includes/api/ApiHelp.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Aug 29, 2014
   6  *
   7  * Copyright © 2014 Wikimedia Foundation and contributors
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 use HtmlFormatter\HtmlFormatter;
  28 use MediaWiki\MediaWikiServices;
  29
  30 /**
  31  * Class to output help for an API module
  32  *
  33  * @since 1.25 completely rewritten
  34  * @ingroup API
  35  */
  36 class ApiHelp extends ApiBase {
  37         public function execute() {
  38                 $params = $this->extractRequestParams();
  39                 $modules = [];
  40
  41                 foreach ( $params['modules'] as $path ) {
  42                         $modules[] = $this->getModuleFromPath( $path );
  43                 }
  44
  45                 // Get the help
  46                 $context = new DerivativeContext( $this->getMain()->getContext() );
  47                 $context->setSkin( SkinFactory::getDefaultInstance()->makeSkin( 'apioutput' ) );
  48                 $context->setLanguage( $this->getMain()->getLanguage() );
  49                 $context->setTitle( SpecialPage::getTitleFor( 'ApiHelp' ) );
  50                 $out = new OutputPage( $context );
  51                 $out->setCopyrightUrl( 'https://www.mediawiki.org/wiki/Special:MyLanguage/Copyright' );
  52                 $context->setOutput( $out );
  53
  54                 self::getHelp( $context, $modules, $params );
  55
  56                 // Grab the output from the skin
  57                 ob_start();
  58                 $context->getOutput()->output();
  59                 $html = ob_get_clean();
  60
  61                 $result = $this->getResult();
  62                 if ( $params['wrap'] ) {
  63                         $data = [
  64                                 'mime' => 'text/html',
  65                                 'help' => $html,
  66                         ];
  67                         ApiResult::setSubelementsList( $data, 'help' );
  68                         $result->addValue( null, $this->getModuleName(), $data );
  69                 } else {
  70                         $result->reset();
  71                         $result->addValue( null, 'text', $html, ApiResult::NO_SIZE_CHECK );
  72                         $result->addValue( null, 'mime', 'text/html', ApiResult::NO_SIZE_CHECK );
  73                 }
  74         }
  75
  76         /**
  77          * Generate help for the specified modules
  78          *
  79          * Help is placed into the OutputPage object returned by
  80          * $context->getOutput().
  81          *
  82          * Recognized options include:
  83          *  - headerlevel: (int) Header tag level
  84          *  - nolead: (bool) Skip the inclusion of api-help-lead
  85          *  - noheader: (bool) Skip the inclusion of the top-level section headers
  86          *  - submodules: (bool) Include help for submodules of the current module
  87          *  - recursivesubmodules: (bool) Include help for submodules recursively
  88          *  - helptitle: (string) Title to link for additional modules' help. Should contain $1.
  89          *  - toc: (bool) Include a table of contents
  90          *
  91          * @param IContextSource $context
  92          * @param ApiBase[]|ApiBase $modules
  93          * @param array $options Formatting options (described above)
  94          */
  95         public static function getHelp( IContextSource $context, $modules, array $options ) {
  96                 global $wgContLang;
  97
  98                 if ( !is_array( $modules ) ) {
  99                         $modules = [ $modules ];
 100                 }
 101
 102                 $out = $context->getOutput();
 103                 $out->addModuleStyles( [
 104                         'mediawiki.hlist',
 105                         'mediawiki.apihelp',
 106                 ] );
 107                 if ( !empty( $options['toc'] ) ) {
 108                         $out->addModules( 'mediawiki.toc' );
 109                 }
 110                 $out->setPageTitle( $context->msg( 'api-help-title' ) );
 111
 112                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 113                 $cacheKey = null;
 114                 if ( count( $modules ) == 1 && $modules[0] instanceof ApiMain &&
 115                         $options['recursivesubmodules'] && $context->getLanguage() === $wgContLang
 116                 ) {
 117                         $cacheHelpTimeout = $context->getConfig()->get( 'APICacheHelpTimeout' );
 118                         if ( $cacheHelpTimeout > 0 ) {
 119                                 // Get help text from cache if present
 120                                 $cacheKey = $cache->makeKey( 'apihelp', $modules[0]->getModulePath(),
 121                                         (int)!empty( $options['toc'] ),
 122                                         str_replace( ' ', '_', SpecialVersion::getVersion( 'nodb' ) ) );
 123                                 $cached = $cache->get( $cacheKey );
 124                                 if ( $cached ) {
 125                                         $out->addHTML( $cached );
 126                                         return;
 127                                 }
 128                         }
 129                 }
 130                 if ( $out->getHTML() !== '' ) {
 131                         // Don't save to cache, there's someone else's content in the page
 132                         // already
 133                         $cacheKey = null;
 134                 }
 135
 136                 $options['recursivesubmodules'] = !empty( $options['recursivesubmodules'] );
 137                 $options['submodules'] = $options['recursivesubmodules'] || !empty( $options['submodules'] );
 138
 139                 // Prepend lead
 140                 if ( empty( $options['nolead'] ) ) {
 141                         $msg = $context->msg( 'api-help-lead' );
 142                         if ( !$msg->isDisabled() ) {
 143                                 $out->addHTML( $msg->parseAsBlock() );
 144                         }
 145                 }
 146
 147                 $haveModules = [];
 148                 $html = self::getHelpInternal( $context, $modules, $options, $haveModules );
 149                 if ( !empty( $options['toc'] ) && $haveModules ) {
 150                         $out->addHTML( Linker::generateTOC( $haveModules, $context->getLanguage() ) );
 151                 }
 152                 $out->addHTML( $html );
 153
 154                 $helptitle = isset( $options['helptitle'] ) ? $options['helptitle'] : null;
 155                 $html = self::fixHelpLinks( $out->getHTML(), $helptitle, $haveModules );
 156                 $out->clearHTML();
 157                 $out->addHTML( $html );
 158
 159                 if ( $cacheKey !== null ) {
 160                         $cache->set( $cacheKey, $out->getHTML(), $cacheHelpTimeout );
 161                 }
 162         }
 163
 164         /**
 165          * Replace Special:ApiHelp links with links to api.php
 166          *
 167          * @param string $html
 168          * @param string|null $helptitle Title to link to rather than api.php, must contain '$1'
 169          * @param array $localModules Keys are modules to link within the current page, values are ignored
 170          * @return string
 171          */
 172         public static function fixHelpLinks( $html, $helptitle = null, $localModules = [] ) {
 173                 $formatter = new HtmlFormatter( $html );
 174                 $doc = $formatter->getDoc();
 175                 $xpath = new DOMXPath( $doc );
 176                 $nodes = $xpath->query( '//a[@href][not(contains(@class,\'apihelp-linktrail\'))]' );
 177                 foreach ( $nodes as $node ) {
 178                         $href = $node->getAttribute( 'href' );
 179                         do {
 180                                 $old = $href;
 181                                 $href = rawurldecode( $href );
 182                         } while ( $old !== $href );
 183                         if ( preg_match( '!Special:ApiHelp/([^&/|#]+)((?:#.*)?)!', $href, $m ) ) {
 184                                 if ( isset( $localModules[$m[1]] ) ) {
 185                                         $href = $m[2] === '' ? '#' . $m[1] : $m[2];
 186                                 } elseif ( $helptitle !== null ) {
 187                                         $href = Title::newFromText( str_replace( '$1', $m[1], $helptitle ) . $m[2] )
 188                                                 ->getFullURL();
 189                                 } else {
 190                                         $href = wfAppendQuery( wfScript( 'api' ), [
 191                                                 'action' => 'help',
 192                                                 'modules' => $m[1],
 193                                         ] ) . $m[2];
 194                                 }
 195                                 $node->setAttribute( 'href', $href );
 196                                 $node->removeAttribute( 'title' );
 197                         }
 198                 }
 199
 200                 return $formatter->getText();
 201         }
 202
 203         /**
 204          * Wrap a message in HTML with a class.
 205          *
 206          * @param Message $msg
 207          * @param string $class
 208          * @param string $tag
 209          * @return string
 210          */
 211         private static function wrap( Message $msg, $class, $tag = 'span' ) {
 212                 return Html::rawElement( $tag, [ 'class' => $class ],
 213                         $msg->parse()
 214                 );
 215         }
 216
 217         /**
 218          * Recursively-called function to actually construct the help
 219          *
 220          * @param IContextSource $context
 221          * @param ApiBase[] $modules
 222          * @param array $options
 223          * @param array &$haveModules
 224          * @return string
 225          */
 226         private static function getHelpInternal( IContextSource $context, array $modules,
 227                 array $options, &$haveModules
 228         ) {
 229                 $out = '';
 230
 231                 $level = empty( $options['headerlevel'] ) ? 2 : $options['headerlevel'];
 232                 if ( empty( $options['tocnumber'] ) ) {
 233                         $tocnumber = [ 2 => 0 ];
 234                 } else {
 235                         $tocnumber = &$options['tocnumber'];
 236                 }
 237
 238                 foreach ( $modules as $module ) {
 239                         $tocnumber[$level]++;
 240                         $path = $module->getModulePath();
 241                         $module->setContext( $context );
 242                         $help = [
 243                                 'header' => '',
 244                                 'flags' => '',
 245                                 'description' => '',
 246                                 'help-urls' => '',
 247                                 'parameters' => '',
 248                                 'examples' => '',
 249                                 'submodules' => '',
 250                         ];
 251
 252                         if ( empty( $options['noheader'] ) || !empty( $options['toc'] ) ) {
 253                                 $anchor = $path;
 254                                 $i = 1;
 255                                 while ( isset( $haveModules[$anchor] ) ) {
 256                                         $anchor = $path . '|' . ++$i;
 257                                 }
 258
 259                                 if ( $module->isMain() ) {
 260                                         $headerContent = $context->msg( 'api-help-main-header' )->parse();
 261                                         $headerAttr = [
 262                                                 'class' => 'apihelp-header',
 263                                         ];
 264                                 } else {
 265                                         $name = $module->getModuleName();
 266                                         $headerContent = $module->getParent()->getModuleManager()->getModuleGroup( $name ) .
 267                                                 "=$name";
 268                                         if ( $module->getModulePrefix() !== '' ) {
 269                                                 $headerContent .= ' ' .
 270                                                         $context->msg( 'parentheses', $module->getModulePrefix() )->parse();
 271                                         }
 272                                         // Module names are always in English and not localized,
 273                                         // so English language and direction must be set explicitly,
 274                                         // otherwise parentheses will get broken in RTL wikis
 275                                         $headerAttr = [
 276                                                 'class' => 'apihelp-header apihelp-module-name',
 277                                                 'dir' => 'ltr',
 278                                                 'lang' => 'en',
 279                                         ];
 280                                 }
 281
 282                                 $headerAttr['id'] = $anchor;
 283
 284                                 $haveModules[$anchor] = [
 285                                         'toclevel' => count( $tocnumber ),
 286                                         'level' => $level,
 287                                         'anchor' => $anchor,
 288                                         'line' => $headerContent,
 289                                         'number' => implode( '.', $tocnumber ),
 290                                         'index' => false,
 291                                 ];
 292                                 if ( empty( $options['noheader'] ) ) {
 293                                         $help['header'] .= Html::element(
 294                                                 'h' . min( 6, $level ),
 295                                                 $headerAttr,
 296                                                 $headerContent
 297                                         );
 298                                 }
 299                         } else {
 300                                 $haveModules[$path] = true;
 301                         }
 302
 303                         $links = [];
 304                         $any = false;
 305                         for ( $m = $module; $m !== null; $m = $m->getParent() ) {
 306                                 $name = $m->getModuleName();
 307                                 if ( $name === 'main_int' ) {
 308                                         $name = 'main';
 309                                 }
 310
 311                                 if ( count( $modules ) === 1 && $m === $modules[0] &&
 312                                         !( !empty( $options['submodules'] ) && $m->getModuleManager() )
 313                                 ) {
 314                                         $link = Html::element( 'b', [ 'dir' => 'ltr', 'lang' => 'en' ], $name );
 315                                 } else {
 316                                         $link = SpecialPage::getTitleFor( 'ApiHelp', $m->getModulePath() )->getLocalURL();
 317                                         $link = Html::element( 'a',
 318                                                 [ 'href' => $link, 'class' => 'apihelp-linktrail', 'dir' => 'ltr', 'lang' => 'en' ],
 319                                                 $name
 320                                         );
 321                                         $any = true;
 322                                 }
 323                                 array_unshift( $links, $link );
 324                         }
 325                         if ( $any ) {
 326                                 $help['header'] .= self::wrap(
 327                                         $context->msg( 'parentheses' )
 328                                                 ->rawParams( $context->getLanguage()->pipeList( $links ) ),
 329                                         'apihelp-linktrail', 'div'
 330                                 );
 331                         }
 332
 333                         $flags = $module->getHelpFlags();
 334                         $help['flags'] .= Html::openElement( 'div',
 335                                 [ 'class' => 'apihelp-block apihelp-flags' ] );
 336                         $msg = $context->msg( 'api-help-flags' );
 337                         if ( !$msg->isDisabled() ) {
 338                                 $help['flags'] .= self::wrap(
 339                                         $msg->numParams( count( $flags ) ), 'apihelp-block-head', 'div'
 340                                 );
 341                         }
 342                         $help['flags'] .= Html::openElement( 'ul' );
 343                         foreach ( $flags as $flag ) {
 344                                 $help['flags'] .= Html::rawElement( 'li', null,
 345                                         self::wrap( $context->msg( "api-help-flag-$flag" ), "apihelp-flag-$flag" )
 346                                 );
 347                         }
 348                         $sourceInfo = $module->getModuleSourceInfo();
 349                         if ( $sourceInfo ) {
 350                                 if ( isset( $sourceInfo['namemsg'] ) ) {
 351                                         $extname = $context->msg( $sourceInfo['namemsg'] )->text();
 352                                 } else {
 353                                         // Probably English, so wrap it.
 354                                         $extname = Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $sourceInfo['name'] );
 355                                 }
 356                                 $help['flags'] .= Html::rawElement( 'li', null,
 357                                         self::wrap(
 358                                                 $context->msg( 'api-help-source', $extname, $sourceInfo['name'] ),
 359                                                 'apihelp-source'
 360                                         )
 361                                 );
 362
 363                                 $link = SpecialPage::getTitleFor( 'Version', 'License/' . $sourceInfo['name'] );
 364                                 if ( isset( $sourceInfo['license-name'] ) ) {
 365                                         $msg = $context->msg( 'api-help-license', $link,
 366                                                 Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $sourceInfo['license-name'] )
 367                                         );
 368                                 } elseif ( SpecialVersion::getExtLicenseFileName( dirname( $sourceInfo['path'] ) ) ) {
 369                                         $msg = $context->msg( 'api-help-license-noname', $link );
 370                                 } else {
 371                                         $msg = $context->msg( 'api-help-license-unknown' );
 372                                 }
 373                                 $help['flags'] .= Html::rawElement( 'li', null,
 374                                         self::wrap( $msg, 'apihelp-license' )
 375                                 );
 376                         } else {
 377                                 $help['flags'] .= Html::rawElement( 'li', null,
 378                                         self::wrap( $context->msg( 'api-help-source-unknown' ), 'apihelp-source' )
 379                                 );
 380                                 $help['flags'] .= Html::rawElement( 'li', null,
 381                                         self::wrap( $context->msg( 'api-help-license-unknown' ), 'apihelp-license' )
 382                                 );
 383                         }
 384                         $help['flags'] .= Html::closeElement( 'ul' );
 385                         $help['flags'] .= Html::closeElement( 'div' );
 386
 387                         foreach ( $module->getFinalDescription() as $msg ) {
 388                                 $msg->setContext( $context );
 389                                 $help['description'] .= $msg->parseAsBlock();
 390                         }
 391
 392                         $urls = $module->getHelpUrls();
 393                         if ( $urls ) {
 394                                 $help['help-urls'] .= Html::openElement( 'div',
 395                                         [ 'class' => 'apihelp-block apihelp-help-urls' ]
 396                                 );
 397                                 $msg = $context->msg( 'api-help-help-urls' );
 398                                 if ( !$msg->isDisabled() ) {
 399                                         $help['help-urls'] .= self::wrap(
 400                                                 $msg->numParams( count( $urls ) ), 'apihelp-block-head', 'div'
 401                                         );
 402                                 }
 403                                 if ( !is_array( $urls ) ) {
 404                                         $urls = [ $urls ];
 405                                 }
 406                                 $help['help-urls'] .= Html::openElement( 'ul' );
 407                                 foreach ( $urls as $url ) {
 408                                         $help['help-urls'] .= Html::rawElement( 'li', null,
 409                                                 Html::element( 'a', [ 'href' => $url, 'dir' => 'ltr' ], $url )
 410                                         );
 411                                 }
 412                                 $help['help-urls'] .= Html::closeElement( 'ul' );
 413                                 $help['help-urls'] .= Html::closeElement( 'div' );
 414                         }
 415
 416                         $params = $module->getFinalParams( ApiBase::GET_VALUES_FOR_HELP );
 417                         $dynamicParams = $module->dynamicParameterDocumentation();
 418                         $groups = [];
 419                         if ( $params || $dynamicParams !== null ) {
 420                                 $help['parameters'] .= Html::openElement( 'div',
 421                                         [ 'class' => 'apihelp-block apihelp-parameters' ]
 422                                 );
 423                                 $msg = $context->msg( 'api-help-parameters' );
 424                                 if ( !$msg->isDisabled() ) {
 425                                         $help['parameters'] .= self::wrap(
 426                                                 $msg->numParams( count( $params ) ), 'apihelp-block-head', 'div'
 427                                         );
 428                                 }
 429                                 $help['parameters'] .= Html::openElement( 'dl' );
 430
 431                                 $descriptions = $module->getFinalParamDescription();
 432
 433                                 foreach ( $params as $name => $settings ) {
 434                                         if ( !is_array( $settings ) ) {
 435                                                 $settings = [ ApiBase::PARAM_DFLT => $settings ];
 436                                         }
 437
 438                                         $help['parameters'] .= Html::rawElement( 'dt', null,
 439                                                 Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $module->encodeParamName( $name ) )
 440                                         );
 441
 442                                         // Add description
 443                                         $description = [];
 444                                         if ( isset( $descriptions[$name] ) ) {
 445                                                 foreach ( $descriptions[$name] as $msg ) {
 446                                                         $msg->setContext( $context );
 447                                                         $description[] = $msg->parseAsBlock();
 448                                                 }
 449                                         }
 450
 451                                         // Add usage info
 452                                         $info = [];
 453
 454                                         // Required?
 455                                         if ( !empty( $settings[ApiBase::PARAM_REQUIRED] ) ) {
 456                                                 $info[] = $context->msg( 'api-help-param-required' )->parse();
 457                                         }
 458
 459                                         // Custom info?
 460                                         if ( !empty( $settings[ApiBase::PARAM_HELP_MSG_INFO] ) ) {
 461                                                 foreach ( $settings[ApiBase::PARAM_HELP_MSG_INFO] as $i ) {
 462                                                         $tag = array_shift( $i );
 463                                                         $info[] = $context->msg( "apihelp-{$path}-paraminfo-{$tag}" )
 464                                                                 ->numParams( count( $i ) )
 465                                                                 ->params( $context->getLanguage()->commaList( $i ) )
 466                                                                 ->params( $module->getModulePrefix() )
 467                                                                 ->parse();
 468                                                 }
 469                                         }
 470
 471                                         // Type documentation
 472                                         if ( !isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 473                                                 $dflt = isset( $settings[ApiBase::PARAM_DFLT] )
 474                                                         ? $settings[ApiBase::PARAM_DFLT]
 475                                                         : null;
 476                                                 if ( is_bool( $dflt ) ) {
 477                                                         $settings[ApiBase::PARAM_TYPE] = 'boolean';
 478                                                 } elseif ( is_string( $dflt ) || is_null( $dflt ) ) {
 479                                                         $settings[ApiBase::PARAM_TYPE] = 'string';
 480                                                 } elseif ( is_int( $dflt ) ) {
 481                                                         $settings[ApiBase::PARAM_TYPE] = 'integer';
 482                                                 }
 483                                         }
 484                                         if ( isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 485                                                 $type = $settings[ApiBase::PARAM_TYPE];
 486                                                 $multi = !empty( $settings[ApiBase::PARAM_ISMULTI] );
 487                                                 $hintPipeSeparated = true;
 488                                                 $count = ApiBase::LIMIT_SML2 + 1;
 489
 490                                                 if ( is_array( $type ) ) {
 491                                                         $count = count( $type );
 492                                                         $deprecatedValues = isset( $settings[ApiBase::PARAM_DEPRECATED_VALUES] )
 493                                                                 ? $settings[ApiBase::PARAM_DEPRECATED_VALUES]
 494                                                                 : [];
 495                                                         $links = isset( $settings[ApiBase::PARAM_VALUE_LINKS] )
 496                                                                 ? $settings[ApiBase::PARAM_VALUE_LINKS]
 497                                                                 : [];
 498                                                         $values = array_map( function ( $v ) use ( $links, $deprecatedValues ) {
 499                                                                 $attr = [];
 500                                                                 if ( $v !== '' ) {
 501                                                                         // We can't know whether this contains LTR or RTL text.
 502                                                                         $attr['dir'] = 'auto';
 503                                                                 }
 504                                                                 if ( isset( $deprecatedValues[$v] ) ) {
 505                                                                         $attr['class'] = 'apihelp-deprecated-value';
 506                                                                 }
 507                                                                 $ret = $attr ? Html::element( 'span', $attr, $v ) : $v;
 508                                                                 if ( isset( $links[$v] ) ) {
 509                                                                         $ret = "[[{$links[$v]}|$ret]]";
 510                                                                 }
 511                                                                 return $ret;
 512                                                         }, $type );
 513                                                         $i = array_search( '', $type, true );
 514                                                         if ( $i === false ) {
 515                                                                 $values = $context->getLanguage()->commaList( $values );
 516                                                         } else {
 517                                                                 unset( $values[$i] );
 518                                                                 $values = $context->msg( 'api-help-param-list-can-be-empty' )
 519                                                                         ->numParams( count( $values ) )
 520                                                                         ->params( $context->getLanguage()->commaList( $values ) )
 521                                                                         ->parse();
 522                                                         }
 523                                                         $info[] = $context->msg( 'api-help-param-list' )
 524                                                                 ->params( $multi ? 2 : 1 )
 525                                                                 ->params( $values )
 526                                                                 ->parse();
 527                                                         $hintPipeSeparated = false;
 528                                                 } else {
 529                                                         switch ( $type ) {
 530                                                                 case 'submodule':
 531                                                                         $groups[] = $name;
 532
 533                                                                         if ( isset( $settings[ApiBase::PARAM_SUBMODULE_MAP] ) ) {
 534                                                                                 $map = $settings[ApiBase::PARAM_SUBMODULE_MAP];
 535                                                                                 $defaultAttrs = [];
 536                                                                         } else {
 537                                                                                 $prefix = $module->isMain() ? '' : ( $module->getModulePath() . '+' );
 538                                                                                 $map = [];
 539                                                                                 foreach ( $module->getModuleManager()->getNames( $name ) as $submoduleName ) {
 540                                                                                         $map[$submoduleName] = $prefix . $submoduleName;
 541                                                                                 }
 542                                                                                 $defaultAttrs = [ 'dir' => 'ltr', 'lang' => 'en' ];
 543                                                                         }
 544                                                                         ksort( $map );
 545
 546                                                                         $submodules = [];
 547                                                                         $deprecatedSubmodules = [];
 548                                                                         foreach ( $map as $v => $m ) {
 549                                                                                 $attrs = $defaultAttrs;
 550                                                                                 $arr = &$submodules;
 551                                                                                 try {
 552                                                                                         $submod = $module->getModuleFromPath( $m );
 553                                                                                         if ( $submod ) {
 554                                                                                                 if ( $submod->isDeprecated() ) {
 555                                                                                                         $arr = &$deprecatedSubmodules;
 556                                                                                                         $attrs['class'] = 'apihelp-deprecated-value';
 557                                                                                                 }
 558                                                                                         }
 559                                                                                 } catch ( ApiUsageException $ex ) {
 560                                                                                         // Ignore
 561                                                                                 }
 562                                                                                 if ( $attrs ) {
 563                                                                                         $v = Html::element( 'span', $attrs, $v );
 564                                                                                 }
 565                                                                                 $arr[] = "[[Special:ApiHelp/{$m}|{$v}]]";
 566                                                                         }
 567                                                                         $submodules = array_merge( $submodules, $deprecatedSubmodules );
 568                                                                         $count = count( $submodules );
 569                                                                         $info[] = $context->msg( 'api-help-param-list' )
 570                                                                                 ->params( $multi ? 2 : 1 )
 571                                                                                 ->params( $context->getLanguage()->commaList( $submodules ) )
 572                                                                                 ->parse();
 573                                                                         $hintPipeSeparated = false;
 574                                                                         // No type message necessary, we have a list of values.
 575                                                                         $type = null;
 576                                                                         break;
 577
 578                                                                 case 'namespace':
 579                                                                         $namespaces = MWNamespace::getValidNamespaces();
 580                                                                         if ( isset( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] ) &&
 581                                                                                 is_array( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] )
 582                                                                         ) {
 583                                                                                 $namespaces = array_merge( $namespaces, $settings[ApiBase::PARAM_EXTRA_NAMESPACES] );
 584                                                                         }
 585                                                                         sort( $namespaces );
 586                                                                         $count = count( $namespaces );
 587                                                                         $info[] = $context->msg( 'api-help-param-list' )
 588                                                                                 ->params( $multi ? 2 : 1 )
 589                                                                                 ->params( $context->getLanguage()->commaList( $namespaces ) )
 590                                                                                 ->parse();
 591                                                                         $hintPipeSeparated = false;
 592                                                                         // No type message necessary, we have a list of values.
 593                                                                         $type = null;
 594                                                                         break;
 595
 596                                                                 case 'tags':
 597                                                                         $tags = ChangeTags::listExplicitlyDefinedTags();
 598                                                                         $count = count( $tags );
 599                                                                         $info[] = $context->msg( 'api-help-param-list' )
 600                                                                                 ->params( $multi ? 2 : 1 )
 601                                                                                 ->params( $context->getLanguage()->commaList( $tags ) )
 602                                                                                 ->parse();
 603                                                                         $hintPipeSeparated = false;
 604                                                                         $type = null;
 605                                                                         break;
 606
 607                                                                 case 'limit':
 608                                                                         if ( isset( $settings[ApiBase::PARAM_MAX2] ) ) {
 609                                                                                 $info[] = $context->msg( 'api-help-param-limit2' )
 610                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 611                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX2] )
 612                                                                                         ->parse();
 613                                                                         } else {
 614                                                                                 $info[] = $context->msg( 'api-help-param-limit' )
 615                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 616                                                                                         ->parse();
 617                                                                         }
 618                                                                         break;
 619
 620                                                                 case 'integer':
 621                                                                         // Possible messages:
 622                                                                         // api-help-param-integer-min,
 623                                                                         // api-help-param-integer-max,
 624                                                                         // api-help-param-integer-minmax
 625                                                                         $suffix = '';
 626                                                                         $min = $max = 0;
 627                                                                         if ( isset( $settings[ApiBase::PARAM_MIN] ) ) {
 628                                                                                 $suffix .= 'min';
 629                                                                                 $min = $settings[ApiBase::PARAM_MIN];
 630                                                                         }
 631                                                                         if ( isset( $settings[ApiBase::PARAM_MAX] ) ) {
 632                                                                                 $suffix .= 'max';
 633                                                                                 $max = $settings[ApiBase::PARAM_MAX];
 634                                                                         }
 635                                                                         if ( $suffix !== '' ) {
 636                                                                                 $info[] =
 637                                                                                         $context->msg( "api-help-param-integer-$suffix" )
 638                                                                                                 ->params( $multi ? 2 : 1 )
 639                                                                                                 ->numParams( $min, $max )
 640                                                                                                 ->parse();
 641                                                                         }
 642                                                                         break;
 643
 644                                                                 case 'upload':
 645                                                                         $info[] = $context->msg( 'api-help-param-upload' )
 646                                                                                 ->parse();
 647                                                                         // No type message necessary, api-help-param-upload should handle it.
 648                                                                         $type = null;
 649                                                                         break;
 650
 651                                                                 case 'string':
 652                                                                 case 'text':
 653                                                                         // Displaying a type message here would be useless.
 654                                                                         $type = null;
 655                                                                         break;
 656                                                         }
 657                                                 }
 658
 659                                                 // Add type. Messages for grep: api-help-param-type-limit
 660                                                 // api-help-param-type-integer api-help-param-type-boolean
 661                                                 // api-help-param-type-timestamp api-help-param-type-user
 662                                                 // api-help-param-type-password
 663                                                 if ( is_string( $type ) ) {
 664                                                         $msg = $context->msg( "api-help-param-type-$type" );
 665                                                         if ( !$msg->isDisabled() ) {
 666                                                                 $info[] = $msg->params( $multi ? 2 : 1 )->parse();
 667                                                         }
 668                                                 }
 669
 670                                                 if ( $multi ) {
 671                                                         $extra = [];
 672                                                         if ( $hintPipeSeparated ) {
 673                                                                 $extra[] = $context->msg( 'api-help-param-multi-separate' )->parse();
 674                                                         }
 675                                                         if ( $count > ApiBase::LIMIT_SML1 ) {
 676                                                                 $extra[] = $context->msg( 'api-help-param-multi-max' )
 677                                                                         ->numParams( ApiBase::LIMIT_SML1, ApiBase::LIMIT_SML2 )
 678                                                                         ->parse();
 679                                                         }
 680                                                         if ( $extra ) {
 681                                                                 $info[] = implode( ' ', $extra );
 682                                                         }
 683
 684                                                         $allowAll = isset( $settings[ApiBase::PARAM_ALL] )
 685                                                                 ? $settings[ApiBase::PARAM_ALL]
 686                                                                 : false;
 687                                                         if ( $allowAll || $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 688                                                                 if ( $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 689                                                                         $allSpecifier = ApiBase::ALL_DEFAULT_STRING;
 690                                                                 } else {
 691                                                                         $allSpecifier = ( is_string( $allowAll ) ? $allowAll : ApiBase::ALL_DEFAULT_STRING );
 692                                                                 }
 693                                                                 $info[] = $context->msg( 'api-help-param-multi-all' )
 694                                                                         ->params( $allSpecifier )
 695                                                                         ->parse();
 696                                                         }
 697                                                 }
 698                                         }
 699
 700                                         // Add default
 701                                         $default = isset( $settings[ApiBase::PARAM_DFLT] )
 702                                                 ? $settings[ApiBase::PARAM_DFLT]
 703                                                 : null;
 704                                         if ( $default === '' ) {
 705                                                 $info[] = $context->msg( 'api-help-param-default-empty' )
 706                                                         ->parse();
 707                                         } elseif ( $default !== null && $default !== false ) {
 708                                                 // We can't know whether this contains LTR or RTL text.
 709                                                 $info[] = $context->msg( 'api-help-param-default' )
 710                                                         ->params( Html::element( 'span', [ 'dir' => 'auto' ], $default ) )
 711                                                         ->parse();
 712                                         }
 713
 714                                         if ( !array_filter( $description ) ) {
 715                                                 $description = [ self::wrap(
 716                                                         $context->msg( 'api-help-param-no-description' ),
 717                                                         'apihelp-empty'
 718                                                 ) ];
 719                                         }
 720
 721                                         // Add "deprecated" flag
 722                                         if ( !empty( $settings[ApiBase::PARAM_DEPRECATED] ) ) {
 723                                                 $help['parameters'] .= Html::openElement( 'dd',
 724                                                         [ 'class' => 'info' ] );
 725                                                 $help['parameters'] .= self::wrap(
 726                                                         $context->msg( 'api-help-param-deprecated' ),
 727                                                         'apihelp-deprecated', 'strong'
 728                                                 );
 729                                                 $help['parameters'] .= Html::closeElement( 'dd' );
 730                                         }
 731
 732                                         if ( $description ) {
 733                                                 $description = implode( '', $description );
 734                                                 $description = preg_replace( '!\s*</([oud]l)>\s*<\1>\s*!', "\n", $description );
 735                                                 $help['parameters'] .= Html::rawElement( 'dd',
 736                                                         [ 'class' => 'description' ], $description );
 737                                         }
 738
 739                                         foreach ( $info as $i ) {
 740                                                 $help['parameters'] .= Html::rawElement( 'dd', [ 'class' => 'info' ], $i );
 741                                         }
 742                                 }
 743
 744                                 if ( $dynamicParams !== null ) {
 745                                         $dynamicParams = ApiBase::makeMessage( $dynamicParams, $context, [
 746                                                 $module->getModulePrefix(),
 747                                                 $module->getModuleName(),
 748                                                 $module->getModulePath()
 749                                         ] );
 750                                         $help['parameters'] .= Html::element( 'dt', null, '*' );
 751                                         $help['parameters'] .= Html::rawElement( 'dd',
 752                                                 [ 'class' => 'description' ], $dynamicParams->parse() );
 753                                 }
 754
 755                                 $help['parameters'] .= Html::closeElement( 'dl' );
 756                                 $help['parameters'] .= Html::closeElement( 'div' );
 757                         }
 758
 759                         $examples = $module->getExamplesMessages();
 760                         if ( $examples ) {
 761                                 $help['examples'] .= Html::openElement( 'div',
 762                                         [ 'class' => 'apihelp-block apihelp-examples' ] );
 763                                 $msg = $context->msg( 'api-help-examples' );
 764                                 if ( !$msg->isDisabled() ) {
 765                                         $help['examples'] .= self::wrap(
 766                                                 $msg->numParams( count( $examples ) ), 'apihelp-block-head', 'div'
 767                                         );
 768                                 }
 769
 770                                 $help['examples'] .= Html::openElement( 'dl' );
 771                                 foreach ( $examples as $qs => $msg ) {
 772                                         $msg = ApiBase::makeMessage( $msg, $context, [
 773                                                 $module->getModulePrefix(),
 774                                                 $module->getModuleName(),
 775                                                 $module->getModulePath()
 776                                         ] );
 777
 778                                         $link = wfAppendQuery( wfScript( 'api' ), $qs );
 779                                         $sandbox = SpecialPage::getTitleFor( 'ApiSandbox' )->getLocalURL() . '#' . $qs;
 780                                         $help['examples'] .= Html::rawElement( 'dt', null, $msg->parse() );
 781                                         $help['examples'] .= Html::rawElement( 'dd', null,
 782                                                 Html::element( 'a', [ 'href' => $link, 'dir' => 'ltr' ], "api.php?$qs" ) . ' ' .
 783                                                 Html::rawElement( 'a', [ 'href' => $sandbox ],
 784                                                         $context->msg( 'api-help-open-in-apisandbox' )->parse() )
 785                                         );
 786                                 }
 787                                 $help['examples'] .= Html::closeElement( 'dl' );
 788                                 $help['examples'] .= Html::closeElement( 'div' );
 789                         }
 790
 791                         $subtocnumber = $tocnumber;
 792                         $subtocnumber[$level + 1] = 0;
 793                         $suboptions = [
 794                                 'submodules' => $options['recursivesubmodules'],
 795                                 'headerlevel' => $level + 1,
 796                                 'tocnumber' => &$subtocnumber,
 797                                 'noheader' => false,
 798                         ] + $options;
 799
 800                         if ( $options['submodules'] && $module->getModuleManager() ) {
 801                                 $manager = $module->getModuleManager();
 802                                 $submodules = [];
 803                                 foreach ( $groups as $group ) {
 804                                         $names = $manager->getNames( $group );
 805                                         sort( $names );
 806                                         foreach ( $names as $name ) {
 807                                                 $submodules[] = $manager->getModule( $name );
 808                                         }
 809                                 }
 810                                 $help['submodules'] .= self::getHelpInternal(
 811                                         $context,
 812                                         $submodules,
 813                                         $suboptions,
 814                                         $haveModules
 815                                 );
 816                         }
 817
 818                         $module->modifyHelp( $help, $suboptions, $haveModules );
 819
 820                         Hooks::run( 'APIHelpModifyOutput', [ $module, &$help, $suboptions, &$haveModules ] );
 821
 822                         $out .= implode( "\n", $help );
 823                 }
 824
 825                 return $out;
 826         }
 827
 828         public function shouldCheckMaxlag() {
 829                 return false;
 830         }
 831
 832         public function isReadMode() {
 833                 return false;
 834         }
 835
 836         public function getCustomPrinter() {
 837                 $params = $this->extractRequestParams();
 838                 if ( $params['wrap'] ) {
 839                         return null;
 840                 }
 841
 842                 $main = $this->getMain();
 843                 $errorPrinter = $main->createPrinterByName( $main->getParameter( 'format' ) );
 844                 return new ApiFormatRaw( $main, $errorPrinter );
 845         }
 846
 847         public function getAllowedParams() {
 848                 return [
 849                         'modules' => [
 850                                 ApiBase::PARAM_DFLT => 'main',
 851                                 ApiBase::PARAM_ISMULTI => true,
 852                         ],
 853                         'submodules' => false,
 854                         'recursivesubmodules' => false,
 855                         'wrap' => false,
 856                         'toc' => false,
 857                 ];
 858         }
 859
 860         protected function getExamplesMessages() {
 861                 return [
 862                         'action=help'
 863                                 => 'apihelp-help-example-main',
 864                         'action=help&modules=query&submodules=1'
 865                                 => 'apihelp-help-example-submodules',
 866                         'action=help&recursivesubmodules=1'
 867                                 => 'apihelp-help-example-recursive',
 868                         'action=help&modules=help'
 869                                 => 'apihelp-help-example-help',
 870                         'action=help&modules=query+info|query+categorymembers'
 871                                 => 'apihelp-help-example-query',
 872                 ];
 873         }
 874
 875         public function getHelpUrls() {
 876                 return [
 877                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Main_page',
 878                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:FAQ',
 879                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Quick_start_guide',
 880                 ];
 881         }
 882 }