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| 1 | <?php |
| 2 | |
| 3 | namespace Wikibase\MediaInfo\Content; |
| 4 | |
| 5 | use MediaWiki\Context\IContextSource; |
| 6 | use MediaWiki\Linker\LinkTarget; |
| 7 | use MediaWiki\Parser\ParserOptions; |
| 8 | use MediaWiki\Title\Title; |
| 9 | use Wikibase\Lib\Store\EntityRevision; |
| 10 | use Wikibase\MediaInfo\DataModel\MediaInfo; |
| 11 | use Wikibase\MediaInfo\DataModel\MediaInfoId; |
| 12 | use Wikibase\MediaInfo\Services\FilePageLookup; |
| 13 | use Wikibase\MediaInfo\Services\MediaInfoIdLookup; |
| 14 | use Wikibase\Repo\ParserOutput\EntityParserOutputGeneratorFactory; |
| 15 | |
| 16 | /** |
| 17 | * Handler for missing MediaInfo entities. |
| 18 | * |
| 19 | * @license GPL-2.0-or-later |
| 20 | * @author Daniel Kinzler |
| 21 | */ |
| 22 | class MissingMediaInfoHandler { |
| 23 | |
| 24 | /** |
| 25 | * @var MediaInfoIdLookup |
| 26 | */ |
| 27 | private $idLookup; |
| 28 | |
| 29 | /** |
| 30 | * @var FilePageLookup |
| 31 | */ |
| 32 | private $filePageLookup; |
| 33 | |
| 34 | /** |
| 35 | * @var EntityParserOutputGeneratorFactory |
| 36 | */ |
| 37 | private $outputGeneratorFactory; |
| 38 | |
| 39 | /** |
| 40 | * @param MediaInfoIdLookup $idLookup |
| 41 | * @param FilePageLookup $filePageLookup |
| 42 | * @param EntityParserOutputGeneratorFactory $outputGeneratorFactory |
| 43 | */ |
| 44 | public function __construct( |
| 45 | MediaInfoIdLookup $idLookup, |
| 46 | FilePageLookup $filePageLookup, |
| 47 | EntityParserOutputGeneratorFactory $outputGeneratorFactory |
| 48 | ) { |
| 49 | $this->idLookup = $idLookup; |
| 50 | $this->filePageLookup = $filePageLookup; |
| 51 | $this->outputGeneratorFactory = $outputGeneratorFactory; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Returns the MediaInfoId that corresponds to the given $title, if the title is |
| 56 | * valid for a MediaInfo entity, and a corresponding File page exists. If the title |
| 57 | * does not correspond to a valid MediaInfoId or no corresponding File page exists, |
| 58 | * this methods returns null. In other words, if this methods returns a MediaInfoId, |
| 59 | * that ID can be used to show a "virtual" MediaInfo entity. |
| 60 | * |
| 61 | * @see EntityHandler::showMissingEntity |
| 62 | * |
| 63 | * @param LinkTarget $title The title of the page that potentially could, but does not, |
| 64 | * contain an entity. |
| 65 | * @param IContextSource $context Context to use for reporting. In particular, output |
| 66 | * will be written to $context->getOutput(). |
| 67 | * |
| 68 | * @return MediaInfoId|null |
| 69 | */ |
| 70 | public function getMediaInfoId( LinkTarget $title, IContextSource $context ) { |
| 71 | $mediaInfoId = $this->idLookup->getEntityIdForTitle( Title::newFromLinkTarget( $title ) ); |
| 72 | if ( $mediaInfoId === null || !( $mediaInfoId instanceof MediaInfoId ) ) { |
| 73 | return null; |
| 74 | } |
| 75 | |
| 76 | $filePageTitle = $this->filePageLookup->getFilePage( $mediaInfoId ); |
| 77 | if ( $filePageTitle === null || !$filePageTitle->exists() ) { |
| 78 | return null; |
| 79 | } |
| 80 | |
| 81 | return $mediaInfoId; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Display a "virtual" (empty) MediaInfo entity with the given ID. |
| 86 | * |
| 87 | * @see EntityHandler::showMissingEntity |
| 88 | * |
| 89 | * @param MediaInfoId $mediaInfoId The ID of the virtual MediaInfo entity to show. |
| 90 | * @param IContextSource $context Context to use for display. In particular, output |
| 91 | * will be written to $context->getOutput(), and the output language is determined |
| 92 | * by $context->getLanguage(). |
| 93 | */ |
| 94 | public function showVirtualMediaInfo( MediaInfoId $mediaInfoId, IContextSource $context ) { |
| 95 | $outputPage = $context->getOutput(); |
| 96 | |
| 97 | $parserOptions = ParserOptions::newFromContext( $context ); |
| 98 | // show an empty MediaInfo |
| 99 | $outputGenerator = $this->outputGeneratorFactory-> |
| 100 | getEntityParserOutputGeneratorForParserOptions( $parserOptions ); |
| 101 | |
| 102 | $mediaInfo = new MediaInfo( $mediaInfoId ); |
| 103 | |
| 104 | $parserOutput = $outputGenerator->getParserOutput( new EntityRevision( $mediaInfo ), true ); |
| 105 | |
| 106 | $outputPage->addParserOutput( |
| 107 | $parserOutput, |
| 108 | $parserOptions, |
| 109 | ); |
| 110 | } |
| 111 | |
| 112 | } |