includes/api/ApiHelp.php

   1 <?php
   2 /**
   3  * Copyright © 2014 Wikimedia Foundation and contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use HtmlFormatter\HtmlFormatter;
  24 use MediaWiki\MediaWikiServices;
  25
  26 /**
  27  * Class to output help for an API module
  28  *
  29  * @since 1.25 completely rewritten
  30  * @ingroup API
  31  */
  32 class ApiHelp extends ApiBase {
  33         public function execute() {
  34                 $params = $this->extractRequestParams();
  35                 $modules = [];
  36
  37                 foreach ( $params['modules'] as $path ) {
  38                         $modules[] = $this->getModuleFromPath( $path );
  39                 }
  40
  41                 // Get the help
  42                 $context = new DerivativeContext( $this->getMain()->getContext() );
  43                 $skinFactory = MediaWikiServices::getInstance()->getSkinFactory();
  44                 $context->setSkin( $skinFactory->makeSkin( 'apioutput' ) );
  45                 $context->setLanguage( $this->getMain()->getLanguage() );
  46                 $context->setTitle( SpecialPage::getTitleFor( 'ApiHelp' ) );
  47                 $out = new OutputPage( $context );
  48                 $out->setRobotPolicy( 'noindex,nofollow' );
  49                 $out->setCopyrightUrl( 'https://www.mediawiki.org/wiki/Special:MyLanguage/Copyright' );
  50                 $context->setOutput( $out );
  51
  52                 self::getHelp( $context, $modules, $params );
  53
  54                 // Grab the output from the skin
  55                 ob_start();
  56                 $context->getOutput()->output();
  57                 $html = ob_get_clean();
  58
  59                 $result = $this->getResult();
  60                 if ( $params['wrap'] ) {
  61                         $data = [
  62                                 'mime' => 'text/html',
  63                                 'filename' => 'api-help.html',
  64                                 'help' => $html,
  65                         ];
  66                         ApiResult::setSubelementsList( $data, 'help' );
  67                         $result->addValue( null, $this->getModuleName(), $data );
  68                 } else {
  69                         $result->reset();
  70                         $result->addValue( null, 'text', $html, ApiResult::NO_SIZE_CHECK );
  71                         $result->addValue( null, 'mime', 'text/html', ApiResult::NO_SIZE_CHECK );
  72                         $result->addValue( null, 'filename', 'api-help.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                 if ( !is_array( $modules ) ) {
  97                         $modules = [ $modules ];
  98                 }
  99
 100                 $out = $context->getOutput();
 101                 $out->addModuleStyles( [
 102                         'mediawiki.hlist',
 103                         'mediawiki.apihelp',
 104                 ] );
 105                 if ( !empty( $options['toc'] ) ) {
 106                         $out->addModuleStyles( 'mediawiki.toc.styles' );
 107                 }
 108                 $out->setPageTitle( $context->msg( 'api-help-title' ) );
 109
 110                 $services = MediaWikiServices::getInstance();
 111                 $cache = $services->getMainWANObjectCache();
 112                 $cacheKey = null;
 113                 if ( count( $modules ) == 1 && $modules[0] instanceof ApiMain &&
 114                         $options['recursivesubmodules'] &&
 115                         $context->getLanguage()->equals( $services->getContentLanguage() )
 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 = $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                                         // Templated?
 472                                         if ( !empty( $settings[ApiBase::PARAM_TEMPLATE_VARS] ) ) {
 473                                                 $vars = [];
 474                                                 $msg = 'api-help-param-templated-var-first';
 475                                                 foreach ( $settings[ApiBase::PARAM_TEMPLATE_VARS] as $k => $v ) {
 476                                                         $vars[] = $context->msg( $msg, $k, $module->encodeParamName( $v ) );
 477                                                         $msg = 'api-help-param-templated-var';
 478                                                 }
 479                                                 $info[] = $context->msg( 'api-help-param-templated' )
 480                                                         ->numParams( count( $vars ) )
 481                                                         ->params( Message::listParam( $vars ) )
 482                                                         ->parse();
 483                                         }
 484
 485                                         // Type documentation
 486                                         if ( !isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 487                                                 $dflt = $settings[ApiBase::PARAM_DFLT] ?? null;
 488                                                 if ( is_bool( $dflt ) ) {
 489                                                         $settings[ApiBase::PARAM_TYPE] = 'boolean';
 490                                                 } elseif ( is_string( $dflt ) || is_null( $dflt ) ) {
 491                                                         $settings[ApiBase::PARAM_TYPE] = 'string';
 492                                                 } elseif ( is_int( $dflt ) ) {
 493                                                         $settings[ApiBase::PARAM_TYPE] = 'integer';
 494                                                 }
 495                                         }
 496                                         if ( isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 497                                                 $type = $settings[ApiBase::PARAM_TYPE];
 498                                                 $multi = !empty( $settings[ApiBase::PARAM_ISMULTI] );
 499                                                 $hintPipeSeparated = true;
 500                                                 $count = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT2] )
 501                                                         ? $settings[ApiBase::PARAM_ISMULTI_LIMIT2] + 1
 502                                                         : ApiBase::LIMIT_SML2 + 1;
 503
 504                                                 if ( is_array( $type ) ) {
 505                                                         $count = count( $type );
 506                                                         $deprecatedValues = $settings[ApiBase::PARAM_DEPRECATED_VALUES] ?? [];
 507                                                         $links = $settings[ApiBase::PARAM_VALUE_LINKS] ?? [];
 508                                                         $values = array_map( function ( $v ) use ( $links, $deprecatedValues ) {
 509                                                                 $attr = [];
 510                                                                 if ( $v !== '' ) {
 511                                                                         // We can't know whether this contains LTR or RTL text.
 512                                                                         $attr['dir'] = 'auto';
 513                                                                 }
 514                                                                 if ( isset( $deprecatedValues[$v] ) ) {
 515                                                                         $attr['class'] = 'apihelp-deprecated-value';
 516                                                                 }
 517                                                                 $ret = $attr ? Html::element( 'span', $attr, $v ) : $v;
 518                                                                 if ( isset( $links[$v] ) ) {
 519                                                                         $ret = "[[{$links[$v]}|$ret]]";
 520                                                                 }
 521                                                                 return $ret;
 522                                                         }, $type );
 523                                                         $i = array_search( '', $type, true );
 524                                                         if ( $i === false ) {
 525                                                                 $values = $context->getLanguage()->commaList( $values );
 526                                                         } else {
 527                                                                 unset( $values[$i] );
 528                                                                 $values = $context->msg( 'api-help-param-list-can-be-empty' )
 529                                                                         ->numParams( count( $values ) )
 530                                                                         ->params( $context->getLanguage()->commaList( $values ) )
 531                                                                         ->parse();
 532                                                         }
 533                                                         $info[] = $context->msg( 'api-help-param-list' )
 534                                                                 ->params( $multi ? 2 : 1 )
 535                                                                 ->params( $values )
 536                                                                 ->parse();
 537                                                         $hintPipeSeparated = false;
 538                                                 } else {
 539                                                         switch ( $type ) {
 540                                                                 case 'submodule':
 541                                                                         $groups[] = $name;
 542
 543                                                                         if ( isset( $settings[ApiBase::PARAM_SUBMODULE_MAP] ) ) {
 544                                                                                 $map = $settings[ApiBase::PARAM_SUBMODULE_MAP];
 545                                                                                 $defaultAttrs = [];
 546                                                                         } else {
 547                                                                                 $prefix = $module->isMain() ? '' : ( $module->getModulePath() . '+' );
 548                                                                                 $map = [];
 549                                                                                 foreach ( $module->getModuleManager()->getNames( $name ) as $submoduleName ) {
 550                                                                                         $map[$submoduleName] = $prefix . $submoduleName;
 551                                                                                 }
 552                                                                                 $defaultAttrs = [ 'dir' => 'ltr', 'lang' => 'en' ];
 553                                                                         }
 554                                                                         ksort( $map );
 555
 556                                                                         $submodules = [];
 557                                                                         $deprecatedSubmodules = [];
 558                                                                         foreach ( $map as $v => $m ) {
 559                                                                                 $attrs = $defaultAttrs;
 560                                                                                 $arr = &$submodules;
 561                                                                                 try {
 562                                                                                         $submod = $module->getModuleFromPath( $m );
 563                                                                                         if ( $submod && $submod->isDeprecated() ) {
 564                                                                                                 $arr = &$deprecatedSubmodules;
 565                                                                                                 $attrs['class'] = 'apihelp-deprecated-value';
 566                                                                                         }
 567                                                                                 } catch ( ApiUsageException $ex ) {
 568                                                                                         // Ignore
 569                                                                                 }
 570                                                                                 if ( $attrs ) {
 571                                                                                         $v = Html::element( 'span', $attrs, $v );
 572                                                                                 }
 573                                                                                 $arr[] = "[[Special:ApiHelp/{$m}|{$v}]]";
 574                                                                         }
 575                                                                         $submodules = array_merge( $submodules, $deprecatedSubmodules );
 576                                                                         $count = count( $submodules );
 577                                                                         $info[] = $context->msg( 'api-help-param-list' )
 578                                                                                 ->params( $multi ? 2 : 1 )
 579                                                                                 ->params( $context->getLanguage()->commaList( $submodules ) )
 580                                                                                 ->parse();
 581                                                                         $hintPipeSeparated = false;
 582                                                                         // No type message necessary, we have a list of values.
 583                                                                         $type = null;
 584                                                                         break;
 585
 586                                                                 case 'namespace':
 587                                                                         $namespaces = MediaWikiServices::getInstance()->
 588                                                                                 getNamespaceInfo()->getValidNamespaces();
 589                                                                         if ( isset( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] ) &&
 590                                                                                 is_array( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] )
 591                                                                         ) {
 592                                                                                 $namespaces = array_merge( $namespaces, $settings[ApiBase::PARAM_EXTRA_NAMESPACES] );
 593                                                                         }
 594                                                                         sort( $namespaces );
 595                                                                         $count = count( $namespaces );
 596                                                                         $info[] = $context->msg( 'api-help-param-list' )
 597                                                                                 ->params( $multi ? 2 : 1 )
 598                                                                                 ->params( $context->getLanguage()->commaList( $namespaces ) )
 599                                                                                 ->parse();
 600                                                                         $hintPipeSeparated = false;
 601                                                                         // No type message necessary, we have a list of values.
 602                                                                         $type = null;
 603                                                                         break;
 604
 605                                                                 case 'tags':
 606                                                                         $tags = ChangeTags::listExplicitlyDefinedTags();
 607                                                                         $count = count( $tags );
 608                                                                         $info[] = $context->msg( 'api-help-param-list' )
 609                                                                                 ->params( $multi ? 2 : 1 )
 610                                                                                 ->params( $context->getLanguage()->commaList( $tags ) )
 611                                                                                 ->parse();
 612                                                                         $hintPipeSeparated = false;
 613                                                                         $type = null;
 614                                                                         break;
 615
 616                                                                 case 'limit':
 617                                                                         if ( isset( $settings[ApiBase::PARAM_MAX2] ) ) {
 618                                                                                 $info[] = $context->msg( 'api-help-param-limit2' )
 619                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 620                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX2] )
 621                                                                                         ->parse();
 622                                                                         } else {
 623                                                                                 $info[] = $context->msg( 'api-help-param-limit' )
 624                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 625                                                                                         ->parse();
 626                                                                         }
 627                                                                         break;
 628
 629                                                                 case 'integer':
 630                                                                         // Possible messages:
 631                                                                         // api-help-param-integer-min,
 632                                                                         // api-help-param-integer-max,
 633                                                                         // api-help-param-integer-minmax
 634                                                                         $suffix = '';
 635                                                                         $min = $max = 0;
 636                                                                         if ( isset( $settings[ApiBase::PARAM_MIN] ) ) {
 637                                                                                 $suffix .= 'min';
 638                                                                                 $min = $settings[ApiBase::PARAM_MIN];
 639                                                                         }
 640                                                                         if ( isset( $settings[ApiBase::PARAM_MAX] ) ) {
 641                                                                                 $suffix .= 'max';
 642                                                                                 $max = $settings[ApiBase::PARAM_MAX];
 643                                                                         }
 644                                                                         if ( $suffix !== '' ) {
 645                                                                                 $info[] =
 646                                                                                         $context->msg( "api-help-param-integer-$suffix" )
 647                                                                                                 ->params( $multi ? 2 : 1 )
 648                                                                                                 ->numParams( $min, $max )
 649                                                                                                 ->parse();
 650                                                                         }
 651                                                                         break;
 652
 653                                                                 case 'upload':
 654                                                                         $info[] = $context->msg( 'api-help-param-upload' )
 655                                                                                 ->parse();
 656                                                                         // No type message necessary, api-help-param-upload should handle it.
 657                                                                         $type = null;
 658                                                                         break;
 659
 660                                                                 case 'string':
 661                                                                 case 'text':
 662                                                                         // Displaying a type message here would be useless.
 663                                                                         $type = null;
 664                                                                         break;
 665                                                         }
 666                                                 }
 667
 668                                                 // Add type. Messages for grep: api-help-param-type-limit
 669                                                 // api-help-param-type-integer api-help-param-type-boolean
 670                                                 // api-help-param-type-timestamp api-help-param-type-user
 671                                                 // api-help-param-type-password
 672                                                 if ( is_string( $type ) ) {
 673                                                         $msg = $context->msg( "api-help-param-type-$type" );
 674                                                         if ( !$msg->isDisabled() ) {
 675                                                                 $info[] = $msg->params( $multi ? 2 : 1 )->parse();
 676                                                         }
 677                                                 }
 678
 679                                                 if ( $multi ) {
 680                                                         $extra = [];
 681                                                         $lowcount = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT1] )
 682                                                                 ? $settings[ApiBase::PARAM_ISMULTI_LIMIT1]
 683                                                                 : ApiBase::LIMIT_SML1;
 684                                                         $highcount = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT2] )
 685                                                                 ? $settings[ApiBase::PARAM_ISMULTI_LIMIT2]
 686                                                                 : ApiBase::LIMIT_SML2;
 687
 688                                                         if ( $hintPipeSeparated ) {
 689                                                                 $extra[] = $context->msg( 'api-help-param-multi-separate' )->parse();
 690                                                         }
 691                                                         if ( $count > $lowcount ) {
 692                                                                 if ( $lowcount === $highcount ) {
 693                                                                         $msg = $context->msg( 'api-help-param-multi-max-simple' )
 694                                                                                 ->numParams( $lowcount );
 695                                                                 } else {
 696                                                                         $msg = $context->msg( 'api-help-param-multi-max' )
 697                                                                                 ->numParams( $lowcount, $highcount );
 698                                                                 }
 699                                                                 $extra[] = $msg->parse();
 700                                                         }
 701                                                         if ( $extra ) {
 702                                                                 $info[] = implode( ' ', $extra );
 703                                                         }
 704
 705                                                         $allowAll = $settings[ApiBase::PARAM_ALL] ?? false;
 706                                                         if ( $allowAll || $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 707                                                                 if ( $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 708                                                                         $allSpecifier = ApiBase::ALL_DEFAULT_STRING;
 709                                                                 } else {
 710                                                                         $allSpecifier = ( is_string( $allowAll ) ? $allowAll : ApiBase::ALL_DEFAULT_STRING );
 711                                                                 }
 712                                                                 $info[] = $context->msg( 'api-help-param-multi-all' )
 713                                                                         ->params( $allSpecifier )
 714                                                                         ->parse();
 715                                                         }
 716                                                 }
 717                                         }
 718
 719                                         if ( isset( $settings[self::PARAM_MAX_BYTES] ) ) {
 720                                                 $info[] = $context->msg( 'api-help-param-maxbytes' )
 721                                                         ->numParams( $settings[self::PARAM_MAX_BYTES] );
 722                                         }
 723                                         if ( isset( $settings[self::PARAM_MAX_CHARS] ) ) {
 724                                                 $info[] = $context->msg( 'api-help-param-maxchars' )
 725                                                         ->numParams( $settings[self::PARAM_MAX_CHARS] );
 726                                         }
 727
 728                                         // Add default
 729                                         $default = $settings[ApiBase::PARAM_DFLT] ?? null;
 730                                         if ( $default === '' ) {
 731                                                 $info[] = $context->msg( 'api-help-param-default-empty' )
 732                                                         ->parse();
 733                                         } elseif ( $default !== null && $default !== false ) {
 734                                                 // We can't know whether this contains LTR or RTL text.
 735                                                 $info[] = $context->msg( 'api-help-param-default' )
 736                                                         ->params( Html::element( 'span', [ 'dir' => 'auto' ], $default ) )
 737                                                         ->parse();
 738                                         }
 739
 740                                         if ( !array_filter( $description ) ) {
 741                                                 $description = [ self::wrap(
 742                                                         $context->msg( 'api-help-param-no-description' ),
 743                                                         'apihelp-empty'
 744                                                 ) ];
 745                                         }
 746
 747                                         // Add "deprecated" flag
 748                                         if ( !empty( $settings[ApiBase::PARAM_DEPRECATED] ) ) {
 749                                                 $help['parameters'] .= Html::openElement( 'dd',
 750                                                         [ 'class' => 'info' ] );
 751                                                 $help['parameters'] .= self::wrap(
 752                                                         $context->msg( 'api-help-param-deprecated' ),
 753                                                         'apihelp-deprecated', 'strong'
 754                                                 );
 755                                                 $help['parameters'] .= Html::closeElement( 'dd' );
 756                                         }
 757
 758                                         if ( $description ) {
 759                                                 $description = implode( '', $description );
 760                                                 $description = preg_replace( '!\s*</([oud]l)>\s*<\1>\s*!', "\n", $description );
 761                                                 $help['parameters'] .= Html::rawElement( 'dd',
 762                                                         [ 'class' => 'description' ], $description );
 763                                         }
 764
 765                                         foreach ( $info as $i ) {
 766                                                 $help['parameters'] .= Html::rawElement( 'dd', [ 'class' => 'info' ], $i );
 767                                         }
 768                                 }
 769
 770                                 if ( $dynamicParams !== null ) {
 771                                         $dynamicParams = ApiBase::makeMessage( $dynamicParams, $context, [
 772                                                 $module->getModulePrefix(),
 773                                                 $module->getModuleName(),
 774                                                 $module->getModulePath()
 775                                         ] );
 776                                         $help['parameters'] .= Html::element( 'dt', null, '*' );
 777                                         $help['parameters'] .= Html::rawElement( 'dd',
 778                                                 [ 'class' => 'description' ], $dynamicParams->parse() );
 779                                 }
 780
 781                                 $help['parameters'] .= Html::closeElement( 'dl' );
 782                                 $help['parameters'] .= Html::closeElement( 'div' );
 783                         }
 784
 785                         $examples = $module->getExamplesMessages();
 786                         if ( $examples ) {
 787                                 $help['examples'] .= Html::openElement( 'div',
 788                                         [ 'class' => 'apihelp-block apihelp-examples' ] );
 789                                 $msg = $context->msg( 'api-help-examples' );
 790                                 if ( !$msg->isDisabled() ) {
 791                                         $help['examples'] .= self::wrap(
 792                                                 $msg->numParams( count( $examples ) ), 'apihelp-block-head', 'div'
 793                                         );
 794                                 }
 795
 796                                 $help['examples'] .= Html::openElement( 'dl' );
 797                                 foreach ( $examples as $qs => $msg ) {
 798                                         $msg = ApiBase::makeMessage( $msg, $context, [
 799                                                 $module->getModulePrefix(),
 800                                                 $module->getModuleName(),
 801                                                 $module->getModulePath()
 802                                         ] );
 803
 804                                         $link = wfAppendQuery( wfScript( 'api' ), $qs );
 805                                         $sandbox = SpecialPage::getTitleFor( 'ApiSandbox' )->getLocalURL() . '#' . $qs;
 806                                         $help['examples'] .= Html::rawElement( 'dt', null, $msg->parse() );
 807                                         $help['examples'] .= Html::rawElement( 'dd', null,
 808                                                 Html::element( 'a', [ 'href' => $link, 'dir' => 'ltr' ], "api.php?$qs" ) . ' ' .
 809                                                 Html::rawElement( 'a', [ 'href' => $sandbox ],
 810                                                         $context->msg( 'api-help-open-in-apisandbox' )->parse() )
 811                                         );
 812                                 }
 813                                 $help['examples'] .= Html::closeElement( 'dl' );
 814                                 $help['examples'] .= Html::closeElement( 'div' );
 815                         }
 816
 817                         $subtocnumber = $tocnumber;
 818                         $subtocnumber[$level + 1] = 0;
 819                         $suboptions = [
 820                                 'submodules' => $options['recursivesubmodules'],
 821                                 'headerlevel' => $level + 1,
 822                                 'tocnumber' => &$subtocnumber,
 823                                 'noheader' => false,
 824                         ] + $options;
 825
 826                         if ( $options['submodules'] && $module->getModuleManager() ) {
 827                                 $manager = $module->getModuleManager();
 828                                 $submodules = [];
 829                                 foreach ( $groups as $group ) {
 830                                         $names = $manager->getNames( $group );
 831                                         sort( $names );
 832                                         foreach ( $names as $name ) {
 833                                                 $submodules[] = $manager->getModule( $name );
 834                                         }
 835                                 }
 836                                 $help['submodules'] .= self::getHelpInternal(
 837                                         $context,
 838                                         $submodules,
 839                                         $suboptions,
 840                                         $haveModules
 841                                 );
 842                         }
 843
 844                         $module->modifyHelp( $help, $suboptions, $haveModules );
 845
 846                         Hooks::run( 'APIHelpModifyOutput', [ $module, &$help, $suboptions, &$haveModules ] );
 847
 848                         $out .= implode( "\n", $help );
 849                 }
 850
 851                 return $out;
 852         }
 853
 854         public function shouldCheckMaxlag() {
 855                 return false;
 856         }
 857
 858         public function isReadMode() {
 859                 return false;
 860         }
 861
 862         public function getCustomPrinter() {
 863                 $params = $this->extractRequestParams();
 864                 if ( $params['wrap'] ) {
 865                         return null;
 866                 }
 867
 868                 $main = $this->getMain();
 869                 $errorPrinter = $main->createPrinterByName( $main->getParameter( 'format' ) );
 870                 return new ApiFormatRaw( $main, $errorPrinter );
 871         }
 872
 873         public function getAllowedParams() {
 874                 return [
 875                         'modules' => [
 876                                 ApiBase::PARAM_DFLT => 'main',
 877                                 ApiBase::PARAM_ISMULTI => true,
 878                         ],
 879                         'submodules' => false,
 880                         'recursivesubmodules' => false,
 881                         'wrap' => false,
 882                         'toc' => false,
 883                 ];
 884         }
 885
 886         protected function getExamplesMessages() {
 887                 return [
 888                         'action=help'
 889                                 => 'apihelp-help-example-main',
 890                         'action=help&modules=query&submodules=1'
 891                                 => 'apihelp-help-example-submodules',
 892                         'action=help&recursivesubmodules=1'
 893                                 => 'apihelp-help-example-recursive',
 894                         'action=help&modules=help'
 895                                 => 'apihelp-help-example-help',
 896                         'action=help&modules=query+info|query+categorymembers'
 897                                 => 'apihelp-help-example-query',
 898                 ];
 899         }
 900
 901         public function getHelpUrls() {
 902                 return [
 903                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Main_page',
 904                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:FAQ',
 905                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Quick_start_guide',
 906                 ];
 907         }
 908 }