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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com" |
| 4 | * Copyright © 2008 Brooke Vibber <bvibber@wikimedia.org> |
| 5 | * Copyright © 2014 Wikimedia Foundation and contributors |
| 6 | * |
| 7 | * @license GPL-2.0-or-later |
| 8 | * @file |
| 9 | */ |
| 10 | |
| 11 | namespace MediaWiki\Api; |
| 12 | |
| 13 | use InvalidArgumentException; |
| 14 | use MediaWiki\MainConfigNames; |
| 15 | use MediaWiki\MediaWikiServices; |
| 16 | use MediaWiki\Page\LinkBatchFactory; |
| 17 | use MediaWiki\Search\SearchEngine; |
| 18 | use MediaWiki\Search\SearchEngineConfig; |
| 19 | use MediaWiki\Search\SearchEngineFactory; |
| 20 | use MediaWiki\Title\Title; |
| 21 | use MediaWiki\Utils\UrlUtils; |
| 22 | use Wikimedia\ParamValidator\ParamValidator; |
| 23 | |
| 24 | /** |
| 25 | * @ingroup API |
| 26 | */ |
| 27 | class ApiOpenSearch extends ApiBase { |
| 28 | use SearchApi; |
| 29 | |
| 30 | public function __construct( |
| 31 | ApiMain $mainModule, |
| 32 | string $moduleName, |
| 33 | private readonly LinkBatchFactory $linkBatchFactory, |
| 34 | SearchEngineConfig $searchEngineConfig, |
| 35 | SearchEngineFactory $searchEngineFactory, |
| 36 | private readonly UrlUtils $urlUtils, |
| 37 | ) { |
| 38 | parent::__construct( $mainModule, $moduleName ); |
| 39 | // Services needed in SearchApi trait |
| 40 | $this->searchEngineConfig = $searchEngineConfig; |
| 41 | $this->searchEngineFactory = $searchEngineFactory; |
| 42 | } |
| 43 | |
| 44 | private function getFormat(): string { |
| 45 | return $this->getParameter( 'format' ); |
| 46 | } |
| 47 | |
| 48 | private function getBaseFormat(): string { |
| 49 | $format = $this->getFormat(); |
| 50 | return str_ends_with( $format, 'fm' ) ? substr( $format, 0, -2 ) : $format; |
| 51 | } |
| 52 | |
| 53 | /** @inheritDoc */ |
| 54 | public function getCustomPrinter() { |
| 55 | switch ( $this->getBaseFormat() ) { |
| 56 | case 'json': |
| 57 | return new ApiOpenSearchFormatJson( |
| 58 | $this->getMain(), $this->getFormat(), $this->getParameter( 'warningsaserror' ) |
| 59 | ); |
| 60 | |
| 61 | case 'xml': |
| 62 | $printer = $this->getMain()->createPrinterByName( $this->getFormat() ); |
| 63 | '@phan-var ApiFormatXml $printer'; |
| 64 | /** @var ApiFormatXml $printer */ |
| 65 | $printer->setRootElement( 'SearchSuggestion' ); |
| 66 | return $printer; |
| 67 | |
| 68 | default: |
| 69 | ApiBase::dieDebug( __METHOD__, "Unsupported format '{$this->getBaseFormat()}'" ); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | public function execute() { |
| 74 | $params = $this->extractRequestParams(); |
| 75 | $search = $params['search']; |
| 76 | |
| 77 | // Open search results may be stored for a very long time |
| 78 | $this->getMain()->setCacheMaxAge( |
| 79 | $this->getConfig()->get( MainConfigNames::SearchSuggestCacheExpiry ) ); |
| 80 | $this->getMain()->setCacheMode( 'public' ); |
| 81 | $results = $this->search( $search, $params ); |
| 82 | |
| 83 | // Allow hooks to populate extracts and images |
| 84 | $this->getHookRunner()->onApiOpenSearchSuggest( $results ); |
| 85 | |
| 86 | // Trim extracts, if necessary |
| 87 | $length = $this->getConfig()->get( MainConfigNames::OpenSearchDescriptionLength ); |
| 88 | foreach ( $results as &$r ) { |
| 89 | if ( is_string( $r['extract'] ) && !$r['extract trimmed'] ) { |
| 90 | $r['extract'] = self::trimExtract( $r['extract'], $length ); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | // Populate result object |
| 95 | $this->populateResult( $search, $results ); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Perform the search |
| 100 | * @param string $search the search query |
| 101 | * @param array $params api request params |
| 102 | * @return array search results. Keys are integers. |
| 103 | * @phan-return array<array{title:Title,redirect_from:?Title,extract:false,extract_trimmed:false,image:false,url:string}> |
| 104 | * Note that phan annotations don't support keys containing a space. |
| 105 | */ |
| 106 | private function search( $search, array $params ) { |
| 107 | $searchEngine = $this->buildSearchEngine( $params ); |
| 108 | $titles = $searchEngine->extractTitles( $searchEngine->completionSearchWithVariants( $search ) ); |
| 109 | $results = []; |
| 110 | |
| 111 | if ( !$titles ) { |
| 112 | return $results; |
| 113 | } |
| 114 | |
| 115 | // Special pages need unique integer ids in the return list, so we just |
| 116 | // assign them negative numbers because those won't clash with the |
| 117 | // always positive articleIds that non-special pages get. |
| 118 | $nextSpecialPageId = -1; |
| 119 | |
| 120 | if ( $params['redirects'] === null ) { |
| 121 | // Backwards compatibility, don't resolve for JSON. |
| 122 | $resolveRedir = $this->getBaseFormat() !== 'json'; |
| 123 | } else { |
| 124 | $resolveRedir = $params['redirects'] === 'resolve'; |
| 125 | } |
| 126 | |
| 127 | if ( $resolveRedir ) { |
| 128 | // Query for redirects |
| 129 | $redirects = []; |
| 130 | $lb = $this->linkBatchFactory->newLinkBatch( $titles ); |
| 131 | if ( !$lb->isEmpty() ) { |
| 132 | $db = $this->getDB(); |
| 133 | $res = $db->newSelectQueryBuilder() |
| 134 | ->select( [ 'page_namespace', 'page_title', 'rd_namespace', 'rd_title' ] ) |
| 135 | ->from( 'page' ) |
| 136 | ->join( 'redirect', null, [ 'rd_from = page_id' ] ) |
| 137 | ->where( [ |
| 138 | 'rd_interwiki' => '', |
| 139 | $lb->constructSet( 'page', $db ) |
| 140 | ] ) |
| 141 | ->caller( __METHOD__ ) |
| 142 | ->fetchResultSet(); |
| 143 | foreach ( $res as $row ) { |
| 144 | $redirects[$row->page_namespace][$row->page_title] = |
| 145 | [ $row->rd_namespace, $row->rd_title ]; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | // Bypass any redirects |
| 150 | $seen = []; |
| 151 | foreach ( $titles as $title ) { |
| 152 | $ns = $title->getNamespace(); |
| 153 | $dbkey = $title->getDBkey(); |
| 154 | $from = null; |
| 155 | if ( isset( $redirects[$ns][$dbkey] ) ) { |
| 156 | [ $ns, $dbkey ] = $redirects[$ns][$dbkey]; |
| 157 | $from = $title; |
| 158 | $title = Title::makeTitle( $ns, $dbkey ); |
| 159 | } |
| 160 | if ( !isset( $seen[$ns][$dbkey] ) ) { |
| 161 | $seen[$ns][$dbkey] = true; |
| 162 | $resultId = $title->getArticleID(); |
| 163 | if ( $resultId === 0 ) { |
| 164 | $resultId = $nextSpecialPageId; |
| 165 | $nextSpecialPageId--; |
| 166 | } |
| 167 | $results[$resultId] = [ |
| 168 | 'title' => $title, |
| 169 | 'redirect from' => $from, |
| 170 | 'extract' => false, |
| 171 | 'extract trimmed' => false, |
| 172 | 'image' => false, |
| 173 | 'url' => (string)$this->urlUtils->expand( $title->getFullURL(), PROTO_CURRENT ), |
| 174 | ]; |
| 175 | } |
| 176 | } |
| 177 | } else { |
| 178 | foreach ( $titles as $title ) { |
| 179 | $resultId = $title->getArticleID(); |
| 180 | if ( $resultId === 0 ) { |
| 181 | $resultId = $nextSpecialPageId; |
| 182 | $nextSpecialPageId--; |
| 183 | } |
| 184 | $results[$resultId] = [ |
| 185 | 'title' => $title, |
| 186 | 'redirect from' => null, |
| 187 | 'extract' => false, |
| 188 | 'extract trimmed' => false, |
| 189 | 'image' => false, |
| 190 | 'url' => (string)$this->urlUtils->expand( $title->getFullURL(), PROTO_CURRENT ), |
| 191 | ]; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | return $results; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * @param string $search |
| 200 | * @param array[] &$results |
| 201 | */ |
| 202 | private function populateResult( $search, &$results ) { |
| 203 | $result = $this->getResult(); |
| 204 | |
| 205 | switch ( $this->getBaseFormat() ) { |
| 206 | case 'json': |
| 207 | // http://www.opensearch.org/Specifications/OpenSearch/Extensions/Suggestions/1.1 |
| 208 | $result->addArrayType( null, 'array' ); |
| 209 | $result->addValue( null, 0, strval( $search ) ); |
| 210 | $terms = []; |
| 211 | $descriptions = []; |
| 212 | $urls = []; |
| 213 | foreach ( $results as $r ) { |
| 214 | $terms[] = $r['title']->getPrefixedText(); |
| 215 | $descriptions[] = strval( $r['extract'] ); |
| 216 | $urls[] = $r['url']; |
| 217 | } |
| 218 | $result->addValue( null, 1, $terms ); |
| 219 | $result->addValue( null, 2, $descriptions ); |
| 220 | $result->addValue( null, 3, $urls ); |
| 221 | break; |
| 222 | |
| 223 | case 'xml': |
| 224 | // https://msdn.microsoft.com/en-us/library/cc891508(v=vs.85).aspx |
| 225 | $imageKeys = [ |
| 226 | 'source' => true, |
| 227 | 'alt' => true, |
| 228 | 'width' => true, |
| 229 | 'height' => true, |
| 230 | 'align' => true, |
| 231 | ]; |
| 232 | $items = []; |
| 233 | foreach ( $results as $r ) { |
| 234 | $item = [ |
| 235 | 'Text' => $r['title']->getPrefixedText(), |
| 236 | 'Url' => $r['url'], |
| 237 | ]; |
| 238 | if ( is_string( $r['extract'] ) && $r['extract'] !== '' ) { |
| 239 | $item['Description'] = $r['extract']; |
| 240 | } |
| 241 | if ( is_array( $r['image'] ) && isset( $r['image']['source'] ) ) { |
| 242 | $item['Image'] = array_intersect_key( $r['image'], $imageKeys ); |
| 243 | } |
| 244 | ApiResult::setSubelementsList( $item, array_keys( $item ) ); |
| 245 | $items[] = $item; |
| 246 | } |
| 247 | ApiResult::setIndexedTagName( $items, 'Item' ); |
| 248 | $result->addValue( null, 'version', '2.0' ); |
| 249 | $result->addValue( null, 'xmlns', 'http://opensearch.org/searchsuggest2' ); |
| 250 | $result->addValue( null, 'Query', strval( $search ) ); |
| 251 | $result->addSubelementsList( null, 'Query' ); |
| 252 | $result->addValue( null, 'Section', $items ); |
| 253 | break; |
| 254 | |
| 255 | default: |
| 256 | ApiBase::dieDebug( __METHOD__, "Unsupported format '{$this->getBaseFormat()}'" ); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /** @inheritDoc */ |
| 261 | public function getAllowedParams() { |
| 262 | $allowedParams = $this->buildCommonApiParams( false ) + [ |
| 263 | 'suggest' => [ |
| 264 | ParamValidator::PARAM_DEFAULT => false, |
| 265 | // Deprecated since 1.35 |
| 266 | ParamValidator::PARAM_DEPRECATED => true, |
| 267 | ], |
| 268 | 'redirects' => [ |
| 269 | ParamValidator::PARAM_TYPE => [ 'return', 'resolve' ], |
| 270 | ApiBase::PARAM_HELP_MSG_PER_VALUE => [], |
| 271 | ApiBase::PARAM_HELP_MSG_APPEND => [ 'apihelp-opensearch-param-redirects-append' ], |
| 272 | ], |
| 273 | 'format' => [ |
| 274 | ParamValidator::PARAM_DEFAULT => 'json', |
| 275 | ParamValidator::PARAM_TYPE => [ 'json', 'jsonfm', 'xml', 'xmlfm' ], |
| 276 | ], |
| 277 | 'warningsaserror' => false, |
| 278 | ]; |
| 279 | |
| 280 | // Use open search specific default limit |
| 281 | $allowedParams['limit'][ParamValidator::PARAM_DEFAULT] = $this->getConfig()->get( |
| 282 | MainConfigNames::OpenSearchDefaultLimit |
| 283 | ); |
| 284 | |
| 285 | return $allowedParams; |
| 286 | } |
| 287 | |
| 288 | /** @inheritDoc */ |
| 289 | public function getSearchProfileParams() { |
| 290 | return [ |
| 291 | 'profile' => [ |
| 292 | 'profile-type' => SearchEngine::COMPLETION_PROFILE_TYPE, |
| 293 | 'help-message' => 'apihelp-query+prefixsearch-param-profile' |
| 294 | ], |
| 295 | ]; |
| 296 | } |
| 297 | |
| 298 | /** @inheritDoc */ |
| 299 | protected function getExamplesMessages() { |
| 300 | return [ |
| 301 | 'action=opensearch&search=Te' |
| 302 | => 'apihelp-opensearch-example-te', |
| 303 | ]; |
| 304 | } |
| 305 | |
| 306 | /** @inheritDoc */ |
| 307 | public function getHelpUrls() { |
| 308 | return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Opensearch'; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Trim an extract to a sensible length. |
| 313 | * |
| 314 | * Adapted from Extension:OpenSearchXml, which adapted it from |
| 315 | * Extension:ActiveAbstract. |
| 316 | * |
| 317 | * @param string $text |
| 318 | * @param int $length Target length; actual result will continue to the end of a sentence. |
| 319 | * @return string |
| 320 | */ |
| 321 | public static function trimExtract( $text, $length ) { |
| 322 | static $regex = null; |
| 323 | |
| 324 | if ( $regex === null ) { |
| 325 | $endchars = [ |
| 326 | '([^\d])\.\s', '\!\s', '\?\s', // regular ASCII |
| 327 | '。', // full-width ideographic full-stop |
| 328 | '．', '！', '？', // double-width roman forms |
| 329 | '｡', // half-width ideographic full stop |
| 330 | ]; |
| 331 | $endgroup = implode( '|', $endchars ); |
| 332 | $end = "(?:$endgroup)"; |
| 333 | $sentence = ".{{$length},}?$end+"; |
| 334 | $regex = "/^($sentence)/u"; |
| 335 | } |
| 336 | |
| 337 | $matches = []; |
| 338 | if ( preg_match( $regex, $text, $matches ) ) { |
| 339 | return trim( $matches[1] ); |
| 340 | } else { |
| 341 | // Just return the first line |
| 342 | return trim( explode( "\n", $text )[0] ); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Fetch the template for a type. |
| 348 | * |
| 349 | * @param string $type MIME type |
| 350 | * @return string |
| 351 | */ |
| 352 | public static function getOpenSearchTemplate( $type ) { |
| 353 | $services = MediaWikiServices::getInstance(); |
| 354 | $canonicalServer = $services->getMainConfig()->get( MainConfigNames::CanonicalServer ); |
| 355 | $searchEngineConfig = $services->getSearchEngineConfig(); |
| 356 | $ns = implode( '|', $searchEngineConfig->defaultNamespaces() ); |
| 357 | if ( !$ns ) { |
| 358 | $ns = '0'; |
| 359 | } |
| 360 | |
| 361 | switch ( $type ) { |
| 362 | case 'application/x-suggestions+json': |
| 363 | return $canonicalServer . |
| 364 | wfScript( 'api' ) . '?action=opensearch&search={searchTerms}&namespace=' . $ns; |
| 365 | |
| 366 | case 'application/x-suggestions+xml': |
| 367 | return $canonicalServer . |
| 368 | wfScript( 'api' ) . |
| 369 | '?action=opensearch&format=xml&search={searchTerms}&namespace=' . $ns; |
| 370 | |
| 371 | default: |
| 372 | throw new InvalidArgumentException( __METHOD__ . ": Unknown type '$type'" ); |
| 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /** @deprecated class alias since 1.43 */ |
| 378 | class_alias( ApiOpenSearch::class, 'ApiOpenSearch' ); |