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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com" |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | */ |
| 22 | |
| 23 | namespace MediaWiki\Api; |
| 24 | |
| 25 | use ISearchResultSet; |
| 26 | use MediaWiki\Search\TitleMatcher; |
| 27 | use MediaWiki\Status\Status; |
| 28 | use SearchEngine; |
| 29 | use SearchEngineConfig; |
| 30 | use SearchEngineFactory; |
| 31 | use SearchResult; |
| 32 | use Wikimedia\HtmlArmor\HtmlArmor; |
| 33 | use Wikimedia\ParamValidator\ParamValidator; |
| 34 | use Wikimedia\ParamValidator\TypeDef\EnumDef; |
| 35 | |
| 36 | /** |
| 37 | * Query module to perform full text search within wiki titles and content |
| 38 | * |
| 39 | * @ingroup API |
| 40 | */ |
| 41 | class ApiQuerySearch extends ApiQueryGeneratorBase { |
| 42 | use \MediaWiki\Api\SearchApi; |
| 43 | |
| 44 | private TitleMatcher $titleMatcher; |
| 45 | |
| 46 | public function __construct( |
| 47 | ApiQuery $query, |
| 48 | string $moduleName, |
| 49 | SearchEngineConfig $searchEngineConfig, |
| 50 | SearchEngineFactory $searchEngineFactory, |
| 51 | TitleMatcher $titleMatcher |
| 52 | ) { |
| 53 | parent::__construct( $query, $moduleName, 'sr' ); |
| 54 | // Services also needed in SearchApi trait |
| 55 | $this->searchEngineConfig = $searchEngineConfig; |
| 56 | $this->searchEngineFactory = $searchEngineFactory; |
| 57 | $this->titleMatcher = $titleMatcher; |
| 58 | } |
| 59 | |
| 60 | public function execute() { |
| 61 | $this->run(); |
| 62 | } |
| 63 | |
| 64 | public function executeGenerator( $resultPageSet ) { |
| 65 | $this->run( $resultPageSet ); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * @param ApiPageSet|null $resultPageSet |
| 70 | * @return void |
| 71 | */ |
| 72 | private function run( $resultPageSet = null ) { |
| 73 | $params = $this->extractRequestParams(); |
| 74 | |
| 75 | // Extract parameters |
| 76 | $query = $params['search']; |
| 77 | $what = $params['what']; |
| 78 | $interwiki = $params['interwiki']; |
| 79 | $searchInfo = array_fill_keys( $params['info'], true ); |
| 80 | $prop = array_fill_keys( $params['prop'], true ); |
| 81 | |
| 82 | // Create search engine instance and set options |
| 83 | $search = $this->buildSearchEngine( $params ); |
| 84 | if ( isset( $params['sort'] ) ) { |
| 85 | $search->setSort( $params['sort'] ); |
| 86 | } |
| 87 | $search->setFeatureData( 'rewrite', (bool)$params['enablerewrites'] ); |
| 88 | $search->setFeatureData( 'interwiki', (bool)$interwiki ); |
| 89 | // Hint to some SearchEngines about what snippets we would like returned |
| 90 | $search->setFeatureData( 'snippets', $this->decideSnippets( $prop ) ); |
| 91 | |
| 92 | $nquery = $search->replacePrefixes( $query ); |
| 93 | if ( $nquery !== $query ) { |
| 94 | $query = $nquery; |
| 95 | wfDeprecatedMsg( 'SearchEngine::replacePrefixes() is overridden by ' . |
| 96 | get_class( $search ) . ', this was deprecated in MediaWiki 1.32', |
| 97 | '1.32' ); |
| 98 | } |
| 99 | // Perform the actual search |
| 100 | if ( $what == 'text' ) { |
| 101 | $matches = $search->searchText( $query ); |
| 102 | } elseif ( $what == 'title' ) { |
| 103 | $matches = $search->searchTitle( $query ); |
| 104 | } elseif ( $what == 'nearmatch' ) { |
| 105 | // near matches must receive the user input as provided, otherwise |
| 106 | // the near matches within namespaces are lost. |
| 107 | $matches = $this->titleMatcher->getNearMatchResultSet( $params['search'] ); |
| 108 | } else { |
| 109 | // We default to title searches; this is a terrible legacy |
| 110 | // of the way we initially set up the MySQL fulltext-based |
| 111 | // search engine with separate title and text fields. |
| 112 | // In the future, the default should be for a combined index. |
| 113 | $what = 'title'; |
| 114 | $matches = $search->searchTitle( $query ); |
| 115 | |
| 116 | // Not all search engines support a separate title search, |
| 117 | // for instance the Lucene-based engine we use on Wikipedia. |
| 118 | // In this case, fall back to full-text search (which will |
| 119 | // include titles in it!) |
| 120 | if ( $matches === null ) { |
| 121 | $what = 'text'; |
| 122 | $matches = $search->searchText( $query ); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | if ( $matches instanceof Status ) { |
| 127 | $status = $matches; |
| 128 | $matches = $status->getValue(); |
| 129 | } else { |
| 130 | $status = null; |
| 131 | } |
| 132 | |
| 133 | if ( $status ) { |
| 134 | if ( $status->isOK() ) { |
| 135 | $this->getMain()->getErrorFormatter()->addMessagesFromStatus( |
| 136 | $this->getModuleName(), |
| 137 | $status |
| 138 | ); |
| 139 | } else { |
| 140 | $this->dieStatus( $status ); |
| 141 | } |
| 142 | } elseif ( $matches === null ) { |
| 143 | $this->dieWithError( [ 'apierror-searchdisabled', $what ], "search-{$what}-disabled" ); |
| 144 | } |
| 145 | |
| 146 | $apiResult = $this->getResult(); |
| 147 | // Add search meta data to result |
| 148 | if ( isset( $searchInfo['totalhits'] ) ) { |
| 149 | $totalhits = $matches->getTotalHits(); |
| 150 | if ( $totalhits !== null ) { |
| 151 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 152 | 'totalhits', $totalhits ); |
| 153 | if ( $matches->isApproximateTotalHits() ) { |
| 154 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 155 | 'approximate_totalhits', $matches->isApproximateTotalHits() ); |
| 156 | } |
| 157 | } |
| 158 | } |
| 159 | if ( isset( $searchInfo['suggestion'] ) && $matches->hasSuggestion() ) { |
| 160 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 161 | 'suggestion', $matches->getSuggestionQuery() ); |
| 162 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 163 | 'suggestionsnippet', HtmlArmor::getHtml( $matches->getSuggestionSnippet() ) ); |
| 164 | } |
| 165 | if ( isset( $searchInfo['rewrittenquery'] ) && $matches->hasRewrittenQuery() ) { |
| 166 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 167 | 'rewrittenquery', $matches->getQueryAfterRewrite() ); |
| 168 | $apiResult->addValue( [ 'query', 'searchinfo' ], |
| 169 | 'rewrittenquerysnippet', HtmlArmor::getHtml( $matches->getQueryAfterRewriteSnippet() ) ); |
| 170 | } |
| 171 | |
| 172 | $titles = []; |
| 173 | $data = []; |
| 174 | $count = 0; |
| 175 | |
| 176 | if ( $matches->hasMoreResults() ) { |
| 177 | $this->setContinueEnumParameter( 'offset', $params['offset'] + $params['limit'] ); |
| 178 | } |
| 179 | |
| 180 | foreach ( $matches as $result ) { |
| 181 | $count++; |
| 182 | // Silently skip broken and missing titles |
| 183 | if ( $result->isBrokenTitle() || $result->isMissingRevision() ) { |
| 184 | continue; |
| 185 | } |
| 186 | |
| 187 | $vals = $this->getSearchResultData( $result, $prop ); |
| 188 | |
| 189 | if ( $resultPageSet === null ) { |
| 190 | if ( $vals ) { |
| 191 | // Add item to results and see whether it fits |
| 192 | $fit = $apiResult->addValue( [ 'query', $this->getModuleName() ], null, $vals ); |
| 193 | if ( !$fit ) { |
| 194 | $this->setContinueEnumParameter( 'offset', $params['offset'] + $count - 1 ); |
| 195 | break; |
| 196 | } |
| 197 | } |
| 198 | } else { |
| 199 | $titles[] = $result->getTitle(); |
| 200 | $data[] = $vals ?: []; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | // Here we assume interwiki results do not count with |
| 205 | // regular search results. We may want to reconsider this |
| 206 | // if we ever return a lot of interwiki results or want pagination |
| 207 | // for them. |
| 208 | // Interwiki results inside main result set |
| 209 | $canAddInterwiki = (bool)$params['enablerewrites'] && ( $resultPageSet === null ); |
| 210 | if ( $canAddInterwiki ) { |
| 211 | $this->addInterwikiResults( $matches, $apiResult, $prop, 'additional', |
| 212 | ISearchResultSet::INLINE_RESULTS ); |
| 213 | } |
| 214 | |
| 215 | // Interwiki results outside main result set |
| 216 | if ( $interwiki && $resultPageSet === null ) { |
| 217 | $this->addInterwikiResults( $matches, $apiResult, $prop, 'interwiki', |
| 218 | ISearchResultSet::SECONDARY_RESULTS ); |
| 219 | } |
| 220 | |
| 221 | if ( $resultPageSet === null ) { |
| 222 | $apiResult->addIndexedTagName( [ |
| 223 | 'query', $this->getModuleName() |
| 224 | ], 'p' ); |
| 225 | } else { |
| 226 | $resultPageSet->setRedirectMergePolicy( static function ( $current, $new ) { |
| 227 | if ( !isset( $current['index'] ) || $new['index'] < $current['index'] ) { |
| 228 | $current['index'] = $new['index']; |
| 229 | } |
| 230 | return $current; |
| 231 | } ); |
| 232 | $resultPageSet->populateFromTitles( $titles ); |
| 233 | $offset = $params['offset'] + 1; |
| 234 | foreach ( $titles as $index => $title ) { |
| 235 | $resultPageSet->setGeneratorData( |
| 236 | $title, |
| 237 | $data[ $index ] + [ 'index' => $index + $offset ] |
| 238 | ); |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Assemble search result data. |
| 245 | * @param SearchResult $result Search result |
| 246 | * @param array $prop Props to extract (as keys) |
| 247 | * @return array|null Result data or null if result is broken in some way. |
| 248 | */ |
| 249 | private function getSearchResultData( SearchResult $result, $prop ) { |
| 250 | // Silently skip broken and missing titles |
| 251 | if ( $result->isBrokenTitle() || $result->isMissingRevision() ) { |
| 252 | return null; |
| 253 | } |
| 254 | |
| 255 | $vals = []; |
| 256 | |
| 257 | $title = $result->getTitle(); |
| 258 | ApiQueryBase::addTitleInfo( $vals, $title ); |
| 259 | $vals['pageid'] = $title->getArticleID(); |
| 260 | |
| 261 | if ( isset( $prop['size'] ) ) { |
| 262 | $vals['size'] = $result->getByteSize(); |
| 263 | } |
| 264 | if ( isset( $prop['wordcount'] ) ) { |
| 265 | $vals['wordcount'] = $result->getWordCount(); |
| 266 | } |
| 267 | if ( isset( $prop['snippet'] ) ) { |
| 268 | $vals['snippet'] = $result->getTextSnippet(); |
| 269 | } |
| 270 | if ( isset( $prop['timestamp'] ) ) { |
| 271 | $vals['timestamp'] = wfTimestamp( TS_ISO_8601, $result->getTimestamp() ); |
| 272 | } |
| 273 | if ( isset( $prop['titlesnippet'] ) ) { |
| 274 | $vals['titlesnippet'] = $result->getTitleSnippet(); |
| 275 | } |
| 276 | if ( isset( $prop['categorysnippet'] ) ) { |
| 277 | $vals['categorysnippet'] = $result->getCategorySnippet(); |
| 278 | } |
| 279 | if ( $result->getRedirectTitle() !== null ) { |
| 280 | if ( isset( $prop['redirecttitle'] ) ) { |
| 281 | $vals['redirecttitle'] = $result->getRedirectTitle()->getPrefixedText(); |
| 282 | } |
| 283 | if ( isset( $prop['redirectsnippet'] ) ) { |
| 284 | $vals['redirectsnippet'] = $result->getRedirectSnippet(); |
| 285 | } |
| 286 | } |
| 287 | if ( $result->getSectionTitle() !== null ) { |
| 288 | if ( isset( $prop['sectiontitle'] ) ) { |
| 289 | $vals['sectiontitle'] = $result->getSectionTitle()->getFragment(); |
| 290 | } |
| 291 | if ( isset( $prop['sectionsnippet'] ) ) { |
| 292 | $vals['sectionsnippet'] = $result->getSectionSnippet(); |
| 293 | } |
| 294 | } |
| 295 | if ( isset( $prop['isfilematch'] ) ) { |
| 296 | $vals['isfilematch'] = $result->isFileMatch(); |
| 297 | } |
| 298 | |
| 299 | if ( isset( $prop['extensiondata'] ) ) { |
| 300 | $extra = $result->getExtensionData(); |
| 301 | // Add augmented data to the result. The data would be organized as a map: |
| 302 | // augmentorName => data |
| 303 | if ( $extra ) { |
| 304 | $vals['extensiondata'] = ApiResult::addMetadataToResultVars( $extra ); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return $vals; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Add interwiki results as a section in query results. |
| 313 | * @param ISearchResultSet $matches |
| 314 | * @param ApiResult $apiResult |
| 315 | * @param array $prop Props to extract (as keys) |
| 316 | * @param string $section Section name where results would go |
| 317 | * @param int $type Interwiki result type |
| 318 | * @return int|null Number of total hits in the data or null if none was produced |
| 319 | */ |
| 320 | private function addInterwikiResults( |
| 321 | ISearchResultSet $matches, ApiResult $apiResult, $prop, |
| 322 | $section, $type |
| 323 | ) { |
| 324 | $totalhits = null; |
| 325 | $approximateTotalHits = false; |
| 326 | if ( $matches->hasInterwikiResults( $type ) ) { |
| 327 | foreach ( $matches->getInterwikiResults( $type ) as $interwikiMatches ) { |
| 328 | // Include number of results if requested |
| 329 | $interwikiTotalHits = $interwikiMatches->getTotalHits(); |
| 330 | if ( $interwikiTotalHits !== null ) { |
| 331 | $totalhits += $interwikiTotalHits; |
| 332 | $approximateTotalHits = $approximateTotalHits || $interwikiMatches->isApproximateTotalHits(); |
| 333 | } |
| 334 | |
| 335 | foreach ( $interwikiMatches as $result ) { |
| 336 | $title = $result->getTitle(); |
| 337 | $vals = $this->getSearchResultData( $result, $prop ); |
| 338 | |
| 339 | $vals['namespace'] = $result->getInterwikiNamespaceText(); |
| 340 | $vals['title'] = $title->getText(); |
| 341 | $vals['url'] = $title->getFullURL(); |
| 342 | |
| 343 | // Add item to results and see whether it fits |
| 344 | $fit = $apiResult->addValue( [ |
| 345 | 'query', |
| 346 | $section . $this->getModuleName(), |
| 347 | $result->getInterwikiPrefix() |
| 348 | ], null, $vals ); |
| 349 | |
| 350 | if ( !$fit ) { |
| 351 | // We hit the limit. We can't really provide any meaningful |
| 352 | // pagination info so just bail out |
| 353 | break; |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | if ( $totalhits !== null ) { |
| 358 | $apiResult->addValue( [ 'query', $section . 'searchinfo' ], 'totalhits', $totalhits ); |
| 359 | if ( $approximateTotalHits ) { |
| 360 | $apiResult->addValue( [ 'query', $section . 'searchinfo' ], 'approximate_totalhits', true ); |
| 361 | } |
| 362 | $apiResult->addIndexedTagName( [ |
| 363 | 'query', $section . $this->getModuleName() |
| 364 | ], 'p' ); |
| 365 | } |
| 366 | } |
| 367 | return $totalhits; |
| 368 | } |
| 369 | |
| 370 | private function decideSnippets( array $prop ): array { |
| 371 | // Field names align with definitions in ContentHandler::getFieldsForSearchIndex. |
| 372 | // Except `redirect` which isn't explicitly created, but refers to the title of |
| 373 | // pages that redirect to the result page. |
| 374 | $fields = []; |
| 375 | if ( isset( $prop['titlesnippet'] ) ) { |
| 376 | $fields[] = 'title'; |
| 377 | } |
| 378 | // checking snippet and title variants is a bit special cased, but some search |
| 379 | // engines generate the title variant from the snippet and thus must have the |
| 380 | // snippet requested to provide the title. |
| 381 | if ( isset( $prop['redirectsnippet'] ) || isset( $prop['redirecttitle'] ) ) { |
| 382 | $fields[] = 'redirect'; |
| 383 | } |
| 384 | if ( isset( $prop['categorysnippet'] ) ) { |
| 385 | $fields[] = 'category'; |
| 386 | } |
| 387 | if ( isset( $prop['sectionsnippet'] ) || isset( $prop['sectiontitle'] ) ) { |
| 388 | $fields[] = 'heading'; |
| 389 | } |
| 390 | return $fields; |
| 391 | } |
| 392 | |
| 393 | public function getCacheMode( $params ) { |
| 394 | return 'public'; |
| 395 | } |
| 396 | |
| 397 | public function getAllowedParams() { |
| 398 | $allowedParams = $this->buildCommonApiParams() + [ |
| 399 | 'what' => [ |
| 400 | ParamValidator::PARAM_TYPE => [ |
| 401 | 'title', |
| 402 | 'text', |
| 403 | 'nearmatch', |
| 404 | ] |
| 405 | ], |
| 406 | 'info' => [ |
| 407 | ParamValidator::PARAM_DEFAULT => 'totalhits|suggestion|rewrittenquery', |
| 408 | ParamValidator::PARAM_TYPE => [ |
| 409 | 'totalhits', |
| 410 | 'suggestion', |
| 411 | 'rewrittenquery', |
| 412 | ], |
| 413 | ParamValidator::PARAM_ISMULTI => true, |
| 414 | ], |
| 415 | 'prop' => [ |
| 416 | ParamValidator::PARAM_DEFAULT => 'size|wordcount|timestamp|snippet', |
| 417 | ParamValidator::PARAM_TYPE => [ |
| 418 | 'size', |
| 419 | 'wordcount', |
| 420 | 'timestamp', |
| 421 | 'snippet', |
| 422 | 'titlesnippet', |
| 423 | 'redirecttitle', |
| 424 | 'redirectsnippet', |
| 425 | 'sectiontitle', |
| 426 | 'sectionsnippet', |
| 427 | 'isfilematch', |
| 428 | 'categorysnippet', |
| 429 | 'score', // deprecated |
| 430 | 'hasrelated', // deprecated |
| 431 | 'extensiondata', |
| 432 | ], |
| 433 | ParamValidator::PARAM_ISMULTI => true, |
| 434 | ApiBase::PARAM_HELP_MSG_PER_VALUE => [], |
| 435 | EnumDef::PARAM_DEPRECATED_VALUES => [ |
| 436 | 'score' => true, |
| 437 | 'hasrelated' => true |
| 438 | ], |
| 439 | ], |
| 440 | 'interwiki' => false, |
| 441 | 'enablerewrites' => false, |
| 442 | ]; |
| 443 | |
| 444 | // Generators only add info/properties if explicitly requested. T263841 |
| 445 | if ( $this->isInGeneratorMode() ) { |
| 446 | $allowedParams['prop'][ParamValidator::PARAM_DEFAULT] = ''; |
| 447 | $allowedParams['info'][ParamValidator::PARAM_DEFAULT] = ''; |
| 448 | } |
| 449 | |
| 450 | // If we have more than one engine the list of available sorts is |
| 451 | // difficult to represent. For now don't expose it. |
| 452 | $alternatives = $this->searchEngineConfig->getSearchTypes(); |
| 453 | if ( count( $alternatives ) == 1 ) { |
| 454 | $allowedParams['sort'] = [ |
| 455 | ParamValidator::PARAM_DEFAULT => SearchEngine::DEFAULT_SORT, |
| 456 | ParamValidator::PARAM_TYPE => $this->searchEngineFactory->create()->getValidSorts(), |
| 457 | ]; |
| 458 | } |
| 459 | |
| 460 | return $allowedParams; |
| 461 | } |
| 462 | |
| 463 | public function getSearchProfileParams() { |
| 464 | return [ |
| 465 | 'qiprofile' => [ |
| 466 | 'profile-type' => SearchEngine::FT_QUERY_INDEP_PROFILE_TYPE, |
| 467 | 'help-message' => 'apihelp-query+search-param-qiprofile', |
| 468 | ], |
| 469 | ]; |
| 470 | } |
| 471 | |
| 472 | protected function getExamplesMessages() { |
| 473 | return [ |
| 474 | 'action=query&list=search&srsearch=meaning' |
| 475 | => 'apihelp-query+search-example-simple', |
| 476 | 'action=query&list=search&srwhat=text&srsearch=meaning' |
| 477 | => 'apihelp-query+search-example-text', |
| 478 | 'action=query&generator=search&gsrsearch=meaning&prop=info' |
| 479 | => 'apihelp-query+search-example-generator', |
| 480 | ]; |
| 481 | } |
| 482 | |
| 483 | public function getHelpUrls() { |
| 484 | return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Search'; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | /** @deprecated class alias since 1.43 */ |
| 489 | class_alias( ApiQuerySearch::class, 'ApiQuerySearch' ); |