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                 $context->setSkin( SkinFactory::getDefaultInstance()->makeSkin( 'apioutput' ) );
  44                 $context->setLanguage( $this->getMain()->getLanguage() );
  45                 $context->setTitle( SpecialPage::getTitleFor( 'ApiHelp' ) );
  46                 $out = new OutputPage( $context );
  47                 $out->setCopyrightUrl( 'https://www.mediawiki.org/wiki/Special:MyLanguage/Copyright' );
  48                 $context->setOutput( $out );
  49
  50                 self::getHelp( $context, $modules, $params );
  51
  52                 // Grab the output from the skin
  53                 ob_start();
  54                 $context->getOutput()->output();
  55                 $html = ob_get_clean();
  56
  57                 $result = $this->getResult();
  58                 if ( $params['wrap'] ) {
  59                         $data = [
  60                                 'mime' => 'text/html',
  61                                 'filename' => 'api-help.html',
  62                                 'help' => $html,
  63                         ];
  64                         ApiResult::setSubelementsList( $data, 'help' );
  65                         $result->addValue( null, $this->getModuleName(), $data );
  66                 } else {
  67                         $result->reset();
  68                         $result->addValue( null, 'text', $html, ApiResult::NO_SIZE_CHECK );
  69                         $result->addValue( null, 'mime', 'text/html', ApiResult::NO_SIZE_CHECK );
  70                         $result->addValue( null, 'filename', 'api-help.html', ApiResult::NO_SIZE_CHECK );
  71                 }
  72         }
  73
  74         /**
  75          * Generate help for the specified modules
  76          *
  77          * Help is placed into the OutputPage object returned by
  78          * $context->getOutput().
  79          *
  80          * Recognized options include:
  81          *  - headerlevel: (int) Header tag level
  82          *  - nolead: (bool) Skip the inclusion of api-help-lead
  83          *  - noheader: (bool) Skip the inclusion of the top-level section headers
  84          *  - submodules: (bool) Include help for submodules of the current module
  85          *  - recursivesubmodules: (bool) Include help for submodules recursively
  86          *  - helptitle: (string) Title to link for additional modules' help. Should contain $1.
  87          *  - toc: (bool) Include a table of contents
  88          *
  89          * @param IContextSource $context
  90          * @param ApiBase[]|ApiBase $modules
  91          * @param array $options Formatting options (described above)
  92          */
  93         public static function getHelp( IContextSource $context, $modules, array $options ) {
  94                 global $wgContLang;
  95
  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->addModules( 'mediawiki.toc' );
 107                 }
 108                 $out->setPageTitle( $context->msg( 'api-help-title' ) );
 109
 110                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 111                 $cacheKey = null;
 112                 if ( count( $modules ) == 1 && $modules[0] instanceof ApiMain &&
 113                         $options['recursivesubmodules'] && $context->getLanguage() === $wgContLang
 114                 ) {
 115                         $cacheHelpTimeout = $context->getConfig()->get( 'APICacheHelpTimeout' );
 116                         if ( $cacheHelpTimeout > 0 ) {
 117                                 // Get help text from cache if present
 118                                 $cacheKey = $cache->makeKey( 'apihelp', $modules[0]->getModulePath(),
 119                                         (int)!empty( $options['toc'] ),
 120                                         str_replace( ' ', '_', SpecialVersion::getVersion( 'nodb' ) ) );
 121                                 $cached = $cache->get( $cacheKey );
 122                                 if ( $cached ) {
 123                                         $out->addHTML( $cached );
 124                                         return;
 125                                 }
 126                         }
 127                 }
 128                 if ( $out->getHTML() !== '' ) {
 129                         // Don't save to cache, there's someone else's content in the page
 130                         // already
 131                         $cacheKey = null;
 132                 }
 133
 134                 $options['recursivesubmodules'] = !empty( $options['recursivesubmodules'] );
 135                 $options['submodules'] = $options['recursivesubmodules'] || !empty( $options['submodules'] );
 136
 137                 // Prepend lead
 138                 if ( empty( $options['nolead'] ) ) {
 139                         $msg = $context->msg( 'api-help-lead' );
 140                         if ( !$msg->isDisabled() ) {
 141                                 $out->addHTML( $msg->parseAsBlock() );
 142                         }
 143                 }
 144
 145                 $haveModules = [];
 146                 $html = self::getHelpInternal( $context, $modules, $options, $haveModules );
 147                 if ( !empty( $options['toc'] ) && $haveModules ) {
 148                         $out->addHTML( Linker::generateTOC( $haveModules, $context->getLanguage() ) );
 149                 }
 150                 $out->addHTML( $html );
 151
 152                 $helptitle = $options['helptitle'] ?? null;
 153                 $html = self::fixHelpLinks( $out->getHTML(), $helptitle, $haveModules );
 154                 $out->clearHTML();
 155                 $out->addHTML( $html );
 156
 157                 if ( $cacheKey !== null ) {
 158                         $cache->set( $cacheKey, $out->getHTML(), $cacheHelpTimeout );
 159                 }
 160         }
 161
 162         /**
 163          * Replace Special:ApiHelp links with links to api.php
 164          *
 165          * @param string $html
 166          * @param string|null $helptitle Title to link to rather than api.php, must contain '$1'
 167          * @param array $localModules Keys are modules to link within the current page, values are ignored
 168          * @return string
 169          */
 170         public static function fixHelpLinks( $html, $helptitle = null, $localModules = [] ) {
 171                 $formatter = new HtmlFormatter( $html );
 172                 $doc = $formatter->getDoc();
 173                 $xpath = new DOMXPath( $doc );
 174                 $nodes = $xpath->query( '//a[@href][not(contains(@class,\'apihelp-linktrail\'))]' );
 175                 foreach ( $nodes as $node ) {
 176                         $href = $node->getAttribute( 'href' );
 177                         do {
 178                                 $old = $href;
 179                                 $href = rawurldecode( $href );
 180                         } while ( $old !== $href );
 181                         if ( preg_match( '!Special:ApiHelp/([^&/|#]+)((?:#.*)?)!', $href, $m ) ) {
 182                                 if ( isset( $localModules[$m[1]] ) ) {
 183                                         $href = $m[2] === '' ? '#' . $m[1] : $m[2];
 184                                 } elseif ( $helptitle !== null ) {
 185                                         $href = Title::newFromText( str_replace( '$1', $m[1], $helptitle ) . $m[2] )
 186                                                 ->getFullURL();
 187                                 } else {
 188                                         $href = wfAppendQuery( wfScript( 'api' ), [
 189                                                 'action' => 'help',
 190                                                 'modules' => $m[1],
 191                                         ] ) . $m[2];
 192                                 }
 193                                 $node->setAttribute( 'href', $href );
 194                                 $node->removeAttribute( 'title' );
 195                         }
 196                 }
 197
 198                 return $formatter->getText();
 199         }
 200
 201         /**
 202          * Wrap a message in HTML with a class.
 203          *
 204          * @param Message $msg
 205          * @param string $class
 206          * @param string $tag
 207          * @return string
 208          */
 209         private static function wrap( Message $msg, $class, $tag = 'span' ) {
 210                 return Html::rawElement( $tag, [ 'class' => $class ],
 211                         $msg->parse()
 212                 );
 213         }
 214
 215         /**
 216          * Recursively-called function to actually construct the help
 217          *
 218          * @param IContextSource $context
 219          * @param ApiBase[] $modules
 220          * @param array $options
 221          * @param array &$haveModules
 222          * @return string
 223          */
 224         private static function getHelpInternal( IContextSource $context, array $modules,
 225                 array $options, &$haveModules
 226         ) {
 227                 $out = '';
 228
 229                 $level = empty( $options['headerlevel'] ) ? 2 : $options['headerlevel'];
 230                 if ( empty( $options['tocnumber'] ) ) {
 231                         $tocnumber = [ 2 => 0 ];
 232                 } else {
 233                         $tocnumber = &$options['tocnumber'];
 234                 }
 235
 236                 foreach ( $modules as $module ) {
 237                         $tocnumber[$level]++;
 238                         $path = $module->getModulePath();
 239                         $module->setContext( $context );
 240                         $help = [
 241                                 'header' => '',
 242                                 'flags' => '',
 243                                 'description' => '',
 244                                 'help-urls' => '',
 245                                 'parameters' => '',
 246                                 'examples' => '',
 247                                 'submodules' => '',
 248                         ];
 249
 250                         if ( empty( $options['noheader'] ) || !empty( $options['toc'] ) ) {
 251                                 $anchor = $path;
 252                                 $i = 1;
 253                                 while ( isset( $haveModules[$anchor] ) ) {
 254                                         $anchor = $path . '|' . ++$i;
 255                                 }
 256
 257                                 if ( $module->isMain() ) {
 258                                         $headerContent = $context->msg( 'api-help-main-header' )->parse();
 259                                         $headerAttr = [
 260                                                 'class' => 'apihelp-header',
 261                                         ];
 262                                 } else {
 263                                         $name = $module->getModuleName();
 264                                         $headerContent = $module->getParent()->getModuleManager()->getModuleGroup( $name ) .
 265                                                 "=$name";
 266                                         if ( $module->getModulePrefix() !== '' ) {
 267                                                 $headerContent .= ' ' .
 268                                                         $context->msg( 'parentheses', $module->getModulePrefix() )->parse();
 269                                         }
 270                                         // Module names are always in English and not localized,
 271                                         // so English language and direction must be set explicitly,
 272                                         // otherwise parentheses will get broken in RTL wikis
 273                                         $headerAttr = [
 274                                                 'class' => 'apihelp-header apihelp-module-name',
 275                                                 'dir' => 'ltr',
 276                                                 'lang' => 'en',
 277                                         ];
 278                                 }
 279
 280                                 $headerAttr['id'] = $anchor;
 281
 282                                 $haveModules[$anchor] = [
 283                                         'toclevel' => count( $tocnumber ),
 284                                         'level' => $level,
 285                                         'anchor' => $anchor,
 286                                         'line' => $headerContent,
 287                                         'number' => implode( '.', $tocnumber ),
 288                                         'index' => false,
 289                                 ];
 290                                 if ( empty( $options['noheader'] ) ) {
 291                                         $help['header'] .= Html::element(
 292                                                 'h' . min( 6, $level ),
 293                                                 $headerAttr,
 294                                                 $headerContent
 295                                         );
 296                                 }
 297                         } else {
 298                                 $haveModules[$path] = true;
 299                         }
 300
 301                         $links = [];
 302                         $any = false;
 303                         for ( $m = $module; $m !== null; $m = $m->getParent() ) {
 304                                 $name = $m->getModuleName();
 305                                 if ( $name === 'main_int' ) {
 306                                         $name = 'main';
 307                                 }
 308
 309                                 if ( count( $modules ) === 1 && $m === $modules[0] &&
 310                                         !( !empty( $options['submodules'] ) && $m->getModuleManager() )
 311                                 ) {
 312                                         $link = Html::element( 'b', [ 'dir' => 'ltr', 'lang' => 'en' ], $name );
 313                                 } else {
 314                                         $link = SpecialPage::getTitleFor( 'ApiHelp', $m->getModulePath() )->getLocalURL();
 315                                         $link = Html::element( 'a',
 316                                                 [ 'href' => $link, 'class' => 'apihelp-linktrail', 'dir' => 'ltr', 'lang' => 'en' ],
 317                                                 $name
 318                                         );
 319                                         $any = true;
 320                                 }
 321                                 array_unshift( $links, $link );
 322                         }
 323                         if ( $any ) {
 324                                 $help['header'] .= self::wrap(
 325                                         $context->msg( 'parentheses' )
 326                                                 ->rawParams( $context->getLanguage()->pipeList( $links ) ),
 327                                         'apihelp-linktrail', 'div'
 328                                 );
 329                         }
 330
 331                         $flags = $module->getHelpFlags();
 332                         $help['flags'] .= Html::openElement( 'div',
 333                                 [ 'class' => 'apihelp-block apihelp-flags' ] );
 334                         $msg = $context->msg( 'api-help-flags' );
 335                         if ( !$msg->isDisabled() ) {
 336                                 $help['flags'] .= self::wrap(
 337                                         $msg->numParams( count( $flags ) ), 'apihelp-block-head', 'div'
 338                                 );
 339                         }
 340                         $help['flags'] .= Html::openElement( 'ul' );
 341                         foreach ( $flags as $flag ) {
 342                                 $help['flags'] .= Html::rawElement( 'li', null,
 343                                         self::wrap( $context->msg( "api-help-flag-$flag" ), "apihelp-flag-$flag" )
 344                                 );
 345                         }
 346                         $sourceInfo = $module->getModuleSourceInfo();
 347                         if ( $sourceInfo ) {
 348                                 if ( isset( $sourceInfo['namemsg'] ) ) {
 349                                         $extname = $context->msg( $sourceInfo['namemsg'] )->text();
 350                                 } else {
 351                                         // Probably English, so wrap it.
 352                                         $extname = Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $sourceInfo['name'] );
 353                                 }
 354                                 $help['flags'] .= Html::rawElement( 'li', null,
 355                                         self::wrap(
 356                                                 $context->msg( 'api-help-source', $extname, $sourceInfo['name'] ),
 357                                                 'apihelp-source'
 358                                         )
 359                                 );
 360
 361                                 $link = SpecialPage::getTitleFor( 'Version', 'License/' . $sourceInfo['name'] );
 362                                 if ( isset( $sourceInfo['license-name'] ) ) {
 363                                         $msg = $context->msg( 'api-help-license', $link,
 364                                                 Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $sourceInfo['license-name'] )
 365                                         );
 366                                 } elseif ( SpecialVersion::getExtLicenseFileName( dirname( $sourceInfo['path'] ) ) ) {
 367                                         $msg = $context->msg( 'api-help-license-noname', $link );
 368                                 } else {
 369                                         $msg = $context->msg( 'api-help-license-unknown' );
 370                                 }
 371                                 $help['flags'] .= Html::rawElement( 'li', null,
 372                                         self::wrap( $msg, 'apihelp-license' )
 373                                 );
 374                         } else {
 375                                 $help['flags'] .= Html::rawElement( 'li', null,
 376                                         self::wrap( $context->msg( 'api-help-source-unknown' ), 'apihelp-source' )
 377                                 );
 378                                 $help['flags'] .= Html::rawElement( 'li', null,
 379                                         self::wrap( $context->msg( 'api-help-license-unknown' ), 'apihelp-license' )
 380                                 );
 381                         }
 382                         $help['flags'] .= Html::closeElement( 'ul' );
 383                         $help['flags'] .= Html::closeElement( 'div' );
 384
 385                         foreach ( $module->getFinalDescription() as $msg ) {
 386                                 $msg->setContext( $context );
 387                                 $help['description'] .= $msg->parseAsBlock();
 388                         }
 389
 390                         $urls = $module->getHelpUrls();
 391                         if ( $urls ) {
 392                                 $help['help-urls'] .= Html::openElement( 'div',
 393                                         [ 'class' => 'apihelp-block apihelp-help-urls' ]
 394                                 );
 395                                 $msg = $context->msg( 'api-help-help-urls' );
 396                                 if ( !$msg->isDisabled() ) {
 397                                         $help['help-urls'] .= self::wrap(
 398                                                 $msg->numParams( count( $urls ) ), 'apihelp-block-head', 'div'
 399                                         );
 400                                 }
 401                                 if ( !is_array( $urls ) ) {
 402                                         $urls = [ $urls ];
 403                                 }
 404                                 $help['help-urls'] .= Html::openElement( 'ul' );
 405                                 foreach ( $urls as $url ) {
 406                                         $help['help-urls'] .= Html::rawElement( 'li', null,
 407                                                 Html::element( 'a', [ 'href' => $url, 'dir' => 'ltr' ], $url )
 408                                         );
 409                                 }
 410                                 $help['help-urls'] .= Html::closeElement( 'ul' );
 411                                 $help['help-urls'] .= Html::closeElement( 'div' );
 412                         }
 413
 414                         $params = $module->getFinalParams( ApiBase::GET_VALUES_FOR_HELP );
 415                         $dynamicParams = $module->dynamicParameterDocumentation();
 416                         $groups = [];
 417                         if ( $params || $dynamicParams !== null ) {
 418                                 $help['parameters'] .= Html::openElement( 'div',
 419                                         [ 'class' => 'apihelp-block apihelp-parameters' ]
 420                                 );
 421                                 $msg = $context->msg( 'api-help-parameters' );
 422                                 if ( !$msg->isDisabled() ) {
 423                                         $help['parameters'] .= self::wrap(
 424                                                 $msg->numParams( count( $params ) ), 'apihelp-block-head', 'div'
 425                                         );
 426                                 }
 427                                 $help['parameters'] .= Html::openElement( 'dl' );
 428
 429                                 $descriptions = $module->getFinalParamDescription();
 430
 431                                 foreach ( $params as $name => $settings ) {
 432                                         if ( !is_array( $settings ) ) {
 433                                                 $settings = [ ApiBase::PARAM_DFLT => $settings ];
 434                                         }
 435
 436                                         $help['parameters'] .= Html::rawElement( 'dt', null,
 437                                                 Html::element( 'span', [ 'dir' => 'ltr', 'lang' => 'en' ], $module->encodeParamName( $name ) )
 438                                         );
 439
 440                                         // Add description
 441                                         $description = [];
 442                                         if ( isset( $descriptions[$name] ) ) {
 443                                                 foreach ( $descriptions[$name] as $msg ) {
 444                                                         $msg->setContext( $context );
 445                                                         $description[] = $msg->parseAsBlock();
 446                                                 }
 447                                         }
 448
 449                                         // Add usage info
 450                                         $info = [];
 451
 452                                         // Required?
 453                                         if ( !empty( $settings[ApiBase::PARAM_REQUIRED] ) ) {
 454                                                 $info[] = $context->msg( 'api-help-param-required' )->parse();
 455                                         }
 456
 457                                         // Custom info?
 458                                         if ( !empty( $settings[ApiBase::PARAM_HELP_MSG_INFO] ) ) {
 459                                                 foreach ( $settings[ApiBase::PARAM_HELP_MSG_INFO] as $i ) {
 460                                                         $tag = array_shift( $i );
 461                                                         $info[] = $context->msg( "apihelp-{$path}-paraminfo-{$tag}" )
 462                                                                 ->numParams( count( $i ) )
 463                                                                 ->params( $context->getLanguage()->commaList( $i ) )
 464                                                                 ->params( $module->getModulePrefix() )
 465                                                                 ->parse();
 466                                                 }
 467                                         }
 468
 469                                         // Templated?
 470                                         if ( !empty( $settings[ApiBase::PARAM_TEMPLATE_VARS] ) ) {
 471                                                 $vars = [];
 472                                                 $msg = 'api-help-param-templated-var-first';
 473                                                 foreach ( $settings[ApiBase::PARAM_TEMPLATE_VARS] as $k => $v ) {
 474                                                         $vars[] = $context->msg( $msg, $k, $module->encodeParamName( $v ) );
 475                                                         $msg = 'api-help-param-templated-var';
 476                                                 }
 477                                                 $info[] = $context->msg( 'api-help-param-templated' )
 478                                                         ->numParams( count( $vars ) )
 479                                                         ->params( Message::listParam( $vars ) )
 480                                                         ->parse();
 481                                         }
 482
 483                                         // Type documentation
 484                                         if ( !isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 485                                                 $dflt = $settings[ApiBase::PARAM_DFLT] ?? null;
 486                                                 if ( is_bool( $dflt ) ) {
 487                                                         $settings[ApiBase::PARAM_TYPE] = 'boolean';
 488                                                 } elseif ( is_string( $dflt ) || is_null( $dflt ) ) {
 489                                                         $settings[ApiBase::PARAM_TYPE] = 'string';
 490                                                 } elseif ( is_int( $dflt ) ) {
 491                                                         $settings[ApiBase::PARAM_TYPE] = 'integer';
 492                                                 }
 493                                         }
 494                                         if ( isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 495                                                 $type = $settings[ApiBase::PARAM_TYPE];
 496                                                 $multi = !empty( $settings[ApiBase::PARAM_ISMULTI] );
 497                                                 $hintPipeSeparated = true;
 498                                                 $count = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT2] )
 499                                                         ? $settings[ApiBase::PARAM_ISMULTI_LIMIT2] + 1
 500                                                         : ApiBase::LIMIT_SML2 + 1;
 501
 502                                                 if ( is_array( $type ) ) {
 503                                                         $count = count( $type );
 504                                                         $deprecatedValues = $settings[ApiBase::PARAM_DEPRECATED_VALUES] ?? [];
 505                                                         $links = $settings[ApiBase::PARAM_VALUE_LINKS] ?? [];
 506                                                         $values = array_map( function ( $v ) use ( $links, $deprecatedValues ) {
 507                                                                 $attr = [];
 508                                                                 if ( $v !== '' ) {
 509                                                                         // We can't know whether this contains LTR or RTL text.
 510                                                                         $attr['dir'] = 'auto';
 511                                                                 }
 512                                                                 if ( isset( $deprecatedValues[$v] ) ) {
 513                                                                         $attr['class'] = 'apihelp-deprecated-value';
 514                                                                 }
 515                                                                 $ret = $attr ? Html::element( 'span', $attr, $v ) : $v;
 516                                                                 if ( isset( $links[$v] ) ) {
 517                                                                         $ret = "[[{$links[$v]}|$ret]]";
 518                                                                 }
 519                                                                 return $ret;
 520                                                         }, $type );
 521                                                         $i = array_search( '', $type, true );
 522                                                         if ( $i === false ) {
 523                                                                 $values = $context->getLanguage()->commaList( $values );
 524                                                         } else {
 525                                                                 unset( $values[$i] );
 526                                                                 $values = $context->msg( 'api-help-param-list-can-be-empty' )
 527                                                                         ->numParams( count( $values ) )
 528                                                                         ->params( $context->getLanguage()->commaList( $values ) )
 529                                                                         ->parse();
 530                                                         }
 531                                                         $info[] = $context->msg( 'api-help-param-list' )
 532                                                                 ->params( $multi ? 2 : 1 )
 533                                                                 ->params( $values )
 534                                                                 ->parse();
 535                                                         $hintPipeSeparated = false;
 536                                                 } else {
 537                                                         switch ( $type ) {
 538                                                                 case 'submodule':
 539                                                                         $groups[] = $name;
 540
 541                                                                         if ( isset( $settings[ApiBase::PARAM_SUBMODULE_MAP] ) ) {
 542                                                                                 $map = $settings[ApiBase::PARAM_SUBMODULE_MAP];
 543                                                                                 $defaultAttrs = [];
 544                                                                         } else {
 545                                                                                 $prefix = $module->isMain() ? '' : ( $module->getModulePath() . '+' );
 546                                                                                 $map = [];
 547                                                                                 foreach ( $module->getModuleManager()->getNames( $name ) as $submoduleName ) {
 548                                                                                         $map[$submoduleName] = $prefix . $submoduleName;
 549                                                                                 }
 550                                                                                 $defaultAttrs = [ 'dir' => 'ltr', 'lang' => 'en' ];
 551                                                                         }
 552                                                                         ksort( $map );
 553
 554                                                                         $submodules = [];
 555                                                                         $deprecatedSubmodules = [];
 556                                                                         foreach ( $map as $v => $m ) {
 557                                                                                 $attrs = $defaultAttrs;
 558                                                                                 $arr = &$submodules;
 559                                                                                 try {
 560                                                                                         $submod = $module->getModuleFromPath( $m );
 561                                                                                         if ( $submod ) {
 562                                                                                                 if ( $submod->isDeprecated() ) {
 563                                                                                                         $arr = &$deprecatedSubmodules;
 564                                                                                                         $attrs['class'] = 'apihelp-deprecated-value';
 565                                                                                                 }
 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 = MWNamespace::getValidNamespaces();
 588                                                                         if ( isset( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] ) &&
 589                                                                                 is_array( $settings[ApiBase::PARAM_EXTRA_NAMESPACES] )
 590                                                                         ) {
 591                                                                                 $namespaces = array_merge( $namespaces, $settings[ApiBase::PARAM_EXTRA_NAMESPACES] );
 592                                                                         }
 593                                                                         sort( $namespaces );
 594                                                                         $count = count( $namespaces );
 595                                                                         $info[] = $context->msg( 'api-help-param-list' )
 596                                                                                 ->params( $multi ? 2 : 1 )
 597                                                                                 ->params( $context->getLanguage()->commaList( $namespaces ) )
 598                                                                                 ->parse();
 599                                                                         $hintPipeSeparated = false;
 600                                                                         // No type message necessary, we have a list of values.
 601                                                                         $type = null;
 602                                                                         break;
 603
 604                                                                 case 'tags':
 605                                                                         $tags = ChangeTags::listExplicitlyDefinedTags();
 606                                                                         $count = count( $tags );
 607                                                                         $info[] = $context->msg( 'api-help-param-list' )
 608                                                                                 ->params( $multi ? 2 : 1 )
 609                                                                                 ->params( $context->getLanguage()->commaList( $tags ) )
 610                                                                                 ->parse();
 611                                                                         $hintPipeSeparated = false;
 612                                                                         $type = null;
 613                                                                         break;
 614
 615                                                                 case 'limit':
 616                                                                         if ( isset( $settings[ApiBase::PARAM_MAX2] ) ) {
 617                                                                                 $info[] = $context->msg( 'api-help-param-limit2' )
 618                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 619                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX2] )
 620                                                                                         ->parse();
 621                                                                         } else {
 622                                                                                 $info[] = $context->msg( 'api-help-param-limit' )
 623                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 624                                                                                         ->parse();
 625                                                                         }
 626                                                                         break;
 627
 628                                                                 case 'integer':
 629                                                                         // Possible messages:
 630                                                                         // api-help-param-integer-min,
 631                                                                         // api-help-param-integer-max,
 632                                                                         // api-help-param-integer-minmax
 633                                                                         $suffix = '';
 634                                                                         $min = $max = 0;
 635                                                                         if ( isset( $settings[ApiBase::PARAM_MIN] ) ) {
 636                                                                                 $suffix .= 'min';
 637                                                                                 $min = $settings[ApiBase::PARAM_MIN];
 638                                                                         }
 639                                                                         if ( isset( $settings[ApiBase::PARAM_MAX] ) ) {
 640                                                                                 $suffix .= 'max';
 641                                                                                 $max = $settings[ApiBase::PARAM_MAX];
 642                                                                         }
 643                                                                         if ( $suffix !== '' ) {
 644                                                                                 $info[] =
 645                                                                                         $context->msg( "api-help-param-integer-$suffix" )
 646                                                                                                 ->params( $multi ? 2 : 1 )
 647                                                                                                 ->numParams( $min, $max )
 648                                                                                                 ->parse();
 649                                                                         }
 650                                                                         break;
 651
 652                                                                 case 'upload':
 653                                                                         $info[] = $context->msg( 'api-help-param-upload' )
 654                                                                                 ->parse();
 655                                                                         // No type message necessary, api-help-param-upload should handle it.
 656                                                                         $type = null;
 657                                                                         break;
 658
 659                                                                 case 'string':
 660                                                                 case 'text':
 661                                                                         // Displaying a type message here would be useless.
 662                                                                         $type = null;
 663                                                                         break;
 664                                                         }
 665                                                 }
 666
 667                                                 // Add type. Messages for grep: api-help-param-type-limit
 668                                                 // api-help-param-type-integer api-help-param-type-boolean
 669                                                 // api-help-param-type-timestamp api-help-param-type-user
 670                                                 // api-help-param-type-password
 671                                                 if ( is_string( $type ) ) {
 672                                                         $msg = $context->msg( "api-help-param-type-$type" );
 673                                                         if ( !$msg->isDisabled() ) {
 674                                                                 $info[] = $msg->params( $multi ? 2 : 1 )->parse();
 675                                                         }
 676                                                 }
 677
 678                                                 if ( $multi ) {
 679                                                         $extra = [];
 680                                                         $lowcount = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT1] )
 681                                                                 ? $settings[ApiBase::PARAM_ISMULTI_LIMIT1]
 682                                                                 : ApiBase::LIMIT_SML1;
 683                                                         $highcount = !empty( $settings[ApiBase::PARAM_ISMULTI_LIMIT2] )
 684                                                                 ? $settings[ApiBase::PARAM_ISMULTI_LIMIT2]
 685                                                                 : ApiBase::LIMIT_SML2;
 686
 687                                                         if ( $hintPipeSeparated ) {
 688                                                                 $extra[] = $context->msg( 'api-help-param-multi-separate' )->parse();
 689                                                         }
 690                                                         if ( $count > $lowcount ) {
 691                                                                 if ( $lowcount === $highcount ) {
 692                                                                         $msg = $context->msg( 'api-help-param-multi-max-simple' )
 693                                                                                 ->numParams( $lowcount );
 694                                                                 } else {
 695                                                                         $msg = $context->msg( 'api-help-param-multi-max' )
 696                                                                                 ->numParams( $lowcount, $highcount );
 697                                                                 }
 698                                                                 $extra[] = $msg->parse();
 699                                                         }
 700                                                         if ( $extra ) {
 701                                                                 $info[] = implode( ' ', $extra );
 702                                                         }
 703
 704                                                         $allowAll = $settings[ApiBase::PARAM_ALL] ?? false;
 705                                                         if ( $allowAll || $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 706                                                                 if ( $settings[ApiBase::PARAM_TYPE] === 'namespace' ) {
 707                                                                         $allSpecifier = ApiBase::ALL_DEFAULT_STRING;
 708                                                                 } else {
 709                                                                         $allSpecifier = ( is_string( $allowAll ) ? $allowAll : ApiBase::ALL_DEFAULT_STRING );
 710                                                                 }
 711                                                                 $info[] = $context->msg( 'api-help-param-multi-all' )
 712                                                                         ->params( $allSpecifier )
 713                                                                         ->parse();
 714                                                         }
 715                                                 }
 716                                         }
 717
 718                                         if ( isset( $settings[self::PARAM_MAX_BYTES] ) ) {
 719                                                 $info[] = $context->msg( 'api-help-param-maxbytes' )
 720                                                         ->numParams( $settings[self::PARAM_MAX_BYTES] );
 721                                         }
 722                                         if ( isset( $settings[self::PARAM_MAX_CHARS] ) ) {
 723                                                 $info[] = $context->msg( 'api-help-param-maxchars' )
 724                                                         ->numParams( $settings[self::PARAM_MAX_CHARS] );
 725                                         }
 726
 727                                         // Add default
 728                                         $default = $settings[ApiBase::PARAM_DFLT] ?? null;
 729                                         if ( $default === '' ) {
 730                                                 $info[] = $context->msg( 'api-help-param-default-empty' )
 731                                                         ->parse();
 732                                         } elseif ( $default !== null && $default !== false ) {
 733                                                 // We can't know whether this contains LTR or RTL text.
 734                                                 $info[] = $context->msg( 'api-help-param-default' )
 735                                                         ->params( Html::element( 'span', [ 'dir' => 'auto' ], $default ) )
 736                                                         ->parse();
 737                                         }
 738
 739                                         if ( !array_filter( $description ) ) {
 740                                                 $description = [ self::wrap(
 741                                                         $context->msg( 'api-help-param-no-description' ),
 742                                                         'apihelp-empty'
 743                                                 ) ];
 744                                         }
 745
 746                                         // Add "deprecated" flag
 747                                         if ( !empty( $settings[ApiBase::PARAM_DEPRECATED] ) ) {
 748                                                 $help['parameters'] .= Html::openElement( 'dd',
 749                                                         [ 'class' => 'info' ] );
 750                                                 $help['parameters'] .= self::wrap(
 751                                                         $context->msg( 'api-help-param-deprecated' ),
 752                                                         'apihelp-deprecated', 'strong'
 753                                                 );
 754                                                 $help['parameters'] .= Html::closeElement( 'dd' );
 755                                         }
 756
 757                                         if ( $description ) {
 758                                                 $description = implode( '', $description );
 759                                                 $description = preg_replace( '!\s*</([oud]l)>\s*<\1>\s*!', "\n", $description );
 760                                                 $help['parameters'] .= Html::rawElement( 'dd',
 761                                                         [ 'class' => 'description' ], $description );
 762                                         }
 763
 764                                         foreach ( $info as $i ) {
 765                                                 $help['parameters'] .= Html::rawElement( 'dd', [ 'class' => 'info' ], $i );
 766                                         }
 767                                 }
 768
 769                                 if ( $dynamicParams !== null ) {
 770                                         $dynamicParams = ApiBase::makeMessage( $dynamicParams, $context, [
 771                                                 $module->getModulePrefix(),
 772                                                 $module->getModuleName(),
 773                                                 $module->getModulePath()
 774                                         ] );
 775                                         $help['parameters'] .= Html::element( 'dt', null, '*' );
 776                                         $help['parameters'] .= Html::rawElement( 'dd',
 777                                                 [ 'class' => 'description' ], $dynamicParams->parse() );
 778                                 }
 779
 780                                 $help['parameters'] .= Html::closeElement( 'dl' );
 781                                 $help['parameters'] .= Html::closeElement( 'div' );
 782                         }
 783
 784                         $examples = $module->getExamplesMessages();
 785                         if ( $examples ) {
 786                                 $help['examples'] .= Html::openElement( 'div',
 787                                         [ 'class' => 'apihelp-block apihelp-examples' ] );
 788                                 $msg = $context->msg( 'api-help-examples' );
 789                                 if ( !$msg->isDisabled() ) {
 790                                         $help['examples'] .= self::wrap(
 791                                                 $msg->numParams( count( $examples ) ), 'apihelp-block-head', 'div'
 792                                         );
 793                                 }
 794
 795                                 $help['examples'] .= Html::openElement( 'dl' );
 796                                 foreach ( $examples as $qs => $msg ) {
 797                                         $msg = ApiBase::makeMessage( $msg, $context, [
 798                                                 $module->getModulePrefix(),
 799                                                 $module->getModuleName(),
 800                                                 $module->getModulePath()
 801                                         ] );
 802
 803                                         $link = wfAppendQuery( wfScript( 'api' ), $qs );
 804                                         $sandbox = SpecialPage::getTitleFor( 'ApiSandbox' )->getLocalURL() . '#' . $qs;
 805                                         $help['examples'] .= Html::rawElement( 'dt', null, $msg->parse() );
 806                                         $help['examples'] .= Html::rawElement( 'dd', null,
 807                                                 Html::element( 'a', [ 'href' => $link, 'dir' => 'ltr' ], "api.php?$qs" ) . ' ' .
 808                                                 Html::rawElement( 'a', [ 'href' => $sandbox ],
 809                                                         $context->msg( 'api-help-open-in-apisandbox' )->parse() )
 810                                         );
 811                                 }
 812                                 $help['examples'] .= Html::closeElement( 'dl' );
 813                                 $help['examples'] .= Html::closeElement( 'div' );
 814                         }
 815
 816                         $subtocnumber = $tocnumber;
 817                         $subtocnumber[$level + 1] = 0;
 818                         $suboptions = [
 819                                 'submodules' => $options['recursivesubmodules'],
 820                                 'headerlevel' => $level + 1,
 821                                 'tocnumber' => &$subtocnumber,
 822                                 'noheader' => false,
 823                         ] + $options;
 824
 825                         if ( $options['submodules'] && $module->getModuleManager() ) {
 826                                 $manager = $module->getModuleManager();
 827                                 $submodules = [];
 828                                 foreach ( $groups as $group ) {
 829                                         $names = $manager->getNames( $group );
 830                                         sort( $names );
 831                                         foreach ( $names as $name ) {
 832                                                 $submodules[] = $manager->getModule( $name );
 833                                         }
 834                                 }
 835                                 $help['submodules'] .= self::getHelpInternal(
 836                                         $context,
 837                                         $submodules,
 838                                         $suboptions,
 839                                         $haveModules
 840                                 );
 841                         }
 842
 843                         $module->modifyHelp( $help, $suboptions, $haveModules );
 844
 845                         Hooks::run( 'APIHelpModifyOutput', [ $module, &$help, $suboptions, &$haveModules ] );
 846
 847                         $out .= implode( "\n", $help );
 848                 }
 849
 850                 return $out;
 851         }
 852
 853         public function shouldCheckMaxlag() {
 854                 return false;
 855         }
 856
 857         public function isReadMode() {
 858                 return false;
 859         }
 860
 861         public function getCustomPrinter() {
 862                 $params = $this->extractRequestParams();
 863                 if ( $params['wrap'] ) {
 864                         return null;
 865                 }
 866
 867                 $main = $this->getMain();
 868                 $errorPrinter = $main->createPrinterByName( $main->getParameter( 'format' ) );
 869                 return new ApiFormatRaw( $main, $errorPrinter );
 870         }
 871
 872         public function getAllowedParams() {
 873                 return [
 874                         'modules' => [
 875                                 ApiBase::PARAM_DFLT => 'main',
 876                                 ApiBase::PARAM_ISMULTI => true,
 877                         ],
 878                         'submodules' => false,
 879                         'recursivesubmodules' => false,
 880                         'wrap' => false,
 881                         'toc' => false,
 882                 ];
 883         }
 884
 885         protected function getExamplesMessages() {
 886                 return [
 887                         'action=help'
 888                                 => 'apihelp-help-example-main',
 889                         'action=help&modules=query&submodules=1'
 890                                 => 'apihelp-help-example-submodules',
 891                         'action=help&recursivesubmodules=1'
 892                                 => 'apihelp-help-example-recursive',
 893                         'action=help&modules=help'
 894                                 => 'apihelp-help-example-help',
 895                         'action=help&modules=query+info|query+categorymembers'
 896                                 => 'apihelp-help-example-query',
 897                 ];
 898         }
 899
 900         public function getHelpUrls() {
 901                 return [
 902                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Main_page',
 903                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:FAQ',
 904                         'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Quick_start_guide',
 905                 ];
 906         }
 907 }