includes/specials/SpecialUpload.php

   1 <?php
   2 /**
   3  * Implements Special:Upload
   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  * @ingroup SpecialPage
  22  * @ingroup Upload
  23  */
  24
  25 use MediaWiki\MediaWikiServices;
  26
  27 /**
  28  * Form for handling uploads and special page.
  29  *
  30  * @ingroup SpecialPage
  31  * @ingroup Upload
  32  */
  33 class SpecialUpload extends SpecialPage {
  34         /**
  35          * Get data POSTed through the form and assign them to the object
  36          * @param WebRequest $request Data posted.
  37          */
  38         public function __construct( $request = null ) {
  39                 parent::__construct( 'Upload', 'upload' );
  40         }
  41
  42         public function doesWrites() {
  43                 return true;
  44         }
  45
  46         /** Misc variables **/
  47
  48         /** @var WebRequest|FauxRequest The request this form is supposed to handle */
  49         public $mRequest;
  50         public $mSourceType;
  51
  52         /** @var UploadBase */
  53         public $mUpload;
  54
  55         /** @var LocalFile */
  56         public $mLocalFile;
  57         public $mUploadClicked;
  58
  59         /** User input variables from the "description" section **/
  60
  61         /** @var string The requested target file name */
  62         public $mDesiredDestName;
  63         public $mComment;
  64         public $mLicense;
  65
  66         /** User input variables from the root section **/
  67
  68         public $mIgnoreWarning;
  69         public $mWatchthis;
  70         public $mCopyrightStatus;
  71         public $mCopyrightSource;
  72
  73         /** Hidden variables **/
  74
  75         public $mDestWarningAck;
  76
  77         /** @var bool The user followed an "overwrite this file" link */
  78         public $mForReUpload;
  79
  80         /** @var bool The user clicked "Cancel and return to upload form" button */
  81         public $mCancelUpload;
  82         public $mTokenOk;
  83
  84         /** @var bool Subclasses can use this to determine whether a file was uploaded */
  85         public $mUploadSuccessful = false;
  86
  87         /** Text injection points for hooks not using HTMLForm **/
  88         public $uploadFormTextTop;
  89         public $uploadFormTextAfterSummary;
  90
  91         /**
  92          * Initialize instance variables from request and create an Upload handler
  93          */
  94         protected function loadRequest() {
  95                 $this->mRequest = $request = $this->getRequest();
  96                 $this->mSourceType = $request->getVal( 'wpSourceType', 'file' );
  97                 $this->mUpload = UploadBase::createFromRequest( $request );
  98                 $this->mUploadClicked = $request->wasPosted()
  99                         && ( $request->getCheck( 'wpUpload' )
 100                                 || $request->getCheck( 'wpUploadIgnoreWarning' ) );
 101
 102                 // Guess the desired name from the filename if not provided
 103                 $this->mDesiredDestName = $request->getText( 'wpDestFile' );
 104                 if ( !$this->mDesiredDestName && $request->getFileName( 'wpUploadFile' ) !== null ) {
 105                         $this->mDesiredDestName = $request->getFileName( 'wpUploadFile' );
 106                 }
 107                 $this->mLicense = $request->getText( 'wpLicense' );
 108
 109                 $this->mDestWarningAck = $request->getText( 'wpDestFileWarningAck' );
 110                 $this->mIgnoreWarning = $request->getCheck( 'wpIgnoreWarning' )
 111                         || $request->getCheck( 'wpUploadIgnoreWarning' );
 112                 $this->mWatchthis = $request->getBool( 'wpWatchthis' ) && $this->getUser()->isLoggedIn();
 113                 $this->mCopyrightStatus = $request->getText( 'wpUploadCopyStatus' );
 114                 $this->mCopyrightSource = $request->getText( 'wpUploadSource' );
 115
 116                 $this->mForReUpload = $request->getBool( 'wpForReUpload' ); // updating a file
 117
 118                 $commentDefault = '';
 119                 $commentMsg = wfMessage( 'upload-default-description' )->inContentLanguage();
 120                 if ( !$this->mForReUpload && !$commentMsg->isDisabled() ) {
 121                         $commentDefault = $commentMsg->plain();
 122                 }
 123                 $this->mComment = $request->getText( 'wpUploadDescription', $commentDefault );
 124
 125                 $this->mCancelUpload = $request->getCheck( 'wpCancelUpload' )
 126                         || $request->getCheck( 'wpReUpload' ); // b/w compat
 127
 128                 // If it was posted check for the token (no remote POST'ing with user credentials)
 129                 $token = $request->getVal( 'wpEditToken' );
 130                 $this->mTokenOk = $this->getUser()->matchEditToken( $token );
 131
 132                 $this->uploadFormTextTop = '';
 133                 $this->uploadFormTextAfterSummary = '';
 134         }
 135
 136         /**
 137          * This page can be shown if uploading is enabled.
 138          * Handle permission checking elsewhere in order to be able to show
 139          * custom error messages.
 140          *
 141          * @param User $user
 142          * @return bool
 143          */
 144         public function userCanExecute( User $user ) {
 145                 return UploadBase::isEnabled() && parent::userCanExecute( $user );
 146         }
 147
 148         /**
 149          * Special page entry point
 150          * @param string $par
 151          * @throws ErrorPageError
 152          * @throws Exception
 153          * @throws FatalError
 154          * @throws MWException
 155          * @throws PermissionsError
 156          * @throws ReadOnlyError
 157          * @throws UserBlockedError
 158          */
 159         public function execute( $par ) {
 160                 $this->useTransactionalTimeLimit();
 161
 162                 $this->setHeaders();
 163                 $this->outputHeader();
 164
 165                 # Check uploading enabled
 166                 if ( !UploadBase::isEnabled() ) {
 167                         throw new ErrorPageError( 'uploaddisabled', 'uploaddisabledtext' );
 168                 }
 169
 170                 $this->addHelpLink( 'Help:Managing files' );
 171
 172                 # Check permissions
 173                 $user = $this->getUser();
 174                 $permissionRequired = UploadBase::isAllowed( $user );
 175                 if ( $permissionRequired !== true ) {
 176                         throw new PermissionsError( $permissionRequired );
 177                 }
 178
 179                 # Check blocks
 180                 if ( $user->isBlocked() ) {
 181                         throw new UserBlockedError( $user->getBlock() );
 182                 }
 183
 184                 // Global blocks
 185                 if ( $user->isBlockedGlobally() ) {
 186                         throw new UserBlockedError( $user->getGlobalBlock() );
 187                 }
 188
 189                 # Check whether we actually want to allow changing stuff
 190                 $this->checkReadOnly();
 191
 192                 $this->loadRequest();
 193
 194                 # Unsave the temporary file in case this was a cancelled upload
 195                 if ( $this->mCancelUpload ) {
 196                         if ( !$this->unsaveUploadedFile() ) {
 197                                 # Something went wrong, so unsaveUploadedFile showed a warning
 198                                 return;
 199                         }
 200                 }
 201
 202                 # Process upload or show a form
 203                 if (
 204                         $this->mTokenOk && !$this->mCancelUpload &&
 205                         ( $this->mUpload && $this->mUploadClicked )
 206                 ) {
 207                         $this->processUpload();
 208                 } else {
 209                         # Backwards compatibility hook
 210                         // Avoid PHP 7.1 warning of passing $this by reference
 211                         $upload = $this;
 212                         if ( !Hooks::run( 'UploadForm:initial', [ &$upload ] ) ) {
 213                                 wfDebug( "Hook 'UploadForm:initial' broke output of the upload form\n" );
 214
 215                                 return;
 216                         }
 217                         $this->showUploadForm( $this->getUploadForm() );
 218                 }
 219
 220                 # Cleanup
 221                 if ( $this->mUpload ) {
 222                         $this->mUpload->cleanupTempFile();
 223                 }
 224         }
 225
 226         /**
 227          * Show the main upload form
 228          *
 229          * @param HTMLForm|string $form An HTMLForm instance or HTML string to show
 230          */
 231         protected function showUploadForm( $form ) {
 232                 # Add links if file was previously deleted
 233                 if ( $this->mDesiredDestName ) {
 234                         $this->showViewDeletedLinks();
 235                 }
 236
 237                 if ( $form instanceof HTMLForm ) {
 238                         $form->show();
 239                 } else {
 240                         $this->getOutput()->addHTML( $form );
 241                 }
 242         }
 243
 244         /**
 245          * Get an UploadForm instance with title and text properly set.
 246          *
 247          * @param string $message HTML string to add to the form
 248          * @param string $sessionKey Session key in case this is a stashed upload
 249          * @param bool $hideIgnoreWarning Whether to hide "ignore warning" check box
 250          * @return UploadForm
 251          */
 252         protected function getUploadForm( $message = '', $sessionKey = '', $hideIgnoreWarning = false ) {
 253                 # Initialize form
 254                 $context = new DerivativeContext( $this->getContext() );
 255                 $context->setTitle( $this->getPageTitle() ); // Remove subpage
 256                 $form = new UploadForm( [
 257                         'watch' => $this->getWatchCheck(),
 258                         'forreupload' => $this->mForReUpload,
 259                         'sessionkey' => $sessionKey,
 260                         'hideignorewarning' => $hideIgnoreWarning,
 261                         'destwarningack' => (bool)$this->mDestWarningAck,
 262
 263                         'description' => $this->mComment,
 264                         'texttop' => $this->uploadFormTextTop,
 265                         'textaftersummary' => $this->uploadFormTextAfterSummary,
 266                         'destfile' => $this->mDesiredDestName,
 267                 ], $context, $this->getLinkRenderer() );
 268
 269                 # Check the token, but only if necessary
 270                 if (
 271                         !$this->mTokenOk && !$this->mCancelUpload &&
 272                         ( $this->mUpload && $this->mUploadClicked )
 273                 ) {
 274                         $form->addPreText( $this->msg( 'session_fail_preview' )->parse() );
 275                 }
 276
 277                 # Give a notice if the user is uploading a file that has been deleted or moved
 278                 # Note that this is independent from the message 'filewasdeleted'
 279                 $desiredTitleObj = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 280                 $delNotice = ''; // empty by default
 281                 if ( $desiredTitleObj instanceof Title && !$desiredTitleObj->exists() ) {
 282                         $dbr = wfGetDB( DB_REPLICA );
 283
 284                         LogEventsList::showLogExtract( $delNotice, [ 'delete', 'move' ],
 285                                 $desiredTitleObj,
 286                                 '', [ 'lim' => 10,
 287                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
 288                                         'showIfEmpty' => false,
 289                                         'msgKey' => [ 'upload-recreate-warning' ] ]
 290                         );
 291                 }
 292                 $form->addPreText( $delNotice );
 293
 294                 # Add text to form
 295                 $form->addPreText( '<div id="uploadtext">' .
 296                         $this->msg( 'uploadtext', [ $this->mDesiredDestName ] )->parseAsBlock() .
 297                         '</div>' );
 298                 # Add upload error message
 299                 $form->addPreText( $message );
 300
 301                 # Add footer to form
 302                 $uploadFooter = $this->msg( 'uploadfooter' );
 303                 if ( !$uploadFooter->isDisabled() ) {
 304                         $form->addPostText( '<div id="mw-upload-footer-message">'
 305                                 . $uploadFooter->parseAsBlock() . "</div>\n" );
 306                 }
 307
 308                 return $form;
 309         }
 310
 311         /**
 312          * Shows the "view X deleted revivions link""
 313          */
 314         protected function showViewDeletedLinks() {
 315                 $title = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 316                 $user = $this->getUser();
 317                 // Show a subtitle link to deleted revisions (to sysops et al only)
 318                 if ( $title instanceof Title ) {
 319                         $count = $title->isDeleted();
 320                         if ( $count > 0 && $user->isAllowed( 'deletedhistory' ) ) {
 321                                 $restorelink = $this->getLinkRenderer()->makeKnownLink(
 322                                         SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedText() ),
 323                                         $this->msg( 'restorelink' )->numParams( $count )->text()
 324                                 );
 325                                 $link = $this->msg( $user->isAllowed( 'delete' ) ? 'thisisdeleted' : 'viewdeleted' )
 326                                         ->rawParams( $restorelink )->parseAsBlock();
 327                                 $this->getOutput()->addHTML( "<div id=\"contentSub2\">{$link}</div>" );
 328                         }
 329                 }
 330         }
 331
 332         /**
 333          * Stashes the upload and shows the main upload form.
 334          *
 335          * Note: only errors that can be handled by changing the name or
 336          * description should be redirected here. It should be assumed that the
 337          * file itself is sane and has passed UploadBase::verifyFile. This
 338          * essentially means that UploadBase::VERIFICATION_ERROR and
 339          * UploadBase::EMPTY_FILE should not be passed here.
 340          *
 341          * @param string $message HTML message to be passed to mainUploadForm
 342          */
 343         protected function showRecoverableUploadError( $message ) {
 344                 $stashStatus = $this->mUpload->tryStashFile( $this->getUser() );
 345                 if ( $stashStatus->isGood() ) {
 346                         $sessionKey = $stashStatus->getValue()->getFileKey();
 347                 } else {
 348                         $sessionKey = null;
 349                         // TODO Add a warning message about the failure to stash here?
 350                 }
 351                 $message = '<h2>' . $this->msg( 'uploaderror' )->escaped() . "</h2>\n" .
 352                         '<div class="error">' . $message . "</div>\n";
 353
 354                 $form = $this->getUploadForm( $message, $sessionKey );
 355                 $form->setSubmitText( $this->msg( 'upload-tryagain' )->escaped() );
 356                 $this->showUploadForm( $form );
 357         }
 358
 359         /**
 360          * Stashes the upload, shows the main form, but adds a "continue anyway button".
 361          * Also checks whether there are actually warnings to display.
 362          *
 363          * @param array $warnings
 364          * @return bool True if warnings were displayed, false if there are no
 365          *   warnings and it should continue processing
 366          */
 367         protected function showUploadWarning( $warnings ) {
 368                 # If there are no warnings, or warnings we can ignore, return early.
 369                 # mDestWarningAck is set when some javascript has shown the warning
 370                 # to the user. mForReUpload is set when the user clicks the "upload a
 371                 # new version" link.
 372                 if ( !$warnings || ( count( $warnings ) == 1
 373                         && isset( $warnings['exists'] )
 374                         && ( $this->mDestWarningAck || $this->mForReUpload ) )
 375                 ) {
 376                         return false;
 377                 }
 378
 379                 $stashStatus = $this->mUpload->tryStashFile( $this->getUser() );
 380                 if ( $stashStatus->isGood() ) {
 381                         $sessionKey = $stashStatus->getValue()->getFileKey();
 382                 } else {
 383                         $sessionKey = null;
 384                         // TODO Add a warning message about the failure to stash here?
 385                 }
 386
 387                 // Add styles for the warning, reused from the live preview
 388                 $this->getOutput()->addModuleStyles( 'mediawiki.special.upload.styles' );
 389
 390                 $linkRenderer = $this->getLinkRenderer();
 391                 $warningHtml = '<h2>' . $this->msg( 'uploadwarning' )->escaped() . "</h2>\n"
 392                         . '<div class="mw-destfile-warning"><ul>';
 393                 foreach ( $warnings as $warning => $args ) {
 394                         if ( $warning == 'badfilename' ) {
 395                                 $this->mDesiredDestName = Title::makeTitle( NS_FILE, $args )->getText();
 396                         }
 397                         if ( $warning == 'exists' ) {
 398                                 $msg = "\t<li>" . self::getExistsWarning( $args ) . "</li>\n";
 399                         } elseif ( $warning == 'no-change' ) {
 400                                 $file = $args;
 401                                 $filename = $file->getTitle()->getPrefixedText();
 402                                 $msg = "\t<li>" . wfMessage( 'fileexists-no-change', $filename )->parse() . "</li>\n";
 403                         } elseif ( $warning == 'duplicate-version' ) {
 404                                 $file = $args[0];
 405                                 $count = count( $args );
 406                                 $filename = $file->getTitle()->getPrefixedText();
 407                                 $message = wfMessage( 'fileexists-duplicate-version' )
 408                                         ->params( $filename )
 409                                         ->numParams( $count );
 410                                 $msg = "\t<li>" . $message->parse() . "</li>\n";
 411                         } elseif ( $warning == 'was-deleted' ) {
 412                                 # If the file existed before and was deleted, warn the user of this
 413                                 $ltitle = SpecialPage::getTitleFor( 'Log' );
 414                                 $llink = $linkRenderer->makeKnownLink(
 415                                         $ltitle,
 416                                         wfMessage( 'deletionlog' )->text(),
 417                                         [],
 418                                         [
 419                                                 'type' => 'delete',
 420                                                 'page' => Title::makeTitle( NS_FILE, $args )->getPrefixedText(),
 421                                         ]
 422                                 );
 423                                 $msg = "\t<li>" . wfMessage( 'filewasdeleted' )->rawParams( $llink )->parse() . "</li>\n";
 424                         } elseif ( $warning == 'duplicate' ) {
 425                                 $msg = $this->getDupeWarning( $args );
 426                         } elseif ( $warning == 'duplicate-archive' ) {
 427                                 if ( $args === '' ) {
 428                                         $msg = "\t<li>" . $this->msg( 'file-deleted-duplicate-notitle' )->parse()
 429                                                 . "</li>\n";
 430                                 } else {
 431                                         $msg = "\t<li>" . $this->msg( 'file-deleted-duplicate',
 432                                                         Title::makeTitle( NS_FILE, $args )->getPrefixedText() )->parse()
 433                                                 . "</li>\n";
 434                                 }
 435                         } else {
 436                                 if ( $args === true ) {
 437                                         $args = [];
 438                                 } elseif ( !is_array( $args ) ) {
 439                                         $args = [ $args ];
 440                                 }
 441                                 $msg = "\t<li>" . $this->msg( $warning, $args )->parse() . "</li>\n";
 442                         }
 443                         $warningHtml .= $msg;
 444                 }
 445                 $warningHtml .= "</ul></div>\n";
 446                 $warningHtml .= $this->msg( 'uploadwarning-text' )->parseAsBlock();
 447
 448                 $form = $this->getUploadForm( $warningHtml, $sessionKey, /* $hideIgnoreWarning */ true );
 449                 $form->setSubmitText( $this->msg( 'upload-tryagain' )->text() );
 450                 $form->addButton( [
 451                         'name' => 'wpUploadIgnoreWarning',
 452                         'value' => $this->msg( 'ignorewarning' )->text()
 453                 ] );
 454                 $form->addButton( [
 455                         'name' => 'wpCancelUpload',
 456                         'value' => $this->msg( 'reuploaddesc' )->text()
 457                 ] );
 458
 459                 $this->showUploadForm( $form );
 460
 461                 # Indicate that we showed a form
 462                 return true;
 463         }
 464
 465         /**
 466          * Show the upload form with error message, but do not stash the file.
 467          *
 468          * @param string $message HTML string
 469          */
 470         protected function showUploadError( $message ) {
 471                 $message = '<h2>' . $this->msg( 'uploadwarning' )->escaped() . "</h2>\n" .
 472                         '<div class="error">' . $message . "</div>\n";
 473                 $this->showUploadForm( $this->getUploadForm( $message ) );
 474         }
 475
 476         /**
 477          * Do the upload.
 478          * Checks are made in SpecialUpload::execute()
 479          */
 480         protected function processUpload() {
 481                 // Fetch the file if required
 482                 $status = $this->mUpload->fetchFile();
 483                 if ( !$status->isOK() ) {
 484                         $this->showUploadError( $this->getOutput()->parse( $status->getWikiText() ) );
 485
 486                         return;
 487                 }
 488                 // Avoid PHP 7.1 warning of passing $this by reference
 489                 $upload = $this;
 490                 if ( !Hooks::run( 'UploadForm:BeforeProcessing', [ &$upload ] ) ) {
 491                         wfDebug( "Hook 'UploadForm:BeforeProcessing' broke processing the file.\n" );
 492                         // This code path is deprecated. If you want to break upload processing
 493                         // do so by hooking into the appropriate hooks in UploadBase::verifyUpload
 494                         // and UploadBase::verifyFile.
 495                         // If you use this hook to break uploading, the user will be returned
 496                         // an empty form with no error message whatsoever.
 497                         return;
 498                 }
 499
 500                 // Upload verification
 501                 $details = $this->mUpload->verifyUpload();
 502                 if ( $details['status'] != UploadBase::OK ) {
 503                         $this->processVerificationError( $details );
 504
 505                         return;
 506                 }
 507
 508                 // Verify permissions for this title
 509                 $permErrors = $this->mUpload->verifyTitlePermissions( $this->getUser() );
 510                 if ( $permErrors !== true ) {
 511                         $code = array_shift( $permErrors[0] );
 512                         $this->showRecoverableUploadError( $this->msg( $code, $permErrors[0] )->parse() );
 513
 514                         return;
 515                 }
 516
 517                 $this->mLocalFile = $this->mUpload->getLocalFile();
 518
 519                 // Check warnings if necessary
 520                 if ( !$this->mIgnoreWarning ) {
 521                         $warnings = $this->mUpload->checkWarnings();
 522                         if ( $this->showUploadWarning( $warnings ) ) {
 523                                 return;
 524                         }
 525                 }
 526
 527                 // This is as late as we can throttle, after expected issues have been handled
 528                 if ( UploadBase::isThrottled( $this->getUser() ) ) {
 529                         $this->showRecoverableUploadError(
 530                                 $this->msg( 'actionthrottledtext' )->escaped()
 531                         );
 532                         return;
 533                 }
 534
 535                 // Get the page text if this is not a reupload
 536                 if ( !$this->mForReUpload ) {
 537                         $pageText = self::getInitialPageText( $this->mComment, $this->mLicense,
 538                                 $this->mCopyrightStatus, $this->mCopyrightSource, $this->getConfig() );
 539                 } else {
 540                         $pageText = false;
 541                 }
 542
 543                 $changeTags = $this->getRequest()->getVal( 'wpChangeTags' );
 544                 if ( is_null( $changeTags ) || $changeTags === '' ) {
 545                         $changeTags = [];
 546                 } else {
 547                         $changeTags = array_filter( array_map( 'trim', explode( ',', $changeTags ) ) );
 548                 }
 549
 550                 if ( $changeTags ) {
 551                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
 552                                 $changeTags, $this->getUser() );
 553                         if ( !$changeTagsStatus->isOK() ) {
 554                                 $this->showUploadError( $this->getOutput()->parse( $changeTagsStatus->getWikiText() ) );
 555
 556                                 return;
 557                         }
 558                 }
 559
 560                 $status = $this->mUpload->performUpload(
 561                         $this->mComment,
 562                         $pageText,
 563                         $this->mWatchthis,
 564                         $this->getUser(),
 565                         $changeTags
 566                 );
 567
 568                 if ( !$status->isGood() ) {
 569                         $this->showRecoverableUploadError( $this->getOutput()->parse( $status->getWikiText() ) );
 570
 571                         return;
 572                 }
 573
 574                 // Success, redirect to description page
 575                 $this->mUploadSuccessful = true;
 576                 // Avoid PHP 7.1 warning of passing $this by reference
 577                 $upload = $this;
 578                 Hooks::run( 'SpecialUploadComplete', [ &$upload ] );
 579                 $this->getOutput()->redirect( $this->mLocalFile->getTitle()->getFullURL() );
 580         }
 581
 582         /**
 583          * Get the initial image page text based on a comment and optional file status information
 584          * @param string $comment
 585          * @param string $license
 586          * @param string $copyStatus
 587          * @param string $source
 588          * @param Config $config Configuration object to load data from
 589          * @return string
 590          */
 591         public static function getInitialPageText( $comment = '', $license = '',
 592                 $copyStatus = '', $source = '', Config $config = null
 593         ) {
 594                 if ( $config === null ) {
 595                         wfDebug( __METHOD__ . ' called without a Config instance passed to it' );
 596                         $config = MediaWikiServices::getInstance()->getMainConfig();
 597                 }
 598
 599                 $msg = [];
 600                 $forceUIMsgAsContentMsg = (array)$config->get( 'ForceUIMsgAsContentMsg' );
 601                 /* These messages are transcluded into the actual text of the description page.
 602                  * Thus, forcing them as content messages makes the upload to produce an int: template
 603                  * instead of hardcoding it there in the uploader language.
 604                  */
 605                 foreach ( [ 'license-header', 'filedesc', 'filestatus', 'filesource' ] as $msgName ) {
 606                         if ( in_array( $msgName, $forceUIMsgAsContentMsg ) ) {
 607                                 $msg[$msgName] = "{{int:$msgName}}";
 608                         } else {
 609                                 $msg[$msgName] = wfMessage( $msgName )->inContentLanguage()->text();
 610                         }
 611                 }
 612
 613                 if ( $config->get( 'UseCopyrightUpload' ) ) {
 614                         $licensetxt = '';
 615                         if ( $license != '' ) {
 616                                 $licensetxt = '== ' . $msg['license-header'] . " ==\n" . '{{' . $license . '}}' . "\n";
 617                         }
 618                         $pageText = '== ' . $msg['filedesc'] . " ==\n" . $comment . "\n" .
 619                                 '== ' . $msg['filestatus'] . " ==\n" . $copyStatus . "\n" .
 620                                 "$licensetxt" .
 621                                 '== ' . $msg['filesource'] . " ==\n" . $source;
 622                 } else {
 623                         if ( $license != '' ) {
 624                                 $filedesc = $comment == '' ? '' : '== ' . $msg['filedesc'] . " ==\n" . $comment . "\n";
 625                                         $pageText = $filedesc .
 626                                         '== ' . $msg['license-header'] . " ==\n" . '{{' . $license . '}}' . "\n";
 627                         } else {
 628                                 $pageText = $comment;
 629                         }
 630                 }
 631
 632                 return $pageText;
 633         }
 634
 635         /**
 636          * See if we should check the 'watch this page' checkbox on the form
 637          * based on the user's preferences and whether we're being asked
 638          * to create a new file or update an existing one.
 639          *
 640          * In the case where 'watch edits' is off but 'watch creations' is on,
 641          * we'll leave the box unchecked.
 642          *
 643          * Note that the page target can be changed *on the form*, so our check
 644          * state can get out of sync.
 645          * @return bool|string
 646          */
 647         protected function getWatchCheck() {
 648                 if ( $this->getUser()->getOption( 'watchdefault' ) ) {
 649                         // Watch all edits!
 650                         return true;
 651                 }
 652
 653                 $desiredTitleObj = Title::makeTitleSafe( NS_FILE, $this->mDesiredDestName );
 654                 if ( $desiredTitleObj instanceof Title && $this->getUser()->isWatched( $desiredTitleObj ) ) {
 655                         // Already watched, don't change that
 656                         return true;
 657                 }
 658
 659                 $local = wfLocalFile( $this->mDesiredDestName );
 660                 if ( $local && $local->exists() ) {
 661                         // We're uploading a new version of an existing file.
 662                         // No creation, so don't watch it if we're not already.
 663                         return false;
 664                 } else {
 665                         // New page should get watched if that's our option.
 666                         return $this->getUser()->getOption( 'watchcreations' ) ||
 667                                 $this->getUser()->getOption( 'watchuploads' );
 668                 }
 669         }
 670
 671         /**
 672          * Provides output to the user for a result of UploadBase::verifyUpload
 673          *
 674          * @param array $details Result of UploadBase::verifyUpload
 675          * @throws MWException
 676          */
 677         protected function processVerificationError( $details ) {
 678                 switch ( $details['status'] ) {
 679                         /** Statuses that only require name changing **/
 680                         case UploadBase::MIN_LENGTH_PARTNAME:
 681                                 $this->showRecoverableUploadError( $this->msg( 'minlength1' )->escaped() );
 682                                 break;
 683                         case UploadBase::ILLEGAL_FILENAME:
 684                                 $this->showRecoverableUploadError( $this->msg( 'illegalfilename',
 685                                         $details['filtered'] )->parse() );
 686                                 break;
 687                         case UploadBase::FILENAME_TOO_LONG:
 688                                 $this->showRecoverableUploadError( $this->msg( 'filename-toolong' )->escaped() );
 689                                 break;
 690                         case UploadBase::FILETYPE_MISSING:
 691                                 $this->showRecoverableUploadError( $this->msg( 'filetype-missing' )->parse() );
 692                                 break;
 693                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 694                                 $this->showRecoverableUploadError( $this->msg( 'windows-nonascii-filename' )->parse() );
 695                                 break;
 696
 697                         /** Statuses that require reuploading **/
 698                         case UploadBase::EMPTY_FILE:
 699                                 $this->showUploadError( $this->msg( 'emptyfile' )->escaped() );
 700                                 break;
 701                         case UploadBase::FILE_TOO_LARGE:
 702                                 $this->showUploadError( $this->msg( 'largefileserver' )->escaped() );
 703                                 break;
 704                         case UploadBase::FILETYPE_BADTYPE:
 705                                 $msg = $this->msg( 'filetype-banned-type' );
 706                                 if ( isset( $details['blacklistedExt'] ) ) {
 707                                         $msg->params( $this->getLanguage()->commaList( $details['blacklistedExt'] ) );
 708                                 } else {
 709                                         $msg->params( $details['finalExt'] );
 710                                 }
 711                                 $extensions = array_unique( $this->getConfig()->get( 'FileExtensions' ) );
 712                                 $msg->params( $this->getLanguage()->commaList( $extensions ),
 713                                         count( $extensions ) );
 714
 715                                 // Add PLURAL support for the first parameter. This results
 716                                 // in a bit unlogical parameter sequence, but does not break
 717                                 // old translations
 718                                 if ( isset( $details['blacklistedExt'] ) ) {
 719                                         $msg->params( count( $details['blacklistedExt'] ) );
 720                                 } else {
 721                                         $msg->params( 1 );
 722                                 }
 723
 724                                 $this->showUploadError( $msg->parse() );
 725                                 break;
 726                         case UploadBase::VERIFICATION_ERROR:
 727                                 unset( $details['status'] );
 728                                 $code = array_shift( $details['details'] );
 729                                 $this->showUploadError( $this->msg( $code, $details['details'] )->parse() );
 730                                 break;
 731                         case UploadBase::HOOK_ABORTED:
 732                                 if ( is_array( $details['error'] ) ) { # allow hooks to return error details in an array
 733                                         $args = $details['error'];
 734                                         $error = array_shift( $args );
 735                                 } else {
 736                                         $error = $details['error'];
 737                                         $args = null;
 738                                 }
 739
 740                                 $this->showUploadError( $this->msg( $error, $args )->parse() );
 741                                 break;
 742                         default:
 743                                 throw new MWException( __METHOD__ . ": Unknown value `{$details['status']}`" );
 744                 }
 745         }
 746
 747         /**
 748          * Remove a temporarily kept file stashed by saveTempUploadedFile().
 749          *
 750          * @return bool Success
 751          */
 752         protected function unsaveUploadedFile() {
 753                 if ( !( $this->mUpload instanceof UploadFromStash ) ) {
 754                         return true;
 755                 }
 756                 $success = $this->mUpload->unsaveUploadedFile();
 757                 if ( !$success ) {
 758                         $this->getOutput()->showFileDeleteError( $this->mUpload->getTempPath() );
 759
 760                         return false;
 761                 } else {
 762                         return true;
 763                 }
 764         }
 765
 766         /*** Functions for formatting warnings ***/
 767
 768         /**
 769          * Formats a result of UploadBase::getExistsWarning as HTML
 770          * This check is static and can be done pre-upload via AJAX
 771          *
 772          * @param array $exists The result of UploadBase::getExistsWarning
 773          * @return string Empty string if there is no warning or an HTML fragment
 774          */
 775         public static function getExistsWarning( $exists ) {
 776                 if ( !$exists ) {
 777                         return '';
 778                 }
 779
 780                 $file = $exists['file'];
 781                 $filename = $file->getTitle()->getPrefixedText();
 782                 $warnMsg = null;
 783
 784                 if ( $exists['warning'] == 'exists' ) {
 785                         // Exact match
 786                         $warnMsg = wfMessage( 'fileexists', $filename );
 787                 } elseif ( $exists['warning'] == 'page-exists' ) {
 788                         // Page exists but file does not
 789                         $warnMsg = wfMessage( 'filepageexists', $filename );
 790                 } elseif ( $exists['warning'] == 'exists-normalized' ) {
 791                         $warnMsg = wfMessage( 'fileexists-extension', $filename,
 792                                 $exists['normalizedFile']->getTitle()->getPrefixedText() );
 793                 } elseif ( $exists['warning'] == 'thumb' ) {
 794                         // Swapped argument order compared with other messages for backwards compatibility
 795                         $warnMsg = wfMessage( 'fileexists-thumbnail-yes',
 796                                 $exists['thumbFile']->getTitle()->getPrefixedText(), $filename );
 797                 } elseif ( $exists['warning'] == 'thumb-name' ) {
 798                         // Image w/o '180px-' does not exists, but we do not like these filenames
 799                         $name = $file->getName();
 800                         $badPart = substr( $name, 0, strpos( $name, '-' ) + 1 );
 801                         $warnMsg = wfMessage( 'file-thumbnail-no', $badPart );
 802                 } elseif ( $exists['warning'] == 'bad-prefix' ) {
 803                         $warnMsg = wfMessage( 'filename-bad-prefix', $exists['prefix'] );
 804                 }
 805
 806                 return $warnMsg ? $warnMsg->title( $file->getTitle() )->parse() : '';
 807         }
 808
 809         /**
 810          * Construct a warning and a gallery from an array of duplicate files.
 811          * @param array $dupes
 812          * @return string
 813          */
 814         public function getDupeWarning( $dupes ) {
 815                 if ( !$dupes ) {
 816                         return '';
 817                 }
 818
 819                 $gallery = ImageGalleryBase::factory( false, $this->getContext() );
 820                 $gallery->setShowBytes( false );
 821                 $gallery->setShowDimensions( false );
 822                 foreach ( $dupes as $file ) {
 823                         $gallery->add( $file->getTitle() );
 824                 }
 825
 826                 return '<li>' .
 827                         $this->msg( 'file-exists-duplicate' )->numParams( count( $dupes ) )->parse() .
 828                         $gallery->toHTML() . "</li>\n";
 829         }
 830
 831         protected function getGroupName() {
 832                 return 'media';
 833         }
 834
 835         /**
 836          * Should we rotate images in the preview on Special:Upload.
 837          *
 838          * This controls js: mw.config.get( 'wgFileCanRotate' )
 839          *
 840          * @todo What about non-BitmapHandler handled files?
 841          * @return bool
 842          */
 843         public static function rotationEnabled() {
 844                 $bitmapHandler = new BitmapHandler();
 845                 return $bitmapHandler->autoRotateEnabled();
 846         }
 847 }