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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Formatter; |
| 4 | |
| 5 | use Flow\Model\UUID; |
| 6 | use Flow\UrlGenerator; |
| 7 | use MediaWiki\Content\TextContent; |
| 8 | use MediaWiki\Context\IContextSource; |
| 9 | |
| 10 | class RevisionDiffViewFormatter { |
| 11 | |
| 12 | /** |
| 13 | * @var RevisionViewFormatter |
| 14 | */ |
| 15 | protected $revisionViewFormatter; |
| 16 | |
| 17 | /** |
| 18 | * @var UrlGenerator |
| 19 | */ |
| 20 | protected $urlGenerator; |
| 21 | |
| 22 | public function __construct( |
| 23 | RevisionViewFormatter $revisionViewFormatter, |
| 24 | UrlGenerator $urlGenerator |
| 25 | ) { |
| 26 | $this->revisionViewFormatter = $revisionViewFormatter; |
| 27 | $this->urlGenerator = $urlGenerator; |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * Diff would format against two revisions |
| 32 | * @param FormatterRow $newRow |
| 33 | * @param FormatterRow $oldRow |
| 34 | * @param IContextSource $ctx |
| 35 | * @return array |
| 36 | */ |
| 37 | public function formatApi( FormatterRow $newRow, FormatterRow $oldRow, IContextSource $ctx ) { |
| 38 | $oldRes = $this->revisionViewFormatter->formatApi( $oldRow, $ctx ); |
| 39 | $newRes = $this->revisionViewFormatter->formatApi( $newRow, $ctx ); |
| 40 | |
| 41 | $oldContent = $oldRow->revision->getContentInWikitext(); |
| 42 | $newContent = $newRow->revision->getContentInWikitext(); |
| 43 | |
| 44 | $differenceEngine = new \DifferenceEngine(); |
| 45 | |
| 46 | $differenceEngine->setContent( |
| 47 | new TextContent( $oldContent ), |
| 48 | new TextContent( $newContent ) |
| 49 | ); |
| 50 | |
| 51 | if ( $oldRow->revision->isFirstRevision() ) { |
| 52 | $prevLink = null; |
| 53 | } else { |
| 54 | $prevLink = $this->urlGenerator->diffLink( |
| 55 | $oldRow->revision, |
| 56 | $ctx->getTitle(), |
| 57 | UUID::create( $oldRes['workflowId'] ) |
| 58 | )->getLocalURL(); |
| 59 | } |
| 60 | |
| 61 | // this is probably a network request which typically goes in the query |
| 62 | // half, but we don't have to worry about batching because we only show |
| 63 | // one diff at a time so just do it. |
| 64 | $nextRevision = $newRow->revision->getCollection()->getNextRevision( $newRow->revision ); |
| 65 | if ( $nextRevision === null ) { |
| 66 | $nextLink = null; |
| 67 | } else { |
| 68 | $nextLink = $this->urlGenerator->diffLink( |
| 69 | $nextRevision, |
| 70 | $ctx->getTitle(), |
| 71 | UUID::create( $newRes['workflowId'] ) |
| 72 | )->getLocalURL(); |
| 73 | } |
| 74 | |
| 75 | return [ |
| 76 | 'new' => $newRes, |
| 77 | 'old' => $oldRes, |
| 78 | 'diff_content' => $differenceEngine->getDiffBody(), |
| 79 | 'links' => [ |
| 80 | 'previous' => $prevLink, |
| 81 | 'next' => $nextLink, |
| 82 | ], |
| 83 | ]; |
| 84 | } |
| 85 | } |