includes/api/ApiQueryBacklinks.php

   1 <?php
   2 /**
   3  * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   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 /**
  24  * This is a three-in-one module to query:
  25  *   * backlinks  - links pointing to the given page,
  26  *   * embeddedin - what pages transclude the given page within themselves,
  27  *   * imageusage - what pages use the given image
  28  *
  29  * @ingroup API
  30  */
  31 class ApiQueryBacklinks extends ApiQueryGeneratorBase {
  32
  33         /**
  34          * @var Title
  35          */
  36         private $rootTitle;
  37
  38         private $params;
  39         /** @var array */
  40         private $cont;
  41         private $redirect;
  42         private $bl_ns, $bl_from, $bl_from_ns, $bl_table, $bl_code, $bl_title, $bl_fields, $hasNS;
  43
  44         /** @var string */
  45         private $helpUrl;
  46
  47         /**
  48          * Maps ns and title to pageid
  49          *
  50          * @var array
  51          */
  52         private $pageMap = [];
  53         private $resultArr;
  54
  55         private $redirTitles = [];
  56         private $continueStr = null;
  57
  58         // output element name, database column field prefix, database table
  59         private $backlinksSettings = [
  60                 'backlinks' => [
  61                         'code' => 'bl',
  62                         'prefix' => 'pl',
  63                         'linktbl' => 'pagelinks',
  64                         'helpurl' => 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Backlinks',
  65                 ],
  66                 'embeddedin' => [
  67                         'code' => 'ei',
  68                         'prefix' => 'tl',
  69                         'linktbl' => 'templatelinks',
  70                         'helpurl' => 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Embeddedin',
  71                 ],
  72                 'imageusage' => [
  73                         'code' => 'iu',
  74                         'prefix' => 'il',
  75                         'linktbl' => 'imagelinks',
  76                         'helpurl' => 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Imageusage',
  77                 ]
  78         ];
  79
  80         public function __construct( ApiQuery $query, $moduleName ) {
  81                 $settings = $this->backlinksSettings[$moduleName];
  82                 $prefix = $settings['prefix'];
  83                 $code = $settings['code'];
  84                 $this->resultArr = [];
  85
  86                 parent::__construct( $query, $moduleName, $code );
  87                 $this->bl_ns = $prefix . '_namespace';
  88                 $this->bl_from = $prefix . '_from';
  89                 $this->bl_from_ns = $prefix . '_from_namespace';
  90                 $this->bl_table = $settings['linktbl'];
  91                 $this->bl_code = $code;
  92                 $this->helpUrl = $settings['helpurl'];
  93
  94                 $this->hasNS = $moduleName !== 'imageusage';
  95                 if ( $this->hasNS ) {
  96                         $this->bl_title = $prefix . '_title';
  97                         $this->bl_fields = [
  98                                 $this->bl_ns,
  99                                 $this->bl_title
 100                         ];
 101                 } else {
 102                         $this->bl_title = $prefix . '_to';
 103                         $this->bl_fields = [
 104                                 $this->bl_title
 105                         ];
 106                 }
 107         }
 108
 109         public function execute() {
 110                 $this->run();
 111         }
 112
 113         public function getCacheMode( $params ) {
 114                 return 'public';
 115         }
 116
 117         public function executeGenerator( $resultPageSet ) {
 118                 $this->run( $resultPageSet );
 119         }
 120
 121         /**
 122          * @param ApiPageSet $resultPageSet
 123          * @return void
 124          */
 125         private function runFirstQuery( $resultPageSet = null ) {
 126                 $this->addTables( [ $this->bl_table, 'page' ] );
 127                 $this->addWhere( "{$this->bl_from}=page_id" );
 128                 if ( is_null( $resultPageSet ) ) {
 129                         $this->addFields( [ 'page_id', 'page_title', 'page_namespace' ] );
 130                 } else {
 131                         $this->addFields( $resultPageSet->getPageTableFields() );
 132                 }
 133                 $this->addFields( [ 'page_is_redirect', 'from_ns' => 'page_namespace' ] );
 134
 135                 $this->addWhereFld( $this->bl_title, $this->rootTitle->getDBkey() );
 136                 if ( $this->hasNS ) {
 137                         $this->addWhereFld( $this->bl_ns, $this->rootTitle->getNamespace() );
 138                 }
 139                 $this->addWhereFld( $this->bl_from_ns, $this->params['namespace'] );
 140
 141                 if ( count( $this->cont ) >= 2 ) {
 142                         $op = $this->params['dir'] == 'descending' ? '<' : '>';
 143                         if ( $this->params['namespace'] !== null && count( $this->params['namespace'] ) > 1 ) {
 144                                 $this->addWhere(
 145                                         "{$this->bl_from_ns} $op {$this->cont[0]} OR " .
 146                                         "({$this->bl_from_ns} = {$this->cont[0]} AND " .
 147                                         "{$this->bl_from} $op= {$this->cont[1]})"
 148                                 );
 149                         } else {
 150                                 $this->addWhere( "{$this->bl_from} $op= {$this->cont[1]}" );
 151                         }
 152                 }
 153
 154                 if ( $this->params['filterredir'] == 'redirects' ) {
 155                         $this->addWhereFld( 'page_is_redirect', 1 );
 156                 } elseif ( $this->params['filterredir'] == 'nonredirects' && !$this->redirect ) {
 157                         // T24245 - Check for !redirect, as filtering nonredirects, when
 158                         // getting what links to them is contradictory
 159                         $this->addWhereFld( 'page_is_redirect', 0 );
 160                 }
 161
 162                 $this->addOption( 'LIMIT', $this->params['limit'] + 1 );
 163                 $sort = ( $this->params['dir'] == 'descending' ? ' DESC' : '' );
 164                 $orderBy = [];
 165                 if ( $this->params['namespace'] !== null && count( $this->params['namespace'] ) > 1 ) {
 166                         $orderBy[] = $this->bl_from_ns . $sort;
 167                 }
 168                 $orderBy[] = $this->bl_from . $sort;
 169                 $this->addOption( 'ORDER BY', $orderBy );
 170                 $this->addOption( 'STRAIGHT_JOIN' );
 171
 172                 $res = $this->select( __METHOD__ );
 173                 $count = 0;
 174                 foreach ( $res as $row ) {
 175                         if ( ++$count > $this->params['limit'] ) {
 176                                 // We've reached the one extra which shows that there are
 177                                 // additional pages to be had. Stop here...
 178                                 // Continue string may be overridden at a later step
 179                                 $this->continueStr = "{$row->from_ns}|{$row->page_id}";
 180                                 break;
 181                         }
 182
 183                         // Fill in continuation fields for later steps
 184                         if ( count( $this->cont ) < 2 ) {
 185                                 $this->cont[] = $row->from_ns;
 186                                 $this->cont[] = $row->page_id;
 187                         }
 188
 189                         $this->pageMap[$row->page_namespace][$row->page_title] = $row->page_id;
 190                         $t = Title::makeTitle( $row->page_namespace, $row->page_title );
 191                         if ( $row->page_is_redirect ) {
 192                                 $this->redirTitles[] = $t;
 193                         }
 194
 195                         if ( is_null( $resultPageSet ) ) {
 196                                 $a = [ 'pageid' => (int)$row->page_id ];
 197                                 ApiQueryBase::addTitleInfo( $a, $t );
 198                                 if ( $row->page_is_redirect ) {
 199                                         $a['redirect'] = true;
 200                                 }
 201                                 // Put all the results in an array first
 202                                 $this->resultArr[$a['pageid']] = $a;
 203                         } else {
 204                                 $resultPageSet->processDbRow( $row );
 205                         }
 206                 }
 207         }
 208
 209         /**
 210          * @param ApiPageSet $resultPageSet
 211          * @return void
 212          */
 213         private function runSecondQuery( $resultPageSet = null ) {
 214                 $db = $this->getDB();
 215                 $this->addTables( [ 'page', $this->bl_table ] );
 216                 $this->addWhere( "{$this->bl_from}=page_id" );
 217
 218                 if ( is_null( $resultPageSet ) ) {
 219                         $this->addFields( [ 'page_id', 'page_title', 'page_namespace', 'page_is_redirect' ] );
 220                 } else {
 221                         $this->addFields( $resultPageSet->getPageTableFields() );
 222                 }
 223
 224                 $this->addFields( [ $this->bl_title, 'from_ns' => 'page_namespace' ] );
 225                 if ( $this->hasNS ) {
 226                         $this->addFields( $this->bl_ns );
 227                 }
 228
 229                 // We can't use LinkBatch here because $this->hasNS may be false
 230                 $titleWhere = [];
 231                 $allRedirNs = [];
 232                 $allRedirDBkey = [];
 233                 /** @var Title $t */
 234                 foreach ( $this->redirTitles as $t ) {
 235                         $redirNs = $t->getNamespace();
 236                         $redirDBkey = $t->getDBkey();
 237                         $titleWhere[] = "{$this->bl_title} = " . $db->addQuotes( $redirDBkey ) .
 238                                 ( $this->hasNS ? " AND {$this->bl_ns} = {$redirNs}" : '' );
 239                         $allRedirNs[$redirNs] = true;
 240                         $allRedirDBkey[$redirDBkey] = true;
 241                 }
 242                 $this->addWhere( $db->makeList( $titleWhere, LIST_OR ) );
 243                 $this->addWhereFld( 'page_namespace', $this->params['namespace'] );
 244
 245                 if ( count( $this->cont ) >= 6 ) {
 246                         $op = $this->params['dir'] == 'descending' ? '<' : '>';
 247
 248                         $where = "{$this->bl_from} $op= {$this->cont[5]}";
 249                         // Don't bother with namespace, title, or from_namespace if it's
 250                         // otherwise constant in the where clause.
 251                         if ( $this->params['namespace'] !== null && count( $this->params['namespace'] ) > 1 ) {
 252                                 $where = "{$this->bl_from_ns} $op {$this->cont[4]} OR " .
 253                                         "({$this->bl_from_ns} = {$this->cont[4]} AND ($where))";
 254                         }
 255                         if ( count( $allRedirDBkey ) > 1 ) {
 256                                 $title = $db->addQuotes( $this->cont[3] );
 257                                 $where = "{$this->bl_title} $op $title OR " .
 258                                         "({$this->bl_title} = $title AND ($where))";
 259                         }
 260                         if ( $this->hasNS && count( $allRedirNs ) > 1 ) {
 261                                 $where = "{$this->bl_ns} $op {$this->cont[2]} OR " .
 262                                         "({$this->bl_ns} = {$this->cont[2]} AND ($where))";
 263                         }
 264
 265                         $this->addWhere( $where );
 266                 }
 267                 if ( $this->params['filterredir'] == 'redirects' ) {
 268                         $this->addWhereFld( 'page_is_redirect', 1 );
 269                 } elseif ( $this->params['filterredir'] == 'nonredirects' ) {
 270                         $this->addWhereFld( 'page_is_redirect', 0 );
 271                 }
 272
 273                 $this->addOption( 'LIMIT', $this->params['limit'] + 1 );
 274                 $orderBy = [];
 275                 $sort = ( $this->params['dir'] == 'descending' ? ' DESC' : '' );
 276                 // Don't order by namespace/title/from_namespace if it's constant in the WHERE clause
 277                 if ( $this->hasNS && count( $allRedirNs ) > 1 ) {
 278                         $orderBy[] = $this->bl_ns . $sort;
 279                 }
 280                 if ( count( $allRedirDBkey ) > 1 ) {
 281                         $orderBy[] = $this->bl_title . $sort;
 282                 }
 283                 if ( $this->params['namespace'] !== null && count( $this->params['namespace'] ) > 1 ) {
 284                         $orderBy[] = $this->bl_from_ns . $sort;
 285                 }
 286                 $orderBy[] = $this->bl_from . $sort;
 287                 $this->addOption( 'ORDER BY', $orderBy );
 288                 $this->addOption( 'USE INDEX', [ 'page' => 'PRIMARY' ] );
 289
 290                 $res = $this->select( __METHOD__ );
 291                 $count = 0;
 292                 foreach ( $res as $row ) {
 293                         $ns = $this->hasNS ? $row->{$this->bl_ns} : NS_FILE;
 294
 295                         if ( ++$count > $this->params['limit'] ) {
 296                                 // We've reached the one extra which shows that there are
 297                                 // additional pages to be had. Stop here...
 298                                 // Note we must keep the parameters for the first query constant
 299                                 // This may be overridden at a later step
 300                                 $title = $row->{$this->bl_title};
 301                                 $this->continueStr = implode( '|', array_slice( $this->cont, 0, 2 ) ) .
 302                                         "|$ns|$title|{$row->from_ns}|{$row->page_id}";
 303                                 break;
 304                         }
 305
 306                         // Fill in continuation fields for later steps
 307                         if ( count( $this->cont ) < 6 ) {
 308                                 $this->cont[] = $ns;
 309                                 $this->cont[] = $row->{$this->bl_title};
 310                                 $this->cont[] = $row->from_ns;
 311                                 $this->cont[] = $row->page_id;
 312                         }
 313
 314                         if ( is_null( $resultPageSet ) ) {
 315                                 $a = [ 'pageid' => (int)$row->page_id ];
 316                                 ApiQueryBase::addTitleInfo( $a, Title::makeTitle( $row->page_namespace, $row->page_title ) );
 317                                 if ( $row->page_is_redirect ) {
 318                                         $a['redirect'] = true;
 319                                 }
 320                                 $parentID = $this->pageMap[$ns][$row->{$this->bl_title}];
 321                                 // Put all the results in an array first
 322                                 $this->resultArr[$parentID]['redirlinks'][$row->page_id] = $a;
 323                         } else {
 324                                 $resultPageSet->processDbRow( $row );
 325                         }
 326                 }
 327         }
 328
 329         /**
 330          * @param ApiPageSet $resultPageSet
 331          * @return void
 332          */
 333         private function run( $resultPageSet = null ) {
 334                 $this->params = $this->extractRequestParams( false );
 335                 $this->redirect = isset( $this->params['redirect'] ) && $this->params['redirect'];
 336                 $userMax = ( $this->redirect ? ApiBase::LIMIT_BIG1 / 2 : ApiBase::LIMIT_BIG1 );
 337                 $botMax = ( $this->redirect ? ApiBase::LIMIT_BIG2 / 2 : ApiBase::LIMIT_BIG2 );
 338
 339                 $result = $this->getResult();
 340
 341                 if ( $this->params['limit'] == 'max' ) {
 342                         $this->params['limit'] = $this->getMain()->canApiHighLimits() ? $botMax : $userMax;
 343                         $result->addParsedLimit( $this->getModuleName(), $this->params['limit'] );
 344                 } else {
 345                         $this->params['limit'] = (int)$this->params['limit'];
 346                         $this->validateLimit( 'limit', $this->params['limit'], 1, $userMax, $botMax );
 347                 }
 348
 349                 $this->rootTitle = $this->getTitleFromTitleOrPageId( $this->params );
 350
 351                 // only image titles are allowed for the root in imageinfo mode
 352                 if ( !$this->hasNS && $this->rootTitle->getNamespace() !== NS_FILE ) {
 353                         $this->dieWithError(
 354                                 [ 'apierror-imageusage-badtitle', $this->getModuleName() ],
 355                                 'bad_image_title'
 356                         );
 357                 }
 358
 359                 // Parse and validate continuation parameter
 360                 $this->cont = [];
 361                 if ( $this->params['continue'] !== null ) {
 362                         $cont = explode( '|', $this->params['continue'] );
 363
 364                         switch ( count( $cont ) ) {
 365                                 case 8:
 366                                         // redirect page ID for result adding
 367                                         $this->cont[7] = (int)$cont[7];
 368                                         $this->dieContinueUsageIf( $cont[7] !== (string)$this->cont[7] );
 369
 370                                         /* Fall through */
 371
 372                                 case 7:
 373                                         // top-level page ID for result adding
 374                                         $this->cont[6] = (int)$cont[6];
 375                                         $this->dieContinueUsageIf( $cont[6] !== (string)$this->cont[6] );
 376
 377                                         /* Fall through */
 378
 379                                 case 6:
 380                                         // ns for 2nd query (even for imageusage)
 381                                         $this->cont[2] = (int)$cont[2];
 382                                         $this->dieContinueUsageIf( $cont[2] !== (string)$this->cont[2] );
 383
 384                                         // title for 2nd query
 385                                         $this->cont[3] = $cont[3];
 386
 387                                         // from_ns for 2nd query
 388                                         $this->cont[4] = (int)$cont[4];
 389                                         $this->dieContinueUsageIf( $cont[4] !== (string)$this->cont[4] );
 390
 391                                         // from_id for 1st query
 392                                         $this->cont[5] = (int)$cont[5];
 393                                         $this->dieContinueUsageIf( $cont[5] !== (string)$this->cont[5] );
 394
 395                                         /* Fall through */
 396
 397                                 case 2:
 398                                         // from_ns for 1st query
 399                                         $this->cont[0] = (int)$cont[0];
 400                                         $this->dieContinueUsageIf( $cont[0] !== (string)$this->cont[0] );
 401
 402                                         // from_id for 1st query
 403                                         $this->cont[1] = (int)$cont[1];
 404                                         $this->dieContinueUsageIf( $cont[1] !== (string)$this->cont[1] );
 405
 406                                         break;
 407
 408                                 default:
 409                                         $this->dieContinueUsageIf( true );
 410                         }
 411
 412                         ksort( $this->cont );
 413                 }
 414
 415                 $this->runFirstQuery( $resultPageSet );
 416                 if ( $this->redirect && count( $this->redirTitles ) ) {
 417                         $this->resetQueryParams();
 418                         $this->runSecondQuery( $resultPageSet );
 419                 }
 420
 421                 // Fill in any missing fields in case it's needed below
 422                 $this->cont += [ 0, 0, 0, '', 0, 0, 0 ];
 423
 424                 if ( is_null( $resultPageSet ) ) {
 425                         // Try to add the result data in one go and pray that it fits
 426                         $code = $this->bl_code;
 427                         $data = array_map( function ( $arr ) use ( $code ) {
 428                                 if ( isset( $arr['redirlinks'] ) ) {
 429                                         $arr['redirlinks'] = array_values( $arr['redirlinks'] );
 430                                         ApiResult::setIndexedTagName( $arr['redirlinks'], $code );
 431                                 }
 432                                 return $arr;
 433                         }, array_values( $this->resultArr ) );
 434                         $fit = $result->addValue( 'query', $this->getModuleName(), $data );
 435                         if ( !$fit ) {
 436                                 // It didn't fit. Add elements one by one until the
 437                                 // result is full.
 438                                 ksort( $this->resultArr );
 439                                 if ( count( $this->cont ) >= 7 ) {
 440                                         $startAt = $this->cont[6];
 441                                 } else {
 442                                         reset( $this->resultArr );
 443                                         $startAt = key( $this->resultArr );
 444                                 }
 445                                 $idx = 0;
 446                                 foreach ( $this->resultArr as $pageID => $arr ) {
 447                                         if ( $pageID < $startAt ) {
 448                                                 continue;
 449                                         }
 450
 451                                         // Add the basic entry without redirlinks first
 452                                         $fit = $result->addValue(
 453                                                 [ 'query', $this->getModuleName() ],
 454                                                 $idx, array_diff_key( $arr, [ 'redirlinks' => '' ] ) );
 455                                         if ( !$fit ) {
 456                                                 $this->continueStr = implode( '|', array_slice( $this->cont, 0, 6 ) ) .
 457                                                         "|$pageID";
 458                                                 break;
 459                                         }
 460
 461                                         $hasRedirs = false;
 462                                         $redirLinks = isset( $arr['redirlinks'] ) ? (array)$arr['redirlinks'] : [];
 463                                         ksort( $redirLinks );
 464                                         if ( count( $this->cont ) >= 8 && $pageID == $startAt ) {
 465                                                 $redirStartAt = $this->cont[7];
 466                                         } else {
 467                                                 reset( $redirLinks );
 468                                                 $redirStartAt = key( $redirLinks );
 469                                         }
 470                                         foreach ( $redirLinks as $key => $redir ) {
 471                                                 if ( $key < $redirStartAt ) {
 472                                                         continue;
 473                                                 }
 474
 475                                                 $fit = $result->addValue(
 476                                                         [ 'query', $this->getModuleName(), $idx, 'redirlinks' ],
 477                                                         null, $redir );
 478                                                 if ( !$fit ) {
 479                                                         $this->continueStr = implode( '|', array_slice( $this->cont, 0, 6 ) ) .
 480                                                                 "|$pageID|$key";
 481                                                         break;
 482                                                 }
 483                                                 $hasRedirs = true;
 484                                         }
 485                                         if ( $hasRedirs ) {
 486                                                 $result->addIndexedTagName(
 487                                                         [ 'query', $this->getModuleName(), $idx, 'redirlinks' ],
 488                                                         $this->bl_code );
 489                                         }
 490                                         if ( !$fit ) {
 491                                                 break;
 492                                         }
 493
 494                                         $idx++;
 495                                 }
 496                         }
 497
 498                         $result->addIndexedTagName(
 499                                 [ 'query', $this->getModuleName() ],
 500                                 $this->bl_code
 501                         );
 502                 }
 503                 if ( !is_null( $this->continueStr ) ) {
 504                         $this->setContinueEnumParameter( 'continue', $this->continueStr );
 505                 }
 506         }
 507
 508         public function getAllowedParams() {
 509                 $retval = [
 510                         'title' => [
 511                                 ApiBase::PARAM_TYPE => 'string',
 512                         ],
 513                         'pageid' => [
 514                                 ApiBase::PARAM_TYPE => 'integer',
 515                         ],
 516                         'continue' => [
 517                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 518                         ],
 519                         'namespace' => [
 520                                 ApiBase::PARAM_ISMULTI => true,
 521                                 ApiBase::PARAM_TYPE => 'namespace'
 522                         ],
 523                         'dir' => [
 524                                 ApiBase::PARAM_DFLT => 'ascending',
 525                                 ApiBase::PARAM_TYPE => [
 526                                         'ascending',
 527                                         'descending'
 528                                 ]
 529                         ],
 530                         'filterredir' => [
 531                                 ApiBase::PARAM_DFLT => 'all',
 532                                 ApiBase::PARAM_TYPE => [
 533                                         'all',
 534                                         'redirects',
 535                                         'nonredirects'
 536                                 ]
 537                         ],
 538                         'limit' => [
 539                                 ApiBase::PARAM_DFLT => 10,
 540                                 ApiBase::PARAM_TYPE => 'limit',
 541                                 ApiBase::PARAM_MIN => 1,
 542                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 543                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 544                         ]
 545                 ];
 546                 if ( $this->getModuleName() == 'embeddedin' ) {
 547                         return $retval;
 548                 }
 549                 $retval['redirect'] = false;
 550
 551                 return $retval;
 552         }
 553
 554         protected function getExamplesMessages() {
 555                 static $examples = [
 556                         'backlinks' => [
 557                                 'action=query&list=backlinks&bltitle=Main%20Page'
 558                                         => 'apihelp-query+backlinks-example-simple',
 559                                 'action=query&generator=backlinks&gbltitle=Main%20Page&prop=info'
 560                                         => 'apihelp-query+backlinks-example-generator',
 561                         ],
 562                         'embeddedin' => [
 563                                 'action=query&list=embeddedin&eititle=Template:Stub'
 564                                         => 'apihelp-query+embeddedin-example-simple',
 565                                 'action=query&generator=embeddedin&geititle=Template:Stub&prop=info'
 566                                         => 'apihelp-query+embeddedin-example-generator',
 567                         ],
 568                         'imageusage' => [
 569                                 'action=query&list=imageusage&iutitle=File:Albert%20Einstein%20Head.jpg'
 570                                         => 'apihelp-query+imageusage-example-simple',
 571                                 'action=query&generator=imageusage&giutitle=File:Albert%20Einstein%20Head.jpg&prop=info'
 572                                         => 'apihelp-query+imageusage-example-generator',
 573                         ]
 574                 ];
 575
 576                 return $examples[$this->getModuleName()];
 577         }
 578
 579         public function getHelpUrls() {
 580                 return $this->helpUrl;
 581         }
 582 }