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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Formatter; |
| 4 | |
| 5 | use Flow\Data\ManagerGroup; |
| 6 | use Flow\Data\Storage\RevisionStorage; |
| 7 | use Flow\DbFactory; |
| 8 | use Flow\Exception\FlowException; |
| 9 | use Flow\FlowActions; |
| 10 | use Flow\Model\AbstractRevision; |
| 11 | use Flow\Model\UUID; |
| 12 | use Flow\Repository\TreeRepository; |
| 13 | use InvalidArgumentException; |
| 14 | use MediaWiki\Exception\MWExceptionHandler; |
| 15 | use MediaWiki\Pager\ContribsPager; |
| 16 | use MediaWiki\Pager\DeletedContribsPager; |
| 17 | use MediaWiki\User\UserIdentityLookup; |
| 18 | use MediaWiki\WikiMap\WikiMap; |
| 19 | use Wikimedia\Rdbms\IResultWrapper; |
| 20 | use Wikimedia\Rdbms\SelectQueryBuilder; |
| 21 | |
| 22 | class ContributionsQuery extends AbstractQuery { |
| 23 | |
| 24 | /** |
| 25 | * @var DbFactory |
| 26 | */ |
| 27 | protected $dbFactory; |
| 28 | |
| 29 | /** |
| 30 | * @var FlowActions |
| 31 | */ |
| 32 | protected $actions; |
| 33 | |
| 34 | /** @var UserIdentityLookup */ |
| 35 | private $userIdentityLookup; |
| 36 | |
| 37 | /** |
| 38 | * @param ManagerGroup $storage |
| 39 | * @param TreeRepository $treeRepo |
| 40 | * @param DbFactory $dbFactory |
| 41 | * @param FlowActions $actions |
| 42 | * @param UserIdentityLookup $userIdentityLookup |
| 43 | */ |
| 44 | public function __construct( |
| 45 | ManagerGroup $storage, |
| 46 | TreeRepository $treeRepo, |
| 47 | DbFactory $dbFactory, |
| 48 | FlowActions $actions, |
| 49 | UserIdentityLookup $userIdentityLookup |
| 50 | ) { |
| 51 | parent::__construct( $storage, $treeRepo ); |
| 52 | $this->dbFactory = $dbFactory; |
| 53 | $this->actions = $actions; |
| 54 | $this->userIdentityLookup = $userIdentityLookup; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @param ContribsPager|DeletedContribsPager $pager Object hooked into |
| 59 | * @param string $offset Index offset, inclusive |
| 60 | * @param int $limit Exact query limit |
| 61 | * @param bool $descending Query direction, false for ascending, true for descending |
| 62 | * @param array $rangeOffsets Query range, in the format of [ endOffset, startOffset ] |
| 63 | * @return FormatterRow[] |
| 64 | */ |
| 65 | public function getResults( $pager, $offset, $limit, $descending, $rangeOffsets = [] ) { |
| 66 | // When ORES hidenondamaging filter is used, Flow entries should be skipped |
| 67 | // because they are not scored. |
| 68 | if ( $pager->getRequest()->getBool( 'hidenondamaging' ) ) { |
| 69 | return []; |
| 70 | } |
| 71 | |
| 72 | // build DB query conditions |
| 73 | $conditions = $this->buildConditions( $pager, $offset, $descending, $rangeOffsets ); |
| 74 | |
| 75 | $types = [ |
| 76 | // revision class => block type |
| 77 | 'PostRevision' => 'topic', |
| 78 | 'Header' => 'header', |
| 79 | 'PostSummary' => 'topicsummary' |
| 80 | ]; |
| 81 | |
| 82 | $results = []; |
| 83 | foreach ( $types as $revisionClass => $blockType ) { |
| 84 | // query DB for requested revisions |
| 85 | $rows = $this->queryRevisions( $conditions, $limit, $revisionClass ); |
| 86 | |
| 87 | // turn DB data into revision objects |
| 88 | $revisions = $this->loadRevisions( $rows, $revisionClass ); |
| 89 | |
| 90 | $this->loadMetadataBatch( $revisions ); |
| 91 | foreach ( $revisions as $revision ) { |
| 92 | try { |
| 93 | if ( $this->excludeFromContributions( $revision ) ) { |
| 94 | continue; |
| 95 | } |
| 96 | |
| 97 | $result = $pager instanceof ContribsPager ? new ContributionsRow : new DeletedContributionsRow; |
| 98 | $result = $this->buildResult( $revision, $pager->getIndexField(), $result ); |
| 99 | $deleted = $result->currentRevision->isDeleted() || $result->workflow->isDeleted(); |
| 100 | |
| 101 | if ( |
| 102 | $result instanceof ContributionsRow && |
| 103 | ( $deleted || $result->currentRevision->isSuppressed() ) |
| 104 | ) { |
| 105 | // don't show deleted or suppressed entries in Special:Contributions |
| 106 | continue; |
| 107 | } |
| 108 | if ( $result instanceof DeletedContributionsRow && !$deleted ) { |
| 109 | // only show deleted entries in Special:DeletedContributions |
| 110 | continue; |
| 111 | } |
| 112 | |
| 113 | $results[] = $result; |
| 114 | } catch ( FlowException $e ) { |
| 115 | MWExceptionHandler::logException( $e ); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | return $results; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * @param AbstractRevision $revision |
| 125 | * @return bool |
| 126 | */ |
| 127 | private function excludeFromContributions( AbstractRevision $revision ) { |
| 128 | return (bool)$this->actions->getValue( $revision->getChangeType(), 'exclude_from_contributions' ); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * @param ContribsPager|DeletedContribsPager $pager Object hooked into |
| 133 | * @param string $offset Index offset, inclusive |
| 134 | * @param bool $descending Query direction, false for ascending, true for descending |
| 135 | * @param array $rangeOffsets Query range, in the format of [ endOffset, startOffset ] |
| 136 | * @return array Query conditions |
| 137 | */ |
| 138 | protected function buildConditions( $pager, $offset, $descending, $rangeOffsets = [] ) { |
| 139 | $conditions = []; |
| 140 | |
| 141 | $isContribsPager = $pager instanceof ContribsPager; |
| 142 | $userIdentity = $this->userIdentityLookup->getUserIdentityByName( $pager->getTarget() ); |
| 143 | if ( $userIdentity && $userIdentity->isRegistered() ) { |
| 144 | $conditions['rev_user_id'] = $userIdentity->getId(); |
| 145 | $conditions['rev_user_ip'] = null; |
| 146 | } else { |
| 147 | $conditions['rev_user_id'] = 0; |
| 148 | $conditions['rev_user_ip'] = $pager->getTarget(); |
| 149 | } |
| 150 | $conditions['rev_user_wiki'] = WikiMap::getCurrentWikiId(); |
| 151 | |
| 152 | if ( $isContribsPager && $pager->isNewOnly() ) { |
| 153 | $conditions['rev_parent_id'] = null; |
| 154 | $conditions['rev_type'] = 'post'; |
| 155 | } |
| 156 | |
| 157 | $dbr = $this->dbFactory->getDB( DB_REPLICA ); |
| 158 | // Make offset parameter. |
| 159 | if ( $offset ) { |
| 160 | $offsetUUID = UUID::getComparisonUUID( $offset ); |
| 161 | $direction = $descending ? '>' : '<'; |
| 162 | $conditions[] = $dbr->buildComparison( $direction, [ 'rev_id' => $offsetUUID->getBinary() ] ); |
| 163 | } |
| 164 | if ( $rangeOffsets ) { |
| 165 | $endUUID = UUID::getComparisonUUID( $rangeOffsets[0] ); |
| 166 | $conditions[] = $dbr->buildComparison( '<', [ 'rev_id' => $endUUID->getBinary() ] ); |
| 167 | // The DeletedContribsPager is only a ReverseChronologicalPager for now. |
| 168 | if ( count( $rangeOffsets ) > 1 && $rangeOffsets[1] ) { |
| 169 | $startUUID = UUID::getComparisonUUID( $rangeOffsets[1] ); |
| 170 | $conditions[] = $dbr->buildComparison( '>=', [ 'rev_id' => $startUUID->getBinary() ] ); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | // Find only within requested wiki/namespace |
| 175 | $conditions['workflow_wiki'] = WikiMap::getCurrentWikiId(); |
| 176 | if ( $pager->getNamespace() !== '' ) { |
| 177 | $conditions['workflow_namespace'] = $pager->getNamespace(); |
| 178 | } |
| 179 | |
| 180 | return $conditions; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * @param array $conditions |
| 185 | * @param int $limit |
| 186 | * @param string $revisionClass Storage type (e.g. "PostRevision", "Header") |
| 187 | * @return IResultWrapper |
| 188 | */ |
| 189 | protected function queryRevisions( $conditions, $limit, $revisionClass ) { |
| 190 | $dbr = $this->dbFactory->getDB( DB_REPLICA ); |
| 191 | |
| 192 | switch ( $revisionClass ) { |
| 193 | case 'PostRevision': |
| 194 | return $dbr->newSelectQueryBuilder() |
| 195 | ->select( '*' ) |
| 196 | // revisions to find |
| 197 | ->from( 'flow_revision' ) |
| 198 | // resolve to post id |
| 199 | ->join( 'flow_tree_revision', null, 'tree_rev_id = rev_id' ) |
| 200 | // resolve to root post (topic title) |
| 201 | ->join( 'flow_tree_node', null, [ |
| 202 | 'tree_descendant_id = tree_rev_descendant_id' |
| 203 | // the one with max tree_depth will be root, |
| 204 | // which will have the matching workflow id |
| 205 | ] ) |
| 206 | // resolve to workflow, to test if in correct wiki/namespace |
| 207 | ->join( 'flow_workflow', null, 'workflow_id = tree_ancestor_id' ) |
| 208 | ->where( $conditions ) |
| 209 | ->limit( $limit ) |
| 210 | ->orderBy( 'rev_id', SelectQueryBuilder::SORT_DESC ) |
| 211 | ->caller( __METHOD__ ) |
| 212 | ->fetchResultSet(); |
| 213 | |
| 214 | case 'Header': |
| 215 | return $dbr->newSelectQueryBuilder() |
| 216 | ->select( '*' ) |
| 217 | ->from( 'flow_revision' ) |
| 218 | ->join( 'flow_workflow', null, [ 'workflow_id = rev_type_id', 'rev_type' => 'header' ] ) |
| 219 | ->where( $conditions ) |
| 220 | ->limit( $limit ) |
| 221 | ->orderBy( 'rev_id', SelectQueryBuilder::SORT_DESC ) |
| 222 | ->caller( __METHOD__ ) |
| 223 | ->fetchResultSet(); |
| 224 | |
| 225 | case 'PostSummary': |
| 226 | return $dbr->newSelectQueryBuilder() |
| 227 | ->select( '*' ) |
| 228 | ->from( 'flow_revision' ) |
| 229 | ->join( 'flow_tree_node', null, [ 'tree_descendant_id = rev_type_id', 'rev_type' => 'post-summary' ] ) |
| 230 | ->join( 'flow_workflow', null, [ 'workflow_id = tree_ancestor_id' ] ) |
| 231 | ->where( $conditions ) |
| 232 | ->limit( $limit ) |
| 233 | ->orderBy( 'rev_id', SelectQueryBuilder::SORT_DESC ) |
| 234 | ->caller( __METHOD__ ) |
| 235 | ->fetchResultSet(); |
| 236 | |
| 237 | default: |
| 238 | throw new InvalidArgumentException( 'Unsupported revision type ' . $revisionClass ); |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * Turns DB data into revision objects. |
| 244 | * |
| 245 | * @param IResultWrapper $rows |
| 246 | * @param string $revisionClass Class of revision object to build: PostRevision|Header |
| 247 | * @return array |
| 248 | */ |
| 249 | protected function loadRevisions( IResultWrapper $rows, $revisionClass ) { |
| 250 | $revisions = []; |
| 251 | foreach ( $rows as $row ) { |
| 252 | $revisions[UUID::create( $row->rev_id )->getAlphadecimal()] = (array)$row; |
| 253 | } |
| 254 | |
| 255 | // get content in external storage |
| 256 | $res = [ $revisions ]; |
| 257 | $res = RevisionStorage::mergeExternalContent( $res ); |
| 258 | $revisions = reset( $res ); |
| 259 | |
| 260 | // we have all required data to build revision |
| 261 | $mapper = $this->storage->getStorage( $revisionClass )->getMapper(); |
| 262 | $revisions = array_map( [ $mapper, 'fromStorageRow' ], $revisions ); |
| 263 | |
| 264 | // @todo: we may already be able to build workflowCache (and rootPostIdCache) from this DB data |
| 265 | |
| 266 | return $revisions; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * When retrieving revisions from DB, self::mergeExternalContent will be |
| 271 | * called to fetch the content. This could fail, resulting in the content |
| 272 | * being a 'false' value. |
| 273 | * |
| 274 | * @inheritDoc |
| 275 | */ |
| 276 | public function validate( array $row ) { |
| 277 | return !isset( $row['rev_content'] ) || $row['rev_content'] !== false; |
| 278 | } |
| 279 | } |