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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Formatter; |
| 4 | |
| 5 | use Flow\Model\UUID; |
| 6 | use Flow\Model\Workflow; |
| 7 | use Flow\UrlGenerator; |
| 8 | use IContextSource; |
| 9 | |
| 10 | class TopicFormatter { |
| 11 | /** |
| 12 | * @var UrlGenerator |
| 13 | */ |
| 14 | protected $urlGenerator; |
| 15 | |
| 16 | /** |
| 17 | * @var RevisionFormatter |
| 18 | */ |
| 19 | protected $serializer; |
| 20 | |
| 21 | public function __construct( UrlGenerator $urlGenerator, RevisionFormatter $serializer ) { |
| 22 | $this->urlGenerator = $urlGenerator; |
| 23 | $this->serializer = $serializer; |
| 24 | } |
| 25 | |
| 26 | public function setContentFormat( $contentFormat, UUID $revisionId = null ) { |
| 27 | $this->serializer->setContentFormat( $contentFormat, $revisionId ); |
| 28 | } |
| 29 | |
| 30 | public function getEmptyResult( Workflow $workflow ) { |
| 31 | return [ |
| 32 | 'workflowId' => $workflow->getId()->getAlphadecimal(), |
| 33 | 'type' => 'topic', |
| 34 | 'roots' => [], |
| 35 | 'posts' => [], |
| 36 | 'revisions' => [], |
| 37 | 'links' => [], |
| 38 | 'actions' => $this->buildApiActions( $workflow ), |
| 39 | ]; |
| 40 | } |
| 41 | |
| 42 | public function formatApi( Workflow $listWorkflow, array $found, IContextSource $ctx ) { |
| 43 | $roots = $revisions = $posts = $replies = []; |
| 44 | foreach ( $found as $formatterRow ) { |
| 45 | $serialized = $this->serializer->formatApi( $formatterRow, $ctx ); |
| 46 | if ( !$serialized ) { |
| 47 | continue; |
| 48 | } |
| 49 | $revisions[$serialized['revisionId']] = $serialized; |
| 50 | $posts[$serialized['postId']][] = $serialized['revisionId']; |
| 51 | if ( $serialized['replyToId'] ) { |
| 52 | $replies[$serialized['replyToId']][] = $serialized['postId']; |
| 53 | } else { |
| 54 | $roots[] = $serialized['postId']; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | foreach ( $revisions as $i => $serialized ) { |
| 59 | $alpha = $serialized['postId']; |
| 60 | $revisions[$i]['replies'] = $replies[$alpha] ?? []; |
| 61 | } |
| 62 | |
| 63 | $alpha = $listWorkflow->getId()->getAlphadecimal(); |
| 64 | $workflows = [ $alpha => $listWorkflow ]; |
| 65 | if ( isset( $posts[$alpha] ) ) { |
| 66 | // Metadata that requires everything to be serialized first |
| 67 | $metadata = $this->generateTopicMetadata( $posts, $revisions, $workflows, $alpha ); |
| 68 | foreach ( $posts[$alpha] as $revId ) { |
| 69 | $revisions[$revId] += $metadata; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | return [ |
| 74 | 'roots' => $roots, |
| 75 | 'posts' => $posts, |
| 76 | 'revisions' => $revisions, |
| 77 | ] + $this->getEmptyResult( $listWorkflow ); |
| 78 | } |
| 79 | |
| 80 | protected function buildApiActions( Workflow $workflow ) { |
| 81 | return [ |
| 82 | 'newtopic' => [ |
| 83 | 'url' => $this->urlGenerator |
| 84 | ->newTopicAction( $workflow->getArticleTitle(), $workflow->getId() ) |
| 85 | ], |
| 86 | ]; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * @param array $posts Map from alphadecimal postId to list of alphadecimal revisionId's |
| 91 | * for that postId contained within $revisions. |
| 92 | * @param array $revisions Map from alphadecimal revisionId to serialized representation |
| 93 | * of that revision. |
| 94 | * @param Workflow[] $workflows Map from alphadecimal workflowId to Workflow instance |
| 95 | * @param string $postAlphaId PostId of the topic title |
| 96 | * @return array |
| 97 | */ |
| 98 | protected function generateTopicMetadata( array $posts, array $revisions, array $workflows, $postAlphaId ) { |
| 99 | $replies = -1; |
| 100 | $authors = []; |
| 101 | $stack = new \SplStack; |
| 102 | $stack->push( $revisions[$posts[$postAlphaId][0]] ); |
| 103 | do { |
| 104 | $data = $stack->pop(); |
| 105 | $replies++; |
| 106 | $authors[] = $data['creator']['name']; |
| 107 | foreach ( $data['replies'] as $postId ) { |
| 108 | $stack->push( $revisions[$posts[$postId][0]] ); |
| 109 | } |
| 110 | } while ( !$stack->isEmpty() ); |
| 111 | |
| 112 | $workflow = $workflows[$postAlphaId] ?? null; |
| 113 | |
| 114 | return [ |
| 115 | 'reply_count' => $replies, |
| 116 | // ms timestamp |
| 117 | 'last_updated' => $workflow ? (int)$workflow->getLastUpdatedObj()->getTimestamp() * 1000 : null, |
| 118 | ]; |
| 119 | } |
| 120 | } |