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| 1 | <?php |
| 2 | |
| 3 | namespace GrowthExperiments\NewcomerTasks\AddLink; |
| 4 | |
| 5 | use GrowthExperiments\ErrorException; |
| 6 | use GrowthExperiments\NewcomerTasks\ConfigurationLoader\ConfigurationLoader; |
| 7 | use GrowthExperiments\NewcomerTasks\TaskType\LinkRecommendationTaskType; |
| 8 | use GrowthExperiments\NewcomerTasks\TaskType\LinkRecommendationTaskTypeHandler; |
| 9 | use GrowthExperiments\Util; |
| 10 | use GrowthExperiments\WikiConfigException; |
| 11 | use MediaWiki\Deferred\DeferredUpdates; |
| 12 | use MediaWiki\Linker\LinkTarget; |
| 13 | use MediaWiki\Page\ProperPageIdentity; |
| 14 | use StatusValue; |
| 15 | use Wikimedia\Rdbms\IDBAccessObject; |
| 16 | |
| 17 | /** |
| 18 | * Shared functionality for various classes that consume link recommendations. |
| 19 | */ |
| 20 | class LinkRecommendationHelper { |
| 21 | |
| 22 | /** @var ConfigurationLoader */ |
| 23 | private $configurationLoader; |
| 24 | |
| 25 | /** @var LinkRecommendationProvider */ |
| 26 | private $linkRecommendationProvider; |
| 27 | |
| 28 | /** @var LinkRecommendationStore */ |
| 29 | private $linkRecommendationStore; |
| 30 | |
| 31 | /** |
| 32 | * @var callable returning {@link \CirrusSearch\WeightedTagsUpdater} |
| 33 | */ |
| 34 | private $weightedTagsUpdaterProvider; |
| 35 | |
| 36 | /** |
| 37 | * @param ConfigurationLoader $configurationLoader |
| 38 | * @param LinkRecommendationProvider $linkRecommendationProvider |
| 39 | * @param LinkRecommendationStore $linkRecommendationStore |
| 40 | * @param callable(): \CirrusSearch\WeightedTagsUpdater $weightedTagsUpdaterProvider |
| 41 | */ |
| 42 | public function __construct( |
| 43 | ConfigurationLoader $configurationLoader, |
| 44 | LinkRecommendationProvider $linkRecommendationProvider, |
| 45 | LinkRecommendationStore $linkRecommendationStore, |
| 46 | callable $weightedTagsUpdaterProvider |
| 47 | ) { |
| 48 | $this->configurationLoader = $configurationLoader; |
| 49 | $this->linkRecommendationProvider = $linkRecommendationProvider; |
| 50 | $this->linkRecommendationStore = $linkRecommendationStore; |
| 51 | $this->weightedTagsUpdaterProvider = $weightedTagsUpdaterProvider; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Return the link recommendation stored for the given title. |
| 56 | * Returns null when all links of the recommendation are invalid. |
| 57 | * @param LinkTarget $title |
| 58 | * @return LinkRecommendation|null |
| 59 | * @throws ErrorException |
| 60 | */ |
| 61 | public function getLinkRecommendation( LinkTarget $title ): ?LinkRecommendation { |
| 62 | $taskTypeId = LinkRecommendationTaskTypeHandler::TASK_TYPE_ID; |
| 63 | $taskType = $this->configurationLoader->getTaskTypes()[$taskTypeId] ?? null; |
| 64 | if ( !$taskType ) { |
| 65 | throw $this->configError( "No such task type: $taskTypeId" ); |
| 66 | } elseif ( !$taskType instanceof LinkRecommendationTaskType ) { |
| 67 | throw $this->configError( "Not a link recommendation task type: $taskTypeId" ); |
| 68 | } |
| 69 | $linkRecommendation = $this->linkRecommendationProvider->get( $title, $taskType ); |
| 70 | if ( $linkRecommendation instanceof StatusValue ) { |
| 71 | throw new ErrorException( $linkRecommendation ); |
| 72 | } |
| 73 | return $linkRecommendation; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Delete recommendations for a given page from the database and optionally from the search index. |
| 78 | * @param ProperPageIdentity $pageIdentity |
| 79 | * @param bool $deleteFromSearchIndex |
| 80 | * @param bool $allowJoiningSearchIndexDeletes if true, then CirrusSearch will join this with |
| 81 | * other events from the revision, waiting for up to 10 minutes |
| 82 | */ |
| 83 | public function deleteLinkRecommendation( |
| 84 | ProperPageIdentity $pageIdentity, |
| 85 | bool $deleteFromSearchIndex, |
| 86 | bool $allowJoiningSearchIndexDeletes = false |
| 87 | ): void { |
| 88 | if ( |
| 89 | $this->linkRecommendationStore->getByPageId( $pageIdentity->getId(), IDBAccessObject::READ_NORMAL ) !== null |
| 90 | ) { |
| 91 | DeferredUpdates::addCallableUpdate( function () use ( $pageIdentity ) { |
| 92 | $this->linkRecommendationStore->deleteByPageIds( [ $pageIdentity->getId() ] ); |
| 93 | } ); |
| 94 | } |
| 95 | if ( $deleteFromSearchIndex ) { |
| 96 | DeferredUpdates::addCallableUpdate( function () use ( $pageIdentity, $allowJoiningSearchIndexDeletes ) { |
| 97 | ( $this->weightedTagsUpdaterProvider )()->resetWeightedTags( |
| 98 | $pageIdentity, |
| 99 | [ LinkRecommendationTaskTypeHandler::WEIGHTED_TAG_PREFIX ], |
| 100 | $allowJoiningSearchIndexDeletes ? 'revision' : null |
| 101 | ); |
| 102 | } ); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * @param string $errorMessage |
| 108 | * @return ErrorException |
| 109 | */ |
| 110 | private function configError( string $errorMessage ): ErrorException { |
| 111 | Util::logException( new WikiConfigException( $errorMessage ) ); |
| 112 | return new ErrorException( StatusValue::newFatal( 'rawmessage', $errorMessage ) ); |
| 113 | } |
| 114 | |
| 115 | } |