 366          *
 367          * @see $oldid
 368          * @see getBaseRevision()
 369          */
 370         private $editRevId = null;
 371
 372         /** @var string */
 373         public $section = '';
 374
 375         /** @var string */
 376         public $sectiontitle = '';
 377
 378         /** @var string
 379          * Timestamp from the first time the edit form was rendered.
 380          */
 381         public $starttime = '';
 382
 383         /** @var int Revision ID the edit is based on, or 0 if it's the current revision.
 384          * FIXME: This isn't used in conflict resolution--provide a better
 385          * justification or merge with parentRevId.
 386          * @see $editRevId
 387          */
 388         public $oldid = 0;
 389
 390         /** @var int Revision ID the edit is based on, adjusted when an edit conflict is resolved.
 391          * @see $editRevId
 392          * @see $oldid
 393          * @see getparentRevId()
 394          */
 395         public $parentRevId = 0;
 396
 397         /** @var string */
 398         public $editintro = '';
 399
 400         /** @var null */
 401         public $scrolltop = null;
 402
 403         /** @var bool */
 404         public $bot = true;
 405
 406         /** @var string */
 407         public $contentModel;
 408
 409         /** @var null|string */
 410         public $contentFormat = null;
 411
 412         /** @var null|array */
 413         private $changeTags = null;
 414
 415         # Placeholders for text injection by hooks (must be HTML)
 416         # extensions should take care to _append_ to the present value
 417
 418         /** @var string Before even the preview */
 419         public $editFormPageTop = '';
 420         public $editFormTextTop = '';
 421         public $editFormTextBeforeContent = '';
 422         public $editFormTextAfterWarn = '';
 423         public $editFormTextAfterTools = '';
 424         public $editFormTextBottom = '';
 425         public $editFormTextAfterContent = '';
 426         public $previewTextAfterContent = '';
 427         public $mPreloadContent = null;
 428
 429         /* $didSave should be set to true whenever an article was successfully altered. */
 430         public $didSave = false;
 431         public $undidRev = 0;
 432
 433         public $suppressIntro = false;
 434
 435         /** @var bool */
 436         protected $edit;
 437
 438         /** @var bool|int */
 439         protected $contentLength = false;
 440
 441         /**
 442          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 443          */
 444         private $enableApiEditOverride = false;
 445
 446         /**
 447          * @var IContextSource
 448          */
 449         protected $context;
 450
 451         /**
 452          * @var bool Whether an old revision is edited
 453          */
 454         private $isOldRev = false;
 455
 456         /**
 457          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 458          */
 459         private $unicodeCheck;
 460
 461         /**
 462          * Factory function to create an edit conflict helper
 463          *
 464          * @var callable
 465          */
 466         private $editConflictHelperFactory;
 467
 468         /**
 469          * @var TextConflictHelper|null
 470          */
 471         private $editConflictHelper;
 472
 473         /**
 474          * @param Article $article
 475          */
 476         public function __construct( Article $article ) {
 477                 $this->mArticle = $article;
 478                 $this->page = $article->getPage(); // model object
 479                 $this->mTitle = $article->getTitle();
 480
 481                 // Make sure the local context is in sync with other member variables.
 482                 // Particularly make sure everything is using the same WikiPage instance.
 483                 // This should probably be the case in Article as well, but it's
 484                 // particularly important for EditPage, to make use of the in-place caching
 485                 // facility in WikiPage::prepareContentForEdit.
 486                 $this->context = new DerivativeContext( $article->getContext() );
 487                 $this->context->setWikiPage( $this->page );
 488                 $this->context->setTitle( $this->mTitle );
 489
 490                 $this->contentModel = $this->mTitle->getContentModel();
 491
 492                 $handler = ContentHandler::getForModelID( $this->contentModel );
 493                 $this->contentFormat = $handler->getDefaultFormat();
 494                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 495         }
 496
 497         /**
 498          * @return Article
 499          */
 500         public function getArticle() {
 501                 return $this->mArticle;
 502         }
 503
 504         /**
 505          * @since 1.28
 506          * @return IContextSource
 507          */
 508         public function getContext() {
 509                 return $this->context;
 510         }
 511
 512         /**
 513          * @since 1.19
 514          * @return Title
 515          */
 516         public function getTitle() {
 517                 return $this->mTitle;
 518         }
 519
 520         /**
 521          * Set the context Title object
 522          *
 523          * @param Title|null $title Title object or null
 524          */
 525         public function setContextTitle( $title ) {
 526                 $this->mContextTitle = $title;
 527         }
 528
 529         /**
 530          * Get the context title object.
 531          *
 532          * If not set, $wgTitle will be returned, but this is deprecated. This will
 533          * throw an exception.
 534          *
 535          * @return Title
 536          */
 537         public function getContextTitle() {
 538                 if ( is_null( $this->mContextTitle ) ) {
 539                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 540                         global $wgTitle;
 541                         return $wgTitle;
 542                 } else {
 543                         return $this->mContextTitle;
 544                 }
 545         }
 546
 547         /**
 548          * Returns if the given content model is editable.
 549          *
 550          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 551          * @return bool
 552          * @throws MWException If $modelId has no known handler
 553          */
 554         public function isSupportedContentModel( $modelId ) {
 555                 return $this->enableApiEditOverride === true ||
 556                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 557         }
 558
 559         /**
 560          * Allow editing of content that supports API direct editing, but not general
 561          * direct editing. Set to false by default.
 562          *
 563          * @param bool $enableOverride
 564          */
 565         public function setApiEditOverride( $enableOverride ) {
 566                 $this->enableApiEditOverride = $enableOverride;
 567         }
 568
 569         /**
 570          * @deprecated since 1.29, call edit directly
 571          */
 572         public function submit() {
 573                 wfDeprecated( __METHOD__, '1.29' );
 574                 $this->edit();
 575         }
 576
 577         /**
 578          * This is the function that gets called for "action=edit". It
 579          * sets up various member variables, then passes execution to
 580          * another function, usually showEditForm()
 581          *
 582          * The edit form is self-submitting, so that when things like
 583          * preview and edit conflicts occur, we get the same form back
 584          * with the extra stuff added.  Only when the final submission
 585          * is made and all is well do we actually save and redirect to
 586          * the newly-edited page.
 587          */
 588         public function edit() {
 589                 // Allow extensions to modify/prevent this form or submission
 590                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 591                         return;
 592                 }
 593
 594                 wfDebug( __METHOD__ . ": enter\n" );
 595
 596                 $request = $this->context->getRequest();
 597                 // If they used redlink=1 and the page exists, redirect to the main article
 598                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 599                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 600                         return;
 601                 }
 602
 603                 $this->importFormData( $request );
 604                 $this->firsttime = false;
 605
 606                 if ( wfReadOnly() && $this->save ) {
 607                         // Force preview
 608                         $this->save = false;
 609                         $this->preview = true;
 610                 }
 611
 612                 if ( $this->save ) {
 613                         $this->formtype = 'save';
 614                 } elseif ( $this->preview ) {
 615                         $this->formtype = 'preview';
 616                 } elseif ( $this->diff ) {
 617                         $this->formtype = 'diff';
 618                 } else { # First time through
 619                         $this->firsttime = true;
 620                         if ( $this->previewOnOpen() ) {
 621                                 $this->formtype = 'preview';
 622                         } else {
 623                                 $this->formtype = 'initial';
 624                         }
 625                 }
 626
 627                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 628                 if ( $permErrors ) {
 629                         wfDebug( __METHOD__ . ": User can't edit\n" );
 630
 631                         if ( $this->context->getUser()->getBlock() ) {
 632                                 // track block with a cookie if it doesn't exists already
 633                                 $this->context->getUser()->trackBlockWithCookie();
 634
 635                                 // Auto-block user's IP if the account was "hard" blocked
 636                                 if ( !wfReadOnly() ) {
 637                                         DeferredUpdates::addCallableUpdate( function () {
 638                                                 $this->context->getUser()->spreadAnyEditBlock();
 639                                         } );
 640                                 }
 641                         }
 642                         $this->displayPermissionsError( $permErrors );
 643
 644                         return;
 645                 }
 646
 647                 $revision = $this->mArticle->getRevisionFetched();
 648                 // Disallow editing revisions with content models different from the current one
 649                 // Undo edits being an exception in order to allow reverting content model changes.
 650                 if ( $revision
 651                         && $revision->getContentModel() !== $this->contentModel
 652                 ) {
 653                         $prevRev = null;
 654                         if ( $this->undidRev ) {
 655                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 656                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 657                         }
 658                         if ( !$this->undidRev
 659                                 || !$prevRev
 660                                 || $prevRev->getContentModel() !== $this->contentModel
 661                         ) {
 662                                 $this->displayViewSourcePage(
 663                                         $this->getContentObject(),
 664                                         $this->context->msg(
 665                                                 'contentmodelediterror',
 666                                                 $revision->getContentModel(),
 667                                                 $this->contentModel
 668                                         )->plain()
 669                                 );
 670                                 return;
 671                         }
 672                 }
 673
 674                 $this->isConflict = false;
 675
 676                 # Show applicable editing introductions
 677                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 678                         $this->showIntro();
 679                 }
 680
 681                 # Attempt submission here.  This will check for edit conflicts,
 682                 # and redundantly check for locked database, blocked IPs, etc.
 683                 # that edit() already checked just in case someone tries to sneak
 684                 # in the back door with a hand-edited submission URL.
 685
 686                 if ( $this->formtype == 'save' ) {
 687                         $resultDetails = null;
 688                         $status = $this->attemptSave( $resultDetails );
 689                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 690                                 return;
 691                         }
 692                 }
 693
 694                 # First time through: get contents, set time for conflict
 695                 # checking, etc.
 696                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 697                         if ( $this->initialiseForm() === false ) {
 698                                 $out = $this->context->getOutput();
 699                                 if ( $out->getRedirect() === '' ) { // mcrundo hack redirects, don't override it
 700                                         $this->noSuchSectionPage();
 701                                 }
 702                                 return;
 703                         }
 704
 705                         if ( !$this->mTitle->getArticleID() ) {
 706                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 707                         } else {
 708                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 709                         }
 710
 711                 }
 712
 713                 $this->showEditForm();
 714         }
 715
 716         /**
 717          * @param string $rigor Same format as Title::getUserPermissionErrors()
 718          * @return array
 719          */
 720         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 721                 $user = $this->context->getUser();
 722                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 723                 # Can this title be created?
 724                 if ( !$this->mTitle->exists() ) {
 725                         $permErrors = array_merge(
 726                                 $permErrors,
 727                                 wfArrayDiff2(
 728                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 729                                         $permErrors
 730                                 )
 731                         );
 732                 }
 733                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 734                 $remove = [];
 735                 foreach ( $permErrors as $error ) {
 736                         if ( ( $this->preview || $this->diff )
 737                                 && (
 738                                         $error[0] == 'blockedtext' ||
 739                                         $error[0] == 'autoblockedtext' ||
 740                                         $error[0] == 'systemblockedtext'
 741                                 )
 742                         ) {
 743                                 $remove[] = $error;
 744                         }
 745                 }
 746                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 747
 748                 return $permErrors;
 749         }
 750
 751         /**
 752          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 753          * but with the following differences:
 754          * - If redlink=1, the user will be redirected to the page
 755          * - If there is content to display or the error occurs while either saving,
 756          *   previewing or showing the difference, it will be a
 757          *   "View source for ..." page displaying the source code after the error message.
 758          *
 759          * @since 1.19
 760          * @param array $permErrors Array of permissions errors, as returned by
 761          *    Title::getUserPermissionsErrors().
 762          * @throws PermissionsError
 763          */
 764         protected function displayPermissionsError( array $permErrors ) {
 765                 $out = $this->context->getOutput();
 766                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 767                         // The edit page was reached via a red link.
 768                         // Redirect to the article page and let them click the edit tab if
 769                         // they really want a permission error.
 770                         $out->redirect( $this->mTitle->getFullURL() );
 771                         return;
 772                 }
 773
 774                 $content = $this->getContentObject();
 775
 776                 # Use the normal message if there's nothing to display
 777                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 778                         $action = $this->mTitle->exists() ? 'edit' :
 779                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 780                         throw new PermissionsError( $action, $permErrors );
 781                 }
 782
 783                 $this->displayViewSourcePage(
 784                         $content,
 785                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 786                 );
 787         }
 788
 789         /**
 790          * Display a read-only View Source page
 791          * @param Content $content
 792          * @param string $errorMessage additional wikitext error message to display
 793          */
 794         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 795                 $out = $this->context->getOutput();
 796                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 797
 798                 $out->setRobotPolicy( 'noindex,nofollow' );
 799                 $out->setPageTitle( $this->context->msg(
 800                         'viewsource-title',
 801                         $this->getContextTitle()->getPrefixedText()
 802                 ) );
 803                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 804                 $out->addHTML( $this->editFormPageTop );
 805                 $out->addHTML( $this->editFormTextTop );
 806
 807                 if ( $errorMessage !== '' ) {
 808                         $out->addWikiTextAsInterface( $errorMessage );
 809                         $out->addHTML( "<hr />\n" );
 810                 }
 811
 812                 # If the user made changes, preserve them when showing the markup
 813                 # (This happens when a user is blocked during edit, for instance)
 814                 if ( !$this->firsttime ) {
 815                         $text = $this->textbox1;
 816                         $out->addWikiMsg( 'viewyourtext' );
 817                 } else {
 818                         try {
 819                                 $text = $this->toEditText( $content );
 820                         } catch ( MWException $e ) {
 821                                 # Serialize using the default format if the content model is not supported
 822                                 # (e.g. for an old revision with a different model)
 823                                 $text = $content->serialize();
 824                         }
 825                         $out->addWikiMsg( 'viewsourcetext' );
 826                 }
 827
 828                 $out->addHTML( $this->editFormTextBeforeContent );
 829                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 830                 $out->addHTML( $this->editFormTextAfterContent );
 831
 832                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 833
 834                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 835
 836                 $out->addHTML( $this->editFormTextBottom );
 837                 if ( $this->mTitle->exists() ) {
 838                         $out->returnToMain( null, $this->mTitle );
 839                 }
 840         }
 841
 842         /**
 843          * Should we show a preview when the edit form is first shown?
 844          *
 845          * @return bool
 846          */
 847         protected function previewOnOpen() {
 848                 $config = $this->context->getConfig();
 849                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 850                 $request = $this->context->getRequest();
 851                 if ( $config->get( 'RawHtml' ) ) {
 852                         // If raw HTML is enabled, disable preview on open
 853                         // since it has to be posted with a token for
 854                         // security reasons
 855                         return false;
 856                 }
 857                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 858                         // Explicit override from request
 859                         return true;
 860                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 861                         // Explicit override from request
 862                         return false;
 863                 } elseif ( $this->section == 'new' ) {
 864                         // Nothing *to* preview for new sections
 865                         return false;
 866                 } elseif ( ( $request->getCheck( 'preload' ) || $this->mTitle->exists() )
 867                         && $this->context->getUser()->getOption( 'previewonfirst' )
 868                 ) {
 869                         // Standard preference behavior
 870                         return true;
 871                 } elseif ( !$this->mTitle->exists()
 872                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 873                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 874                 ) {
 875                         // Categories are special
 876                         return true;
 877                 } else {
 878                         return false;
 879                 }
 880         }
 881
 882         /**
 883          * Checks whether the user entered a skin name in uppercase,
 884          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 885          *
 886          * @return bool
 887          */
 888         protected function isWrongCaseUserConfigPage() {
 889                 if ( $this->mTitle->isUserConfigPage() ) {
 890                         $name = $this->mTitle->getSkinFromConfigSubpage();
 891                         $skins = array_merge(
 892                                 array_keys( Skin::getSkinNames() ),
 893                                 [ 'common' ]
 894                         );
 895                         return !in_array( $name, $skins )
 896                                 && in_array( strtolower( $name ), $skins );
 897                 } else {
 898                         return false;
 899                 }
 900         }
 901
 902         /**
 903          * Returns whether section editing is supported for the current page.
 904          * Subclasses may override this to replace the default behavior, which is
 905          * to check ContentHandler::supportsSections.
 906          *
 907          * @return bool True if this edit page supports sections, false otherwise.
 908          */
 909         protected function isSectionEditSupported() {
 910                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 911                 return $contentHandler->supportsSections();
 912         }
 913
 914         /**
 915          * This function collects the form data and uses it to populate various member variables.
 916          * @param WebRequest &$request
 917          * @throws ErrorPageError
 918          */
 919         public function importFormData( &$request ) {
 920                 # Section edit can come from either the form or a link
 921                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 922
 923                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 924                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 925                 }
 926
 927                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 928
 929                 if ( $request->wasPosted() ) {
 930                         # These fields need to be checked for encoding.
 931                         # Also remove trailing whitespace, but don't remove _initial_
 932                         # whitespace from the text boxes. This may be significant formatting.
 933                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 934                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 935                                 // Skip this if wpTextbox2 has input, it indicates that we came
 936                                 // from a conflict page with raw page text, not a custom form
 937                                 // modified by subclasses
 938                                 $textbox1 = $this->importContentFormData( $request );
 939                                 if ( $textbox1 !== null ) {
 940                                         $this->textbox1 = $textbox1;
 941                                 }
 942                         }
 943
 944                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 945
 946                         $this->summary = $request->getText( 'wpSummary' );
 947
 948                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 949                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 950                         # section titles.
 951                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 952
 953                         # Treat sectiontitle the same way as summary.
 954                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 955                         # currently doing double duty as both edit summary and section title. Right now this
 956                         # is just to allow API edits to work around this limitation, but this should be
 957                         # incorporated into the actual edit form when EditPage is rewritten (T20654, T28312).
 958                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 959                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 960
 961                         $this->edittime = $request->getVal( 'wpEdittime' );
 962                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 963                         $this->starttime = $request->getVal( 'wpStarttime' );
 964
 965                         $undidRev = $request->getInt( 'wpUndidRevision' );
 966                         if ( $undidRev ) {
 967                                 $this->undidRev = $undidRev;
 968                         }
 969
 970                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 971
 972                         if ( $this->textbox1 === '' && !$request->getCheck( 'wpTextbox1' ) ) {
 973                                 // wpTextbox1 field is missing, possibly due to being "too big"
 974                                 // according to some filter rules such as Suhosin's setting for
 975                                 // suhosin.request.max_value_length (d'oh)
 976                                 $this->incompleteForm = true;
 977                         } else {
 978                                 // If we receive the last parameter of the request, we can fairly
 979                                 // claim the POST request has not been truncated.
 980                                 $this->incompleteForm = !$request->getVal( 'wpUltimateParam' );
 981                         }
 982                         if ( $this->incompleteForm ) {
 983                                 # If the form is incomplete, force to preview.
 984                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 985                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 986                                 $this->preview = true;
 987                         } else {
 988                                 $this->preview = $request->getCheck( 'wpPreview' );
 989                                 $this->diff = $request->getCheck( 'wpDiff' );
 990
 991                                 // Remember whether a save was requested, so we can indicate
 992                                 // if we forced preview due to session failure.
 993                                 $this->mTriedSave = !$this->preview;
 994
 995                                 if ( $this->tokenOk( $request ) ) {
 996                                         # Some browsers will not report any submit button
 997                                         # if the user hits enter in the comment box.
 998                                         # The unmarked state will be assumed to be a save,
 999                                         # if the form seems otherwise complete.
1000                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
1001                                 } elseif ( $this->diff ) {
1002                                         # Failed token check, but only requested "Show Changes".
1003                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
1004                                 } else {
1005                                         # Page might be a hack attempt posted from
1006                                         # an external site. Preview instead of saving.
1007                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
1008                                         $this->preview = true;
1009                                 }
1010                         }
1011                         $this->save = !$this->preview && !$this->diff;
1012                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1013                                 $this->edittime = null;
1014                         }
1015
1016                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1017                                 $this->starttime = null;
1018                         }
1019
1020                         $this->recreate = $request->getCheck( 'wpRecreate' );
1021
1022                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1023                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1024
1025                         $user = $this->context->getUser();
1026                         # Don't force edit summaries when a user is editing their own user or talk page
1027                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1028                                 && $this->mTitle->getText() == $user->getName()
1029                         ) {
1030                                 $this->allowBlankSummary = true;
1031                         } else {
1032                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1033                                         || !$user->getOption( 'forceeditsummary' );
1034                         }
1035
1036                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1037
1038                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1039                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1040
1041                         $changeTags = $request->getVal( 'wpChangeTags' );
1042                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1043                                 $this->changeTags = [];
1044                         } else {
1045                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1046                                         $changeTags ) ) );
1047                         }
1048                 } else {
1049                         # Not a posted form? Start with nothing.
1050                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1051                         $this->textbox1 = '';
1052                         $this->summary = '';
1053                         $this->sectiontitle = '';
1054                         $this->edittime = '';
1055                         $this->editRevId = null;
1056                         $this->starttime = wfTimestampNow();
1057                         $this->edit = false;
1058                         $this->preview = false;
1059                         $this->save = false;
1060                         $this->diff = false;
1061                         $this->minoredit = false;
1062                         // Watch may be overridden by request parameters
1063                         $this->watchthis = $request->getBool( 'watchthis', false );
1064                         $this->recreate = false;
1065
1066                         // When creating a new section, we can preload a section title by passing it as the
1067                         // preloadtitle parameter in the URL (T15100)
1068                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1069                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1070                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1071                                 $this->summary = $request->getVal( 'preloadtitle' );
1072                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) !== '' ) {
1073                                 $this->summary = $request->getText( 'summary' );
1074                                 if ( $this->summary !== '' ) {
1075                                         $this->hasPresetSummary = true;
1076                                 }
1077                         }
1078
1079                         if ( $request->getVal( 'minor' ) ) {
1080                                 $this->minoredit = true;
1081                         }
1082                 }
1083
1084                 $this->oldid = $request->getInt( 'oldid' );
1085                 $this->parentRevId = $request->getInt( 'parentRevId' );
1086
1087                 $this->bot = $request->getBool( 'bot', true );
1088                 $this->nosummary = $request->getBool( 'nosummary' );
1089
1090                 // May be overridden by revision.
1091                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1092                 // May be overridden by revision.
1093                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1094
1095                 try {
1096                         $handler = ContentHandler::getForModelID( $this->contentModel );
1097                 } catch ( MWUnknownContentModelException $e ) {
1098                         throw new ErrorPageError(
1099                                 'editpage-invalidcontentmodel-title',
1100                                 'editpage-invalidcontentmodel-text',
1101                                 [ wfEscapeWikiText( $this->contentModel ) ]
1102                         );
1103                 }
1104
1105                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1106                         throw new ErrorPageError(
1107                                 'editpage-notsupportedcontentformat-title',
1108                                 'editpage-notsupportedcontentformat-text',
1109                                 [
1110                                         wfEscapeWikiText( $this->contentFormat ),
1111                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1112                                 ]
1113                         );
1114                 }
1115
1116                 /**
1117                  * @todo Check if the desired model is allowed in this namespace, and if
1118                  *   a transition from the page's current model to the new model is
1119                  *   allowed.
1120                  */
1121
1122                 $this->editintro = $request->getText( 'editintro',
1123                         // Custom edit intro for new sections
1124                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1125
1126                 // Allow extensions to modify form data
1127                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1128         }
1129
1130         /**
1131          * Subpage overridable method for extracting the page content data from the
1132          * posted form to be placed in $this->textbox1, if using customized input
1133          * this method should be overridden and return the page text that will be used
1134          * for saving, preview parsing and so on...
1135          *
1136          * @param WebRequest &$request
1137          * @return string|null
1138          */
1139         protected function importContentFormData( &$request ) {
1140                 return; // Don't do anything, EditPage already extracted wpTextbox1
1141         }
1142
1143         /**
1144          * Initialise form fields in the object
1145          * Called on the first invocation, e.g. when a user clicks an edit link
1146          * @return bool If the requested section is valid
1147          */
1148         public function initialiseForm() {
1149                 $this->edittime = $this->page->getTimestamp();
1150                 $this->editRevId = $this->page->getLatest();
1151
1152                 $content = $this->getContentObject( false ); # TODO: track content object?!
1153                 if ( $content === false ) {
1154                         return false;
1155                 }
1156                 $this->textbox1 = $this->toEditText( $content );
1157
1158                 $user = $this->context->getUser();
1159                 // activate checkboxes if user wants them to be always active
1160                 # Sort out the "watch" checkbox
1161                 if ( $user->getOption( 'watchdefault' ) ) {
1162                         # Watch all edits
1163                         $this->watchthis = true;
1164                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1165                         # Watch creations
1166                         $this->watchthis = true;
1167                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1168                         # Already watched
1169                         $this->watchthis = true;
1170                 }
1171                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1172                         $this->minoredit = true;
1173                 }
1174                 if ( $this->textbox1 === false ) {
1175                         return false;
1176                 }
1177                 return true;
1178         }
1179
1180         /**
1181          * @param Content|null $def_content The default value to return
1182          *
1183          * @return Content|null Content on success, $def_content for invalid sections
1184          *
1185          * @since 1.21
1186          */
1187         protected function getContentObject( $def_content = null ) {
1188                 $content = false;
1189
1190                 $user = $this->context->getUser();
1191                 $request = $this->context->getRequest();
1192                 // For message page not locally set, use the i18n message.
1193                 // For other non-existent articles, use preload text if any.
1194                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1195                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1196                                 # If this is a system message, get the default text.
1197                                 $msg = $this->mTitle->getDefaultMessageText();
1198
1199                                 $content = $this->toEditContent( $msg );
1200                         }
1201                         if ( $content === false ) {
1202                                 # If requested, preload some text.
1203                                 $preload = $request->getVal( 'preload',
1204                                         // Custom preload text for new sections
1205                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1206                                 $params = $request->getArray( 'preloadparams', [] );
1207
1208                                 $content = $this->getPreloadedContent( $preload, $params );
1209                         }
1210                 // For existing pages, get text based on "undo" or section parameters.
1211                 } elseif ( $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                                 $undoMsg = null;
1227
1228                                 # Sanity check, make sure it's the right page,
1229                                 # the revisions exist and they were not deleted.
1230                                 # Otherwise, $content will be left as-is.
1231                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1232                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1233                                         !$oldrev->isDeleted( Revision::DELETED_TEXT )
1234                                 ) {
1235                                         if ( WikiPage::hasDifferencesOutsideMainSlot( $undorev, $oldrev )
1236                                                 || !$this->isSupportedContentModel( $oldrev->getContentModel() )
1237                                         ) {
1238                                                 // Hack for undo while EditPage can't handle multi-slot editing
1239                                                 $this->context->getOutput()->redirect( $this->mTitle->getFullURL( [
1240                                                         'action' => 'mcrundo',
1241                                                         'undo' => $undo,
1242                                                         'undoafter' => $undoafter,
1243                                                 ] ) );
1244                                                 return false;
1245                                         } else {
1246                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1247
1248                                                 if ( $content === false ) {
1249                                                         # Warn the user that something went wrong
1250                                                         $undoMsg = 'failure';
1251                                                 }
1252                                         }
1253
1254                                         if ( $undoMsg === null ) {
1255                                                 $oldContent = $this->page->getContent( Revision::RAW );
1256                                                 $popts = ParserOptions::newFromUserAndLang(
1257                                                         $user, MediaWikiServices::getInstance()->getContentLanguage() );
1258                                                 $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1259                                                 if ( $newContent->getModel() !== $oldContent->getModel() ) {
1260                                                         // The undo may change content
1261                                                         // model if its reverting the top
1262                                                         // edit. This can result in
1263                                                         // mismatched content model/format.
1264                                                         $this->contentModel = $newContent->getModel();
1265                                                         $this->contentFormat = $oldrev->getContentFormat();
1266                                                 }
1267
1268                                                 if ( $newContent->equals( $oldContent ) ) {
1269                                                         # Tell the user that the undo results in no change,
1270                                                         # i.e. the revisions were already undone.
1271                                                         $undoMsg = 'nochange';
1272                                                         $content = false;
1273                                                 } else {
1274                                                         # Inform the user of our success and set an automatic edit summary
1275                                                         $undoMsg = 'success';
1276
1277                                                         # If we just undid one rev, use an autosummary
1278                                                         $firstrev = $oldrev->getNext();
1279                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
1280                                                                 $userText = $undorev->getUserText();
1281                                                                 if ( $userText === '' ) {
1282                                                                         $undoSummary = $this->context->msg(
1283                                                                                 'undo-summary-username-hidden',
1284                                                                                 $undo
1285                                                                         )->inContentLanguage()->text();
1286                                                                 } else {
1287                                                                         $undoSummary = $this->context->msg(
1288                                                                                 'undo-summary',
1289                                                                                 $undo,
1290                                                                                 $userText
1291                                                                         )->inContentLanguage()->text();
1292                                                                 }
1293                                                                 if ( $this->summary === '' ) {
1294                                                                         $this->summary = $undoSummary;
1295                                                                 } else {
1296                                                                         $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1297                                                                                 ->inContentLanguage()->text() . $this->summary;
1298                                                                 }
1299                                                                 $this->undidRev = $undo;
1300                                                         }
1301                                                         $this->formtype = 'diff';
1302                                                 }
1303                                         }
1304                                 } else {
1305                                         // Failed basic sanity checks.
1306                                         // Older revisions may have been removed since the link
1307                                         // was created, or we may simply have got bogus input.
1308                                         $undoMsg = 'norev';
1309                                 }
1310
1311                                 $out = $this->context->getOutput();
1312                                 // Messages: undo-success, undo-failure, undo-main-slot-only, undo-norev,
1313                                 // undo-nochange.
1314                                 $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1315                                 $this->editFormPageTop .= Html::rawElement(
1316                                         'div', [ 'class' => $class ],
1317                                         $out->parseAsInterface(
1318                                                 $this->context->msg( 'undo-' . $undoMsg )->plain()
1319                                         )
1320                                 );
1321                         }
1322
1323                         if ( $content === false ) {
1324                                 // Hack for restoring old revisions while EditPage
1325                                 // can't handle multi-slot editing.
1326
1327                                 $curRevision = $this->page->getRevision();
1328                                 $oldRevision = $this->mArticle->getRevisionFetched();
1329
1330                                 if ( $curRevision
1331                                         && $oldRevision
1332                                         && $curRevision->getId() !== $oldRevision->getId()
1333                                         && ( WikiPage::hasDifferencesOutsideMainSlot( $oldRevision, $curRevision )
1334                                                 || !$this->isSupportedContentModel( $oldRevision->getContentModel() ) )
1335                                 ) {
1336                                         $this->context->getOutput()->redirect(
1337                                                 $this->mTitle->getFullURL(
1338                                                         [
1339                                                                 'action' => 'mcrrestore',
1340                                                                 'restore' => $oldRevision->getId(),
1341                                                         ]
1342                                                 )
1343                                         );
1344
1345                                         return false;
1346                                 }
1347                         }
1348
1349                         if ( $content === false ) {
1350                                 $content = $this->getOriginalContent( $user );
1351                         }
1352                 }
1353
1354                 return $content;
1355         }
1356
1357         /**
1358          * Get the content of the wanted revision, without section extraction.
1359          *
1360          * The result of this function can be used to compare user's input with
1361          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1362          * to the original text of the edit.
1363          *
1364          * This differs from Article::getContent() that when a missing revision is
1365          * encountered the result will be null and not the
1366          * 'missing-revision' message.
1367          *
1368          * @since 1.19
1369          * @param User $user The user to get the revision for
1370          * @return Content|null
1371          */
1372         private function getOriginalContent( User $user ) {
1373                 if ( $this->section == 'new' ) {
1374                         return $this->getCurrentContent();
1375                 }
1376                 $revision = $this->mArticle->getRevisionFetched();
1377                 if ( $revision === null ) {
1378                         $handler = ContentHandler::getForModelID( $this->contentModel );
1379                         return $handler->makeEmptyContent();
1380                 }
1381                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1382                 return $content;
1383         }
1384
1385         /**
1386          * Get the edit's parent revision ID
1387          *
1388          * The "parent" revision is the ancestor that should be recorded in this
1389          * page's revision history.  It is either the revision ID of the in-memory
1390          * article content, or in the case of a 3-way merge in order to rebase
1391          * across a recoverable edit conflict, the ID of the newer revision to
1392          * which we have rebased this page.
1393          *
1394          * @since 1.27
1395          * @return int Revision ID
1396          */
1397         public function getParentRevId() {
1398                 if ( $this->parentRevId ) {
1399                         return $this->parentRevId;
1400                 } else {
1401                         return $this->mArticle->getRevIdFetched();
1402                 }
1403         }
1404
1405         /**
1406          * Get the current content of the page. This is basically similar to
1407          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1408          * content object is returned instead of null.
1409          *
1410          * @since 1.21
1411          * @return Content
1412          */
1413         protected function getCurrentContent() {
1414                 $rev = $this->page->getRevision();
1415                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1416
1417                 if ( $content === false || $content === null ) {
1418                         $handler = ContentHandler::getForModelID( $this->contentModel );
1419                         return $handler->makeEmptyContent();
1420                 } elseif ( !$this->undidRev ) {
1421                         // Content models should always be the same since we error
1422                         // out if they are different before this point (in ->edit()).
1423                         // The exception being, during an undo, the current revision might
1424                         // differ from the prior revision.
1425                         $logger = LoggerFactory::getInstance( 'editpage' );
1426                         if ( $this->contentModel !== $rev->getContentModel() ) {
1427                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1428                                         'prev' => $this->contentModel,
1429                                         'new' => $rev->getContentModel(),
1430                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1431                                         'method' => __METHOD__
1432                                 ] );
1433                                 $this->contentModel = $rev->getContentModel();
1434                         }
1435
1436                         // Given that the content models should match, the current selected
1437                         // format should be supported.
1438                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1439                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1440
1441                                         'prev' => $this->contentFormat,
1442                                         'new' => $rev->getContentFormat(),
1443                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1444                                         'method' => __METHOD__
1445                                 ] );
1446                                 $this->contentFormat = $rev->getContentFormat();
1447                         }
1448                 }
1449                 return $content;
1450         }
1451
1452         /**
1453          * Use this method before edit() to preload some content into the edit box
1454          *
1455          * @param Content $content
1456          *
1457          * @since 1.21
1458          */
1459         public function setPreloadedContent( Content $content ) {
1460                 $this->mPreloadContent = $content;
1461         }
1462
1463         /**
1464          * Get the contents to be preloaded into the box, either set by
1465          * an earlier setPreloadText() or by loading the given page.
1466          *
1467          * @param string $preload Representing the title to preload from.
1468          * @param array $params Parameters to use (interface-message style) in the preloaded text
1469          *
1470          * @return Content
1471          *
1472          * @since 1.21
1473          */
1474         protected function getPreloadedContent( $preload, $params = [] ) {
1475                 if ( !empty( $this->mPreloadContent ) ) {
1476                         return $this->mPreloadContent;
1477                 }
1478
1479                 $handler = ContentHandler::getForModelID( $this->contentModel );
1480
1481                 if ( $preload === '' ) {
1482                         return $handler->makeEmptyContent();
1483                 }
1484
1485                 $user = $this->context->getUser();
1486                 $title = Title::newFromText( $preload );
1487
1488                 # Check for existence to avoid getting MediaWiki:Noarticletext
1489                 if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1490                         // TODO: somehow show a warning to the user!
1491                         return $handler->makeEmptyContent();
1492                 }
1493
1494                 $page = WikiPage::factory( $title );
1495                 if ( $page->isRedirect() ) {
1496                         $title = $page->getRedirectTarget();
1497                         # Same as before
1498                         if ( !$this->isPageExistingAndViewable( $title, $user ) ) {
1499                                 // TODO: somehow show a warning to the user!
1500                                 return $handler->makeEmptyContent();
1501                         }
1502                         $page = WikiPage::factory( $title );
1503                 }
1504
1505                 $parserOptions = ParserOptions::newFromUser( $user );
1506                 $content = $page->getContent( Revision::RAW );
1507
1508                 if ( !$content ) {
1509                         // TODO: somehow show a warning to the user!
1510                         return $handler->makeEmptyContent();
1511                 }
1512
1513                 if ( $content->getModel() !== $handler->getModelID() ) {
1514                         $converted = $content->convert( $handler->getModelID() );
1515
1516                         if ( !$converted ) {
1517                                 // TODO: somehow show a warning to the user!
1518                                 wfDebug( "Attempt to preload incompatible content: " .
1519                                         "can't convert " . $content->getModel() .
1520                                         " to " . $handler->getModelID() );
1521
1522                                 return $handler->makeEmptyContent();
1523                         }
1524
1525                         $content = $converted;
1526                 }
1527
1528                 return $content->preloadTransform( $title, $parserOptions, $params );
1529         }
1530
1531         /**
1532          * Verify if a given title exists and the given user is allowed to view it
1533          *
1534          * @see EditPage::getPreloadedContent()
1535          * @param Title|null $title
1536          * @param User $user
1537          * @return bool
1538          * @throws Exception
1539          */
1540         private function isPageExistingAndViewable( $title, User $user ) {
1541                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1542
1543                 return $title && $title->exists() && $permissionManager->userCan( 'read', $user, $title );
1544         }
1545
1546         /**
1547          * Make sure the form isn't faking a user's credentials.
1548          *
1549          * @param WebRequest &$request
1550          * @return bool
1551          * @private
1552          */
1553         public function tokenOk( &$request ) {
1554                 $token = $request->getVal( 'wpEditToken' );
1555                 $user = $this->context->getUser();
1556                 $this->mTokenOk = $user->matchEditToken( $token );
1557                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1558                 return $this->mTokenOk;
1559         }
1560
1561         /**
1562          * Sets post-edit cookie indicating the user just saved a particular revision.
1563          *
1564          * This uses a temporary cookie for each revision ID so separate saves will never
1565          * interfere with each other.
1566          *
1567          * Article::view deletes the cookie on server-side after the redirect and
1568          * converts the value to the global JavaScript variable wgPostEdit.
1569          *
1570          * If the variable were set on the server, it would be cached, which is unwanted
1571          * since the post-edit state should only apply to the load right after the save.
1572          *
1573          * @param int $statusValue The status value (to check for new article status)
1574          */
1575         protected function setPostEditCookie( $statusValue ) {
1576                 $revisionId = $this->page->getLatest();
1577                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1578
1579                 $val = 'saved';
1580                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1581                         $val = 'created';
1582                 } elseif ( $this->oldid ) {
1583                         $val = 'restored';
1584                 }
1585
1586                 $response = $this->context->getRequest()->response();
1587                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1588         }
1589
1590         /**
1591          * Attempt submission
1592          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1593          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1594          * @return Status The resulting status object.
1595          */
1596         public function attemptSave( &$resultDetails = false ) {
1597                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1598                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1599                 // This is needed since PageUpdater no longer checks these rights!
1600
1601                 // Allow bots to exempt some edits from bot flagging
1602                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1603                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1604
1605                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1606
1607                 return $status;
1608         }
1609
1610         /**
1611          * Log when a page was successfully saved after the edit conflict view
1612          */
1613         private function incrementResolvedConflicts() {
1614                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1615                         return;
1616                 }
1617
1618                 $this->getEditConflictHelper()->incrementResolvedStats();
1619         }
1620
1621         /**
1622          * Handle status, such as after attempt save
1623          *
1624          * @param Status $status
1625          * @param array|bool $resultDetails
1626          *
1627          * @throws ErrorPageError
1628          * @return bool False, if output is done, true if rest of the form should be displayed
1629          */
1630         private function handleStatus( Status $status, $resultDetails ) {
1631                 /**
1632                  * @todo FIXME: once the interface for internalAttemptSave() is made
1633                  *   nicer, this should use the message in $status
1634                  */
1635                 if ( $status->value == self::AS_SUCCESS_UPDATE
1636                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1637                 ) {
1638                         $this->incrementResolvedConflicts();
1639
1640                         $this->didSave = true;
1641                         if ( !$resultDetails['nullEdit'] ) {
1642                                 $this->setPostEditCookie( $status->value );
1643                         }
1644                 }
1645
1646                 $out = $this->context->getOutput();
1647
1648                 // "wpExtraQueryRedirect" is a hidden input to modify
1649                 // after save URL and is not used by actual edit form
1650                 $request = $this->context->getRequest();
1651                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1652
1653                 switch ( $status->value ) {
1654                         case self::AS_HOOK_ERROR_EXPECTED:
1655                         case self::AS_CONTENT_TOO_BIG:
1656                         case self::AS_ARTICLE_WAS_DELETED:
1657                         case self::AS_CONFLICT_DETECTED:
1658                         case self::AS_SUMMARY_NEEDED:
1659                         case self::AS_TEXTBOX_EMPTY:
1660                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1661                         case self::AS_END:
1662                         case self::AS_BLANK_ARTICLE:
1663                         case self::AS_SELF_REDIRECT:
1664                                 return true;
1665
1666                         case self::AS_HOOK_ERROR:
1667                                 return false;
1668
1669                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1670                         case self::AS_PARSE_ERROR:
1671                         case self::AS_UNICODE_NOT_SUPPORTED:
1672                                 $out->wrapWikiTextAsInterface( 'error', $status->getWikiText() );
1673                                 return true;
1674
1675                         case self::AS_SUCCESS_NEW_ARTICLE:
1676                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1677                                 if ( $extraQueryRedirect ) {
1678                                         if ( $query !== '' ) {
1679                                                 $query .= '&';
1680                                         }
1681                                         $query .= $extraQueryRedirect;
1682                                 }
1683                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1684                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1685                                 return false;
1686
1687                         case self::AS_SUCCESS_UPDATE:
1688                                 $extraQuery = '';
1689                                 $sectionanchor = $resultDetails['sectionanchor'];
1690
1691                                 // Give extensions a chance to modify URL query on update
1692                                 Hooks::run(
1693                                         'ArticleUpdateBeforeRedirect',
1694                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1695                                 );
1696
1697                                 if ( $resultDetails['redirect'] ) {
1698                                         if ( $extraQuery !== '' ) {
1699                                                 $extraQuery = '&' . $extraQuery;
1700                                         }
1701                                         $extraQuery = 'redirect=no' . $extraQuery;
1702                                 }
1703                                 if ( $extraQueryRedirect ) {
1704                                         if ( $extraQuery !== '' ) {
1705                                                 $extraQuery .= '&';
1706                                         }
1707                                         $extraQuery .= $extraQueryRedirect;
1708                                 }
1709
1710                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1711                                 return false;
1712
1713                         case self::AS_SPAM_ERROR:
1714                                 $this->spamPageWithContent( $resultDetails['spam'] );
1715                                 return false;
1716
1717                         case self::AS_BLOCKED_PAGE_FOR_USER:
1718                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1719
1720                         case self::AS_IMAGE_REDIRECT_ANON:
1721                         case self::AS_IMAGE_REDIRECT_LOGGED:
1722                                 throw new PermissionsError( 'upload' );
1723
1724                         case self::AS_READ_ONLY_PAGE_ANON:
1725                         case self::AS_READ_ONLY_PAGE_LOGGED:
1726                                 throw new PermissionsError( 'edit' );
1727
1728                         case self::AS_READ_ONLY_PAGE:
1729                                 throw new ReadOnlyError;
1730
1731                         case self::AS_RATE_LIMITED:
1732                                 throw new ThrottledError();
1733
1734                         case self::AS_NO_CREATE_PERMISSION:
1735                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1736                                 throw new PermissionsError( $permission );
1737
1738                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1739                                 throw new PermissionsError( 'editcontentmodel' );
1740
1741                         default:
1742                                 // We don't recognize $status->value. The only way that can happen
1743                                 // is if an extension hook aborted from inside ArticleSave.
1744                                 // Render the status object into $this->hookError
1745                                 // FIXME this sucks, we should just use the Status object throughout
1746                                 $this->hookError = '<div class="error">' . "\n" . $status->getWikiText() .
1747                                         '</div>';
1748                                 return true;
1749                 }
1750         }
1751
1752         /**
1753          * Run hooks that can filter edits just before they get saved.
1754          *
1755          * @param Content $content The Content to filter.
1756          * @param Status $status For reporting the outcome to the caller
1757          * @param User $user The user performing the edit
1758          *
1759          * @return bool
1760          */
1761         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1762                 // Run old style post-section-merge edit filter
1763                 if ( $this->hookError != '' ) {
1764                         # ...or the hook could be expecting us to produce an error
1765                         $status->fatal( 'hookaborted' );
1766                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1767                         return false;
1768                 }
1769
1770                 // Run new style post-section-merge edit filter
1771                 if ( !Hooks::run( 'EditFilterMergedContent',
1772                                 [ $this->context, $content, $status, $this->summary,
1773                                 $user, $this->minoredit ] )
1774                 ) {
1775                         # Error messages etc. could be handled within the hook...
1776                         if ( $status->isGood() ) {
1777                                 $status->fatal( 'hookaborted' );
1778                                 // Not setting $this->hookError here is a hack to allow the hook
1779                                 // to cause a return to the edit page without $this->hookError
1780                                 // being set. This is used by ConfirmEdit to display a captcha
1781                                 // without any error message cruft.
1782                         } else {
1783                                 $this->hookError = $this->formatStatusErrors( $status );
1784                         }
1785                         // Use the existing $status->value if the hook set it
1786                         if ( !$status->value ) {
1787                                 $status->value = self::AS_HOOK_ERROR;
1788                         }
1789                         return false;
1790                 } elseif ( !$status->isOK() ) {
1791                         # ...or the hook could be expecting us to produce an error
1792                         // FIXME this sucks, we should just use the Status object throughout
1793                         $this->hookError = $this->formatStatusErrors( $status );
1794                         $status->fatal( 'hookaborted' );
1795                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1796                         return false;
1797                 }
1798
1799                 return true;
1800         }
1801
1802         /**
1803          * Wrap status errors in an errorbox for increased visibility
1804          *
1805          * @param Status $status
1806          * @return string Wikitext
1807          */
1808         private function formatStatusErrors( Status $status ) {
1809                 $errmsg = $status->getWikiText(
1810                         'edit-error-short',
1811                         'edit-error-long',
1812                         $this->context->getLanguage()
1813                 );
1814                 return <<<ERROR
1815 <div class="errorbox">
1816 {$errmsg}
1817 </div>
1818 <br clear="all" />
1819 ERROR;
1820         }
1821
1822         /**
1823          * Return the summary to be used for a new section.
1824          *
1825          * @param string $sectionanchor Set to the section anchor text
1826          * @return string
1827          */
1828         private function newSectionSummary( &$sectionanchor = null ) {
1829                 if ( $this->sectiontitle !== '' ) {
1830                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1831                         // If no edit summary was specified, create one automatically from the section
1832                         // title and have it link to the new section. Otherwise, respect the summary as
1833                         // passed.
1834                         if ( $this->summary === '' ) {
1835                                 $cleanSectionTitle = MediaWikiServices::getInstance()->getParser()
1836                                         ->stripSectionName( $this->sectiontitle );
1837                                 return $this->context->msg( 'newsectionsummary' )
1838                                         ->plaintextParams( $cleanSectionTitle )->inContentLanguage()->text();
1839                         }
1840                 } elseif ( $this->summary !== '' ) {
1841                         $sectionanchor = $this->guessSectionName( $this->summary );
1842                         # This is a new section, so create a link to the new section
1843                         # in the revision summary.
1844                         $cleanSummary = MediaWikiServices::getInstance()->getParser()
1845                                 ->stripSectionName( $this->summary );
1846                         return $this->context->msg( 'newsectionsummary' )
1847                                 ->plaintextParams( $cleanSummary )->inContentLanguage()->text();
1848                 }
1849                 return $this->summary;
1850         }
1851
1852         /**
1853          * Attempt submission (no UI)
1854          *
1855          * @param array &$result Array to add statuses to, currently with the
1856          *   possible keys:
1857          *   - spam (string): Spam string from content if any spam is detected by
1858          *     matchSpamRegex.
1859          *   - sectionanchor (string): Section anchor for a section save.
1860          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1861          *     false otherwise.
1862          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1863          *     revision is a redirect.
1864          * @param bool $bot True if edit is being made under the bot right.
1865          *
1866          * @return Status Status object, possibly with a message, but always with
1867          *   one of the AS_* constants in $status->value,
1868          *
1869          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1870          *   various error display idiosyncrasies. There are also lots of cases
1871          *   where error metadata is set in the object and retrieved later instead
1872          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1873          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1874          * time.
1875          */
1876         public function internalAttemptSave( &$result, $bot = false ) {
1877                 $status = Status::newGood();
1878                 $user = $this->context->getUser();
1879
1880                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1881                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1882                         $status->fatal( 'hookaborted' );
1883                         $status->value = self::AS_HOOK_ERROR;
1884                         return $status;
1885                 }
1886
1887                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1888                         $status->fatal( 'unicode-support-fail' );
1889                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1890                         return $status;
1891                 }
1892
1893                 $request = $this->context->getRequest();
1894                 $spam = $request->getText( 'wpAntispam' );
1895                 if ( $spam !== '' ) {
1896                         wfDebugLog(
1897                                 'SimpleAntiSpam',
1898                                 $user->getName() .
1899                                 ' editing "' .
1900                                 $this->mTitle->getPrefixedText() .
1901                                 '" submitted bogus field "' .
1902                                 $spam .
1903                                 '"'
1904                         );
1905                         $status->fatal( 'spamprotectionmatch', false );
1906                         $status->value = self::AS_SPAM_ERROR;
1907                         return $status;
1908                 }
1909
1910                 try {
1911                         # Construct Content object
1912                         $textbox_content = $this->toEditContent( $this->textbox1 );
1913                 } catch ( MWContentSerializationException $ex ) {
1914                         $status->fatal(
1915                                 'content-failed-to-parse',
1916                                 $this->contentModel,
1917                                 $this->contentFormat,
1918                                 $ex->getMessage()
1919                         );
1920                         $status->value = self::AS_PARSE_ERROR;
1921                         return $status;
1922                 }
1923
1924                 # Check image redirect
1925                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1926                         $textbox_content->isRedirect() &&
1927                         !$user->isAllowed( 'upload' )
1928                 ) {
1929                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1930                                 $status->setResult( false, $code );
1931
1932                                 return $status;
1933                 }
1934
1935                 # Check for spam
1936                 $match = self::matchSummarySpamRegex( $this->summary );
1937                 if ( $match === false && $this->section == 'new' ) {
1938                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1939                         # regular summaries, it is added to the actual wikitext.
1940                         if ( $this->sectiontitle !== '' ) {
1941                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1942                                 $match = self::matchSpamRegex( $this->sectiontitle );
1943                         } else {
1944                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1945                                 # is used with the 'summary' parameter.
1946                                 $match = self::matchSpamRegex( $this->summary );
1947                         }
1948                 }
1949                 if ( $match === false ) {
1950                         $match = self::matchSpamRegex( $this->textbox1 );
1951                 }
1952                 if ( $match !== false ) {
1953                         $result['spam'] = $match;
1954                         $ip = $request->getIP();
1955                         $pdbk = $this->mTitle->getPrefixedDBkey();
1956                         $match = str_replace( "\n", '', $match );
1957                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1958                         $status->fatal( 'spamprotectionmatch', $match );
1959                         $status->value = self::AS_SPAM_ERROR;
1960                         return $status;
1961                 }
1962                 if ( !Hooks::run(
1963                         'EditFilter',
1964                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1965                 ) {
1966                         # Error messages etc. could be handled within the hook...
1967                         $status->fatal( 'hookaborted' );
1968                         $status->value = self::AS_HOOK_ERROR;
1969                         return $status;
1970                 } elseif ( $this->hookError != '' ) {
1971                         # ...or the hook could be expecting us to produce an error
1972                         $status->fatal( 'hookaborted' );
1973                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1974                         return $status;
1975                 }
1976
1977                 if ( $user->isBlockedFrom( $this->mTitle ) ) {
1978                         // Auto-block user's IP if the account was "hard" blocked
1979                         if ( !wfReadOnly() ) {
1980                                 $user->spreadAnyEditBlock();
1981                         }
1982                         # Check block state against master, thus 'false'.
1983                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1984                         return $status;
1985                 }
1986
1987                 $this->contentLength = strlen( $this->textbox1 );
1988                 $config = $this->context->getConfig();
1989                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1990                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1991                         // Error will be displayed by showEditForm()
1992                         $this->tooBig = true;
1993                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1994                         return $status;
1995                 }
1996
1997                 if ( !$user->isAllowed( 'edit' ) ) {
1998                         if ( $user->isAnon() ) {
1999                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
2000                                 return $status;
2001                         } else {
2002                                 $status->fatal( 'readonlytext' );
2003                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
2004                                 return $status;
2005                         }
2006                 }
2007
2008                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
2009
2010                 $changingContentModel = false;
2011                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
2012                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
2013                                 $status->fatal( 'editpage-cannot-use-custom-model' );
2014                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
2015                                 return $status;
2016                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
2017                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2018                                 return $status;
2019                         }
2020                         // Make sure the user can edit the page under the new content model too
2021                         $titleWithNewContentModel = clone $this->mTitle;
2022                         $titleWithNewContentModel->setContentModel( $this->contentModel );
2023
2024                         $canEditModel = $permissionManager->userCan(
2025                                 'editcontentmodel',
2026                                 $user,
2027                                 $titleWithNewContentModel
2028                         );
2029
2030                         if (
2031                                 !$canEditModel
2032                                 || !$permissionManager->userCan( 'edit', $user, $titleWithNewContentModel )
2033                         ) {
2034                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
2035
2036                                 return $status;
2037                         }
2038
2039                         $changingContentModel = true;
2040                         $oldContentModel = $this->mTitle->getContentModel();
2041                 }
2042
2043                 if ( $this->changeTags ) {
2044                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
2045                                 $this->changeTags, $user );
2046                         if ( !$changeTagsStatus->isOK() ) {
2047                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
2048                                 return $changeTagsStatus;
2049                         }
2050                 }
2051
2052                 if ( wfReadOnly() ) {
2053                         $status->fatal( 'readonlytext' );
2054                         $status->value = self::AS_READ_ONLY_PAGE;
2055                         return $status;
2056                 }
2057                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
2058                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
2059                 ) {
2060                         $status->fatal( 'actionthrottledtext' );
2061                         $status->value = self::AS_RATE_LIMITED;
2062                         return $status;
2063                 }
2064
2065                 # If the article has been deleted while editing, don't save it without
2066                 # confirmation
2067                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
2068                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
2069                         return $status;
2070                 }
2071
2072                 # Load the page data from the master. If anything changes in the meantime,
2073                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2074                 $this->page->loadPageData( 'fromdbmaster' );
2075                 $new = !$this->page->exists();
2076
2077                 if ( $new ) {
2078                         // Late check for create permission, just in case *PARANOIA*
2079                         if ( !$permissionManager->userCan( 'create', $user, $this->mTitle ) ) {
2080                                 $status->fatal( 'nocreatetext' );
2081                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2082                                 wfDebug( __METHOD__ . ": no create permission\n" );
2083                                 return $status;
2084                         }
2085
2086                         // Don't save a new page if it's blank or if it's a MediaWiki:
2087                         // message with content equivalent to default (allow empty pages
2088                         // in this case to disable messages, see T52124)
2089                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2090                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2091                                 $defaultText = $defaultMessageText;
2092                         } else {
2093                                 $defaultText = '';
2094                         }
2095
2096                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2097                                 $this->blankArticle = true;
2098                                 $status->fatal( 'blankarticle' );
2099                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2100                                 return $status;
2101                         }
2102
2103                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2104                                 return $status;
2105                         }
2106
2107                         $content = $textbox_content;
2108
2109                         $result['sectionanchor'] = '';
2110                         if ( $this->section == 'new' ) {
2111                                 if ( $this->sectiontitle !== '' ) {
2112                                         // Insert the section title above the content.
2113                                         $content = $content->addSectionHeader( $this->sectiontitle );
2114                                 } elseif ( $this->summary !== '' ) {
2115                                         // Insert the section title above the content.
2116                                         $content = $content->addSectionHeader( $this->summary );
2117                                 }
2118                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2119                         }
2120
2121                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2122
2123                 } else { # not $new
2124
2125                         # Article exists. Check for edit conflict.
2126
2127                         $this->page->clear(); # Force reload of dates, etc.
2128                         $timestamp = $this->page->getTimestamp();
2129                         $latest = $this->page->getLatest();
2130
2131                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2132
2133                         // An edit conflict is detected if the current revision is different from the
2134                         // revision that was current when editing was initiated on the client.
2135                         // This is checked based on the timestamp and revision ID.
2136                         // TODO: the timestamp based check can probably go away now.
2137                         if ( $timestamp != $this->edittime
2138                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2139                         ) {
2140                                 $this->isConflict = true;
2141                                 if ( $this->section == 'new' ) {
2142                                         if ( $this->page->getUserText() == $user->getName() &&
2143                                                 $this->page->getComment() == $this->newSectionSummary()
2144                                         ) {
2145                                                 // Probably a duplicate submission of a new comment.
2146                                                 // This can happen when CDN resends a request after
2147                                                 // a timeout but the first one actually went through.
2148                                                 wfDebug( __METHOD__
2149                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2150                                         } else {
2151                                                 // New comment; suppress conflict.
2152                                                 $this->isConflict = false;
2153                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2154                                         }
2155                                 } elseif ( $this->section == ''
2156                                         && Revision::userWasLastToEdit(
2157                                                 DB_MASTER, $this->mTitle->getArticleID(),
2158                                                 $user->getId(), $this->edittime
2159                                         )
2160                                 ) {
2161                                         # Suppress edit conflict with self, except for section edits where merging is required.
2162                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2163                                         $this->isConflict = false;
2164                                 }
2165                         }
2166
2167                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2168                         if ( $this->sectiontitle !== '' ) {
2169                                 $sectionTitle = $this->sectiontitle;
2170                         } else {
2171                                 $sectionTitle = $this->summary;
2172                         }
2173
2174                         $content = null;
2175
2176                         if ( $this->isConflict ) {
2177                                 wfDebug( __METHOD__
2178                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2179                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2180                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2181                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2182                                 if ( $this->editRevId !== null ) {
2183                                         $content = $this->page->replaceSectionAtRev(
2184                                                 $this->section,
2185                                                 $textbox_content,
2186                                                 $sectionTitle,
2187                                                 $this->editRevId
2188                                         );
2189                                 } else {
2190                                         $content = $this->page->replaceSectionContent(
2191                                                 $this->section,
2192                                                 $textbox_content,
2193                                                 $sectionTitle,
2194                                                 $this->edittime
2195                                         );
2196                                 }
2197                         } else {
2198                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2199                                 $content = $this->page->replaceSectionContent(
2200                                         $this->section,
2201                                         $textbox_content,
2202                                         $sectionTitle
2203                                 );
2204                         }
2205
2206                         if ( is_null( $content ) ) {
2207                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2208                                 $this->isConflict = true;
2209                                 $content = $textbox_content; // do not try to merge here!
2210                         } elseif ( $this->isConflict ) {
2211                                 # Attempt merge
2212                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2213                                         // Successful merge! Maybe we should tell the user the good news?
2214                                         $this->isConflict = false;
2215                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2216                                 } else {
2217                                         $this->section = '';
2218                                         $this->textbox1 = ContentHandler::getContentText( $content );
2219                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2220                                 }
2221                         }
2222
2223                         if ( $this->isConflict ) {
2224                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2225                                 return $status;
2226                         }
2227
2228                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2229                                 return $status;
2230                         }
2231
2232                         if ( $this->section == 'new' ) {
2233                                 // Handle the user preference to force summaries here
2234                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2235                                         $this->missingSummary = true;
2236                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2237                                         $status->value = self::AS_SUMMARY_NEEDED;
2238                                         return $status;
2239                                 }
2240
2241                                 // Do not allow the user to post an empty comment
2242                                 if ( $this->textbox1 == '' ) {
2243                                         $this->missingComment = true;
2244                                         $status->fatal( 'missingcommenttext' );
2245                                         $status->value = self::AS_TEXTBOX_EMPTY;
2246                                         return $status;
2247                                 }
2248                         } elseif ( !$this->allowBlankSummary
2249                                 && !$content->equals( $this->getOriginalContent( $user ) )
2250                                 && !$content->isRedirect()
2251                                 && md5( $this->summary ) == $this->autoSumm
2252                         ) {
2253                                 $this->missingSummary = true;
2254                                 $status->fatal( 'missingsummary' );
2255                                 $status->value = self::AS_SUMMARY_NEEDED;
2256                                 return $status;
2257                         }
2258
2259                         # All's well
2260                         $sectionanchor = '';
2261                         if ( $this->section == 'new' ) {
2262                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2263                         } elseif ( $this->section != '' ) {
2264                                 # Try to get a section anchor from the section source, redirect
2265                                 # to edited section if header found.
2266                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2267                                 # for duplicate heading checking and maybe parsing.
2268                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2269                                 # We can't deal with anchors, includes, html etc in the header for now,
2270                                 # headline would need to be parsed to improve this.
2271                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2272                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2273                                 }
2274                         }
2275                         $result['sectionanchor'] = $sectionanchor;
2276
2277                         // Save errors may fall down to the edit form, but we've now
2278                         // merged the section into full text. Clear the section field
2279                         // so that later submission of conflict forms won't try to
2280                         // replace that into a duplicated mess.
2281                         $this->textbox1 = $this->toEditText( $content );
2282                         $this->section = '';
2283
2284                         $status->value = self::AS_SUCCESS_UPDATE;
2285                 }
2286
2287                 if ( !$this->allowSelfRedirect
2288                         && $content->isRedirect()
2289                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2290                 ) {
2291                         // If the page already redirects to itself, don't warn.
2292                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2293                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2294                                 $this->selfRedirect = true;
2295                                 $status->fatal( 'selfredirect' );
2296                                 $status->value = self::AS_SELF_REDIRECT;
2297                                 return $status;
2298                         }
2299                 }
2300
2301                 // Check for length errors again now that the section is merged in
2302                 $this->contentLength = strlen( $this->toEditText( $content ) );
2303                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2304                         $this->tooBig = true;
2305                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2306                         return $status;
2307                 }
2308
2309                 $flags = EDIT_AUTOSUMMARY |
2310                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2311                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2312                         ( $bot ? EDIT_FORCE_BOT : 0 );
2313
2314                 $doEditStatus = $this->page->doEditContent(
2315                         $content,
2316                         $this->summary,
2317                         $flags,
2318                         false,
2319                         $user,
2320                         $content->getDefaultFormat(),
2321                         $this->changeTags,
2322                         $this->undidRev
2323                 );
2324
2325                 if ( !$doEditStatus->isOK() ) {
2326                         // Failure from doEdit()
2327                         // Show the edit conflict page for certain recognized errors from doEdit(),
2328                         // but don't show it for errors from extension hooks
2329                         $errors = $doEditStatus->getErrorsArray();
2330                         if ( in_array( $errors[0][0],
2331                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2332                         ) {
2333                                 $this->isConflict = true;
2334                                 // Destroys data doEdit() put in $status->value but who cares
2335                                 $doEditStatus->value = self::AS_END;
2336                         }
2337                         return $doEditStatus;
2338                 }
2339
2340                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2341                 if ( $result['nullEdit'] ) {
2342                         // We don't know if it was a null edit until now, so increment here
2343                         $user->pingLimiter( 'linkpurge' );
2344                 }
2345                 $result['redirect'] = $content->isRedirect();
2346
2347                 $this->updateWatchlist();
2348
2349                 // If the content model changed, add a log entry
2350                 if ( $changingContentModel ) {
2351                         $this->addContentModelChangeLogEntry(
2352                                 $user,
2353                                 $new ? false : $oldContentModel,
2354                                 $this->contentModel,
2355                                 $this->summary
2356                         );
2357                 }
2358
2359                 return $status;
2360         }
2361
2362         /**
2363          * @param User $user
2364          * @param string|false $oldModel false if the page is being newly created
2365          * @param string $newModel
2366          * @param string $reason
2367          */
2368         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2369                 $new = $oldModel === false;
2370                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2371                 $log->setPerformer( $user );
2372                 $log->setTarget( $this->mTitle );
2373                 $log->setComment( $reason );
2374                 $log->setParameters( [
2375                         '4::oldmodel' => $oldModel,
2376                         '5::newmodel' => $newModel
2377                 ] );
2378                 $logid = $log->insert();
2379                 $log->publish( $logid );
2380         }
2381
2382         /**
2383          * Register the change of watch status
2384          */
2385         protected function updateWatchlist() {
2386                 $user = $this->context->getUser();
2387                 if ( !$user->isLoggedIn() ) {
2388                         return;
2389                 }
2390
2391                 $title = $this->mTitle;
2392                 $watch = $this->watchthis;
2393                 // Do this in its own transaction to reduce contention...
2394                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2395                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2396                                 return; // nothing to change
2397                         }
2398                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2399                 } );
2400         }
2401
2402         /**
2403          * Attempts to do 3-way merge of edit content with a base revision
2404          * and current content, in case of edit conflict, in whichever way appropriate
2405          * for the content type.
2406          *
2407          * @since 1.21
2408          *
2409          * @param Content $editContent
2410          *
2411          * @return bool
2412          */
2413         private function mergeChangesIntoContent( &$editContent ) {
2414                 $db = wfGetDB( DB_MASTER );
2415
2416                 // This is the revision that was current at the time editing was initiated on the client,
2417                 // even if the edit was based on an old revision.
2418                 $baseRevision = $this->getBaseRevision();
2419                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2420
2421                 if ( is_null( $baseContent ) ) {
2422                         return false;
2423                 }
2424
2425                 // The current state, we want to merge updates into it
2426                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2427                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2428
2429                 if ( is_null( $currentContent ) ) {
2430                         return false;
2431                 }
2432
2433                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2434
2435                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2436
2437                 if ( $result ) {
2438                         $editContent = $result;
2439                         // Update parentRevId to what we just merged.
2440                         $this->parentRevId = $currentRevision->getId();
2441                         return true;
2442                 }
2443
2444                 return false;
2445         }
2446
2447         /**
2448          * Returns the revision that was current at the time editing was initiated on the client,
2449          * even if the edit was based on an old revision.
2450          *
2451          * @warning this method is very poorly named. If the user opened the form with ?oldid=X,
2452          *        one might think of X as the "base revision", which is NOT what this returns,
2453          *        see oldid for that. One might further assume that this corresponds to the $baseRevId
2454          *        parameter of WikiPage::doEditContent, which is not the case either.
2455          *        getExpectedParentRevision() would perhaps be a better name.
2456          *
2457          * @return Revision|null Current version when editing was initiated on the client
2458          */
2459         public function getBaseRevision() {
2460                 if ( !$this->mBaseRevision ) {
2461                         $db = wfGetDB( DB_MASTER );
2462                         $this->mBaseRevision = $this->editRevId
2463                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2464                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2465                 }
2466                 return $this->mBaseRevision;
2467         }
2468
2469         /**
2470          * Check given input text against $wgSpamRegex, and return the text of the first match.
2471          *
2472          * @param string $text
2473          *
2474          * @return string|bool Matching string or false
2475          */
2476         public static function matchSpamRegex( $text ) {
2477                 global $wgSpamRegex;
2478                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2479                 $regexes = (array)$wgSpamRegex;
2480                 return self::matchSpamRegexInternal( $text, $regexes );
2481         }
2482
2483         /**
2484          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2485          *
2486          * @param string $text
2487          *
2488          * @return string|bool Matching string or false
2489          */
2490         public static function matchSummarySpamRegex( $text ) {
2491                 global $wgSummarySpamRegex;
2492                 $regexes = (array)$wgSummarySpamRegex;
2493                 return self::matchSpamRegexInternal( $text, $regexes );
2494         }
2495
2496         /**
2497          * @param string $text
2498          * @param array $regexes
2499          * @return bool|string
2500          */
2501         protected static function matchSpamRegexInternal( $text, $regexes ) {
2502                 foreach ( $regexes as $regex ) {
2503                         $matches = [];
2504                         if ( preg_match( $regex, $text, $matches ) ) {
2505                                 return $matches[0];
2506                         }
2507                 }
2508                 return false;
2509         }
2510
2511         public function setHeaders() {
2512                 $out = $this->context->getOutput();
2513
2514                 $out->addModules( 'mediawiki.action.edit' );
2515                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2516                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2517
2518                 $user = $this->context->getUser();
2519
2520                 if ( $user->getOption( 'uselivepreview' ) ) {
2521                         $out->addModules( 'mediawiki.action.edit.preview' );
2522                 }
2523
2524                 if ( $user->getOption( 'useeditwarning' ) ) {
2525                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2526                 }
2527
2528                 # Enabled article-related sidebar, toplinks, etc.
2529                 $out->setArticleRelated( true );
2530
2531                 $contextTitle = $this->getContextTitle();
2532                 if ( $this->isConflict ) {
2533                         $msg = 'editconflict';
2534                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2535                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2536                 } else {
2537                         $msg = $contextTitle->exists()
2538                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2539                                         && $contextTitle->getDefaultMessageText() !== false
2540                                 )
2541                                 ? 'editing'
2542                                 : 'creating';
2543                 }
2544
2545                 # Use the title defined by DISPLAYTITLE magic word when present
2546                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2547                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2548                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2549                 if ( $displayTitle === false ) {
2550                         $displayTitle = $contextTitle->getPrefixedText();
2551                 } else {
2552                         $out->setDisplayTitle( $displayTitle );
2553                 }
2554                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2555
2556                 $config = $this->context->getConfig();
2557
2558                 # Transmit the name of the message to JavaScript for live preview
2559                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2560                 $out->addJsConfigVars( [
2561                         'wgEditMessage' => $msg,
2562                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2563                 ] );
2564
2565                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2566                 // editors, etc.
2567                 $out->addJsConfigVars(
2568                         'wgEditSubmitButtonLabelPublish',
2569                         $config->get( 'EditSubmitButtonLabelPublish' )
2570                 );
2571         }
2572
2573         /**
2574          * Show all applicable editing introductions
2575          */
2576         protected function showIntro() {
2577                 if ( $this->suppressIntro ) {
2578                         return;
2579                 }
2580
2581                 $out = $this->context->getOutput();
2582                 $namespace = $this->mTitle->getNamespace();
2583
2584                 if ( $namespace == NS_MEDIAWIKI ) {
2585                         # Show a warning if editing an interface message
2586                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2587                         # If this is a default message (but not css, json, or js),
2588                         # show a hint that it is translatable on translatewiki.net
2589                         if (
2590                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2591                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2592                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2593                         ) {
2594                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2595                                 if ( $defaultMessageText !== false ) {
2596                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2597                                                 'translateinterface' );
2598                                 }
2599                         }
2600                 } elseif ( $namespace == NS_FILE ) {
2601                         # Show a hint to shared repo
2602                         $file = wfFindFile( $this->mTitle );
2603                         if ( $file && !$file->isLocal() ) {
2604                                 $descUrl = $file->getDescriptionUrl();
2605                                 # there must be a description url to show a hint to shared repo
2606                                 if ( $descUrl ) {
2607                                         if ( !$this->mTitle->exists() ) {
2608                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2609                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2610                                                 ] );
2611                                         } else {
2612                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2613                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2614                                                 ] );
2615                                         }
2616                                 }
2617                         }
2618                 }
2619
2620                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2621                 # Show log extract when the user is currently blocked
2622                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2623                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2624                         $user = User::newFromName( $username, false /* allow IP users */ );
2625                         $ip = User::isIP( $username );
2626                         $block = DatabaseBlock::newFromTarget( $user, $user );
2627                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2628                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2629                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2630                         } elseif (
2631                                 !is_null( $block ) &&
2632                                 $block->getType() != DatabaseBlock::TYPE_AUTO &&
2633                                 ( $block->isSitewide() || $user->isBlockedFrom( $this->mTitle ) )
2634                         ) {
2635                                 // Show log extract if the user is sitewide blocked or is partially
2636                                 // blocked and not allowed to edit their user page or user talk page
2637                                 LogEventsList::showLogExtract(
2638                                         $out,
2639                                         'block',
2640                                         MediaWikiServices::getInstance()->getNamespaceInfo()->
2641                                                 getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2642                                         '',
2643                                         [
2644                                                 'lim' => 1,
2645                                                 'showIfEmpty' => false,
2646                                                 'msgKey' => [
2647                                                         'blocked-notice-logextract',
2648                                                         $user->getName() # Support GENDER in notice
2649                                                 ]
2650                                         ]
2651                                 );
2652                         }
2653                 }
2654                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2655                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2656                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2657                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2658                         ) );
2659                         if ( $this->context->getUser()->isLoggedIn() ) {
2660                                 $out->wrapWikiMsg(
2661                                         // Suppress the external link icon, consider the help url an internal one
2662                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2663                                         [
2664                                                 'newarticletext',
2665                                                 $helpLink
2666                                         ]
2667                                 );
2668                         } else {
2669                                 $out->wrapWikiMsg(
2670                                         // Suppress the external link icon, consider the help url an internal one
2671                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2672                                         [
2673                                                 'newarticletextanon',
2674                                                 $helpLink
2675                                         ]
2676                                 );
2677                         }
2678                 }
2679                 # Give a notice if the user is editing a deleted/moved page...
2680                 if ( !$this->mTitle->exists() ) {
2681                         $dbr = wfGetDB( DB_REPLICA );
2682
2683                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2684                                 '',
2685                                 [
2686                                         'lim' => 10,
2687                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2688                                         'showIfEmpty' => false,
2689                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2690                                 ]
2691                         );
2692                 }
2693         }
2694
2695         /**
2696          * Attempt to show a custom editing introduction, if supplied
2697          *
2698          * @return bool
2699          */
2700         protected function showCustomIntro() {
2701                 if ( $this->editintro ) {
2702                         $title = Title::newFromText( $this->editintro );
2703                         if ( $this->isPageExistingAndViewable( $title, $this->context->getUser() ) ) {
2704                                 // Added using template syntax, to take <noinclude>'s into account.
2705                                 $this->context->getOutput()->addWikiTextAsContent(
2706                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2707                                         /*linestart*/true,
2708                                         $this->mTitle
2709                                 );
2710                                 return true;
2711                         }
2712                 }
2713                 return false;
2714         }
2715
2716         /**
2717          * Gets an editable textual representation of $content.
2718          * The textual representation can be turned by into a Content object by the
2719          * toEditContent() method.
2720          *
2721          * If $content is null or false or a string, $content is returned unchanged.
2722          *
2723          * If the given Content object is not of a type that can be edited using
2724          * the text base EditPage, an exception will be raised. Set
2725          * $this->allowNonTextContent to true to allow editing of non-textual
2726          * content.
2727          *
2728          * @param Content|null|bool|string $content
2729          * @return string The editable text form of the content.
2730          *
2731          * @throws MWException If $content is not an instance of TextContent and
2732          *   $this->allowNonTextContent is not true.
2733          */
2734         protected function toEditText( $content ) {
2735                 if ( $content === null || $content === false || is_string( $content ) ) {
2736                         return $content;
2737                 }
2738
2739                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2740                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2741                 }
2742
2743                 return $content->serialize( $this->contentFormat );
2744         }
2745
2746         /**
2747          * Turns the given text into a Content object by unserializing it.
2748          *
2749          * If the resulting Content object is not of a type that can be edited using
2750          * the text base EditPage, an exception will be raised. Set
2751          * $this->allowNonTextContent to true to allow editing of non-textual
2752          * content.
2753          *
2754          * @param string|null|bool $text Text to unserialize
2755          * @return Content|bool|null The content object created from $text. If $text was false
2756          *   or null, then false or null will be returned instead.
2757          *
2758          * @throws MWException If unserializing the text results in a Content
2759          *   object that is not an instance of TextContent and
2760          *   $this->allowNonTextContent is not true.
2761          */
2762         protected function toEditContent( $text ) {
2763                 if ( $text === false || $text === null ) {
2764                         return $text;
2765                 }
2766
2767                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2768                         $this->contentModel, $this->contentFormat );
2769
2770                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2771                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2772                 }
2773
2774                 return $content;
2775         }
2776
2777         /**
2778          * Send the edit form and related headers to OutputPage
2779          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2780          *     during form output near the top, for captchas and the like.
2781          *
2782          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2783          * use the EditPage::showEditForm:fields hook instead.
2784          */
2785         public function showEditForm( $formCallback = null ) {
2786                 # need to parse the preview early so that we know which templates are used,
2787                 # otherwise users with "show preview after edit box" will get a blank list
2788                 # we parse this near the beginning so that setHeaders can do the title
2789                 # setting work instead of leaving it in getPreviewText
2790                 $previewOutput = '';
2791                 if ( $this->formtype == 'preview' ) {
2792                         $previewOutput = $this->getPreviewText();
2793                 }
2794
2795                 $out = $this->context->getOutput();
2796
2797                 // Avoid PHP 7.1 warning of passing $this by reference
2798                 $editPage = $this;
2799                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2800
2801                 $this->setHeaders();
2802
2803                 $this->addTalkPageText();
2804                 $this->addEditNotices();
2805
2806                 if ( !$this->isConflict &&
2807                         $this->section != '' &&
2808                         !$this->isSectionEditSupported() ) {
2809                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2810                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2811                         // Someone is welcome to try refactoring though
2812                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2813                         return;
2814                 }
2815
2816                 $this->showHeader();
2817
2818                 $out->addHTML( $this->editFormPageTop );
2819
2820                 $user = $this->context->getUser();
2821                 if ( $user->getOption( 'previewontop' ) ) {
2822                         $this->displayPreviewArea( $previewOutput, true );
2823                 }
2824
2825                 $out->addHTML( $this->editFormTextTop );
2826
2827                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype !== 'save' ) {
2828                         $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2829                                 'deletedwhileediting' );
2830                 }
2831
2832                 // @todo add EditForm plugin interface and use it here!
2833                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2834                 $out->addHTML( Html::openElement(
2835                         'form',
2836                         [
2837                                 'class' => 'mw-editform',
2838                                 'id' => self::EDITFORM_ID,
2839                                 'name' => self::EDITFORM_ID,
2840                                 'method' => 'post',
2841                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2842                                 'enctype' => 'multipart/form-data'
2843                         ]
2844                 ) );
2845
2846                 if ( is_callable( $formCallback ) ) {
2847                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2848                         call_user_func_array( $formCallback, [ &$out ] );
2849                 }
2850
2851                 // Add a check for Unicode support
2852                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2853
2854                 // Add an empty field to trip up spambots
2855                 $out->addHTML(
2856                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2857                         . Html::rawElement(
2858                                 'label',
2859                                 [ 'for' => 'wpAntispam' ],
2860                                 $this->context->msg( 'simpleantispam-label' )->parse()
2861                         )
2862                         . Xml::element(
2863                                 'input',
2864                                 [
2865                                         'type' => 'text',
2866                                         'name' => 'wpAntispam',
2867                                         'id' => 'wpAntispam',
2868                                         'value' => ''
2869                                 ]
2870                         )
2871                         . Xml::closeElement( 'div' )
2872                 );
2873
2874                 // Avoid PHP 7.1 warning of passing $this by reference
2875                 $editPage = $this;
2876                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2877
2878                 // Put these up at the top to ensure they aren't lost on early form submission
2879                 $this->showFormBeforeText();
2880
2881                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2882                         $username = $this->lastDelete->user_name;
2883                         $comment = CommentStore::getStore()
2884                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2885
2886                         // It is better to not parse the comment at all than to have templates expanded in the middle
2887                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2888                         $key = $comment === ''
2889                                 ? 'confirmrecreate-noreason'
2890                                 : 'confirmrecreate';
2891                         $out->addHTML(
2892                                 '<div class="mw-confirm-recreate">' .
2893                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2894                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2895                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2896                                 ) .
2897                                 '</div>'
2898                         );
2899                 }
2900
2901                 # When the summary is hidden, also hide them on preview/show changes
2902                 if ( $this->nosummary ) {
2903                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2904                 }
2905
2906                 # If a blank edit summary was previously provided, and the appropriate
2907                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2908                 # user being bounced back more than once in the event that a summary
2909                 # is not required.
2910                 # ####
2911                 # For a bit more sophisticated detection of blank summaries, hash the
2912                 # automatic one and pass that in the hidden field wpAutoSummary.
2913                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2914                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2915                 }
2916
2917                 if ( $this->undidRev ) {
2918                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2919                 }
2920
2921                 if ( $this->selfRedirect ) {
2922                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2923                 }
2924
2925                 if ( $this->hasPresetSummary ) {
2926                         // If a summary has been preset using &summary= we don't want to prompt for
2927                         // a different summary. Only prompt for a summary if the summary is blanked.
2928                         // (T19416)
2929                         $this->autoSumm = md5( '' );
2930                 }
2931
2932                 $autosumm = $this->autoSumm !== '' ? $this->autoSumm : md5( $this->summary );
2933                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2934
2935                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2936                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2937
2938                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2939                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2940
2941                 $out->enableOOUI();
2942
2943                 if ( $this->section == 'new' ) {
2944                         $this->showSummaryInput( true, $this->summary );
2945                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2946                 }
2947
2948                 $out->addHTML( $this->editFormTextBeforeContent );
2949                 if ( $this->isConflict ) {
2950                         // In an edit conflict, we turn textbox2 into the user's text,
2951                         // and textbox1 into the stored version
2952                         $this->textbox2 = $this->textbox1;
2953
2954                         $content = $this->getCurrentContent();
2955                         $this->textbox1 = $this->toEditText( $content );
2956
2957                         $editConflictHelper = $this->getEditConflictHelper();
2958                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2959                         $editConflictHelper->setContentModel( $this->contentModel );
2960                         $editConflictHelper->setContentFormat( $this->contentFormat );
2961                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2962                 }
2963
2964                 if ( !$this->mTitle->isUserConfigPage() ) {
2965                         $out->addHTML( self::getEditToolbar() );
2966                 }
2967
2968                 if ( $this->blankArticle ) {
2969                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2970                 }
2971
2972                 if ( $this->isConflict ) {
2973                         // In an edit conflict bypass the overridable content form method
2974                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2975                         // resolved between page source edits and custom ui edits using the
2976                         // custom edit ui.
2977                         $conflictTextBoxAttribs = [];
2978                         if ( $this->wasDeletedSinceLastEdit() ) {
2979                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2980                         } elseif ( $this->isOldRev ) {
2981                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2982                         }
2983
2984                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2985                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2986                 } else {
2987                         $this->showContentForm();
2988                 }
2989
2990                 $out->addHTML( $this->editFormTextAfterContent );
2991
2992                 $this->showStandardInputs();
2993
2994                 $this->showFormAfterText();
2995
2996                 $this->showTosSummary();
2997
2998                 $this->showEditTools();
2999
3000                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
3001
3002                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
3003
3004                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
3005                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
3006
3007                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
3008                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
3009
3010                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
3011
3012                 if ( $this->isConflict ) {
3013                         try {
3014                                 $this->showConflict();
3015                         } catch ( MWContentSerializationException $ex ) {
3016                                 // this can't really happen, but be nice if it does.
3017                                 $msg = $this->context->msg(
3018                                         'content-failed-to-parse',
3019                                         $this->contentModel,
3020                                         $this->contentFormat,
3021                                         $ex->getMessage()
3022                                 );
3023                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3024                         }
3025                 }
3026
3027                 // Set a hidden field so JS knows what edit form mode we are in
3028                 if ( $this->isConflict ) {
3029                         $mode = 'conflict';
3030                 } elseif ( $this->preview ) {
3031                         $mode = 'preview';
3032                 } elseif ( $this->diff ) {
3033                         $mode = 'diff';
3034                 } else {
3035                         $mode = 'text';
3036                 }
3037                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
3038
3039                 // Marker for detecting truncated form data.  This must be the last
3040                 // parameter sent in order to be of use, so do not move me.
3041                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
3042                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
3043
3044                 if ( !$user->getOption( 'previewontop' ) ) {
3045                         $this->displayPreviewArea( $previewOutput, false );
3046                 }
3047         }
3048
3049         /**
3050          * Wrapper around TemplatesOnThisPageFormatter to make
3051          * a "templates on this page" list.
3052          *
3053          * @param Title[] $templates
3054          * @return string HTML
3055          */
3056         public function makeTemplatesOnThisPageList( array $templates ) {
3057                 $templateListFormatter = new TemplatesOnThisPageFormatter(
3058                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
3059                 );
3060
3061                 // preview if preview, else section if section, else false
3062                 $type = false;
3063                 if ( $this->preview ) {
3064                         $type = 'preview';
3065                 } elseif ( $this->section != '' ) {
3066                         $type = 'section';
3067                 }
3068
3069                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
3070                         $templateListFormatter->format( $templates, $type )
3071                 );
3072         }
3073
3074         /**
3075          * Extract the section title from current section text, if any.
3076          *
3077          * @param string $text
3078          * @return string|bool String or false
3079          */
3080         public static function extractSectionTitle( $text ) {
3081                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
3082                 if ( !empty( $matches[2] ) ) {
3083                         return MediaWikiServices::getInstance()->getParser()
3084                                 ->stripSectionName( trim( $matches[2] ) );
3085                 } else {
3086                         return false;
3087                 }
3088         }
3089
3090         protected function showHeader() {
3091                 $out = $this->context->getOutput();
3092                 $user = $this->context->getUser();
3093                 if ( $this->isConflict ) {
3094                         $this->addExplainConflictHeader( $out );
3095                         $this->editRevId = $this->page->getLatest();
3096                 } else {
3097                         if ( $this->section != '' && $this->section != 'new' && !$this->summary &&
3098                                 !$this->preview && !$this->diff
3099                         ) {
3100                                 $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3101                                 if ( $sectionTitle !== false ) {
3102                                         $this->summary = "/* $sectionTitle */ ";
3103                                 }
3104                         }
3105
3106                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3107
3108                         if ( $this->missingComment ) {
3109                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3110                         }
3111
3112                         if ( $this->missingSummary && $this->section != 'new' ) {
3113                                 $out->wrapWikiMsg(
3114                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3115                                         [ 'missingsummary', $buttonLabel ]
3116                                 );
3117                         }
3118
3119                         if ( $this->missingSummary && $this->section == 'new' ) {
3120                                 $out->wrapWikiMsg(
3121                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3122                                         [ 'missingcommentheader', $buttonLabel ]
3123                                 );
3124                         }
3125
3126                         if ( $this->blankArticle ) {
3127                                 $out->wrapWikiMsg(
3128                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3129                                         [ 'blankarticle', $buttonLabel ]
3130                                 );
3131                         }
3132
3133                         if ( $this->selfRedirect ) {
3134                                 $out->wrapWikiMsg(
3135                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3136                                         [ 'selfredirect', $buttonLabel ]
3137                                 );
3138                         }
3139
3140                         if ( $this->hookError !== '' ) {
3141                                 $out->addWikiTextAsInterface( $this->hookError );
3142                         }
3143
3144                         if ( $this->section != 'new' ) {
3145                                 $revision = $this->mArticle->getRevisionFetched();
3146                                 if ( $revision ) {
3147                                         // Let sysop know that this will make private content public if saved
3148
3149                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3150                                                 $out->wrapWikiMsg(
3151                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3152                                                         'rev-deleted-text-permission'
3153                                                 );
3154                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3155                                                 $out->wrapWikiMsg(
3156                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3157                                                         'rev-deleted-text-view'
3158                                                 );
3159                                         }
3160
3161                                         if ( !$revision->isCurrent() ) {
3162                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3163                                                 $out->wrapWikiMsg(
3164                                                         Html::warningBox( "\n$1\n" ),
3165                                                         'editingold'
3166                                                 );
3167                                                 $this->isOldRev = true;
3168                                         }
3169                                 } elseif ( $this->mTitle->exists() ) {
3170                                         // Something went wrong
3171
3172                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3173                                                 [ 'missing-revision', $this->oldid ] );
3174                                 }
3175                         }
3176                 }
3177
3178                 if ( wfReadOnly() ) {
3179                         $out->wrapWikiMsg(
3180                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3181                                 [ 'readonlywarning', wfReadOnlyReason() ]
3182                         );
3183                 } elseif ( $user->isAnon() ) {
3184                         if ( $this->formtype != 'preview' ) {
3185                                 $returntoquery = array_diff_key(
3186                                         $this->context->getRequest()->getValues(),
3187                                         [ 'title' => true, 'returnto' => true, 'returntoquery' => true ]
3188                                 );
3189                                 $out->wrapWikiMsg(
3190                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3191                                         [ 'anoneditwarning',
3192                                                 // Log-in link
3193                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3194                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3195                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3196                                                 ] ),
3197                                                 // Sign-up link
3198                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3199                                                         'returnto' => $this->getTitle()->getPrefixedDBkey(),
3200                                                         'returntoquery' => wfArrayToCgi( $returntoquery ),
3201                                                 ] )
3202                                         ]
3203                                 );
3204                         } else {
3205                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3206                                         'anonpreviewwarning'
3207                                 );
3208                         }
3209                 } elseif ( $this->mTitle->isUserConfigPage() ) {
3210                         # Check the skin exists
3211                         if ( $this->isWrongCaseUserConfigPage() ) {
3212                                 $out->wrapWikiMsg(
3213                                         "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3214                                         [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3215                                 );
3216                         }
3217                         if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3218                                 $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3219                                 $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3220                                 $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3221
3222                                 $warning = $isUserCssConfig
3223                                         ? 'usercssispublic'
3224                                         : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3225
3226                                 $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3227
3228                                 if ( $this->formtype !== 'preview' ) {
3229                                         $config = $this->context->getConfig();
3230                                         if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3231                                                 $out->wrapWikiMsg(
3232                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3233                                                         [ 'usercssyoucanpreview' ]
3234                                                 );
3235                                         } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3236                                                 $out->wrapWikiMsg(
3237                                                         "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3238                                                         [ 'userjsonyoucanpreview' ]
3239                                                 );
3240                                         } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3241                                                 $out->wrapWikiMsg(
3242                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3243                                                         [ 'userjsyoucanpreview' ]
3244                                                 );
3245                                         }
3246                                 }
3247                         }
3248                 }
3249
3250                 $this->addPageProtectionWarningHeaders();
3251
3252                 $this->addLongPageWarningHeader();
3253
3254                 # Add header copyright warning
3255                 $this->showHeaderCopyrightWarning();
3256         }
3257
3258         /**
3259          * Helper function for summary input functions, which returns the necessary
3260          * attributes for the input.
3261          *
3262          * @param array|null $inputAttrs Array of attrs to use on the input
3263          * @return array
3264          */
3265         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3266                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3267                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3268                 // Unicode codepoints.
3269                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3270                         'id' => 'wpSummary',
3271                         'name' => 'wpSummary',
3272                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
3273                         'tabindex' => 1,
3274                         'size' => 60,
3275                         'spellcheck' => 'true',
3276                 ];
3277         }
3278
3279         /**
3280          * Builds a standard summary input with a label.
3281          *
3282          * @param string $summary The value of the summary input
3283          * @param string|null $labelText The html to place inside the label
3284          * @param array|null $inputAttrs Array of attrs to use on the input
3285          *
3286          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3287          */
3288         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3289                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3290                         $this->getSummaryInputAttributes( $inputAttrs )
3291                 );
3292                 $inputAttrs += [
3293                         'title' => Linker::titleAttrib( 'summary' ),
3294                         'accessKey' => Linker::accesskey( 'summary' ),
3295                 ];
3296
3297                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3298                 $inputAttrs['inputId'] = $inputAttrs['id'];
3299                 $inputAttrs['id'] = 'wpSummaryWidget';
3300
3301                 return new OOUI\FieldLayout(
3302                         new OOUI\TextInputWidget( [
3303                                 'value' => $summary,
3304                                 'infusable' => true,
3305                         ] + $inputAttrs ),
3306                         [
3307                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3308                                 'align' => 'top',
3309                                 'id' => 'wpSummaryLabel',
3310                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3311                         ]
3312                 );
3313         }
3314
3315         /**
3316          * @param bool $isSubjectPreview True if this is the section subject/title
3317          *   up top, or false if this is the comment summary
3318          *   down below the textarea
3319          * @param string $summary The text of the summary to display
3320          */
3321         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3322                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3323                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3324                 if ( $isSubjectPreview ) {
3325                         if ( $this->nosummary ) {
3326                                 return;
3327                         }
3328                 } elseif ( !$this->mShowSummaryField ) {
3329                         return;
3330                 }
3331
3332                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3333                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3334                                 $summary,
3335                                 $labelText,
3336                                 [ 'class' => $summaryClass ]
3337                         ) );
3338         }
3339
3340         /**
3341          * @param bool $isSubjectPreview True if this is the section subject/title
3342          *   up top, or false if this is the comment summary
3343          *   down below the textarea
3344          * @param string $summary The text of the summary to display
3345          * @return string
3346          */
3347         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3348                 // avoid spaces in preview, gets always trimmed on save
3349                 $summary = trim( $summary );
3350                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3351                         return "";
3352                 }
3353
3354                 if ( $isSubjectPreview ) {
3355                         $summary = $this->context->msg( 'newsectionsummary' )
3356                                 ->rawParams( MediaWikiServices::getInstance()->getParser()
3357                                         ->stripSectionName( $summary ) )
3358                                 ->inContentLanguage()->text();
3359                 }
3360
3361                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3362
3363                 $summary = $this->context->msg( $message )->parse()
3364                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3365                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3366         }
3367
3368         protected function showFormBeforeText() {
3369                 $out = $this->context->getOutput();
3370                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3371                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3372                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3373                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3374                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3375         }
3376
3377         protected function showFormAfterText() {
3378                 /**
3379                  * To make it harder for someone to slip a user a page
3380                  * which submits an edit form to the wiki without their
3381                  * knowledge, a random token is associated with the login
3382                  * session. If it's not passed back with the submission,
3383                  * we won't save the page, or render user JavaScript and
3384                  * CSS previews.
3385                  *
3386                  * For anon editors, who may not have a session, we just
3387                  * include the constant suffix to prevent editing from
3388                  * broken text-mangling proxies.
3389                  */
3390                 $this->context->getOutput()->addHTML(
3391                         "\n" .
3392                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3393                         "\n"
3394                 );
3395         }
3396
3397         /**
3398          * Subpage overridable method for printing the form for page content editing
3399          * By default this simply outputs wpTextbox1
3400          * Subclasses can override this to provide a custom UI for editing;
3401          * be it a form, or simply wpTextbox1 with a modified content that will be
3402          * reverse modified when extracted from the post data.
3403          * Note that this is basically the inverse for importContentFormData
3404          */
3405         protected function showContentForm() {
3406                 $this->showTextbox1();
3407         }
3408
3409         /**
3410          * Method to output wpTextbox1
3411          * The $textoverride method can be used by subclasses overriding showContentForm
3412          * to pass back to this method.
3413          *
3414          * @param array|null $customAttribs Array of html attributes to use in the textarea
3415          * @param string|null $textoverride Optional text to override $this->textarea1 with
3416          */
3417         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3418                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3419                         $attribs = [ 'style' => 'display:none;' ];
3420                 } else {
3421                         $builder = new TextboxBuilder();
3422                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3423
3424                         # Is an old revision being edited?
3425                         if ( $this->isOldRev ) {
3426                                 $classes[] = 'mw-textarea-oldrev';
3427                         }
3428
3429                         $attribs = [ 'tabindex' => 1 ];
3430
3431                         if ( is_array( $customAttribs ) ) {
3432                                 $attribs += $customAttribs;
3433                         }
3434
3435                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3436                 }
3437
3438                 $this->showTextbox(
3439                         $textoverride ?? $this->textbox1,
3440                         'wpTextbox1',
3441                         $attribs
3442                 );
3443         }
3444
3445         protected function showTextbox2() {
3446                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3447         }
3448
3449         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3450                 $builder = new TextboxBuilder();
3451                 $attribs = $builder->buildTextboxAttribs(
3452                         $name,
3453                         $customAttribs,
3454                         $this->context->getUser(),
3455                         $this->mTitle
3456                 );
3457
3458                 $this->context->getOutput()->addHTML(
3459                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3460                 );
3461         }
3462
3463         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3464                 $classes = [];
3465                 if ( $isOnTop ) {
3466                         $classes[] = 'ontop';
3467                 }
3468
3469                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3470
3471                 if ( $this->formtype != 'preview' ) {
3472                         $attribs['style'] = 'display: none;';
3473                 }
3474
3475                 $out = $this->context->getOutput();
3476                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3477
3478                 if ( $this->formtype == 'preview' ) {
3479                         $this->showPreview( $previewOutput );
3480                 } else {
3481                         // Empty content container for LivePreview
3482                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3483                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3484                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3485                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3486                 }
3487
3488                 $out->addHTML( '</div>' );
3489
3490                 if ( $this->formtype == 'diff' ) {
3491                         try {
3492                                 $this->showDiff();
3493                         } catch ( MWContentSerializationException $ex ) {
3494                                 $msg = $this->context->msg(
3495                                         'content-failed-to-parse',
3496                                         $this->contentModel,
3497                                         $this->contentFormat,
3498                                         $ex->getMessage()
3499                                 );
3500                                 $out->wrapWikiTextAsInterface( 'error', $msg->plain() );
3501                         }
3502                 }
3503         }
3504
3505         /**
3506          * Append preview output to OutputPage.
3507          * Includes category rendering if this is a category page.
3508          *
3509          * @param string $text The HTML to be output for the preview.
3510          */
3511         protected function showPreview( $text ) {
3512                 if ( $this->mArticle instanceof CategoryPage ) {
3513                         $this->mArticle->openShowCategory();
3514                 }
3515                 # This hook seems slightly odd here, but makes things more
3516                 # consistent for extensions.
3517                 $out = $this->context->getOutput();
3518                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3519                 $out->addHTML( $text );
3520                 if ( $this->mArticle instanceof CategoryPage ) {
3521                         $this->mArticle->closeShowCategory();
3522                 }
3523         }
3524
3525         /**
3526          * Get a diff between the current contents of the edit box and the
3527          * version of the page we're editing from.
3528          *
3529          * If this is a section edit, we'll replace the section as for final
3530          * save and then make a comparison.
3531          */
3532         public function showDiff() {
3533                 $oldtitlemsg = 'currentrev';
3534                 # if message does not exist, show diff against the preloaded default
3535                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3536                         $oldtext = $this->mTitle->getDefaultMessageText();
3537                         if ( $oldtext !== false ) {
3538                                 $oldtitlemsg = 'defaultmessagetext';
3539                                 $oldContent = $this->toEditContent( $oldtext );
3540                         } else {
3541                                 $oldContent = null;
3542                         }
3543                 } else {
3544                         $oldContent = $this->getCurrentContent();
3545                 }
3546
3547                 $textboxContent = $this->toEditContent( $this->textbox1 );
3548                 if ( $this->editRevId !== null ) {
3549                         $newContent = $this->page->replaceSectionAtRev(
3550                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3551                         );
3552                 } else {
3553                         $newContent = $this->page->replaceSectionContent(
3554                                 $this->section, $textboxContent, $this->summary, $this->edittime
3555                         );
3556                 }
3557
3558                 if ( $newContent ) {
3559                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3560
3561                         $user = $this->context->getUser();
3562                         $popts = ParserOptions::newFromUserAndLang( $user,
3563                                 MediaWikiServices::getInstance()->getContentLanguage() );
3564                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3565                 }
3566
3567                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3568                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3569                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3570
3571                         if ( !$oldContent ) {
3572                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3573                         }
3574
3575                         if ( !$newContent ) {
3576                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3577                         }
3578
3579                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3580                         $de->setContent( $oldContent, $newContent );
3581
3582                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3583                         $de->showDiffStyle();
3584                 } else {
3585                         $difftext = '';
3586                 }
3587
3588                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3589         }
3590
3591         /**
3592          * Show the header copyright warning.
3593          */
3594         protected function showHeaderCopyrightWarning() {
3595                 $msg = 'editpage-head-copy-warn';
3596                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3597                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3598                                 'editpage-head-copy-warn' );
3599                 }
3600         }
3601
3602         /**
3603          * Give a chance for site and per-namespace customizations of
3604          * terms of service summary link that might exist separately
3605          * from the copyright notice.
3606          *
3607          * This will display between the save button and the edit tools,
3608          * so should remain short!
3609          */
3610         protected function showTosSummary() {
3611                 $msg = 'editpage-tos-summary';
3612                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3613                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3614                         $out = $this->context->getOutput();
3615                         $out->addHTML( '<div class="mw-tos-summary">' );
3616                         $out->addWikiMsg( $msg );
3617                         $out->addHTML( '</div>' );
3618                 }
3619         }
3620
3621         /**
3622          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3623          * characters not present on most keyboards for copying/pasting.
3624          */
3625         protected function showEditTools() {
3626                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3627                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3628                         '</div>' );
3629         }
3630
3631         /**
3632          * Get the copyright warning
3633          *
3634          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3635          * @return string
3636          */
3637         protected function getCopywarn() {
3638                 return self::getCopyrightWarning( $this->mTitle );
3639         }
3640
3641         /**
3642          * Get the copyright warning, by default returns wikitext
3643          *
3644          * @param Title $title
3645          * @param string $format Output format, valid values are any function of a Message object
3646          * @param Language|string|null $langcode Language code or Language object.
3647          * @return string
3648          */
3649         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3650                 global $wgRightsText;
3651                 if ( $wgRightsText ) {
3652                         $copywarnMsg = [ 'copyrightwarning',
3653                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3654                                 $wgRightsText ];
3655                 } else {
3656                         $copywarnMsg = [ 'copyrightwarning2',
3657                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3658                 }
3659                 // Allow for site and per-namespace customization of contribution/copyright notice.
3660                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3661
3662                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3663                 if ( $langcode ) {
3664                         $msg->inLanguage( $langcode );
3665                 }
3666                 return "<div id=\"editpage-copywarn\">\n" .
3667                         $msg->$format() . "\n</div>";
3668         }
3669
3670         /**
3671          * Get the Limit report for page previews
3672          *
3673          * @since 1.22
3674          * @param ParserOutput|null $output ParserOutput object from the parse
3675          * @return string HTML
3676          */
3677         public static function getPreviewLimitReport( ParserOutput $output = null ) {
3678                 global $wgLang;
3679
3680                 if ( !$output || !$output->getLimitReportData() ) {
3681                         return '';
3682                 }
3683
3684                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3685                         wfMessage( 'limitreport-title' )->parseAsBlock()
3686                 );
3687
3688                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3689                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3690
3691                 $limitReport .= Html::openElement( 'table', [
3692                         'class' => 'preview-limit-report wikitable'
3693                 ] ) .
3694                         Html::openElement( 'tbody' );
3695
3696                 foreach ( $output->getLimitReportData() as $key => $value ) {
3697                         if ( Hooks::run( 'ParserLimitReportFormat',
3698                                 [ $key, &$value, &$limitReport, true, true ]
3699                         ) ) {
3700                                 $keyMsg = wfMessage( $key );
3701                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3702                                 if ( !$valueMsg->exists() ) {
3703                                         $valueMsg = new RawMessage( '$1' );
3704                                 }
3705                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3706                                         $limitReport .= Html::openElement( 'tr' ) .
3707                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3708                                                 Html::rawElement( 'td', null,
3709                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3710                                                 ) .
3711                                                 Html::closeElement( 'tr' );
3712                                 }
3713                         }
3714                 }
3715
3716                 $limitReport .= Html::closeElement( 'tbody' ) .
3717                         Html::closeElement( 'table' ) .
3718                         Html::closeElement( 'div' );
3719
3720                 return $limitReport;
3721         }
3722
3723         protected function showStandardInputs( &$tabindex = 2 ) {
3724                 $out = $this->context->getOutput();
3725                 $out->addHTML( "<div class='editOptions'>\n" );
3726
3727                 if ( $this->section != 'new' ) {
3728                         $this->showSummaryInput( false, $this->summary );
3729                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3730                 }
3731
3732                 $checkboxes = $this->getCheckboxesWidget(
3733                         $tabindex,
3734                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3735                 );
3736                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3737
3738                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3739
3740                 // Show copyright warning.
3741                 $out->addWikiTextAsInterface( $this->getCopywarn() );
3742                 $out->addHTML( $this->editFormTextAfterWarn );
3743
3744                 $out->addHTML( "<div class='editButtons'>\n" );
3745                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3746
3747                 $cancel = $this->getCancelLink();
3748
3749                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3750                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3751                 $edithelp =
3752                         Html::linkButton(
3753                                 $this->context->msg( 'edithelp' )->text(),
3754                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3755                                 [ 'mw-ui-quiet' ]
3756                         ) .
3757                         $this->context->msg( 'word-separator' )->escaped() .
3758                         $this->context->msg( 'newwindow' )->parse();
3759
3760                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3761                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3762                 $out->addHTML( "</div><!-- editButtons -->\n" );
3763
3764                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3765
3766                 $out->addHTML( "</div><!-- editOptions -->\n" );
3767         }
3768
3769         /**
3770          * Show an edit conflict. textbox1 is already shown in showEditForm().
3771          * If you want to use another entry point to this function, be careful.
3772          */
3773         protected function showConflict() {
3774                 $out = $this->context->getOutput();
3775                 // Avoid PHP 7.1 warning of passing $this by reference
3776                 $editPage = $this;
3777                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3778                         $this->incrementConflictStats();
3779
3780                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3781                 }
3782         }
3783
3784         protected function incrementConflictStats() {
3785                 $this->getEditConflictHelper()->incrementConflictStats();
3786         }
3787
3788         /**
3789          * @return string
3790          */
3791         public function getCancelLink() {
3792                 $cancelParams = [];
3793                 if ( !$this->isConflict && $this->oldid > 0 ) {
3794                         $cancelParams['oldid'] = $this->oldid;
3795                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3796                         $cancelParams['redirect'] = 'no';
3797                 }
3798
3799                 return new OOUI\ButtonWidget( [
3800                         'id' => 'mw-editform-cancel',
3801                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3802                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3803                         'framed' => false,
3804                         'infusable' => true,
3805                         'flags' => 'destructive',
3806                 ] );
3807         }
3808
3809         /**
3810          * Returns the URL to use in the form's action attribute.
3811          * This is used by EditPage subclasses when simply customizing the action
3812          * variable in the constructor is not enough. This can be used when the
3813          * EditPage lives inside of a Special page rather than a custom page action.
3814          *
3815          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3816          * @return string
3817          */
3818         protected function getActionURL( Title $title ) {
3819                 return $title->getLocalURL( [ 'action' => $this->action ] );
3820         }
3821
3822         /**
3823          * Check if a page was deleted while the user was editing it, before submit.
3824          * Note that we rely on the logging table, which hasn't been always there,
3825          * but that doesn't matter, because this only applies to brand new
3826          * deletes.
3827          * @return bool
3828          */
3829         protected function wasDeletedSinceLastEdit() {
3830                 if ( $this->deletedSinceEdit !== null ) {
3831                         return $this->deletedSinceEdit;
3832                 }
3833
3834                 $this->deletedSinceEdit = false;
3835
3836                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3837                         $this->lastDelete = $this->getLastDelete();
3838                         if ( $this->lastDelete ) {
3839                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3840                                 if ( $deleteTime > $this->starttime ) {
3841                                         $this->deletedSinceEdit = true;
3842                                 }
3843                         }
3844                 }
3845
3846                 return $this->deletedSinceEdit;
3847         }
3848
3849         /**
3850          * Get the last log record of this page being deleted, if ever.  This is
3851          * used to detect whether a delete occurred during editing.
3852          * @return bool|stdClass
3853          */
3854         protected function getLastDelete() {
3855                 $dbr = wfGetDB( DB_REPLICA );
3856                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3857                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3858                 $data = $dbr->selectRow(
3859                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3860                         [
3861                                 'log_type',
3862                                 'log_action',
3863                                 'log_timestamp',
3864                                 'log_namespace',
3865                                 'log_title',
3866                                 'log_params',
3867                                 'log_deleted',
3868                                 'user_name'
3869                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3870                         [
3871                                 'log_namespace' => $this->mTitle->getNamespace(),
3872                                 'log_title' => $this->mTitle->getDBkey(),
3873                                 'log_type' => 'delete',
3874                                 'log_action' => 'delete',
3875                         ],
3876                         __METHOD__,
3877                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3878                         [
3879                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3880                         ] + $commentQuery['joins'] + $actorQuery['joins']
3881                 );
3882                 // Quick paranoid permission checks...
3883                 if ( is_object( $data ) ) {
3884                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3885                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3886                         }
3887
3888                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3889                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3890                                 $data->log_comment_data = null;
3891                         }
3892                 }
3893
3894                 return $data;
3895         }
3896
3897         /**
3898          * Get the rendered text for previewing.
3899          * @throws MWException
3900          * @return string
3901          */
3902         public function getPreviewText() {
3903                 $out = $this->context->getOutput();
3904                 $config = $this->context->getConfig();
3905
3906                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3907                         // Could be an offsite preview attempt. This is very unsafe if
3908                         // HTML is enabled, as it could be an attack.
3909                         $parsedNote = '';
3910                         if ( $this->textbox1 !== '' ) {
3911                                 // Do not put big scary notice, if previewing the empty
3912                                 // string, which happens when you initially edit
3913                                 // a category page, due to automatic preview-on-open.
3914                                 $parsedNote = Html::rawElement( 'div', [ 'class' => 'previewnote' ],
3915                                         $out->parseAsInterface(
3916                                                 $this->context->msg( 'session_fail_preview_html' )->plain()
3917                                         ) );
3918                         }
3919                         $this->incrementEditFailureStats( 'session_loss' );
3920                         return $parsedNote;
3921                 }
3922
3923                 $note = '';
3924
3925                 try {
3926                         $content = $this->toEditContent( $this->textbox1 );
3927
3928                         $previewHTML = '';
3929                         if ( !Hooks::run(
3930                                 'AlternateEditPreview',
3931                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3932                         ) {
3933                                 return $previewHTML;
3934                         }
3935
3936                         # provide a anchor link to the editform
3937                         $continueEditing = '<span class="mw-continue-editing">' .
3938                                 '[[#' . self::EDITFORM_ID . '|' .
3939                                 $this->context->getLanguage()->getArrow() . ' ' .
3940                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3941                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3942                                 if ( $this->mTokenOkExceptSuffix ) {
3943                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3944                                         $this->incrementEditFailureStats( 'bad_token' );
3945                                 } else {
3946                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3947                                         $this->incrementEditFailureStats( 'session_loss' );
3948                                 }
3949                         } elseif ( $this->incompleteForm ) {
3950                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3951                                 if ( $this->mTriedSave ) {
3952                                         $this->incrementEditFailureStats( 'incomplete_form' );
3953                                 }
3954                         } else {
3955                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3956                         }
3957
3958                         # don't parse non-wikitext pages, show message about preview
3959                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3960                                 if ( $this->mTitle->isUserConfigPage() ) {
3961                                         $level = 'user';
3962                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3963                                         $level = 'site';
3964                                 } else {
3965                                         $level = false;
3966                                 }
3967
3968                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3969                                         $format = 'css';
3970                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3971                                                 $format = false;
3972                                         }
3973                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3974                                         $format = 'json';
3975                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3976                                                 $format = false;
3977                                         }
3978                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3979                                         $format = 'js';
3980                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3981                                                 $format = false;
3982                                         }
3983                                 } else {
3984                                         $format = false;
3985                                 }
3986
3987                                 # Used messages to make sure grep find them:
3988                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
3989                                 #   sitecsspreview, sitejsonpreview, sitejspreview
3990                                 if ( $level && $format ) {
3991                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3992                                                 $this->context->msg( "{$level}{$format}preview" )->plain() .
3993                                                 ' ' . $continueEditing . "</div>";
3994                                 }
3995                         }
3996
3997                         # If we're adding a comment, we need to show the
3998                         # summary as the headline
3999                         if ( $this->section === "new" && $this->summary !== "" ) {
4000                                 $content = $content->addSectionHeader( $this->summary );
4001                         }
4002
4003                         $hook_args = [ $this, &$content ];
4004                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
4005
4006                         $parserResult = $this->doPreviewParse( $content );
4007                         $parserOutput = $parserResult['parserOutput'];
4008                         $previewHTML = $parserResult['html'];
4009                         $this->mParserOutput = $parserOutput;
4010                         $out->addParserOutputMetadata( $parserOutput );
4011                         if ( $out->userCanPreview() ) {
4012                                 $out->addContentOverride( $this->getTitle(), $content );
4013                         }
4014
4015                         if ( count( $parserOutput->getWarnings() ) ) {
4016                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
4017                         }
4018
4019                 } catch ( MWContentSerializationException $ex ) {
4020                         $m = $this->context->msg(
4021                                 'content-failed-to-parse',
4022                                 $this->contentModel,
4023                                 $this->contentFormat,
4024                                 $ex->getMessage()
4025                         );
4026                         $note .= "\n\n" . $m->plain(); # gets parsed down below
4027                         $previewHTML = '';
4028                 }
4029
4030                 if ( $this->isConflict ) {
4031                         $conflict = Html::rawElement(
4032                                 'h2', [ 'id' => 'mw-previewconflict' ],
4033                                 $this->context->msg( 'previewconflict' )->escaped()
4034                         );
4035                 } else {
4036                         $conflict = '<hr />';
4037                 }
4038
4039                 $previewhead = Html::rawElement(
4040                         'div', [ 'class' => 'previewnote' ],
4041                         Html::rawElement(
4042                                 'h2', [ 'id' => 'mw-previewheader' ],
4043                                 $this->context->msg( 'preview' )->escaped()
4044                         ) .
4045                         $out->parseAsInterface( $note ) . $conflict
4046                 );
4047
4048                 $pageViewLang = $this->mTitle->getPageViewLanguage();
4049                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
4050                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
4051                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
4052
4053                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
4054         }
4055
4056         private function incrementEditFailureStats( $failureType ) {
4057                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
4058                 $stats->increment( 'edit.failures.' . $failureType );
4059         }
4060
4061         /**
4062          * Get parser options for a preview
4063          * @return ParserOptions
4064          */
4065         protected function getPreviewParserOptions() {
4066                 $parserOptions = $this->page->makeParserOptions( $this->context );
4067                 $parserOptions->setIsPreview( true );
4068                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
4069                 $parserOptions->enableLimitReport();
4070
4071                 // XXX: we could call $parserOptions->setCurrentRevisionCallback here to force the
4072                 // current revision to be null during PST, until setupFakeRevision is called on
4073                 // the ParserOptions. Currently, we rely on Parser::getRevisionObject() to ignore
4074                 // existing revisions in preview mode.
4075
4076                 return $parserOptions;
4077         }
4078
4079         /**
4080          * Parse the page for a preview. Subclasses may override this class, in order
4081          * to parse with different options, or to otherwise modify the preview HTML.
4082          *
4083          * @param Content $content The page content
4084          * @return array with keys:
4085          *   - parserOutput: The ParserOutput object
4086          *   - html: The HTML to be displayed
4087          */
4088         protected function doPreviewParse( Content $content ) {
4089                 $user = $this->context->getUser();
4090                 $parserOptions = $this->getPreviewParserOptions();
4091
4092                 // NOTE: preSaveTransform doesn't have a fake revision to operate on.
4093                 // Parser::getRevisionObject() will return null in preview mode,
4094                 // causing the context user to be used for {{subst:REVISIONUSER}}.
4095                 // XXX: Alternatively, we could also call setupFakeRevision() a second time:
4096                 // once before PST with $content, and then after PST with $pstContent.
4097                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4098                 $scopedCallback = $parserOptions->setupFakeRevision( $this->mTitle, $pstContent, $user );
4099                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4100                 ScopedCallback::consume( $scopedCallback );
4101                 return [
4102                         'parserOutput' => $parserOutput,
4103                         'html' => $parserOutput->getText( [
4104                                 'enableSectionEditLinks' => false
4105                         ] )
4106                 ];
4107         }
4108
4109         /**
4110          * @return array
4111          */
4112         public function getTemplates() {
4113                 if ( $this->preview || $this->section != '' ) {
4114                         $templates = [];
4115                         if ( !isset( $this->mParserOutput ) ) {
4116                                 return $templates;
4117                         }
4118                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4119                                 foreach ( array_keys( $template ) as $dbk ) {
4120                                         $templates[] = Title::makeTitle( $ns, $dbk );
4121                                 }
4122                         }
4123                         return $templates;
4124                 } else {
4125                         return $this->mTitle->getTemplateLinksFrom();
4126                 }
4127         }
4128
4129         /**
4130          * Allow extensions to provide a toolbar.
4131          *
4132          * @return string|null
4133          */
4134         public static function getEditToolbar() {
4135                 $startingToolbar = '<div id="toolbar"></div>';
4136                 $toolbar = $startingToolbar;
4137
4138                 if ( !Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4139                         return null;
4140                 };
4141                 // Don't add a pointless `<div>` to the page unless a hook caller populated it
4142                 return ( $toolbar === $startingToolbar ) ? null : $toolbar;
4143         }
4144
4145         /**
4146          * Return an array of checkbox definitions.
4147          *
4148          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4149          *
4150          * Array values are associative arrays with the following keys:
4151          *  - 'label-message' (required): message for label text
4152          *  - 'id' (required): 'id' attribute for the `<input>`
4153          *  - 'default' (required): default checkedness (true or false)
4154          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4155          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4156          *    from messages like 'tooltip-foo', 'accesskey-foo'
4157          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4158          *  - 'legacy-name' (optional): short name for backwards-compatibility
4159          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4160          *   where bool indicates the checked status of the checkbox
4161          * @return array
4162          */
4163         public function getCheckboxesDefinition( $checked ) {
4164                 $checkboxes = [];
4165
4166                 $user = $this->context->getUser();
4167                 // don't show the minor edit checkbox if it's a new page or section
4168                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4169                         $checkboxes['wpMinoredit'] = [
4170                                 'id' => 'wpMinoredit',
4171                                 'label-message' => 'minoredit',
4172                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4173                                 'tooltip' => 'minoredit',
4174                                 'label-id' => 'mw-editpage-minoredit',
4175                                 'legacy-name' => 'minor',
4176                                 'default' => $checked['minor'],
4177                         ];
4178                 }
4179
4180                 if ( $user->isLoggedIn() ) {
4181                         $checkboxes['wpWatchthis'] = [
4182                                 'id' => 'wpWatchthis',
4183                                 'label-message' => 'watchthis',
4184                                 // Uses messages: tooltip-watch, accesskey-watch
4185                                 'tooltip' => 'watch',
4186                                 'label-id' => 'mw-editpage-watch',
4187                                 'legacy-name' => 'watch',
4188                                 'default' => $checked['watch'],
4189                         ];
4190                 }
4191
4192                 $editPage = $this;
4193                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4194
4195                 return $checkboxes;
4196         }
4197
4198         /**
4199          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4200          * any other added by extensions.
4201          *
4202          * @param int &$tabindex Current tabindex
4203          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4204          *                 status of the checkbox
4205          *
4206          * @return array Associative array of string keys to OOUI\FieldLayout instances
4207          */
4208         public function getCheckboxesWidget( &$tabindex, $checked ) {
4209                 $checkboxes = [];
4210                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4211
4212                 foreach ( $checkboxesDef as $name => $options ) {
4213                         $legacyName = $options['legacy-name'] ?? $name;
4214
4215                         $title = null;
4216                         $accesskey = null;
4217                         if ( isset( $options['tooltip'] ) ) {
4218                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4219                                 $title = Linker::titleAttrib( $options['tooltip'] );
4220                         }
4221                         if ( isset( $options['title-message'] ) ) {
4222                                 $title = $this->context->msg( $options['title-message'] )->text();
4223                         }
4224
4225                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4226                                 new OOUI\CheckboxInputWidget( [
4227                                         'tabIndex' => ++$tabindex,
4228                                         'accessKey' => $accesskey,
4229                                         'id' => $options['id'] . 'Widget',
4230                                         'inputId' => $options['id'],
4231                                         'name' => $name,
4232                                         'selected' => $options['default'],
4233                                         'infusable' => true,
4234                                 ] ),
4235                                 [
4236                                         'align' => 'inline',
4237                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4238                                         'title' => $title,
4239                                         'id' => $options['label-id'] ?? null,
4240                                 ]
4241                         );
4242                 }
4243
4244                 return $checkboxes;
4245         }
4246
4247         /**
4248          * Get the message key of the label for the button to save the page
4249          *
4250          * @since 1.30
4251          * @return string
4252          */
4253         protected function getSubmitButtonLabel() {
4254                 $labelAsPublish =
4255                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4256
4257                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4258                 $newPage = !$this->mTitle->exists();
4259
4260                 if ( $labelAsPublish ) {
4261                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4262                 } else {
4263                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4264                 }
4265
4266                 return $buttonLabelKey;
4267         }
4268
4269         /**
4270          * Returns an array of html code of the following buttons:
4271          * save, diff and preview
4272          *
4273          * @param int &$tabindex Current tabindex
4274          *
4275          * @return array
4276          */
4277         public function getEditButtons( &$tabindex ) {
4278                 $buttons = [];
4279
4280                 $labelAsPublish =
4281                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4282
4283                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4284                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4285
4286                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4287                         'name' => 'wpSave',
4288                         'tabIndex' => ++$tabindex,
4289                         'id' => 'wpSaveWidget',
4290                         'inputId' => 'wpSave',
4291                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4292                         'useInputTag' => true,
4293                         'flags' => [ 'progressive', 'primary' ],
4294                         'label' => $buttonLabel,
4295                         'infusable' => true,
4296                         'type' => 'submit',
4297                         // Messages used: tooltip-save, tooltip-publish
4298                         'title' => Linker::titleAttrib( $buttonTooltip ),
4299                         // Messages used: accesskey-save, accesskey-publish
4300                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4301                 ] );
4302
4303                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4304                         'name' => 'wpPreview',
4305                         'tabIndex' => ++$tabindex,
4306                         'id' => 'wpPreviewWidget',
4307                         'inputId' => 'wpPreview',
4308                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4309                         'useInputTag' => true,
4310                         'label' => $this->context->msg( 'showpreview' )->text(),
4311                         'infusable' => true,
4312                         'type' => 'submit',
4313                         // Message used: tooltip-preview
4314                         'title' => Linker::titleAttrib( 'preview' ),
4315                         // Message used: accesskey-preview
4316                         'accessKey' => Linker::accesskey( 'preview' ),
4317                 ] );
4318
4319                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4320                         'name' => 'wpDiff',
4321                         'tabIndex' => ++$tabindex,
4322                         'id' => 'wpDiffWidget',
4323                         'inputId' => 'wpDiff',
4324                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4325                         'useInputTag' => true,
4326                         'label' => $this->context->msg( 'showdiff' )->text(),
4327                         'infusable' => true,
4328                         'type' => 'submit',
4329                         // Message used: tooltip-diff
4330                         'title' => Linker::titleAttrib( 'diff' ),
4331                         // Message used: accesskey-diff
4332                         'accessKey' => Linker::accesskey( 'diff' ),
4333                 ] );
4334
4335                 // Avoid PHP 7.1 warning of passing $this by reference
4336                 $editPage = $this;
4337                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4338
4339                 return $buttons;
4340         }
4341
4342         /**
4343          * Creates a basic error page which informs the user that
4344          * they have attempted to edit a nonexistent section.
4345          */
4346         public function noSuchSectionPage() {
4347                 $out = $this->context->getOutput();
4348                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4349
4350                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4351
4352                 // Avoid PHP 7.1 warning of passing $this by reference
4353                 $editPage = $this;
4354                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4355                 $out->addHTML( $res );
4356
4357                 $out->returnToMain( false, $this->mTitle );
4358         }
4359
4360         /**
4361          * Show "your edit contains spam" page with your diff and text
4362          *
4363          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4364          */
4365         public function spamPageWithContent( $match = false ) {
4366                 $this->textbox2 = $this->textbox1;
4367
4368                 if ( is_array( $match ) ) {
4369                         $match = $this->context->getLanguage()->listToText( $match );
4370                 }
4371                 $out = $this->context->getOutput();
4372                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4373
4374                 $out->addHTML( '<div id="spamprotected">' );
4375                 $out->addWikiMsg( 'spamprotectiontext' );
4376                 if ( $match ) {
4377                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4378                 }
4379                 $out->addHTML( '</div>' );
4380
4381                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4382                 $this->showDiff();
4383
4384                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4385                 $this->showTextbox2();
4386
4387                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4388         }
4389
4390         /**
4391          * @since 1.29
4392          */
4393         protected function addEditNotices() {
4394                 $out = $this->context->getOutput();
4395                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4396                 if ( count( $editNotices ) ) {
4397                         $out->addHTML( implode( "\n", $editNotices ) );
4398                 } else {
4399                         $msg = $this->context->msg( 'editnotice-notext' );
4400                         if ( !$msg->isDisabled() ) {
4401                                 $out->addHTML(
4402                                         '<div class="mw-editnotice-notext">'
4403                                         . $msg->parseAsBlock()
4404                                         . '</div>'
4405                                 );
4406                         }
4407                 }
4408         }
4409
4410         /**
4411          * @since 1.29
4412          */
4413         protected function addTalkPageText() {
4414                 if ( $this->mTitle->isTalkPage() ) {
4415                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4416                 }
4417         }
4418
4419         /**
4420          * @since 1.29
4421          */
4422         protected function addLongPageWarningHeader() {
4423                 if ( $this->contentLength === false ) {
4424                         $this->contentLength = strlen( $this->textbox1 );
4425                 }
4426
4427                 $out = $this->context->getOutput();
4428                 $lang = $this->context->getLanguage();
4429                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4430                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4431                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4432                                 [
4433                                         'longpageerror',
4434                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4435                                         $lang->formatNum( $maxArticleSize )
4436                                 ]
4437                         );
4438                 } elseif ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4439                         $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4440                                 [
4441                                         'longpage-hint',
4442                                         $lang->formatSize( strlen( $this->textbox1 ) ),
4443                                         strlen( $this->textbox1 )
4444                                 ]
4445                         );
4446                 }
4447         }
4448
4449         /**
4450          * @since 1.29
4451          */
4452         protected function addPageProtectionWarningHeaders() {
4453                 $out = $this->context->getOutput();
4454                 if ( $this->mTitle->isProtected( 'edit' ) &&
4455                         MediaWikiServices::getInstance()->getNamespaceInfo()->getRestrictionLevels(
4456                                 $this->mTitle->getNamespace()
4457                         ) !== [ '' ]
4458                 ) {
4459                         # Is the title semi-protected?
4460                         if ( $this->mTitle->isSemiProtected() ) {
4461                                 $noticeMsg = 'semiprotectedpagewarning';
4462                         } else {
4463                                 # Then it must be protected based on static groups (regular)
4464                                 $noticeMsg = 'protectedpagewarning';
4465                         }
4466                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4467                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4468                 }
4469                 if ( $this->mTitle->isCascadeProtected() ) {
4470                         # Is this page under cascading protection from some source pages?
4471                         /** @var Title[] $cascadeSources */
4472                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4473                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4474                         $cascadeSourcesCount = count( $cascadeSources );
4475                         if ( $cascadeSourcesCount > 0 ) {
4476                                 # Explain, and list the titles responsible
4477                                 foreach ( $cascadeSources as $page ) {
4478                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4479                                 }
4480                         }
4481                         $notice .= '</div>';
4482                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4483                 }
4484                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4485                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4486                                 [ 'lim' => 1,
4487                                         'showIfEmpty' => false,
4488                                         'msgKey' => [ 'titleprotectedwarning' ],
4489                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4490                 }
4491         }
4492
4493         /**
4494          * @param OutputPage $out
4495          * @since 1.29
4496          */
4497         protected function addExplainConflictHeader( OutputPage $out ) {
4498                 $out->addHTML(
4499                         $this->getEditConflictHelper()->getExplainHeader()
4500                 );
4501         }
4502
4503         /**
4504          * @param string $name
4505          * @param mixed[] $customAttribs
4506          * @param User $user
4507          * @return mixed[]
4508          * @since 1.29
4509          */
4510         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4511                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4512                         $name, $customAttribs, $user, $this->mTitle
4513                 );
4514         }
4515
4516         /**
4517          * @param string $wikitext
4518          * @return string
4519          * @since 1.29
4520          */
4521         protected function addNewLineAtEnd( $wikitext ) {
4522                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4523         }
4524
4525         /**
4526          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4527          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4528          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4529          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4530          * spread the new style links more efficiently.
4531          *
4532          * @param string $text
4533          * @return string
4534          */
4535         private function guessSectionName( $text ) {
4536                 // Detect Microsoft browsers
4537                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4538                 $parser = MediaWikiServices::getInstance()->getParser();
4539                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4540                         // ...and redirect them to legacy encoding, if available
4541                         return $parser->guessLegacySectionNameFromWikiText( $text );
4542                 }
4543                 // Meanwhile, real browsers get real anchors
4544                 $name = $parser->guessSectionNameFromWikiText( $text );
4545                 // With one little caveat: per T216029, fragments in HTTP redirects need to be urlencoded,
4546                 // otherwise Chrome double-escapes the rest of the URL.
4547                 return '#' . urlencode( mb_substr( $name, 1 ) );
4548         }
4549
4550         /**
4551          * Set a factory function to create an EditConflictHelper
4552          *
4553          * @param callable $factory Factory function
4554          * @since 1.31
4555          */
4556         public function setEditConflictHelperFactory( callable $factory ) {
4557                 $this->editConflictHelperFactory = $factory;
4558                 $this->editConflictHelper = null;
4559         }
4560
4561         /**
4562          * @return TextConflictHelper
4563          */
4564         private function getEditConflictHelper() {
4565                 if ( !$this->editConflictHelper ) {
4566                         $this->editConflictHelper = call_user_func(
4567                                 $this->editConflictHelperFactory,
4568                                 $this->getSubmitButtonLabel()
4569                         );
4570                 }
4571
4572                 return $this->editConflictHelper;
4573         }
4574
4575         /**
4576          * @param string $submitButtonLabel
4577          * @return TextConflictHelper
4578          */
4579         private function newTextConflictHelper( $submitButtonLabel ) {
4580                 return new TextConflictHelper(
4581                         $this->getTitle(),
4582                         $this->getContext()->getOutput(),
4583                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4584                         $submitButtonLabel
4585                 );
4586         }
4587 }