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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 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * http://www.gnu.org/copyleft/gpl.html |
| 21 | * |
| 22 | * @file |
| 23 | */ |
| 24 | |
| 25 | use MediaWiki\Cache\LinkBatchFactory; |
| 26 | use MediaWiki\MainConfigNames; |
| 27 | use MediaWiki\MediaWikiServices; |
| 28 | use MediaWiki\Title\Title; |
| 29 | use MediaWiki\Utils\UrlUtils; |
| 30 | use Wikimedia\ParamValidator\ParamValidator; |
| 31 | |
| 32 | /** |
| 33 | * @ingroup API |
| 34 | */ |
| 35 | class ApiOpenSearch extends ApiBase { |
| 36 | use SearchApi; |
| 37 | |
| 38 | private $format = null; |
| 39 | private $fm = null; |
| 40 | |
| 41 | private LinkBatchFactory $linkBatchFactory; |
| 42 | private UrlUtils $urlUtils; |
| 43 | |
| 44 | /** |
| 45 | * @param ApiMain $mainModule |
| 46 | * @param string $moduleName |
| 47 | * @param LinkBatchFactory $linkBatchFactory |
| 48 | * @param SearchEngineConfig $searchEngineConfig |
| 49 | * @param SearchEngineFactory $searchEngineFactory |
| 50 | * @param UrlUtils $urlUtils |
| 51 | */ |
| 52 | public function __construct( |
| 53 | ApiMain $mainModule, |
| 54 | $moduleName, |
| 55 | LinkBatchFactory $linkBatchFactory, |
| 56 | SearchEngineConfig $searchEngineConfig, |
| 57 | SearchEngineFactory $searchEngineFactory, |
| 58 | UrlUtils $urlUtils |
| 59 | ) { |
| 60 | parent::__construct( $mainModule, $moduleName ); |
| 61 | $this->linkBatchFactory = $linkBatchFactory; |
| 62 | // Services needed in SearchApi trait |
| 63 | $this->searchEngineConfig = $searchEngineConfig; |
| 64 | $this->searchEngineFactory = $searchEngineFactory; |
| 65 | $this->urlUtils = $urlUtils; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Get the output format |
| 70 | * |
| 71 | * @return string |
| 72 | */ |
| 73 | protected function getFormat() { |
| 74 | if ( $this->format === null ) { |
| 75 | $format = $this->getParameter( 'format' ); |
| 76 | |
| 77 | if ( str_ends_with( $format, 'fm' ) ) { |
| 78 | $this->format = substr( $format, 0, -2 ); |
| 79 | $this->fm = 'fm'; |
| 80 | } else { |
| 81 | $this->format = $format; |
| 82 | $this->fm = ''; |
| 83 | } |
| 84 | } |
| 85 | return $this->format; |
| 86 | } |
| 87 | |
| 88 | public function getCustomPrinter() { |
| 89 | switch ( $this->getFormat() ) { |
| 90 | case 'json': |
| 91 | return new ApiOpenSearchFormatJson( |
| 92 | $this->getMain(), $this->fm, $this->getParameter( 'warningsaserror' ) |
| 93 | ); |
| 94 | |
| 95 | case 'xml': |
| 96 | $printer = $this->getMain()->createPrinterByName( 'xml' . $this->fm ); |
| 97 | '@phan-var ApiFormatXml $printer'; |
| 98 | /** @var ApiFormatXml $printer */ |
| 99 | $printer->setRootElement( 'SearchSuggestion' ); |
| 100 | return $printer; |
| 101 | |
| 102 | default: |
| 103 | ApiBase::dieDebug( __METHOD__, "Unsupported format '{$this->getFormat()}'" ); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | public function execute() { |
| 108 | $params = $this->extractRequestParams(); |
| 109 | $search = $params['search']; |
| 110 | |
| 111 | // Open search results may be stored for a very long time |
| 112 | $this->getMain()->setCacheMaxAge( |
| 113 | $this->getConfig()->get( MainConfigNames::SearchSuggestCacheExpiry ) ); |
| 114 | $this->getMain()->setCacheMode( 'public' ); |
| 115 | $results = $this->search( $search, $params ); |
| 116 | |
| 117 | // Allow hooks to populate extracts and images |
| 118 | $this->getHookRunner()->onApiOpenSearchSuggest( $results ); |
| 119 | |
| 120 | // Trim extracts, if necessary |
| 121 | $length = $this->getConfig()->get( MainConfigNames::OpenSearchDescriptionLength ); |
| 122 | foreach ( $results as &$r ) { |
| 123 | if ( is_string( $r['extract'] ) && !$r['extract trimmed'] ) { |
| 124 | $r['extract'] = self::trimExtract( $r['extract'], $length ); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | // Populate result object |
| 129 | $this->populateResult( $search, $results ); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Perform the search |
| 134 | * @param string $search the search query |
| 135 | * @param array $params api request params |
| 136 | * @return array search results. Keys are integers. |
| 137 | * @phan-return array<array{title:Title,redirect_from:?Title,extract:false,extract_trimmed:false,image:false,url:string}> |
| 138 | * Note that phan annotations don't support keys containing a space. |
| 139 | */ |
| 140 | private function search( $search, array $params ) { |
| 141 | $searchEngine = $this->buildSearchEngine( $params ); |
| 142 | $titles = $searchEngine->extractTitles( $searchEngine->completionSearchWithVariants( $search ) ); |
| 143 | $results = []; |
| 144 | |
| 145 | if ( !$titles ) { |
| 146 | return $results; |
| 147 | } |
| 148 | |
| 149 | // Special pages need unique integer ids in the return list, so we just |
| 150 | // assign them negative numbers because those won't clash with the |
| 151 | // always positive articleIds that non-special pages get. |
| 152 | $nextSpecialPageId = -1; |
| 153 | |
| 154 | if ( $params['redirects'] === null ) { |
| 155 | // Backwards compatibility, don't resolve for JSON. |
| 156 | $resolveRedir = $this->getFormat() !== 'json'; |
| 157 | } else { |
| 158 | $resolveRedir = $params['redirects'] === 'resolve'; |
| 159 | } |
| 160 | |
| 161 | if ( $resolveRedir ) { |
| 162 | // Query for redirects |
| 163 | $redirects = []; |
| 164 | $lb = $this->linkBatchFactory->newLinkBatch( $titles ); |
| 165 | if ( !$lb->isEmpty() ) { |
| 166 | $db = $this->getDB(); |
| 167 | $res = $db->newSelectQueryBuilder() |
| 168 | ->select( [ 'page_namespace', 'page_title', 'rd_namespace', 'rd_title' ] ) |
| 169 | ->from( 'page' ) |
| 170 | ->join( 'redirect', null, [ 'rd_from = page_id' ] ) |
| 171 | ->where( [ |
| 172 | 'rd_interwiki' => '', |
| 173 | $lb->constructSet( 'page', $db ) |
| 174 | ] ) |
| 175 | ->caller( __METHOD__ ) |
| 176 | ->fetchResultSet(); |
| 177 | foreach ( $res as $row ) { |
| 178 | $redirects[$row->page_namespace][$row->page_title] = |
| 179 | [ $row->rd_namespace, $row->rd_title ]; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // Bypass any redirects |
| 184 | $seen = []; |
| 185 | foreach ( $titles as $title ) { |
| 186 | $ns = $title->getNamespace(); |
| 187 | $dbkey = $title->getDBkey(); |
| 188 | $from = null; |
| 189 | if ( isset( $redirects[$ns][$dbkey] ) ) { |
| 190 | [ $ns, $dbkey ] = $redirects[$ns][$dbkey]; |
| 191 | $from = $title; |
| 192 | $title = Title::makeTitle( $ns, $dbkey ); |
| 193 | } |
| 194 | if ( !isset( $seen[$ns][$dbkey] ) ) { |
| 195 | $seen[$ns][$dbkey] = true; |
| 196 | $resultId = $title->getArticleID(); |
| 197 | if ( $resultId === 0 ) { |
| 198 | $resultId = $nextSpecialPageId; |
| 199 | $nextSpecialPageId--; |
| 200 | } |
| 201 | $results[$resultId] = [ |
| 202 | 'title' => $title, |
| 203 | 'redirect from' => $from, |
| 204 | 'extract' => false, |
| 205 | 'extract trimmed' => false, |
| 206 | 'image' => false, |
| 207 | 'url' => (string)$this->urlUtils->expand( $title->getFullURL(), PROTO_CURRENT ), |
| 208 | ]; |
| 209 | } |
| 210 | } |
| 211 | } else { |
| 212 | foreach ( $titles as $title ) { |
| 213 | $resultId = $title->getArticleID(); |
| 214 | if ( $resultId === 0 ) { |
| 215 | $resultId = $nextSpecialPageId; |
| 216 | $nextSpecialPageId--; |
| 217 | } |
| 218 | $results[$resultId] = [ |
| 219 | 'title' => $title, |
| 220 | 'redirect from' => null, |
| 221 | 'extract' => false, |
| 222 | 'extract trimmed' => false, |
| 223 | 'image' => false, |
| 224 | 'url' => (string)$this->urlUtils->expand( $title->getFullURL(), PROTO_CURRENT ), |
| 225 | ]; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | return $results; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * @param string $search |
| 234 | * @param array[] &$results |
| 235 | */ |
| 236 | protected function populateResult( $search, &$results ) { |
| 237 | $result = $this->getResult(); |
| 238 | |
| 239 | switch ( $this->getFormat() ) { |
| 240 | case 'json': |
| 241 | // http://www.opensearch.org/Specifications/OpenSearch/Extensions/Suggestions/1.1 |
| 242 | $result->addArrayType( null, 'array' ); |
| 243 | $result->addValue( null, 0, strval( $search ) ); |
| 244 | $terms = []; |
| 245 | $descriptions = []; |
| 246 | $urls = []; |
| 247 | foreach ( $results as $r ) { |
| 248 | $terms[] = $r['title']->getPrefixedText(); |
| 249 | $descriptions[] = strval( $r['extract'] ); |
| 250 | $urls[] = $r['url']; |
| 251 | } |
| 252 | $result->addValue( null, 1, $terms ); |
| 253 | $result->addValue( null, 2, $descriptions ); |
| 254 | $result->addValue( null, 3, $urls ); |
| 255 | break; |
| 256 | |
| 257 | case 'xml': |
| 258 | // https://msdn.microsoft.com/en-us/library/cc891508(v=vs.85).aspx |
| 259 | $imageKeys = [ |
| 260 | 'source' => true, |
| 261 | 'alt' => true, |
| 262 | 'width' => true, |
| 263 | 'height' => true, |
| 264 | 'align' => true, |
| 265 | ]; |
| 266 | $items = []; |
| 267 | foreach ( $results as $r ) { |
| 268 | $item = [ |
| 269 | 'Text' => $r['title']->getPrefixedText(), |
| 270 | 'Url' => $r['url'], |
| 271 | ]; |
| 272 | if ( is_string( $r['extract'] ) && $r['extract'] !== '' ) { |
| 273 | $item['Description'] = $r['extract']; |
| 274 | } |
| 275 | if ( is_array( $r['image'] ) && isset( $r['image']['source'] ) ) { |
| 276 | $item['Image'] = array_intersect_key( $r['image'], $imageKeys ); |
| 277 | } |
| 278 | ApiResult::setSubelementsList( $item, array_keys( $item ) ); |
| 279 | $items[] = $item; |
| 280 | } |
| 281 | ApiResult::setIndexedTagName( $items, 'Item' ); |
| 282 | $result->addValue( null, 'version', '2.0' ); |
| 283 | $result->addValue( null, 'xmlns', 'http://opensearch.org/searchsuggest2' ); |
| 284 | $result->addValue( null, 'Query', strval( $search ) ); |
| 285 | $result->addSubelementsList( null, 'Query' ); |
| 286 | $result->addValue( null, 'Section', $items ); |
| 287 | break; |
| 288 | |
| 289 | default: |
| 290 | ApiBase::dieDebug( __METHOD__, "Unsupported format '{$this->getFormat()}'" ); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | public function getAllowedParams() { |
| 295 | $allowedParams = $this->buildCommonApiParams( false ) + [ |
| 296 | 'suggest' => [ |
| 297 | ParamValidator::PARAM_DEFAULT => false, |
| 298 | // Deprecated since 1.35 |
| 299 | ParamValidator::PARAM_DEPRECATED => true, |
| 300 | ], |
| 301 | 'redirects' => [ |
| 302 | ParamValidator::PARAM_TYPE => [ 'return', 'resolve' ], |
| 303 | ApiBase::PARAM_HELP_MSG_PER_VALUE => [], |
| 304 | ApiBase::PARAM_HELP_MSG_APPEND => [ 'apihelp-opensearch-param-redirects-append' ], |
| 305 | ], |
| 306 | 'format' => [ |
| 307 | ParamValidator::PARAM_DEFAULT => 'json', |
| 308 | ParamValidator::PARAM_TYPE => [ 'json', 'jsonfm', 'xml', 'xmlfm' ], |
| 309 | ], |
| 310 | 'warningsaserror' => false, |
| 311 | ]; |
| 312 | |
| 313 | // Use open search specific default limit |
| 314 | $allowedParams['limit'][ParamValidator::PARAM_DEFAULT] = $this->getConfig()->get( |
| 315 | MainConfigNames::OpenSearchDefaultLimit |
| 316 | ); |
| 317 | |
| 318 | return $allowedParams; |
| 319 | } |
| 320 | |
| 321 | public function getSearchProfileParams() { |
| 322 | return [ |
| 323 | 'profile' => [ |
| 324 | 'profile-type' => SearchEngine::COMPLETION_PROFILE_TYPE, |
| 325 | 'help-message' => 'apihelp-query+prefixsearch-param-profile' |
| 326 | ], |
| 327 | ]; |
| 328 | } |
| 329 | |
| 330 | protected function getExamplesMessages() { |
| 331 | return [ |
| 332 | 'action=opensearch&search=Te' |
| 333 | => 'apihelp-opensearch-example-te', |
| 334 | ]; |
| 335 | } |
| 336 | |
| 337 | public function getHelpUrls() { |
| 338 | return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Opensearch'; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Trim an extract to a sensible length. |
| 343 | * |
| 344 | * Adapted from Extension:OpenSearchXml, which adapted it from |
| 345 | * Extension:ActiveAbstract. |
| 346 | * |
| 347 | * @param string $text |
| 348 | * @param int $length Target length; actual result will continue to the end of a sentence. |
| 349 | * @return string |
| 350 | */ |
| 351 | public static function trimExtract( $text, $length ) { |
| 352 | static $regex = null; |
| 353 | |
| 354 | if ( $regex === null ) { |
| 355 | $endchars = [ |
| 356 | '([^\d])\.\s', '\!\s', '\?\s', // regular ASCII |
| 357 | '。', // full-width ideographic full-stop |
| 358 | '．', '！', '？', // double-width roman forms |
| 359 | '｡', // half-width ideographic full stop |
| 360 | ]; |
| 361 | $endgroup = implode( '|', $endchars ); |
| 362 | $end = "(?:$endgroup)"; |
| 363 | $sentence = ".{{$length},}?$end+"; |
| 364 | $regex = "/^($sentence)/u"; |
| 365 | } |
| 366 | |
| 367 | $matches = []; |
| 368 | if ( preg_match( $regex, $text, $matches ) ) { |
| 369 | return trim( $matches[1] ); |
| 370 | } else { |
| 371 | // Just return the first line |
| 372 | return trim( explode( "\n", $text )[0] ); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * Fetch the template for a type. |
| 378 | * |
| 379 | * @param string $type MIME type |
| 380 | * @return string |
| 381 | */ |
| 382 | public static function getOpenSearchTemplate( $type ) { |
| 383 | $services = MediaWikiServices::getInstance(); |
| 384 | $canonicalServer = $services->getMainConfig()->get( MainConfigNames::CanonicalServer ); |
| 385 | $searchEngineConfig = $services->getSearchEngineConfig(); |
| 386 | $ns = implode( '|', $searchEngineConfig->defaultNamespaces() ); |
| 387 | if ( !$ns ) { |
| 388 | $ns = '0'; |
| 389 | } |
| 390 | |
| 391 | switch ( $type ) { |
| 392 | case 'application/x-suggestions+json': |
| 393 | return $canonicalServer . |
| 394 | wfScript( 'api' ) . '?action=opensearch&search={searchTerms}&namespace=' . $ns; |
| 395 | |
| 396 | case 'application/x-suggestions+xml': |
| 397 | return $canonicalServer . |
| 398 | wfScript( 'api' ) . |
| 399 | '?action=opensearch&format=xml&search={searchTerms}&namespace=' . $ns; |
| 400 | |
| 401 | default: |
| 402 | throw new InvalidArgumentException( __METHOD__ . ": Unknown type '$type'" ); |
| 403 | } |
| 404 | } |
| 405 | } |