includes/specials/SpecialEditTags.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup SpecialPage
  20  */
  21
  22 /**
  23  * Special page for adding and removing change tags to individual revisions.
  24  * A lot of this is copied out of SpecialRevisiondelete.
  25  *
  26  * @ingroup SpecialPage
  27  * @since 1.25
  28  */
  29 class SpecialEditTags extends UnlistedSpecialPage {
  30         /** @var bool Was the DB modified in this request */
  31         protected $wasSaved = false;
  32
  33         /** @var bool True if the submit button was clicked, and the form was posted */
  34         private $submitClicked;
  35
  36         /** @var array Target ID list */
  37         private $ids;
  38
  39         /** @var Title Title object for target parameter */
  40         private $targetObj;
  41
  42         /** @var string Deletion type, may be revision or logentry */
  43         private $typeName;
  44
  45         /** @var ChangeTagsList Storing the list of items to be tagged */
  46         private $revList;
  47
  48         /** @var bool Whether user is allowed to perform the action */
  49         private $isAllowed;
  50
  51         /** @var string */
  52         private $reason;
  53
  54         public function __construct() {
  55                 parent::__construct( 'EditTags', 'changetags' );
  56         }
  57
  58         public function doesWrites() {
  59                 return true;
  60         }
  61
  62         public function execute( $par ) {
  63                 $this->checkPermissions();
  64                 $this->checkReadOnly();
  65
  66                 $output = $this->getOutput();
  67                 $user = $this->getUser();
  68                 $request = $this->getRequest();
  69
  70                 // Check blocks
  71                 // @TODO Use PermissionManager::isBlockedFrom() instead.
  72                 $block = $user->getBlock();
  73                 if ( $block ) {
  74                         throw new UserBlockedError( $block );
  75                 }
  76
  77                 $this->setHeaders();
  78                 $this->outputHeader();
  79
  80                 $output->addModules( [ 'mediawiki.special.edittags' ] );
  81                 $output->addModuleStyles( [
  82                         'mediawiki.interface.helpers.styles',
  83                         'mediawiki.special'
  84                 ] );
  85
  86                 $this->submitClicked = $request->wasPosted() && $request->getBool( 'wpSubmit' );
  87
  88                 // Handle our many different possible input types
  89                 $ids = $request->getVal( 'ids' );
  90                 if ( !is_null( $ids ) ) {
  91                         // Allow CSV from the form hidden field, or a single ID for show/hide links
  92                         $this->ids = explode( ',', $ids );
  93                 } else {
  94                         // Array input
  95                         $this->ids = array_keys( $request->getArray( 'ids', [] ) );
  96                 }
  97                 $this->ids = array_unique( array_filter( $this->ids ) );
  98
  99                 // No targets?
 100                 if ( count( $this->ids ) == 0 ) {
 101                         throw new ErrorPageError( 'tags-edit-nooldid-title', 'tags-edit-nooldid-text' );
 102                 }
 103
 104                 $this->typeName = $request->getVal( 'type' );
 105                 $this->targetObj = Title::newFromText( $request->getText( 'target' ) );
 106
 107                 // sanity check of parameter
 108                 switch ( $this->typeName ) {
 109                         case 'logentry':
 110                         case 'logging':
 111                                 $this->typeName = 'logentry';
 112                                 break;
 113                         default:
 114                                 $this->typeName = 'revision';
 115                                 break;
 116                 }
 117
 118                 // Allow the list type to adjust the passed target
 119                 // Yuck! Copied straight out of SpecialRevisiondelete, but it does exactly
 120                 // what we want
 121                 $this->targetObj = RevisionDeleter::suggestTarget(
 122                         $this->typeName === 'revision' ? 'revision' : 'logging',
 123                         $this->targetObj,
 124                         $this->ids
 125                 );
 126
 127                 $this->isAllowed = $user->isAllowed( 'changetags' );
 128
 129                 $this->reason = $request->getVal( 'wpReason' );
 130                 // We need a target page!
 131                 if ( is_null( $this->targetObj ) ) {
 132                         $output->addWikiMsg( 'undelete-header' );
 133                         return;
 134                 }
 135                 // Give a link to the logs/hist for this page
 136                 $this->showConvenienceLinks();
 137
 138                 // Either submit or create our form
 139                 if ( $this->isAllowed && $this->submitClicked ) {
 140                         $this->submit();
 141                 } else {
 142                         $this->showForm();
 143                 }
 144
 145                 // Show relevant lines from the tag log
 146                 $tagLogPage = new LogPage( 'tag' );
 147                 $output->addHTML( "<h2>" . $tagLogPage->getName()->escaped() . "</h2>\n" );
 148                 LogEventsList::showLogExtract(
 149                         $output,
 150                         'tag',
 151                         $this->targetObj,
 152                         '', /* user */
 153                         [ 'lim' => 25, 'conds' => [], 'useMaster' => $this->wasSaved ]
 154                 );
 155         }
 156
 157         /**
 158          * Show some useful links in the subtitle
 159          */
 160         protected function showConvenienceLinks() {
 161                 // Give a link to the logs/hist for this page
 162                 if ( $this->targetObj ) {
 163                         // Also set header tabs to be for the target.
 164                         $this->getSkin()->setRelevantTitle( $this->targetObj );
 165
 166                         $linkRenderer = $this->getLinkRenderer();
 167                         $links = [];
 168                         $links[] = $linkRenderer->makeKnownLink(
 169                                 SpecialPage::getTitleFor( 'Log' ),
 170                                 $this->msg( 'viewpagelogs' )->text(),
 171                                 [],
 172                                 [
 173                                         'page' => $this->targetObj->getPrefixedText(),
 174                                         'wpfilters' => [ 'tag' ],
 175                                 ]
 176                         );
 177                         if ( !$this->targetObj->isSpecialPage() ) {
 178                                 // Give a link to the page history
 179                                 $links[] = $linkRenderer->makeKnownLink(
 180                                         $this->targetObj,
 181                                         $this->msg( 'pagehist' )->text(),
 182                                         [],
 183                                         [ 'action' => 'history' ]
 184                                 );
 185                         }
 186                         // Link to Special:Tags
 187                         $links[] = $linkRenderer->makeKnownLink(
 188                                 SpecialPage::getTitleFor( 'Tags' ),
 189                                 $this->msg( 'tags-edit-manage-link' )->text()
 190                         );
 191                         // Logs themselves don't have histories or archived revisions
 192                         $this->getOutput()->addSubtitle( $this->getLanguage()->pipeList( $links ) );
 193                 }
 194         }
 195
 196         /**
 197          * Get the list object for this request
 198          * @return ChangeTagsList
 199          */
 200         protected function getList() {
 201                 if ( is_null( $this->revList ) ) {
 202                         $this->revList = ChangeTagsList::factory( $this->typeName, $this->getContext(),
 203                                 $this->targetObj, $this->ids );
 204                 }
 205
 206                 return $this->revList;
 207         }
 208
 209         /**
 210          * Show a list of items that we will operate on, and show a form which allows
 211          * the user to modify the tags applied to those items.
 212          */
 213         protected function showForm() {
 214                 $out = $this->getOutput();
 215                 // Messages: tags-edit-revision-selected, tags-edit-logentry-selected
 216                 $out->wrapWikiMsg( "<strong>$1</strong>", [
 217                         "tags-edit-{$this->typeName}-selected",
 218                         $this->getLanguage()->formatNum( count( $this->ids ) ),
 219                         $this->targetObj->getPrefixedText()
 220                 ] );
 221
 222                 $this->addHelpLink( 'Help:Tags' );
 223                 $out->addHTML( "<ul>" );
 224
 225                 $numRevisions = 0;
 226                 // Live revisions...
 227                 $list = $this->getList();
 228                 for ( $list->reset(); $list->current(); $list->next() ) {
 229                         $item = $list->current();
 230                         if ( !$item->canView() ) {
 231                                 throw new ErrorPageError( 'permissionserrors', 'tags-update-no-permission' );
 232                         }
 233                         $numRevisions++;
 234                         $out->addHTML( $item->getHTML() );
 235                 }
 236
 237                 if ( !$numRevisions ) {
 238                         throw new ErrorPageError( 'tags-edit-nooldid-title', 'tags-edit-nooldid-text' );
 239                 }
 240
 241                 $out->addHTML( "</ul>" );
 242                 // Explanation text
 243                 $out->wrapWikiMsg( '<p>$1</p>', "tags-edit-{$this->typeName}-explanation" );
 244
 245                 // Show form if the user can submit
 246                 if ( $this->isAllowed ) {
 247                         $form = Xml::openElement( 'form', [ 'method' => 'post',
 248                                         'action' => $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] ),
 249                                         'id' => 'mw-revdel-form-revisions' ] ) .
 250                                 Xml::fieldset( $this->msg( "tags-edit-{$this->typeName}-legend",
 251                                         count( $this->ids ) )->text() ) .
 252                                 $this->buildCheckBoxes() .
 253                                 Xml::openElement( 'table' ) .
 254                                 "<tr>\n" .
 255                                         '<td class="mw-label">' .
 256                                                 Xml::label( $this->msg( 'tags-edit-reason' )->text(), 'wpReason' ) .
 257                                         '</td>' .
 258                                         '<td class="mw-input">' .
 259                                                 Xml::input( 'wpReason', 60, $this->reason, [
 260                                                         'id' => 'wpReason',
 261                                                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 262                                                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 263                                                         // Unicode codepoints.
 264                                                         // "- 155" is to leave room for the auto-generated part of the log entry.
 265                                                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT - 155,
 266                                                 ] ) .
 267                                         '</td>' .
 268                                 "</tr><tr>\n" .
 269                                         '<td></td>' .
 270                                         '<td class="mw-submit">' .
 271                                                 Xml::submitButton( $this->msg( "tags-edit-{$this->typeName}-submit",
 272                                                         $numRevisions )->text(), [ 'name' => 'wpSubmit' ] ) .
 273                                         '</td>' .
 274                                 "</tr>\n" .
 275                                 Xml::closeElement( 'table' ) .
 276                                 Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() ) .
 277                                 Html::hidden( 'target', $this->targetObj->getPrefixedText() ) .
 278                                 Html::hidden( 'type', $this->typeName ) .
 279                                 Html::hidden( 'ids', implode( ',', $this->ids ) ) .
 280                                 Xml::closeElement( 'fieldset' ) . "\n" .
 281                                 Xml::closeElement( 'form' ) . "\n";
 282                 } else {
 283                         $form = '';
 284                 }
 285                 $out->addHTML( $form );
 286         }
 287
 288         /**
 289          * @return string HTML
 290          */
 291         protected function buildCheckBoxes() {
 292                 // If there is just one item, provide the user with a multi-select field
 293                 $list = $this->getList();
 294                 $tags = [];
 295                 if ( $list->length() == 1 ) {
 296                         $list->reset();
 297                         $tags = $list->current()->getTags();
 298                         if ( $tags ) {
 299                                 $tags = explode( ',', $tags );
 300                         } else {
 301                                 $tags = [];
 302                         }
 303
 304                         $html = '<table id="mw-edittags-tags-selector">';
 305                         $html .= '<tr><td>' . $this->msg( 'tags-edit-existing-tags' )->escaped() .
 306                                 '</td><td>';
 307                         if ( $tags ) {
 308                                 $html .= $this->getLanguage()->commaList( array_map( 'htmlspecialchars', $tags ) );
 309                         } else {
 310                                 $html .= $this->msg( 'tags-edit-existing-tags-none' )->parse();
 311                         }
 312                         $html .= '</td></tr>';
 313                         $tagSelect = $this->getTagSelect( $tags, $this->msg( 'tags-edit-new-tags' )->plain() );
 314                         $html .= '<tr><td>' . $tagSelect[0] . '</td><td>' . $tagSelect[1];
 315                 } else {
 316                         // Otherwise, use a multi-select field for adding tags, and a list of
 317                         // checkboxes for removing them
 318
 319                         for ( $list->reset(); $list->current(); $list->next() ) {
 320                                 $currentTags = $list->current()->getTags();
 321                                 if ( $currentTags ) {
 322                                         $tags = array_merge( $tags, explode( ',', $currentTags ) );
 323                                 }
 324                         }
 325                         $tags = array_unique( $tags );
 326
 327                         $html = '<table id="mw-edittags-tags-selector-multi"><tr><td>';
 328                         $tagSelect = $this->getTagSelect( [], $this->msg( 'tags-edit-add' )->plain() );
 329                         $html .= '<p>' . $tagSelect[0] . '</p>' . $tagSelect[1] . '</td><td>';
 330                         $html .= Xml::element( 'p', null, $this->msg( 'tags-edit-remove' )->plain() );
 331                         $html .= Xml::checkLabel( $this->msg( 'tags-edit-remove-all-tags' )->plain(),
 332                                 'wpRemoveAllTags', 'mw-edittags-remove-all' );
 333                         $i = 0; // used for generating checkbox IDs only
 334                         foreach ( $tags as $tag ) {
 335                                 $html .= Xml::element( 'br' ) . "\n" . Xml::checkLabel( $tag,
 336                                         'wpTagsToRemove[]', 'mw-edittags-remove-' . $i++, false, [
 337                                                 'value' => $tag,
 338                                                 'class' => 'mw-edittags-remove-checkbox',
 339                                         ] );
 340                         }
 341                 }
 342
 343                 // also output the tags currently applied as a hidden form field, so we
 344                 // know what to remove from the revision/log entry when the form is submitted
 345                 $html .= Html::hidden( 'wpExistingTags', implode( ',', $tags ) );
 346                 $html .= '</td></tr></table>';
 347
 348                 return $html;
 349         }
 350
 351         /**
 352          * Returns a <select multiple> element with a list of change tags that can be
 353          * applied by users.
 354          *
 355          * @param array $selectedTags The tags that should be preselected in the
 356          * list. Any tags in this list, but not in the list returned by
 357          * ChangeTags::listExplicitlyDefinedTags, will be appended to the <select>
 358          * element.
 359          * @param string $label The text of a <label> to precede the <select>
 360          * @return array HTML <label> element at index 0, HTML <select> element at
 361          * index 1
 362          */
 363         protected function getTagSelect( $selectedTags, $label ) {
 364                 $result = [];
 365                 $result[0] = Xml::label( $label, 'mw-edittags-tag-list' );
 366
 367                 $select = new XmlSelect( 'wpTagList[]', 'mw-edittags-tag-list', $selectedTags );
 368                 $select->setAttribute( 'multiple', 'multiple' );
 369                 $select->setAttribute( 'size', '8' );
 370
 371                 $tags = ChangeTags::listExplicitlyDefinedTags();
 372                 $tags = array_unique( array_merge( $tags, $selectedTags ) );
 373
 374                 // Values of $tags are also used as <option> labels
 375                 $select->addOptions( array_combine( $tags, $tags ) );
 376
 377                 $result[1] = $select->getHTML();
 378                 return $result;
 379         }
 380
 381         /**
 382          * UI entry point for form submission.
 383          * @return bool
 384          */
 385         protected function submit() {
 386                 // Check edit token on submission
 387                 $request = $this->getRequest();
 388                 $token = $request->getVal( 'wpEditToken' );
 389                 if ( $this->submitClicked && !$this->getUser()->matchEditToken( $token ) ) {
 390                         $this->getOutput()->addWikiMsg( 'sessionfailure' );
 391                         return false;
 392                 }
 393
 394                 // Evaluate incoming request data
 395                 $tagList = $request->getArray( 'wpTagList' );
 396                 if ( is_null( $tagList ) ) {
 397                         $tagList = [];
 398                 }
 399                 $existingTags = $request->getVal( 'wpExistingTags' );
 400                 if ( is_null( $existingTags ) || $existingTags === '' ) {
 401                         $existingTags = [];
 402                 } else {
 403                         $existingTags = explode( ',', $existingTags );
 404                 }
 405
 406                 if ( count( $this->ids ) > 1 ) {
 407                         // multiple revisions selected
 408                         $tagsToAdd = $tagList;
 409                         if ( $request->getBool( 'wpRemoveAllTags' ) ) {
 410                                 $tagsToRemove = $existingTags;
 411                         } else {
 412                                 $tagsToRemove = $request->getArray( 'wpTagsToRemove' );
 413                         }
 414                 } else {
 415                         // single revision selected
 416                         // The user tells us which tags they want associated to the revision.
 417                         // We have to figure out which ones to add, and which to remove.
 418                         $tagsToAdd = array_diff( $tagList, $existingTags );
 419                         $tagsToRemove = array_diff( $existingTags, $tagList );
 420                 }
 421
 422                 if ( !$tagsToAdd && !$tagsToRemove ) {
 423                         $status = Status::newFatal( 'tags-edit-none-selected' );
 424                 } else {
 425                         $status = $this->getList()->updateChangeTagsOnAll( $tagsToAdd,
 426                                 $tagsToRemove, null, $this->reason, $this->getUser() );
 427                 }
 428
 429                 if ( $status->isGood() ) {
 430                         $this->success();
 431                         return true;
 432                 } else {
 433                         $this->failure( $status );
 434                         return false;
 435                 }
 436         }
 437
 438         /**
 439          * Report that the submit operation succeeded
 440          */
 441         protected function success() {
 442                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 443                 $this->getOutput()->wrapWikiMsg( "<div class=\"successbox\">\n$1\n</div>",
 444                         'tags-edit-success' );
 445                 $this->wasSaved = true;
 446                 $this->revList->reloadFromMaster();
 447                 $this->reason = ''; // no need to spew the reason back at the user
 448                 $this->showForm();
 449         }
 450
 451         /**
 452          * Report that the submit operation failed
 453          * @param Status $status
 454          */
 455         protected function failure( $status ) {
 456                 $this->getOutput()->setPageTitle( $this->msg( 'actionfailed' ) );
 457                 $this->getOutput()->wrapWikiTextAsInterface(
 458                         'errorbox', $status->getWikiText( 'tags-edit-failure' )
 459                 );
 460                 $this->showForm();
 461         }
 462
 463         public function getDescription() {
 464                 return $this->msg( 'tags-edit-title' )->text();
 465         }
 466
 467         protected function getGroupName() {
 468                 return 'pagetools';
 469         }
 470 }