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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\FeaturedFeeds; |
| 4 | |
| 5 | use MediaWiki\SpecialPage\UnlistedSpecialPage; |
| 6 | use MediaWiki\Utils\MWTimestamp; |
| 7 | use Wikimedia\ObjectCache\WANObjectCache; |
| 8 | |
| 9 | class SpecialFeedItem extends UnlistedSpecialPage { |
| 10 | |
| 11 | /** @var WANObjectCache */ |
| 12 | private $wanObjectCache; |
| 13 | |
| 14 | /** |
| 15 | * @param WANObjectCache $wanObjectCache |
| 16 | */ |
| 17 | public function __construct( |
| 18 | WANObjectCache $wanObjectCache |
| 19 | ) { |
| 20 | parent::__construct( 'FeedItem' ); |
| 21 | $this->wanObjectCache = $wanObjectCache; |
| 22 | } |
| 23 | |
| 24 | /** @inheritDoc */ |
| 25 | public function execute( $par = '' ) { |
| 26 | $this->setHeaders(); |
| 27 | $out = $this->getOutput(); |
| 28 | $parts = explode( '/', $par ); |
| 29 | if ( count( $parts ) != 3 ) { |
| 30 | $out->showErrorPage( 'error', 'ffeed-no-feed' ); |
| 31 | return; |
| 32 | } |
| 33 | [ $feedName, $date, $langCode ] = $parts; |
| 34 | $feeds = FeaturedFeeds::getFeeds( $langCode ); |
| 35 | if ( !isset( $feeds[$feedName] ) ) { |
| 36 | $out->showErrorPage( 'error', 'ffeed-feed-not-found', [ $feedName ] ); |
| 37 | return; |
| 38 | } |
| 39 | $feed = $feeds[$feedName]; |
| 40 | $timestamp = $this->parseTimestamp( $date ); |
| 41 | if ( !$timestamp ) { |
| 42 | $out->showErrorPage( 'error', 'ffeed-invalid-timestamp' ); |
| 43 | return; |
| 44 | } |
| 45 | $date = FeaturedFeeds::startOfDay( $timestamp ); |
| 46 | // First, search in the general cache |
| 47 | foreach ( $feed->getFeedItems() as $item ) { |
| 48 | if ( $item->getRawDate() == $date ) { |
| 49 | $this->displayItem( $item ); |
| 50 | return; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | $cache = $this->wanObjectCache; |
| 55 | |
| 56 | $item = $cache->getWithSetCallback( |
| 57 | $cache->makeKey( |
| 58 | 'featured-feed', |
| 59 | $feedName, |
| 60 | $date, |
| 61 | $feed->getLanguage()->getCode() |
| 62 | ), |
| 63 | $cache::TTL_DAY, |
| 64 | static function () use ( $feed, $date ) { |
| 65 | $item = $feed->getFeedItem( $date ); |
| 66 | |
| 67 | if ( $item ) { |
| 68 | return $item->toArray(); |
| 69 | } |
| 70 | |
| 71 | return false; |
| 72 | }, |
| 73 | [ 'version' => FeaturedFeedChannel::VERSION ] |
| 74 | ); |
| 75 | |
| 76 | if ( $item ) { |
| 77 | $this->displayItem( FeaturedFeedItem::fromArray( $item ) ); |
| 78 | } else { |
| 79 | $out->showErrorPage( 'error', 'ffeed-entry-not-found', |
| 80 | [ $this->getLanguage()->date( wfTimestamp( TS_UNIX, $date ), false, false ) ] |
| 81 | ); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * @param string $date |
| 87 | * @return string|false |
| 88 | */ |
| 89 | private function parseTimestamp( $date ) { |
| 90 | if ( strlen( $date ) !== 14 ) { |
| 91 | return false; |
| 92 | } |
| 93 | return MWTimestamp::convert( TS_UNIX, $date ); |
| 94 | } |
| 95 | |
| 96 | private function displayItem( FeaturedFeedItem $item ) { |
| 97 | $out = $this->getOutput(); |
| 98 | $out->setPageTitle( $item->getRawTitle() ); |
| 99 | $out->addHTML( $item->getRawText() ); |
| 100 | } |
| 101 | } |