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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch\Search; |
| 4 | |
| 5 | use CirrusSearch\CirrusDebugOptions; |
| 6 | use CirrusSearch\CirrusSearchHookRunner; |
| 7 | use CirrusSearch\CrossSearchStrategy; |
| 8 | use CirrusSearch\HashSearchConfig; |
| 9 | use CirrusSearch\Parser\AST\ParsedQuery; |
| 10 | use CirrusSearch\Parser\NamespacePrefixParser; |
| 11 | use CirrusSearch\Parser\QueryParserFactory; |
| 12 | use CirrusSearch\Query\Builder\ContextualFilter; |
| 13 | use CirrusSearch\SearchConfig; |
| 14 | use Wikimedia\Assert\Assert; |
| 15 | |
| 16 | /** |
| 17 | * Builder for SearchQuery |
| 18 | */ |
| 19 | final class SearchQueryBuilder { |
| 20 | |
| 21 | /** |
| 22 | * @var ParsedQuery |
| 23 | */ |
| 24 | private $parsedQuery; |
| 25 | |
| 26 | /** |
| 27 | * @var int[]|null |
| 28 | */ |
| 29 | private $initialNamespaces; |
| 30 | |
| 31 | /** |
| 32 | * @var bool |
| 33 | */ |
| 34 | private $crossProjectSearch = false; |
| 35 | |
| 36 | /** |
| 37 | * @var bool |
| 38 | */ |
| 39 | private $crossLanguageSearch = false; |
| 40 | |
| 41 | /** |
| 42 | * @var bool |
| 43 | */ |
| 44 | private $extraIndicesSearch = false; |
| 45 | |
| 46 | /** |
| 47 | * @var ContextualFilter[] |
| 48 | */ |
| 49 | private $contextualFilters = []; |
| 50 | |
| 51 | /** |
| 52 | * @var string |
| 53 | */ |
| 54 | private $searchEngineEntryPoint; |
| 55 | |
| 56 | /** |
| 57 | * @var string |
| 58 | */ |
| 59 | private $sort; |
| 60 | |
| 61 | /** |
| 62 | * @var int|null |
| 63 | */ |
| 64 | private $randomSeed; |
| 65 | |
| 66 | /** |
| 67 | * @var string[] |
| 68 | */ |
| 69 | private $forcedProfiles = []; |
| 70 | |
| 71 | /** |
| 72 | * @var int |
| 73 | */ |
| 74 | private $offset; |
| 75 | |
| 76 | /** |
| 77 | * @var int |
| 78 | */ |
| 79 | private $limit; |
| 80 | |
| 81 | /** |
| 82 | * @var CirrusDebugOptions |
| 83 | */ |
| 84 | private $debugOptions; |
| 85 | |
| 86 | /** |
| 87 | * @var SearchConfig |
| 88 | */ |
| 89 | private $searchConfig; |
| 90 | |
| 91 | /** |
| 92 | * @var bool |
| 93 | */ |
| 94 | private $withDYMSuggestion = false; |
| 95 | |
| 96 | /** |
| 97 | * @var bool |
| 98 | */ |
| 99 | private $allowRewrite = false; |
| 100 | |
| 101 | /** |
| 102 | * @var string[] parameters for the SearchProfileService |
| 103 | * @see \CirrusSearch\Profile\ContextualProfileOverride |
| 104 | */ |
| 105 | private $profileContextParameters = []; |
| 106 | |
| 107 | /** |
| 108 | * @var string[] list of extra fields to extract |
| 109 | */ |
| 110 | private $extraFieldsToExtract = []; |
| 111 | |
| 112 | /** |
| 113 | * @var bool When false the engine will decide the best fields to highlight, when |
| 114 | * true all fields will be highlighted (with increased computational cost). |
| 115 | */ |
| 116 | private $provideAllSnippets = false; |
| 117 | |
| 118 | /** |
| 119 | * Construct a new FT (FullText) SearchQueryBuilder using the config |
| 120 | * and query string provided. |
| 121 | * |
| 122 | * NOTE: this method will parse the query string and set all builder attributes |
| 123 | * to Fulltext search defaults. |
| 124 | * |
| 125 | * @param SearchConfig $config |
| 126 | * @param string $queryString |
| 127 | * @param NamespacePrefixParser $namespacePrefixParser |
| 128 | * @param CirrusSearchHookRunner $cirrusSearchHookRunner |
| 129 | * @return SearchQueryBuilder |
| 130 | * @throws \CirrusSearch\Parser\ParsedQueryClassifierException |
| 131 | * @throws \CirrusSearch\Parser\QueryStringRegex\SearchQueryParseException |
| 132 | */ |
| 133 | public static function newFTSearchQueryBuilder( |
| 134 | SearchConfig $config, |
| 135 | $queryString, |
| 136 | NamespacePrefixParser $namespacePrefixParser, |
| 137 | CirrusSearchHookRunner $cirrusSearchHookRunner |
| 138 | ): SearchQueryBuilder { |
| 139 | $builder = new self(); |
| 140 | $builder->parsedQuery = QueryParserFactory::newFullTextQueryParser( $config, |
| 141 | $namespacePrefixParser, $cirrusSearchHookRunner )->parse( $queryString ); |
| 142 | $builder->initialNamespaces = [ NS_MAIN ]; |
| 143 | $builder->sort = \SearchEngine::DEFAULT_SORT; |
| 144 | $builder->randomSeed = null; |
| 145 | $builder->debugOptions = CirrusDebugOptions::defaultOptions(); |
| 146 | $builder->limit = 10; |
| 147 | $builder->offset = 0; |
| 148 | $builder->searchConfig = $config; |
| 149 | $builder->forcedProfiles = []; |
| 150 | $builder->searchEngineEntryPoint = SearchQuery::SEARCH_TEXT; |
| 151 | $builder->crossProjectSearch = true; |
| 152 | $builder->crossLanguageSearch = true; |
| 153 | $builder->extraIndicesSearch = true; |
| 154 | $builder->withDYMSuggestion = true; |
| 155 | $builder->allowRewrite = false; |
| 156 | $builder->provideAllSnippets = false; |
| 157 | return $builder; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Recreate a SearchQueryBuilder using an existing query and the target wiki SearchConfig. |
| 162 | * |
| 163 | * @param SearchConfig $config |
| 164 | * @param SearchQuery $query |
| 165 | * @return SearchQueryBuilder |
| 166 | */ |
| 167 | public static function forCrossProjectSearch( SearchConfig $config, SearchQuery $query ): SearchQueryBuilder { |
| 168 | Assert::parameter( !$config->isLocalWiki(), '$config', 'must not be the local wiki config' ); |
| 169 | Assert::precondition( $query->getCrossSearchStrategy()->isCrossProjectSearchSupported(), |
| 170 | 'Trying to build a query for a cross-project search but the original query does not ' . |
| 171 | 'support such searches.' ); |
| 172 | |
| 173 | $builder = self::copyQueryForCrossSearch( $config, $query ); |
| 174 | $builder->offset = 0; |
| 175 | $builder->limit = $query->getSearchConfig()->get( 'CirrusSearchNumCrossProjectSearchResults' ); |
| 176 | return $builder; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * @param SearchConfig $config |
| 181 | * @param SearchQuery $original |
| 182 | * @return SearchQueryBuilder |
| 183 | */ |
| 184 | private static function copyQueryForCrossSearch( SearchConfig $config, SearchQuery $original ): SearchQueryBuilder { |
| 185 | Assert::precondition( $original->getContextualFilters() === [], 'The initial must not have contextual filters' ); |
| 186 | $builder = new self(); |
| 187 | $builder->parsedQuery = $original->getParsedQuery(); |
| 188 | $builder->searchEngineEntryPoint = $original->getSearchEngineEntryPoint(); |
| 189 | |
| 190 | // Only allow core namespaces. We can't be sure any others exist |
| 191 | // TODO: possibly move this later and try to detect if we run the default |
| 192 | // profile, so that we could try to run the default profile on sister wikis |
| 193 | $namespaces = $original->getInitialNamespaces(); |
| 194 | if ( $namespaces !== null ) { |
| 195 | $namespaces = array_filter( $namespaces, static function ( $namespace ) { |
| 196 | return $namespace <= NS_CATEGORY_TALK; |
| 197 | } ); |
| 198 | } |
| 199 | |
| 200 | $builder->initialNamespaces = $namespaces; |
| 201 | $builder->sort = $original->getSort(); |
| 202 | $builder->randomSeed = $original->getRandomSeed(); |
| 203 | $builder->debugOptions = $original->getDebugOptions(); |
| 204 | $builder->searchConfig = $config; |
| 205 | $builder->profileContextParameters = $original->getProfileContextParameters(); |
| 206 | |
| 207 | $forcedProfiles = []; |
| 208 | |
| 209 | // Copy forced profiles only if they exist on the target wiki. |
| 210 | foreach ( $original->getForcedProfiles() as $type => $name ) { |
| 211 | if ( $config->getProfileService()->hasProfile( $type, $name ) ) { |
| 212 | $forcedProfiles[$type] = $name; |
| 213 | } |
| 214 | } |
| 215 | // we do not copy extraFieldsToExtract as we have no way to know if they are available on a |
| 216 | // target wiki |
| 217 | $builder->extraFieldsToExtract = []; |
| 218 | |
| 219 | $builder->forcedProfiles = $forcedProfiles; |
| 220 | // We force to false, during cross project/lang searches |
| 221 | // and we explicitely disable DYM suggestions |
| 222 | $builder->crossProjectSearch = false; |
| 223 | $builder->crossLanguageSearch = false; |
| 224 | $builder->extraIndicesSearch = false; |
| 225 | $builder->withDYMSuggestion = false; |
| 226 | $builder->allowRewrite = false; |
| 227 | return $builder; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * @param SearchConfig $config |
| 232 | * @param SearchQuery $original |
| 233 | * @return SearchQueryBuilder |
| 234 | */ |
| 235 | public static function forCrossLanguageSearch( SearchConfig $config, SearchQuery $original ) { |
| 236 | Assert::parameter( !$config->isLocalWiki(), '$config', 'must not be the local wiki config' ); |
| 237 | Assert::precondition( $original->getCrossSearchStrategy()->isCrossLanguageSearchSupported(), |
| 238 | 'Trying to build a query for a cross-language search but the original query does not ' . |
| 239 | 'support such searches.' ); |
| 240 | |
| 241 | $builder = self::copyQueryForCrossSearch( $config, $original ); |
| 242 | $builder->offset = $original->getOffset(); |
| 243 | $builder->limit = $original->getLimit(); |
| 244 | return $builder; |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * @param SearchQuery $original |
| 249 | * @param string $term |
| 250 | * @param NamespacePrefixParser $namespacePrefixParser |
| 251 | * @param CirrusSearchHookRunner $cirrusSearchHookRunner |
| 252 | * @return SearchQueryBuilder |
| 253 | * @throws \CirrusSearch\Parser\QueryStringRegex\SearchQueryParseException |
| 254 | */ |
| 255 | public static function forRewrittenQuery( |
| 256 | SearchQuery $original, |
| 257 | $term, |
| 258 | NamespacePrefixParser $namespacePrefixParser, |
| 259 | CirrusSearchHookRunner $cirrusSearchHookRunner |
| 260 | ): SearchQueryBuilder { |
| 261 | Assert::precondition( $original->isAllowRewrite(), 'The original query must allow rewrites' ); |
| 262 | // Hack to prevent a second pass on this cleaning algo because its destructive |
| 263 | $config = new HashSearchConfig( [ 'CirrusSearchStripQuestionMarks' => 'no' ], |
| 264 | [ HashSearchConfig::FLAG_INHERIT ], $original->getSearchConfig() ); |
| 265 | |
| 266 | $builder = self::newFTSearchQueryBuilder( $config, $term, $namespacePrefixParser, $cirrusSearchHookRunner ); |
| 267 | $builder->contextualFilters = $original->getContextualFilters(); |
| 268 | $builder->forcedProfiles = $original->getForcedProfiles(); |
| 269 | $builder->initialNamespaces = $original->getInitialNamespaces(); |
| 270 | $builder->sort = $original->getSort(); |
| 271 | $builder->randomSeed = $original->getRandomSeed(); |
| 272 | $builder->debugOptions = $original->getDebugOptions(); |
| 273 | $builder->limit = $original->getLimit(); |
| 274 | $builder->offset = $original->getOffset(); |
| 275 | $builder->crossProjectSearch = false; |
| 276 | $builder->crossLanguageSearch = false; |
| 277 | $builder->extraIndicesSearch = $original->getInitialCrossSearchStrategy()->isExtraIndicesSearchSupported(); |
| 278 | $builder->withDYMSuggestion = false; |
| 279 | $builder->allowRewrite = false; |
| 280 | $builder->extraFieldsToExtract = $original->getExtraFieldsToExtract(); |
| 281 | return $builder; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * @return SearchQuery |
| 286 | */ |
| 287 | public function build(): SearchQuery { |
| 288 | return new SearchQuery( |
| 289 | $this->parsedQuery, |
| 290 | $this->initialNamespaces, |
| 291 | new CrossSearchStrategy( |
| 292 | $this->crossProjectSearch && $this->searchConfig->isCrossProjectSearchEnabled(), |
| 293 | $this->crossLanguageSearch && $this->searchConfig->isCrossLanguageSearchEnabled(), |
| 294 | $this->extraIndicesSearch |
| 295 | ), |
| 296 | $this->contextualFilters, |
| 297 | $this->searchEngineEntryPoint, |
| 298 | $this->sort, |
| 299 | $this->randomSeed, |
| 300 | $this->forcedProfiles, |
| 301 | $this->offset, |
| 302 | $this->limit, |
| 303 | $this->debugOptions ?? CirrusDebugOptions::defaultOptions(), |
| 304 | $this->searchConfig, |
| 305 | $this->withDYMSuggestion, |
| 306 | $this->allowRewrite, |
| 307 | $this->profileContextParameters, |
| 308 | $this->extraFieldsToExtract, |
| 309 | $this->provideAllSnippets |
| 310 | ); |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * @param string $name |
| 315 | * @param ContextualFilter $filter |
| 316 | * @return SearchQueryBuilder |
| 317 | */ |
| 318 | public function addContextualFilter( $name, ContextualFilter $filter ): SearchQueryBuilder { |
| 319 | Assert::parameter( !array_key_exists( $name, $this->contextualFilters ), |
| 320 | '$name', "context filter $name already set" ); |
| 321 | $this->contextualFilters[$name] = $filter; |
| 322 | return $this; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * @param int[] $initialNamespaces |
| 327 | * @return SearchQueryBuilder |
| 328 | */ |
| 329 | public function setInitialNamespaces( array $initialNamespaces ): SearchQueryBuilder { |
| 330 | $this->initialNamespaces = $initialNamespaces; |
| 331 | |
| 332 | return $this; |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * @param bool $crossProjectSearch |
| 337 | * @return SearchQueryBuilder |
| 338 | */ |
| 339 | public function setCrossProjectSearch( $crossProjectSearch ): SearchQueryBuilder { |
| 340 | $this->crossProjectSearch = $crossProjectSearch; |
| 341 | |
| 342 | return $this; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * @param bool $crossLanguageSearch |
| 347 | * @return SearchQueryBuilder |
| 348 | */ |
| 349 | public function setCrossLanguageSearch( $crossLanguageSearch ): SearchQueryBuilder { |
| 350 | $this->crossLanguageSearch = $crossLanguageSearch; |
| 351 | |
| 352 | return $this; |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * @param string $searchEngineEntryPoint |
| 357 | * @return SearchQueryBuilder |
| 358 | */ |
| 359 | public function setSearchEngineEntryPoint( $searchEngineEntryPoint ): SearchQueryBuilder { |
| 360 | $this->searchEngineEntryPoint = $searchEngineEntryPoint; |
| 361 | |
| 362 | return $this; |
| 363 | } |
| 364 | |
| 365 | /** |
| 366 | * @param string $sort |
| 367 | * @return SearchQueryBuilder |
| 368 | */ |
| 369 | public function setSort( $sort ): SearchQueryBuilder { |
| 370 | $this->sort = $sort; |
| 371 | |
| 372 | return $this; |
| 373 | } |
| 374 | |
| 375 | /** |
| 376 | * @param int $offset |
| 377 | * @return SearchQueryBuilder |
| 378 | */ |
| 379 | public function setOffset( $offset ): SearchQueryBuilder { |
| 380 | $this->offset = $offset; |
| 381 | |
| 382 | return $this; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * @param int $limit |
| 387 | * @return SearchQueryBuilder |
| 388 | */ |
| 389 | public function setLimit( $limit ): SearchQueryBuilder { |
| 390 | $this->limit = $limit; |
| 391 | |
| 392 | return $this; |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * @param int|null $randomSeed |
| 397 | * @return $this |
| 398 | */ |
| 399 | public function setRandomSeed( ?int $randomSeed ): SearchQueryBuilder { |
| 400 | $this->randomSeed = $randomSeed; |
| 401 | |
| 402 | return $this; |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * @param CirrusDebugOptions $debugOptions |
| 407 | * @return SearchQueryBuilder |
| 408 | */ |
| 409 | public function setDebugOptions( CirrusDebugOptions $debugOptions ): SearchQueryBuilder { |
| 410 | $this->debugOptions = $debugOptions; |
| 411 | |
| 412 | return $this; |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * @param bool $withDYMSuggestion |
| 417 | * @return SearchQueryBuilder |
| 418 | */ |
| 419 | public function setWithDYMSuggestion( $withDYMSuggestion ): SearchQueryBuilder { |
| 420 | $this->withDYMSuggestion = $withDYMSuggestion; |
| 421 | |
| 422 | return $this; |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * @param bool $extraIndicesSearch |
| 427 | * @return SearchQueryBuilder |
| 428 | */ |
| 429 | public function setExtraIndicesSearch( $extraIndicesSearch ): SearchQueryBuilder { |
| 430 | $this->extraIndicesSearch = $extraIndicesSearch; |
| 431 | |
| 432 | return $this; |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * @param string $type |
| 437 | * @param string $forcedProfile |
| 438 | * @return SearchQueryBuilder |
| 439 | */ |
| 440 | public function addForcedProfile( $type, $forcedProfile ): SearchQueryBuilder { |
| 441 | $this->forcedProfiles[$type] = $forcedProfile; |
| 442 | return $this; |
| 443 | } |
| 444 | |
| 445 | /** |
| 446 | * @param bool $allowRewrite |
| 447 | * @return SearchQueryBuilder |
| 448 | */ |
| 449 | public function setAllowRewrite( $allowRewrite ): SearchQueryBuilder { |
| 450 | $this->allowRewrite = $allowRewrite; |
| 451 | |
| 452 | return $this; |
| 453 | } |
| 454 | |
| 455 | /** |
| 456 | * @param string $key |
| 457 | * @param string $value |
| 458 | * @return SearchQueryBuilder |
| 459 | * @see \CirrusSearch\Profile\ContextualProfileOverride |
| 460 | */ |
| 461 | public function addProfileContextParameter( $key, $value ): SearchQueryBuilder { |
| 462 | $this->profileContextParameters[$key] = $value; |
| 463 | return $this; |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * @param string[] $fields |
| 468 | * @return SearchQueryBuilder |
| 469 | */ |
| 470 | public function setExtraFieldsToExtract( array $fields ): SearchQueryBuilder { |
| 471 | $this->extraFieldsToExtract = $fields; |
| 472 | return $this; |
| 473 | } |
| 474 | |
| 475 | public function setProvideAllSnippets( bool $shouldProvide ): SearchQueryBuilder { |
| 476 | $this->provideAllSnippets = $shouldProvide; |
| 477 | return $this; |
| 478 | } |
| 479 | } |