includes/api/ApiHelp.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Aug 29, 2014
   6  *
   7  * Copyright © 2014 Brad Jorsch <bjorsch@wikimedia.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 use HtmlFormatter\HtmlFormatter;
  28
  29 /**
  30  * Class to output help for an API module
  31  *
  32  * @since 1.25 completely rewritten
  33  * @ingroup API
  34  */
  35 class ApiHelp extends ApiBase {
  36         public function execute() {
  37                 $params = $this->extractRequestParams();
  38                 $modules = [];
  39
  40                 foreach ( $params['modules'] as $path ) {
  41                         $modules[] = $this->getModuleFromPath( $path );
  42                 }
  43
  44                 // Get the help
  45                 $context = new DerivativeContext( $this->getMain()->getContext() );
  46                 $context->setSkin( SkinFactory::getDefaultInstance()->makeSkin( 'apioutput' ) );
  47                 $context->setLanguage( $this->getMain()->getLanguage() );
  48                 $context->setTitle( SpecialPage::getTitleFor( 'ApiHelp' ) );
  49                 $out = new OutputPage( $context );
  50                 $out->setCopyrightUrl( 'https://www.mediawiki.org/wiki/Special:MyLanguage/Copyright' );
  51                 $context->setOutput( $out );
  52
  53                 self::getHelp( $context, $modules, $params );
  54
  55                 // Grab the output from the skin
  56                 ob_start();
  57                 $context->getOutput()->output();
  58                 $html = ob_get_clean();
  59
  60                 $result = $this->getResult();
  61                 if ( $params['wrap'] ) {
  62                         $data = [
  63                                 'mime' => 'text/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                 }
  73         }
  74
  75         /**
  76          * Generate help for the specified modules
  77          *
  78          * Help is placed into the OutputPage object returned by
  79          * $context->getOutput().
  80          *
  81          * Recognized options include:
  82          *  - headerlevel: (int) Header tag level
  83          *  - nolead: (bool) Skip the inclusion of api-help-lead
  84          *  - noheader: (bool) Skip the inclusion of the top-level section headers
  85          *  - submodules: (bool) Include help for submodules of the current module
  86          *  - recursivesubmodules: (bool) Include help for submodules recursively
  87          *  - helptitle: (string) Title to link for additional modules' help. Should contain $1.
  88          *  - toc: (bool) Include a table of contents
  89          *
  90          * @param IContextSource $context
  91          * @param ApiBase[]|ApiBase $modules
  92          * @param array $options Formatting options (described above)
  93          * @return string
  94          */
  95         public static function getHelp( IContextSource $context, $modules, array $options ) {
  96                 global $wgContLang;
  97
  98                 if ( !is_array( $modules ) ) {
  99                         $modules = [ $modules ];
 100                 }
 101
 102                 $out = $context->getOutput();
 103                 $out->addModuleStyles( 'mediawiki.hlist' );
 104                 $out->addModuleStyles( 'mediawiki.apihelp' );
 105                 if ( !empty( $options['toc'] ) ) {
 106                         $out->addModules( 'mediawiki.toc' );
 107                 }
 108                 $out->setPageTitle( $context->msg( 'api-help-title' ) );
 109
 110                 $cache = ObjectCache::getMainWANInstance();
 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 = wfMemcKey( '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 = isset( $options['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                                         $header = $context->msg( 'api-help-main-header' )->parse();
 259                                 } else {
 260                                         $name = $module->getModuleName();
 261                                         $header = $module->getParent()->getModuleManager()->getModuleGroup( $name ) .
 262                                                 "=$name";
 263                                         if ( $module->getModulePrefix() !== '' ) {
 264                                                 $header .= ' ' .
 265                                                         $context->msg( 'parentheses', $module->getModulePrefix() )->parse();
 266                                         }
 267                                 }
 268                                 $haveModules[$anchor] = [
 269                                         'toclevel' => count( $tocnumber ),
 270                                         'level' => $level,
 271                                         'anchor' => $anchor,
 272                                         'line' => $header,
 273                                         'number' => implode( '.', $tocnumber ),
 274                                         'index' => false,
 275                                 ];
 276                                 if ( empty( $options['noheader'] ) ) {
 277                                         $help['header'] .= Html::element( 'h' . min( 6, $level ),
 278                                                 [ 'id' => $anchor, 'class' => 'apihelp-header' ],
 279                                                 $header
 280                                         );
 281                                 }
 282                         } else {
 283                                 $haveModules[$path] = true;
 284                         }
 285
 286                         $links = [];
 287                         $any = false;
 288                         for ( $m = $module; $m !== null; $m = $m->getParent() ) {
 289                                 $name = $m->getModuleName();
 290                                 if ( $name === 'main_int' ) {
 291                                         $name = 'main';
 292                                 }
 293
 294                                 if ( count( $modules ) === 1 && $m === $modules[0] &&
 295                                         !( !empty( $options['submodules'] ) && $m->getModuleManager() )
 296                                 ) {
 297                                         $link = Html::element( 'b', null, $name );
 298                                 } else {
 299                                         $link = SpecialPage::getTitleFor( 'ApiHelp', $m->getModulePath() )->getLocalURL();
 300                                         $link = Html::element( 'a',
 301                                                 [ 'href' => $link, 'class' => 'apihelp-linktrail' ],
 302                                                 $name
 303                                         );
 304                                         $any = true;
 305                                 }
 306                                 array_unshift( $links, $link );
 307                         }
 308                         if ( $any ) {
 309                                 $help['header'] .= self::wrap(
 310                                         $context->msg( 'parentheses' )
 311                                                 ->rawParams( $context->getLanguage()->pipeList( $links ) ),
 312                                         'apihelp-linktrail', 'div'
 313                                 );
 314                         }
 315
 316                         $flags = $module->getHelpFlags();
 317                         $help['flags'] .= Html::openElement( 'div',
 318                                 [ 'class' => 'apihelp-block apihelp-flags' ] );
 319                         $msg = $context->msg( 'api-help-flags' );
 320                         if ( !$msg->isDisabled() ) {
 321                                 $help['flags'] .= self::wrap(
 322                                         $msg->numParams( count( $flags ) ), 'apihelp-block-head', 'div'
 323                                 );
 324                         }
 325                         $help['flags'] .= Html::openElement( 'ul' );
 326                         foreach ( $flags as $flag ) {
 327                                 $help['flags'] .= Html::rawElement( 'li', null,
 328                                         self::wrap( $context->msg( "api-help-flag-$flag" ), "apihelp-flag-$flag" )
 329                                 );
 330                         }
 331                         $sourceInfo = $module->getModuleSourceInfo();
 332                         if ( $sourceInfo ) {
 333                                 if ( isset( $sourceInfo['namemsg'] ) ) {
 334                                         $extname = $context->msg( $sourceInfo['namemsg'] )->text();
 335                                 } else {
 336                                         $extname = $sourceInfo['name'];
 337                                 }
 338                                 $help['flags'] .= Html::rawElement( 'li', null,
 339                                         self::wrap(
 340                                                 $context->msg( 'api-help-source', $extname, $sourceInfo['name'] ),
 341                                                 'apihelp-source'
 342                                         )
 343                                 );
 344
 345                                 $link = SpecialPage::getTitleFor( 'Version', 'License/' . $sourceInfo['name'] );
 346                                 if ( isset( $sourceInfo['license-name'] ) ) {
 347                                         $msg = $context->msg( 'api-help-license', $link, $sourceInfo['license-name'] );
 348                                 } elseif ( SpecialVersion::getExtLicenseFileName( dirname( $sourceInfo['path'] ) ) ) {
 349                                         $msg = $context->msg( 'api-help-license-noname', $link );
 350                                 } else {
 351                                         $msg = $context->msg( 'api-help-license-unknown' );
 352                                 }
 353                                 $help['flags'] .= Html::rawElement( 'li', null,
 354                                         self::wrap( $msg, 'apihelp-license' )
 355                                 );
 356                         } else {
 357                                 $help['flags'] .= Html::rawElement( 'li', null,
 358                                         self::wrap( $context->msg( 'api-help-source-unknown' ), 'apihelp-source' )
 359                                 );
 360                                 $help['flags'] .= Html::rawElement( 'li', null,
 361                                         self::wrap( $context->msg( 'api-help-license-unknown' ), 'apihelp-license' )
 362                                 );
 363                         }
 364                         $help['flags'] .= Html::closeElement( 'ul' );
 365                         $help['flags'] .= Html::closeElement( 'div' );
 366
 367                         foreach ( $module->getFinalDescription() as $msg ) {
 368                                 $msg->setContext( $context );
 369                                 $help['description'] .= $msg->parseAsBlock();
 370                         }
 371
 372                         $urls = $module->getHelpUrls();
 373                         if ( $urls ) {
 374                                 $help['help-urls'] .= Html::openElement( 'div',
 375                                         [ 'class' => 'apihelp-block apihelp-help-urls' ]
 376                                 );
 377                                 $msg = $context->msg( 'api-help-help-urls' );
 378                                 if ( !$msg->isDisabled() ) {
 379                                         $help['help-urls'] .= self::wrap(
 380                                                 $msg->numParams( count( $urls ) ), 'apihelp-block-head', 'div'
 381                                         );
 382                                 }
 383                                 if ( !is_array( $urls ) ) {
 384                                         $urls = [ $urls ];
 385                                 }
 386                                 $help['help-urls'] .= Html::openElement( 'ul' );
 387                                 foreach ( $urls as $url ) {
 388                                         $help['help-urls'] .= Html::rawElement( 'li', null,
 389                                                 Html::element( 'a', [ 'href' => $url ], $url )
 390                                         );
 391                                 }
 392                                 $help['help-urls'] .= Html::closeElement( 'ul' );
 393                                 $help['help-urls'] .= Html::closeElement( 'div' );
 394                         }
 395
 396                         $params = $module->getFinalParams( ApiBase::GET_VALUES_FOR_HELP );
 397                         $dynamicParams = $module->dynamicParameterDocumentation();
 398                         $groups = [];
 399                         if ( $params || $dynamicParams !== null ) {
 400                                 $help['parameters'] .= Html::openElement( 'div',
 401                                         [ 'class' => 'apihelp-block apihelp-parameters' ]
 402                                 );
 403                                 $msg = $context->msg( 'api-help-parameters' );
 404                                 if ( !$msg->isDisabled() ) {
 405                                         $help['parameters'] .= self::wrap(
 406                                                 $msg->numParams( count( $params ) ), 'apihelp-block-head', 'div'
 407                                         );
 408                                 }
 409                                 $help['parameters'] .= Html::openElement( 'dl' );
 410
 411                                 $descriptions = $module->getFinalParamDescription();
 412
 413                                 foreach ( $params as $name => $settings ) {
 414                                         if ( !is_array( $settings ) ) {
 415                                                 $settings = [ ApiBase::PARAM_DFLT => $settings ];
 416                                         }
 417
 418                                         $help['parameters'] .= Html::element( 'dt', null,
 419                                                 $module->encodeParamName( $name ) );
 420
 421                                         // Add description
 422                                         $description = [];
 423                                         if ( isset( $descriptions[$name] ) ) {
 424                                                 foreach ( $descriptions[$name] as $msg ) {
 425                                                         $msg->setContext( $context );
 426                                                         $description[] = $msg->parseAsBlock();
 427                                                 }
 428                                         }
 429
 430                                         // Add usage info
 431                                         $info = [];
 432
 433                                         // Required?
 434                                         if ( !empty( $settings[ApiBase::PARAM_REQUIRED] ) ) {
 435                                                 $info[] = $context->msg( 'api-help-param-required' )->parse();
 436                                         }
 437
 438                                         // Custom info?
 439                                         if ( !empty( $settings[ApiBase::PARAM_HELP_MSG_INFO] ) ) {
 440                                                 foreach ( $settings[ApiBase::PARAM_HELP_MSG_INFO] as $i ) {
 441                                                         $tag = array_shift( $i );
 442                                                         $info[] = $context->msg( "apihelp-{$path}-paraminfo-{$tag}" )
 443                                                                 ->numParams( count( $i ) )
 444                                                                 ->params( $context->getLanguage()->commaList( $i ) )
 445                                                                 ->params( $module->getModulePrefix() )
 446                                                                 ->parse();
 447                                                 }
 448                                         }
 449
 450                                         // Type documentation
 451                                         if ( !isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 452                                                 $dflt = isset( $settings[ApiBase::PARAM_DFLT] )
 453                                                         ? $settings[ApiBase::PARAM_DFLT]
 454                                                         : null;
 455                                                 if ( is_bool( $dflt ) ) {
 456                                                         $settings[ApiBase::PARAM_TYPE] = 'boolean';
 457                                                 } elseif ( is_string( $dflt ) || is_null( $dflt ) ) {
 458                                                         $settings[ApiBase::PARAM_TYPE] = 'string';
 459                                                 } elseif ( is_int( $dflt ) ) {
 460                                                         $settings[ApiBase::PARAM_TYPE] = 'integer';
 461                                                 }
 462                                         }
 463                                         if ( isset( $settings[ApiBase::PARAM_TYPE] ) ) {
 464                                                 $type = $settings[ApiBase::PARAM_TYPE];
 465                                                 $multi = !empty( $settings[ApiBase::PARAM_ISMULTI] );
 466                                                 $hintPipeSeparated = true;
 467                                                 $count = ApiBase::LIMIT_SML2 + 1;
 468
 469                                                 if ( is_array( $type ) ) {
 470                                                         $count = count( $type );
 471                                                         $links = isset( $settings[ApiBase::PARAM_VALUE_LINKS] )
 472                                                                 ? $settings[ApiBase::PARAM_VALUE_LINKS]
 473                                                                 : [];
 474                                                         $type = array_map( function ( $v ) use ( $links ) {
 475                                                                 $ret = wfEscapeWikiText( $v );
 476                                                                 if ( isset( $links[$v] ) ) {
 477                                                                         $ret = "[[{$links[$v]}|$ret]]";
 478                                                                 }
 479                                                                 return $ret;
 480                                                         }, $type );
 481                                                         $i = array_search( '', $type, true );
 482                                                         if ( $i === false ) {
 483                                                                 $type = $context->getLanguage()->commaList( $type );
 484                                                         } else {
 485                                                                 unset( $type[$i] );
 486                                                                 $type = $context->msg( 'api-help-param-list-can-be-empty' )
 487                                                                         ->numParams( count( $type ) )
 488                                                                         ->params( $context->getLanguage()->commaList( $type ) )
 489                                                                         ->parse();
 490                                                         }
 491                                                         $info[] = $context->msg( 'api-help-param-list' )
 492                                                                 ->params( $multi ? 2 : 1 )
 493                                                                 ->params( $type )
 494                                                                 ->parse();
 495                                                         $hintPipeSeparated = false;
 496                                                 } else {
 497                                                         switch ( $type ) {
 498                                                                 case 'submodule':
 499                                                                         $groups[] = $name;
 500                                                                         if ( isset( $settings[ApiBase::PARAM_SUBMODULE_MAP] ) ) {
 501                                                                                 $map = $settings[ApiBase::PARAM_SUBMODULE_MAP];
 502                                                                                 ksort( $map );
 503                                                                                 $submodules = [];
 504                                                                                 foreach ( $map as $v => $m ) {
 505                                                                                         $submodules[] = "[[Special:ApiHelp/{$m}|{$v}]]";
 506                                                                                 }
 507                                                                         } else {
 508                                                                                 $submodules = $module->getModuleManager()->getNames( $name );
 509                                                                                 sort( $submodules );
 510                                                                                 $prefix = $module->isMain()
 511                                                                                         ? '' : ( $module->getModulePath() . '+' );
 512                                                                                 $submodules = array_map( function ( $name ) use ( $prefix ) {
 513                                                                                         return "[[Special:ApiHelp/{$prefix}{$name}|{$name}]]";
 514                                                                                 }, $submodules );
 515                                                                         }
 516                                                                         $count = count( $submodules );
 517                                                                         $info[] = $context->msg( 'api-help-param-list' )
 518                                                                                 ->params( $multi ? 2 : 1 )
 519                                                                                 ->params( $context->getLanguage()->commaList( $submodules ) )
 520                                                                                 ->parse();
 521                                                                         $hintPipeSeparated = false;
 522                                                                         // No type message necessary, we have a list of values.
 523                                                                         $type = null;
 524                                                                         break;
 525
 526                                                                 case 'namespace':
 527                                                                         $namespaces = MWNamespace::getValidNamespaces();
 528                                                                         $count = count( $namespaces );
 529                                                                         $info[] = $context->msg( 'api-help-param-list' )
 530                                                                                 ->params( $multi ? 2 : 1 )
 531                                                                                 ->params( $context->getLanguage()->commaList( $namespaces ) )
 532                                                                                 ->parse();
 533                                                                         $hintPipeSeparated = false;
 534                                                                         // No type message necessary, we have a list of values.
 535                                                                         $type = null;
 536                                                                         break;
 537
 538                                                                 case 'tags':
 539                                                                         $tags = ChangeTags::listExplicitlyDefinedTags();
 540                                                                         $count = count( $tags );
 541                                                                         $info[] = $context->msg( 'api-help-param-list' )
 542                                                                                 ->params( $multi ? 2 : 1 )
 543                                                                                 ->params( $context->getLanguage()->commaList( $tags ) )
 544                                                                                 ->parse();
 545                                                                         $hintPipeSeparated = false;
 546                                                                         $type = null;
 547                                                                         break;
 548
 549                                                                 case 'limit':
 550                                                                         if ( isset( $settings[ApiBase::PARAM_MAX2] ) ) {
 551                                                                                 $info[] = $context->msg( 'api-help-param-limit2' )
 552                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 553                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX2] )
 554                                                                                         ->parse();
 555                                                                         } else {
 556                                                                                 $info[] = $context->msg( 'api-help-param-limit' )
 557                                                                                         ->numParams( $settings[ApiBase::PARAM_MAX] )
 558                                                                                         ->parse();
 559                                                                         }
 560                                                                         break;
 561
 562                                                                 case 'integer':
 563                                                                         // Possible messages:
 564                                                                         // api-help-param-integer-min,
 565                                                                         // api-help-param-integer-max,
 566                                                                         // api-help-param-integer-minmax
 567                                                                         $suffix = '';
 568                                                                         $min = $max = 0;
 569                                                                         if ( isset( $settings[ApiBase::PARAM_MIN] ) ) {
 570                                                                                 $suffix .= 'min';
 571                                                                                 $min = $settings[ApiBase::PARAM_MIN];
 572                                                                         }
 573                                                                         if ( isset( $settings[ApiBase::PARAM_MAX] ) ) {
 574                                                                                 $suffix .= 'max';
 575                                                                                 $max = $settings[ApiBase::PARAM_MAX];
 576                                                                         }
 577                                                                         if ( $suffix !== '' ) {
 578                                                                                 $info[] =
 579                                                                                         $context->msg( "api-help-param-integer-$suffix" )
 580                                                                                                 ->params( $multi ? 2 : 1 )
 581                                                                                                 ->numParams( $min, $max )
 582                                                                                                 ->parse();
 583                                                                         }
 584                                                                         break;
 585
 586                                                                 case 'upload':
 587                                                                         $info[] = $context->msg( 'api-help-param-upload' )
 588                                                                                 ->parse();
 589                                                                         // No type message necessary, api-help-param-upload should handle it.
 590                                                                         $type = null;
 591                                                                         break;
 592
 593                                                                 case 'string':
 594                                                                 case 'text':
 595                                                                         // Displaying a type message here would be useless.
 596                                                                         $type = null;
 597                                                                         break;
 598                                                         }
 599                                                 }
 600
 601                                                 // Add type. Messages for grep: api-help-param-type-limit
 602                                                 // api-help-param-type-integer api-help-param-type-boolean
 603                                                 // api-help-param-type-timestamp api-help-param-type-user
 604                                                 // api-help-param-type-password
 605                                                 if ( is_string( $type ) ) {
 606                                                         $msg = $context->msg( "api-help-param-type-$type" );
 607                                                         if ( !$msg->isDisabled() ) {
 608                                                                 $info[] = $msg->params( $multi ? 2 : 1 )->parse();
 609                                                         }
 610                                                 }
 611
 612                                                 if ( $multi ) {
 613                                                         $extra = [];
 614                                                         if ( $hintPipeSeparated ) {
 615                                                                 $extra[] = $context->msg( 'api-help-param-multi-separate' )->parse();
 616                                                         }
 617                                                         if ( $count > ApiBase::LIMIT_SML1 ) {
 618                                                                 $extra[] = $context->msg( 'api-help-param-multi-max' )
 619                                                                         ->numParams( ApiBase::LIMIT_SML1, ApiBase::LIMIT_SML2 )
 620                                                                         ->parse();
 621                                                         }
 622                                                         if ( $extra ) {
 623                                                                 $info[] = implode( ' ', $extra );
 624                                                         }
 625                                                 }
 626                                         }
 627
 628                                         // Add default
 629                                         $default = isset( $settings[ApiBase::PARAM_DFLT] )
 630                                                 ? $settings[ApiBase::PARAM_DFLT]
 631                                                 : null;
 632                                         if ( $default === '' ) {
 633                                                 $info[] = $context->msg( 'api-help-param-default-empty' )
 634                                                         ->parse();
 635                                         } elseif ( $default !== null && $default !== false ) {
 636                                                 $info[] = $context->msg( 'api-help-param-default' )
 637                                                         ->params( wfEscapeWikiText( $default ) )
 638                                                         ->parse();
 639                                         }
 640
 641                                         if ( !array_filter( $description ) ) {
 642                                                 $description = [ self::wrap(
 643                                                         $context->msg( 'api-help-param-no-description' ),
 644                                                         'apihelp-empty'
 645                                                 ) ];
 646                                         }
 647
 648                                         // Add "deprecated" flag
 649                                         if ( !empty( $settings[ApiBase::PARAM_DEPRECATED] ) ) {
 650                                                 $help['parameters'] .= Html::openElement( 'dd',
 651                                                         [ 'class' => 'info' ] );
 652                                                 $help['parameters'] .= self::wrap(
 653                                                         $context->msg( 'api-help-param-deprecated' ),
 654                                                         'apihelp-deprecated', 'strong'
 655                                                 );
 656                                                 $help['parameters'] .= Html::closeElement( 'dd' );
 657                                         }
 658
 659                                         if ( $description ) {
 660                                                 $description = implode( '', $description );
 661                                                 $description = preg_replace( '!\s*</([oud]l)>\s*<\1>\s*!', "\n", $description );
 662                                                 $help['parameters'] .= Html::rawElement( 'dd',
 663                                                         [ 'class' => 'description' ], $description );
 664                                         }
 665
 666                                         foreach ( $info as $i ) {
 667                                                 $help['parameters'] .= Html::rawElement( 'dd', [ 'class' => 'info' ], $i );
 668                                         }
 669                                 }
 670
 671                                 if ( $dynamicParams !== null ) {
 672                                         $dynamicParams = ApiBase::makeMessage( $dynamicParams, $context, [
 673                                                 $module->getModulePrefix(),
 674                                                 $module->getModuleName(),
 675                                                 $module->getModulePath()
 676                                         ] );
 677                                         $help['parameters'] .= Html::element( 'dt', null, '*' );
 678                                         $help['parameters'] .= Html::rawElement( 'dd',
 679                                                 [ 'class' => 'description' ], $dynamicParams->parse() );
 680                                 }
 681
 682                                 $help['parameters'] .= Html::closeElement( 'dl' );
 683                                 $help['parameters'] .= Html::closeElement( 'div' );
 684                         }
 685
 686                         $examples = $module->getExamplesMessages();
 687                         if ( $examples ) {
 688                                 $help['examples'] .= Html::openElement( 'div',
 689                                         [ 'class' => 'apihelp-block apihelp-examples' ] );
 690                                 $msg = $context->msg( 'api-help-examples' );
 691                                 if ( !$msg->isDisabled() ) {
 692                                         $help['examples'] .= self::wrap(
 693                                                 $msg->numParams( count( $examples ) ), 'apihelp-block-head', 'div'
 694                                         );
 695                                 }
 696
 697                                 $help['examples'] .= Html::openElement( 'dl' );
 698                                 foreach ( $examples as $qs => $msg ) {
 699                                         $msg = ApiBase::makeMessage( $msg, $context, [
 700                                                 $module->getModulePrefix(),
 701                                                 $module->getModuleName(),
 702                                                 $module->getModulePath()
 703                                         ] );
 704
 705                                         $link = wfAppendQuery( wfScript( 'api' ), $qs );
 706                                         $sandbox = SpecialPage::getTitleFor( 'ApiSandbox' )->getLocalURL() . '#' . $qs;
 707                                         $help['examples'] .= Html::rawElement( 'dt', null, $msg->parse() );
 708                                         $help['examples'] .= Html::rawElement( 'dd', null,
 709                                                 Html::element( 'a', [ 'href' => $link ], "api.php?$qs" ) . ' ' .
 710                                                 Html::rawElement( 'a', [ 'href' => $sandbox ],
 711                                                         $context->msg( 'api-help-open-in-apisandbox' )->parse() )
 712                                         );
 713                                 }
 714                                 $help['examples'] .= Html::closeElement( 'dl' );
 715                                 $help['examples'] .= Html::closeElement( 'div' );
 716                         }
 717
 718                         $subtocnumber = $tocnumber;
 719                         $subtocnumber[$level + 1] = 0;
 720                         $suboptions = [
 721                                 'submodules' => $options['recursivesubmodules'],
 722                                 'headerlevel' => $level + 1,
 723                                 'tocnumber' => &$subtocnumber,
 724                                 'noheader' => false,
 725                         ] + $options;
 726
 727                         if ( $options['submodules'] && $module->getModuleManager() ) {
 728                                 $manager = $module->getModuleManager();
 729                                 $submodules = [];
 730                                 foreach ( $groups as $group ) {
 731                                         $names = $manager->getNames( $group );
 732                                         sort( $names );
 733                                         foreach ( $names as $name ) {
 734                                                 $submodules[] = $manager->getModule( $name );
 735                                         }
 736                                 }
 737                                 $help['submodules'] .= self::getHelpInternal(
 738                                         $context,
 739                                         $submodules,
 740                                         $suboptions,
 741                                         $haveModules
 742                                 );
 743                         }
 744
 745                         $module->modifyHelp( $help, $suboptions, $haveModules );
 746
 747                         Hooks::run( 'APIHelpModifyOutput', [ $module, &$help, $suboptions, &$haveModules ] );
 748
 749                         $out .= implode( "\n", $help );
 750                 }
 751
 752                 return $out;
 753         }
 754
 755         public function shouldCheckMaxlag() {
 756                 return false;
 757         }
 758
 759         public function isReadMode() {
 760                 return false;
 761         }
 762
 763         public function getCustomPrinter() {
 764                 $params = $this->extractRequestParams();
 765                 if ( $params['wrap'] ) {
 766                         return null;
 767                 }
 768
 769                 $main = $this->getMain();
 770                 $errorPrinter = $main->createPrinterByName( $main->getParameter( 'format' ) );
 771                 return new ApiFormatRaw( $main, $errorPrinter );
 772         }
 773
 774         public function getAllowedParams() {
 775                 return [
 776                         'modules' => [
 777                                 ApiBase::PARAM_DFLT => 'main',
 778                                 ApiBase::PARAM_ISMULTI => true,
 779                         ],
 780                         'submodules' => false,
 781                         'recursivesubmodules' => false,
 782                         'wrap' => false,
 783                         'toc' => false,
 784                 ];
 785         }
 786
 787         protected function getExamplesMessages() {
 788                 return [
 789                         'action=help'
 790                                 => 'apihelp-help-example-main',
 791                         'action=help&modules=query&submodules=1'
 792                                 => 'apihelp-help-example-submodules',
 793                         'action=help&recursivesubmodules=1'
 794                                 => 'apihelp-help-example-recursive',
 795                         'action=help&modules=help'
 796                                 => 'apihelp-help-example-help',
 797                         'action=help&modules=query+info|query+categorymembers'
 798                                 => 'apihelp-help-example-query',
 799                 ];
 800         }
 801
 802         public function getHelpUrls() {
 803                 return [
 804                         'https://www.mediawiki.org/wiki/API:Main_page',
 805                         'https://www.mediawiki.org/wiki/API:FAQ',
 806                         'https://www.mediawiki.org/wiki/API:Quick_start_guide',
 807                 ];
 808         }
 809 }