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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch\Search; |
| 4 | |
| 5 | use BaseSearchResultSet; |
| 6 | use HtmlArmor; |
| 7 | use ISearchResultSet; |
| 8 | use MediaWiki\MediaWikiServices; |
| 9 | use SearchResult; |
| 10 | use SearchResultSetTrait; |
| 11 | use Title; |
| 12 | use Wikimedia\Assert\Assert; |
| 13 | |
| 14 | /** |
| 15 | * A set of results from Elasticsearch. |
| 16 | * Extending this class from another extension is not supported, use BaseCirrusSearchResultSet |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License as published by |
| 20 | * the Free Software Foundation; either version 2 of the License, or |
| 21 | * (at your option) any later version. |
| 22 | * |
| 23 | * This program is distributed in the hope that it will be useful, |
| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 | * GNU General Public License for more details. |
| 27 | * |
| 28 | * You should have received a copy of the GNU General Public License along |
| 29 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 30 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 31 | * http://www.gnu.org/copyleft/gpl.html |
| 32 | * @deprecated use a subclass of BaseCirrusSearchResultSet |
| 33 | */ |
| 34 | class ResultSet extends BaseSearchResultSet implements CirrusSearchResultSet { |
| 35 | use SearchResultSetTrait; |
| 36 | |
| 37 | /** |
| 38 | * @var \Elastica\ResultSet |
| 39 | */ |
| 40 | private $result; |
| 41 | |
| 42 | /** |
| 43 | * @var string|null |
| 44 | */ |
| 45 | private $suggestionQuery; |
| 46 | |
| 47 | /** |
| 48 | * @var HtmlArmor|string|null |
| 49 | */ |
| 50 | private $suggestionSnippet; |
| 51 | |
| 52 | /** |
| 53 | * @var array |
| 54 | */ |
| 55 | private $interwikiResults = []; |
| 56 | |
| 57 | /** |
| 58 | * @var string|null |
| 59 | */ |
| 60 | private $rewrittenQuery; |
| 61 | |
| 62 | /** |
| 63 | * @var HtmlArmor|string|null |
| 64 | */ |
| 65 | private $rewrittenQuerySnippet; |
| 66 | /** |
| 67 | * @var SearchResult[] |
| 68 | */ |
| 69 | protected $results; |
| 70 | |
| 71 | /** |
| 72 | * @var bool |
| 73 | */ |
| 74 | private $hasMoreResults = false; |
| 75 | |
| 76 | /** |
| 77 | * @var bool |
| 78 | */ |
| 79 | private $searchContainedSyntax; |
| 80 | |
| 81 | /** |
| 82 | * @var FullTextCirrusSearchResultBuilder |
| 83 | */ |
| 84 | private $resultBuilder; |
| 85 | |
| 86 | /** |
| 87 | * @var TitleHelper |
| 88 | */ |
| 89 | private $titleHelper; |
| 90 | |
| 91 | /** |
| 92 | * @param bool $searchContainedSyntax |
| 93 | * @param \Elastica\ResultSet|null $elasticResultSet |
| 94 | * @param TitleHelper|null $titleHelper |
| 95 | * @deprecated use a subclass of BaseCirrusSearchResultSet |
| 96 | */ |
| 97 | public function __construct( |
| 98 | $searchContainedSyntax = false, |
| 99 | \Elastica\ResultSet $elasticResultSet = null, |
| 100 | TitleHelper $titleHelper = null |
| 101 | ) { |
| 102 | $this->searchContainedSyntax = $searchContainedSyntax; |
| 103 | $this->result = $elasticResultSet; |
| 104 | $this->titleHelper = $titleHelper ?: new TitleHelper(); |
| 105 | $this->resultBuilder = new FullTextCirrusSearchResultBuilder( $this->titleHelper, [] ); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @param string $suggestionQuery |
| 110 | * @param HtmlArmor|string|null $suggestionSnippet |
| 111 | */ |
| 112 | public function setSuggestionQuery( string $suggestionQuery, $suggestionSnippet = null ) { |
| 113 | $this->suggestionQuery = $suggestionQuery; |
| 114 | $this->suggestionSnippet = $suggestionSnippet ?? $suggestionQuery; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Some search modes return a total hit count for the query |
| 119 | * in the entire article database. This may include pages |
| 120 | * in namespaces that would not be matched on the given |
| 121 | * settings. |
| 122 | * |
| 123 | * Return null if no total hits number is supported. |
| 124 | * |
| 125 | * @return int|null |
| 126 | */ |
| 127 | public function getTotalHits() { |
| 128 | $elasticaResultSet = $this->getElasticaResultSet(); |
| 129 | if ( $elasticaResultSet !== null ) { |
| 130 | return $elasticaResultSet->getTotalHits(); |
| 131 | } |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Loads the result set into the mediawiki LinkCache via a |
| 137 | * batch query. By pre-caching this we ensure methods such as |
| 138 | * Result::isMissingRevision() don't trigger a query for each and |
| 139 | * every search result. |
| 140 | * |
| 141 | * @param \Elastica\ResultSet $resultSet Result set from which the titles come |
| 142 | */ |
| 143 | protected function preCacheContainedTitles( \Elastica\ResultSet $resultSet ) { |
| 144 | // We can only pull in information about the local wiki |
| 145 | $lb = MediaWikiServices::getInstance()->getLinkBatchFactory()->newLinkBatch(); |
| 146 | foreach ( $resultSet->getResults() as $result ) { |
| 147 | if ( !$this->titleHelper->isExternal( $result ) ) { |
| 148 | $lb->add( $result->namespace, $result->title ); |
| 149 | } |
| 150 | } |
| 151 | if ( !$lb->isEmpty() ) { |
| 152 | $lb->setCaller( __METHOD__ ); |
| 153 | $lb->execute(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * @return bool |
| 159 | */ |
| 160 | public function hasSuggestion() { |
| 161 | return $this->suggestionQuery !== null; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * @return string|null |
| 166 | */ |
| 167 | public function getSuggestionQuery() { |
| 168 | return $this->suggestionQuery; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * @return HtmlArmor|string|null Null is only returned if suggestion query is also null |
| 173 | */ |
| 174 | public function getSuggestionSnippet() { |
| 175 | return $this->suggestionSnippet; |
| 176 | } |
| 177 | |
| 178 | public function extractResults() { |
| 179 | if ( $this->results === null ) { |
| 180 | $this->results = []; |
| 181 | if ( $this->result !== null ) { |
| 182 | $this->preCacheContainedTitles( $this->result ); |
| 183 | foreach ( $this->result->getResults() as $result ) { |
| 184 | $transformed = $this->transformOneResult( $result ); |
| 185 | $this->augmentResult( $transformed ); |
| 186 | $this->results[] = $transformed; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | return $this->results; |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * @param \Elastica\Result $result Result from search engine |
| 195 | * @return CirrusSearchResult Elasticsearch result transformed into mediawiki |
| 196 | * search result object. |
| 197 | */ |
| 198 | protected function transformOneResult( \Elastica\Result $result ) { |
| 199 | return $this->resultBuilder->build( $result ); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * @param CirrusSearchResultSet $res |
| 204 | * @param int $type One of SearchResultSet::* constants |
| 205 | * @param string $interwiki |
| 206 | */ |
| 207 | public function addInterwikiResults( CirrusSearchResultSet $res, $type, $interwiki ) { |
| 208 | $this->interwikiResults[$type][$interwiki] = $res; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * @param int $type |
| 213 | * @return ISearchResultSet[] |
| 214 | */ |
| 215 | public function getInterwikiResults( $type = self::SECONDARY_RESULTS ) { |
| 216 | return $this->interwikiResults[$type] ?? []; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * @param int $type |
| 221 | * @return bool |
| 222 | */ |
| 223 | public function hasInterwikiResults( $type = self::SECONDARY_RESULTS ) { |
| 224 | return isset( $this->interwikiResults[$type] ); |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * @param string $newQuery |
| 229 | * @param HtmlArmor|string|null $newQuerySnippet |
| 230 | */ |
| 231 | public function setRewrittenQuery( string $newQuery, $newQuerySnippet = null ) { |
| 232 | $this->rewrittenQuery = $newQuery; |
| 233 | $this->rewrittenQuerySnippet = $newQuerySnippet ?? $newQuery; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * @return bool |
| 238 | */ |
| 239 | public function hasRewrittenQuery() { |
| 240 | return $this->rewrittenQuery !== null; |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * @return string|null |
| 245 | */ |
| 246 | public function getQueryAfterRewrite() { |
| 247 | return $this->rewrittenQuery; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * @return HtmlArmor|string|null |
| 252 | */ |
| 253 | public function getQueryAfterRewriteSnippet() { |
| 254 | return $this->rewrittenQuerySnippet; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * @return \Elastica\Response|null |
| 259 | */ |
| 260 | public function getElasticResponse() { |
| 261 | return $this->result != null ? $this->result->getResponse() : null; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * @return \Elastica\ResultSet|null |
| 266 | */ |
| 267 | public function getElasticaResultSet() { |
| 268 | return $this->result; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * Count elements of an object |
| 273 | * @link https://php.net/manual/en/countable.count.php |
| 274 | * @return int The custom count as an integer. |
| 275 | * @since 5.1.0 |
| 276 | */ |
| 277 | public function count(): int { |
| 278 | return count( $this->extractResults() ); |
| 279 | } |
| 280 | |
| 281 | /** |
| 282 | * @return int |
| 283 | */ |
| 284 | public function numRows() { |
| 285 | return $this->count(); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Did the search contain search syntax? If so, Special:Search won't offer |
| 290 | * the user a link to a create a page named by the search string because the |
| 291 | * name would contain the search syntax. |
| 292 | * @return bool |
| 293 | */ |
| 294 | public function searchContainedSyntax() { |
| 295 | return $this->searchContainedSyntax; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * @return bool True when there are more pages of search results available. |
| 300 | */ |
| 301 | public function hasMoreResults() { |
| 302 | return $this->hasMoreResults; |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * @param int $limit Shrink result set to $limit and flag |
| 307 | * if more results are available. |
| 308 | */ |
| 309 | public function shrink( $limit ) { |
| 310 | if ( $this->count() > $limit ) { |
| 311 | Assert::precondition( $this->results !== null, "results not initialized" ); |
| 312 | $this->results = array_slice( $this->results, 0, $limit ); |
| 313 | $this->hasMoreResults = true; |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Extract all the titles in the result set. |
| 319 | * @return Title[] |
| 320 | */ |
| 321 | public function extractTitles() { |
| 322 | return array_map( |
| 323 | static function ( SearchResult $result ) { |
| 324 | return $result->getTitle(); |
| 325 | }, |
| 326 | $this->extractResults() ); |
| 327 | } |
| 328 | } |