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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\AbuseFilter\Consequences; |
| 4 | |
| 5 | use MediaWiki\Extension\AbuseFilter\CentralDBManager; |
| 6 | use MediaWiki\Extension\AbuseFilter\GlobalNameUtils; |
| 7 | use Psr\Log\LoggerInterface; |
| 8 | use Wikimedia\Rdbms\IReadableDatabase; |
| 9 | use Wikimedia\Rdbms\LBFactory; |
| 10 | |
| 11 | /** |
| 12 | * Class for retrieving actions and parameters from the database |
| 13 | * @todo Can we better integrate this with FilterLookup? |
| 14 | */ |
| 15 | class ConsequencesLookup { |
| 16 | public const SERVICE_NAME = 'AbuseFilterConsequencesLookup'; |
| 17 | |
| 18 | /** @var LBFactory */ |
| 19 | private $lbFactory; |
| 20 | /** @var CentralDBManager */ |
| 21 | private $centralDBManager; |
| 22 | /** @var ConsequencesRegistry */ |
| 23 | private $consequencesRegistry; |
| 24 | /** @var LoggerInterface */ |
| 25 | private $logger; |
| 26 | |
| 27 | /** |
| 28 | * @param LBFactory $lbFactory |
| 29 | * @param CentralDBManager $centralDBManager |
| 30 | * @param ConsequencesRegistry $consequencesRegistry |
| 31 | * @param LoggerInterface $logger |
| 32 | */ |
| 33 | public function __construct( |
| 34 | LBFactory $lbFactory, |
| 35 | CentralDBManager $centralDBManager, |
| 36 | ConsequencesRegistry $consequencesRegistry, |
| 37 | LoggerInterface $logger |
| 38 | ) { |
| 39 | $this->lbFactory = $lbFactory; |
| 40 | $this->centralDBManager = $centralDBManager; |
| 41 | $this->consequencesRegistry = $consequencesRegistry; |
| 42 | $this->logger = $logger; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * @param array<int|string> $filters |
| 47 | * @return array[][] |
| 48 | */ |
| 49 | public function getConsequencesForFilters( array $filters ): array { |
| 50 | $globalFilters = []; |
| 51 | $localFilters = []; |
| 52 | |
| 53 | foreach ( $filters as $filter ) { |
| 54 | [ $filterID, $global ] = GlobalNameUtils::splitGlobalName( $filter ); |
| 55 | |
| 56 | if ( $global ) { |
| 57 | $globalFilters[] = $filterID; |
| 58 | } else { |
| 59 | $localFilters[] = (int)$filter; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | // Load local filter info |
| 64 | $dbr = $this->lbFactory->getReplicaDatabase(); |
| 65 | // Retrieve the consequences. |
| 66 | $consequences = []; |
| 67 | |
| 68 | if ( count( $localFilters ) ) { |
| 69 | $consequences = $this->loadConsequencesFromDB( $dbr, $localFilters ); |
| 70 | } |
| 71 | |
| 72 | if ( count( $globalFilters ) ) { |
| 73 | $consequences += $this->loadConsequencesFromDB( |
| 74 | $this->centralDBManager->getConnection( DB_REPLICA ), |
| 75 | $globalFilters, |
| 76 | GlobalNameUtils::GLOBAL_FILTER_PREFIX |
| 77 | ); |
| 78 | } |
| 79 | |
| 80 | return $consequences; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * @param IReadableDatabase $dbr |
| 85 | * @param int[] $filters |
| 86 | * @param string $prefix |
| 87 | * @return array[][] |
| 88 | */ |
| 89 | private function loadConsequencesFromDB( IReadableDatabase $dbr, array $filters, string $prefix = '' ): array { |
| 90 | $actionsByFilter = []; |
| 91 | foreach ( $filters as $filter ) { |
| 92 | $actionsByFilter[$prefix . $filter] = []; |
| 93 | } |
| 94 | |
| 95 | $res = $dbr->select( |
| 96 | [ 'abuse_filter_action', 'abuse_filter' ], |
| 97 | '*', |
| 98 | [ 'af_id' => $filters ], |
| 99 | __METHOD__, |
| 100 | [], |
| 101 | [ 'abuse_filter_action' => [ 'LEFT JOIN', 'afa_filter=af_id' ] ] |
| 102 | ); |
| 103 | |
| 104 | $dangerousActions = $this->consequencesRegistry->getDangerousActionNames(); |
| 105 | // Categorise consequences by filter. |
| 106 | foreach ( $res as $row ) { |
| 107 | if ( $row->af_throttled |
| 108 | && in_array( $row->afa_consequence, $dangerousActions ) |
| 109 | ) { |
| 110 | // Don't do the action, just log |
| 111 | $this->logger->info( |
| 112 | 'Filter {filter_id} is throttled, skipping action: {action}', |
| 113 | [ |
| 114 | 'filter_id' => $row->af_id, |
| 115 | 'action' => $row->afa_consequence |
| 116 | ] |
| 117 | ); |
| 118 | } elseif ( $row->afa_filter !== $row->af_id ) { |
| 119 | // We probably got a NULL, as it's a LEFT JOIN. Don't add it. |
| 120 | continue; |
| 121 | } else { |
| 122 | $actionsByFilter[$prefix . $row->afa_filter][$row->afa_consequence] = |
| 123 | $row->afa_parameters !== '' ? explode( "\n", $row->afa_parameters ) : []; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | return $actionsByFilter; |
| 128 | } |
| 129 | |
| 130 | } |