mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/AbuseFilter.git
synced 2024-12-11 05:36:09 +00:00
275 lines
8.2 KiB
PHP
275 lines
8.2 KiB
PHP
<?php
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namespace MediaWiki\Extension\AbuseFilter;
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use ManualLogEntry;
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use MediaWiki\Extension\AbuseFilter\ChangeTags\ChangeTagsManager;
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use MediaWiki\Extension\AbuseFilter\Consequences\ConsequencesRegistry;
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use MediaWiki\Extension\AbuseFilter\Filter\Filter;
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use MediaWiki\Extension\AbuseFilter\Special\SpecialAbuseFilter;
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use MediaWiki\Permissions\Authority;
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use MediaWiki\User\UserIdentity;
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use Status;
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use Wikimedia\Rdbms\ILoadBalancer;
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/**
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* @internal
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*/
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class FilterStore {
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public const SERVICE_NAME = 'AbuseFilterFilterStore';
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/** @var ConsequencesRegistry */
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private $consequencesRegistry;
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/** @var ILoadBalancer */
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private $loadBalancer;
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/** @var FilterProfiler */
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private $filterProfiler;
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/** @var FilterLookup */
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private $filterLookup;
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/** @var ChangeTagsManager */
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private $tagsManager;
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/** @var FilterValidator */
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private $filterValidator;
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/** @var FilterCompare */
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private $filterCompare;
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/** @var EmergencyCache */
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private $emergencyCache;
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/**
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* @param ConsequencesRegistry $consequencesRegistry
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* @param ILoadBalancer $loadBalancer
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* @param FilterProfiler $filterProfiler
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* @param FilterLookup $filterLookup
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* @param ChangeTagsManager $tagsManager
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* @param FilterValidator $filterValidator
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* @param FilterCompare $filterCompare
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* @param EmergencyCache $emergencyCache
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*/
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public function __construct(
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ConsequencesRegistry $consequencesRegistry,
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ILoadBalancer $loadBalancer,
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FilterProfiler $filterProfiler,
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FilterLookup $filterLookup,
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ChangeTagsManager $tagsManager,
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FilterValidator $filterValidator,
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FilterCompare $filterCompare,
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EmergencyCache $emergencyCache
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) {
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$this->consequencesRegistry = $consequencesRegistry;
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$this->loadBalancer = $loadBalancer;
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$this->filterProfiler = $filterProfiler;
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$this->filterLookup = $filterLookup;
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$this->tagsManager = $tagsManager;
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$this->filterValidator = $filterValidator;
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$this->filterCompare = $filterCompare;
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$this->emergencyCache = $emergencyCache;
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}
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/**
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* Checks whether user input for the filter editing form is valid and if so saves the filter.
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* Returns a Status object which can be:
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* - Good with [ new_filter_id, history_id ] as value if the filter was successfully saved
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* - Good with value = false if everything went fine but the filter is unchanged
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* - OK with errors if a validation error occurred
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* - Fatal in case of a permission-related error
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*
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* @param Authority $performer
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* @param int|null $filterId
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* @param Filter $newFilter
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* @param Filter $originalFilter
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* @return Status
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*/
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public function saveFilter(
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Authority $performer,
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?int $filterId,
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Filter $newFilter,
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Filter $originalFilter
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): Status {
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$validationStatus = $this->filterValidator->checkAll( $newFilter, $originalFilter, $performer );
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if ( !$validationStatus->isGood() ) {
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return $validationStatus;
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}
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// Check for non-changes
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$differences = $this->filterCompare->compareVersions( $newFilter, $originalFilter );
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if ( !$differences ) {
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return Status::newGood( false );
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}
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// Everything went fine, so let's save the filter
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$wasGlobal = $originalFilter->isGlobal();
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[ $newID, $historyID ] = $this->doSaveFilter(
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$performer->getUser(), $newFilter, $differences, $filterId, $wasGlobal );
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return Status::newGood( [ $newID, $historyID ] );
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}
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/**
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* Saves new filter's info to DB
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*
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* @param UserIdentity $userIdentity
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* @param Filter $newFilter
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* @param array $differences
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* @param int|null $filterId
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* @param bool $wasGlobal
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* @return int[] first element is new ID, second is history ID
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*/
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private function doSaveFilter(
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UserIdentity $userIdentity,
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Filter $newFilter,
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array $differences,
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?int $filterId,
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bool $wasGlobal
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): array {
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$dbw = $this->loadBalancer->getConnectionRef( DB_PRIMARY );
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$newRow = $this->filterToDatabaseRow( $newFilter );
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// Set last modifier.
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$newRow['af_timestamp'] = $dbw->timestamp();
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$newRow['af_user'] = $userIdentity->getId();
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$newRow['af_user_text'] = $userIdentity->getName();
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$isNew = $filterId === null;
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// Preserve the old throttled status (if any) only if disabling the filter.
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// TODO: It might make more sense to check what was actually changed
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$newRow['af_throttled'] = ( $newRow['af_throttled'] ?? false ) && !$newRow['af_enabled'];
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// This is null when creating a new filter, but the DB field is NOT NULL
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$newRow['af_hit_count'] = $newRow['af_hit_count'] ?? 0;
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$rowForInsert = array_diff_key( $newRow, [ 'af_id' => true ] );
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$dbw->startAtomic( __METHOD__ );
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if ( $filterId === null ) {
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$dbw->insert( 'abuse_filter', $rowForInsert, __METHOD__ );
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$filterId = $dbw->insertId();
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} else {
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$dbw->update( 'abuse_filter', $rowForInsert, [ 'af_id' => $filterId ], __METHOD__ );
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}
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$newRow['af_id'] = $filterId;
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$actions = $newFilter->getActions();
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$actionsRows = [];
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foreach ( $this->consequencesRegistry->getAllEnabledActionNames() as $action ) {
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if ( !isset( $actions[$action] ) ) {
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continue;
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}
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$parameters = $actions[$action];
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if ( $action === 'throttle' && $parameters[0] === null ) {
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// FIXME: Do we really need to keep the filter ID inside throttle parameters?
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// We'd save space, keep things simpler and avoid this hack. Note: if removing
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// it, a maintenance script will be necessary to clean up the table.
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$parameters[0] = $filterId;
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}
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$actionsRows[] = [
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'afa_filter' => $filterId,
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'afa_consequence' => $action,
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'afa_parameters' => implode( "\n", $parameters ),
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];
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}
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// Create a history row
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$afhRow = [];
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foreach ( AbuseFilter::HISTORY_MAPPINGS as $afCol => $afhCol ) {
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$afhRow[$afhCol] = $newRow[$afCol];
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}
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$afhRow['afh_actions'] = serialize( $actions );
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$afhRow['afh_changed_fields'] = implode( ',', $differences );
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$flags = [];
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if ( $newRow['af_hidden'] ) {
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$flags[] = 'hidden';
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}
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if ( $newRow['af_enabled'] ) {
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$flags[] = 'enabled';
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}
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if ( $newRow['af_deleted'] ) {
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$flags[] = 'deleted';
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}
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if ( $newRow['af_global'] ) {
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$flags[] = 'global';
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}
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$afhRow['afh_flags'] = implode( ',', $flags );
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$afhRow['afh_filter'] = $filterId;
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// Do the update
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$dbw->insert( 'abuse_filter_history', $afhRow, __METHOD__ );
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$historyID = $dbw->insertId();
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if ( !$isNew ) {
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$dbw->delete(
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'abuse_filter_action',
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[ 'afa_filter' => $filterId ],
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__METHOD__
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);
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}
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$dbw->insert( 'abuse_filter_action', $actionsRows, __METHOD__ );
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$dbw->endAtomic( __METHOD__ );
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// Invalidate cache if this was a global rule
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if ( $wasGlobal || $newRow['af_global'] ) {
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$this->filterLookup->purgeGroupWANCache( $newRow['af_group'] );
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}
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// Logging
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$logEntry = new ManualLogEntry( 'abusefilter', $isNew ? 'create' : 'modify' );
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$logEntry->setPerformer( $userIdentity );
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$logEntry->setTarget( SpecialAbuseFilter::getTitleForSubpage( (string)$filterId ) );
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$logEntry->setParameters( [
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'historyId' => $historyID,
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'newId' => $filterId
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] );
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$logid = $logEntry->insert( $dbw );
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$logEntry->publish( $logid );
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// Purge the tag list cache so the fetchAllTags hook applies tag changes
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if ( isset( $actions['tag'] ) ) {
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$this->tagsManager->purgeTagCache();
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}
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$this->filterProfiler->resetFilterProfile( $filterId );
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if ( $newRow['af_enabled'] ) {
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$this->emergencyCache->setNewForFilter( $filterId, $newRow['af_group'] );
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}
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return [ $filterId, $historyID ];
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}
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/**
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* @todo Perhaps add validation to ensure no null values remained.
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* @param Filter $filter
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* @return array
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*/
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private function filterToDatabaseRow( Filter $filter ): array {
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// T67807: integer 1's & 0's might be better understood than booleans
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return [
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'af_id' => $filter->getID(),
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'af_pattern' => $filter->getRules(),
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'af_public_comments' => $filter->getName(),
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'af_comments' => $filter->getComments(),
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'af_group' => $filter->getGroup(),
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'af_actions' => implode( ',', $filter->getActionsNames() ),
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'af_enabled' => (int)$filter->isEnabled(),
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'af_deleted' => (int)$filter->isDeleted(),
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'af_hidden' => (int)$filter->isHidden(),
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'af_global' => (int)$filter->isGlobal(),
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'af_user' => $filter->getUserID(),
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'af_user_text' => $filter->getUserName(),
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'af_timestamp' => $filter->getTimestamp(),
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'af_hit_count' => $filter->getHitCount(),
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'af_throttled' => (int)$filter->isThrottled(),
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];
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}
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}
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