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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Formatter; |
| 4 | |
| 5 | use Flow\Data\ManagerGroup; |
| 6 | use Flow\Exception\FlowException; |
| 7 | use Flow\Exception\InvalidDataException; |
| 8 | use Flow\Model\AbstractRevision; |
| 9 | use Flow\Model\PostRevision; |
| 10 | use Flow\Model\PostSummary; |
| 11 | use Flow\Model\TopicListEntry; |
| 12 | use Flow\Model\UUID; |
| 13 | use Flow\Repository\TreeRepository; |
| 14 | use Flow\RevisionActionPermissions; |
| 15 | use Flow\WatchedTopicItems; |
| 16 | use MediaWiki\Json\FormatJson; |
| 17 | |
| 18 | class TopicListQuery extends AbstractQuery { |
| 19 | |
| 20 | /** @var RevisionActionPermissions */ |
| 21 | protected $permissions; |
| 22 | /** @var WatchedTopicItems */ |
| 23 | protected $watchedTopicItems; |
| 24 | |
| 25 | /** |
| 26 | * @param ManagerGroup $storage |
| 27 | * @param TreeRepository $treeRepository |
| 28 | * @param RevisionActionPermissions $permissions |
| 29 | * @param WatchedTopicItems $watchedTopicItems |
| 30 | */ |
| 31 | public function __construct( |
| 32 | ManagerGroup $storage, |
| 33 | TreeRepository $treeRepository, |
| 34 | RevisionActionPermissions $permissions, |
| 35 | WatchedTopicItems $watchedTopicItems |
| 36 | ) { |
| 37 | parent::__construct( $storage, $treeRepository ); |
| 38 | $this->permissions = $permissions; |
| 39 | $this->watchedTopicItems = $watchedTopicItems; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * @param UUID[]|TopicListEntry[] $topicIdsOrEntries |
| 44 | * @return FormatterRow[] |
| 45 | * @suppress PhanUndeclaredMethod Types not inferred from instanceof |
| 46 | */ |
| 47 | public function getResults( array $topicIdsOrEntries ) { |
| 48 | $topicIds = $this->getTopicIds( $topicIdsOrEntries ); |
| 49 | $allPostIds = $this->collectPostIds( $topicIds ); |
| 50 | $topicSummary = $this->collectSummary( $topicIds ); |
| 51 | $posts = $this->collectRevisions( $allPostIds ); |
| 52 | $watchStatus = $this->collectWatchStatus( $topicIds ); |
| 53 | |
| 54 | $missing = array_diff( |
| 55 | array_keys( $allPostIds ), |
| 56 | array_keys( $posts ) |
| 57 | ); |
| 58 | if ( $missing ) { |
| 59 | throw new InvalidDataException( |
| 60 | 'Failed to load latest revision for post IDs: ' . FormatJson::encode( $missing ), |
| 61 | 'fail-load-data' |
| 62 | ); |
| 63 | } |
| 64 | |
| 65 | $this->loadMetadataBatch( $posts ); |
| 66 | $results = []; |
| 67 | $replies = []; |
| 68 | foreach ( $posts as $post ) { |
| 69 | try { |
| 70 | if ( !$this->permissions->isAllowed( $post, 'view' ) ) { |
| 71 | continue; |
| 72 | } |
| 73 | $row = new TopicRow; |
| 74 | $this->buildResult( $post, null, $row ); |
| 75 | /** @var PostRevision $revision */ |
| 76 | $revision = $row->revision; |
| 77 | $replyToId = $revision->getReplyToId(); |
| 78 | $replyToId = $replyToId ? $replyToId->getAlphadecimal() : null; |
| 79 | $postId = $revision->getPostId()->getAlphadecimal(); |
| 80 | $replies[$replyToId] = $postId; |
| 81 | if ( $post->isTopicTitle() ) { |
| 82 | // Attach the summary |
| 83 | if ( isset( $topicSummary[$postId] ) ) { |
| 84 | $row->summary = $this->buildResult( $topicSummary[$postId], 'rev_id' ); |
| 85 | } |
| 86 | // Attach the watch status |
| 87 | if ( isset( $watchStatus[$postId] ) && $watchStatus[$postId] ) { |
| 88 | $row->isWatched = true; |
| 89 | } |
| 90 | } |
| 91 | $results[] = $row; |
| 92 | } catch ( FlowException $e ) { |
| 93 | \MWExceptionHandler::logException( $e ); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | foreach ( $results as $result ) { |
| 98 | $alpha = $result->revision->getPostId()->getAlphadecimal(); |
| 99 | $result->replies = $replies[$alpha] ?? []; |
| 100 | } |
| 101 | |
| 102 | return $results; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * @param TopicListEntry[]|UUID[] $topicsIdsOrEntries Topic IDs as UUID entries or |
| 107 | * TopicListEntry objects |
| 108 | * @return UUID[] |
| 109 | */ |
| 110 | protected function getTopicIds( array $topicsIdsOrEntries ) { |
| 111 | $topicIds = []; |
| 112 | foreach ( $topicsIdsOrEntries as $entry ) { |
| 113 | if ( $entry instanceof UUID ) { |
| 114 | $topicIds[] = $entry; |
| 115 | } elseif ( $entry instanceof TopicListEntry ) { |
| 116 | $topicIds[] = $entry->getId(); |
| 117 | } |
| 118 | } |
| 119 | return $topicIds; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * @param UUID[] $topicIds |
| 124 | * @return UUID[] Indexed by alphadecimal representation |
| 125 | */ |
| 126 | protected function collectPostIds( array $topicIds ) { |
| 127 | if ( !$topicIds ) { |
| 128 | return []; |
| 129 | } |
| 130 | // Get the full list of postId's necessary |
| 131 | $nodeList = $this->treeRepository->fetchSubtreeNodeList( $topicIds ); |
| 132 | |
| 133 | // Merge all the children from the various posts into one array |
| 134 | if ( !$nodeList ) { |
| 135 | // It should have returned at least $topicIds |
| 136 | wfDebugLog( 'Flow', __METHOD__ . |
| 137 | ': No result received from TreeRepository::fetchSubtreeNodeList' ); |
| 138 | $postIds = $topicIds; |
| 139 | } elseif ( count( $nodeList ) === 1 ) { |
| 140 | $postIds = reset( $nodeList ); |
| 141 | } else { |
| 142 | $postIds = array_merge( ...array_values( $nodeList ) ); |
| 143 | } |
| 144 | |
| 145 | // re-index by alphadecimal id |
| 146 | return array_combine( |
| 147 | array_map( |
| 148 | static function ( UUID $x ) { |
| 149 | return $x->getAlphadecimal(); |
| 150 | }, |
| 151 | $postIds |
| 152 | ), |
| 153 | $postIds |
| 154 | ); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * @param UUID[] $topicIds |
| 159 | * @return array |
| 160 | */ |
| 161 | protected function collectWatchStatus( $topicIds ) { |
| 162 | $ids = []; |
| 163 | foreach ( $topicIds as $topicId ) { |
| 164 | $ids[] = $topicId->getAlphadecimal(); |
| 165 | } |
| 166 | return $this->watchedTopicItems->getWatchStatus( $ids ); |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * @param UUID[] $topicIds |
| 171 | * @return PostSummary[] |
| 172 | */ |
| 173 | protected function collectSummary( $topicIds ) { |
| 174 | if ( !$topicIds ) { |
| 175 | return []; |
| 176 | } |
| 177 | $conds = []; |
| 178 | foreach ( $topicIds as $topicId ) { |
| 179 | $conds[] = [ 'rev_type_id' => $topicId ]; |
| 180 | } |
| 181 | $found = $this->storage->findMulti( 'PostSummary', $conds, [ |
| 182 | 'sort' => 'rev_id', |
| 183 | 'order' => 'DESC', |
| 184 | 'limit' => 1, |
| 185 | ] ); |
| 186 | $result = []; |
| 187 | foreach ( $found as $row ) { |
| 188 | $summary = reset( $row ); |
| 189 | $result[$summary->getSummaryTargetId()->getAlphadecimal()] = $summary; |
| 190 | } |
| 191 | return $result; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * @param UUID[] $postIds |
| 196 | * @return PostRevision[] Indexed by alphadecimal post id |
| 197 | */ |
| 198 | protected function collectRevisions( array $postIds ) { |
| 199 | $queries = []; |
| 200 | foreach ( $postIds as $postId ) { |
| 201 | $queries[] = [ 'rev_type_id' => $postId ]; |
| 202 | } |
| 203 | $found = $this->storage->findMulti( 'PostRevision', $queries, [ |
| 204 | 'sort' => 'rev_id', |
| 205 | 'order' => 'DESC', |
| 206 | 'limit' => 1, |
| 207 | ] ); |
| 208 | |
| 209 | // index results by post id for later filtering |
| 210 | $result = []; |
| 211 | foreach ( $found as $row ) { |
| 212 | $revision = reset( $row ); |
| 213 | $result[$revision->getPostId()->getAlphadecimal()] = $revision; |
| 214 | } |
| 215 | |
| 216 | return $result; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Override parent, we only load the most recent version, so just |
| 221 | * return self. |
| 222 | * @param AbstractRevision $revision |
| 223 | * @return AbstractRevision |
| 224 | */ |
| 225 | protected function getCurrentRevision( AbstractRevision $revision ) { |
| 226 | return $revision; |
| 227 | } |
| 228 | } |