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| 1 | <?php |
| 2 | /** |
| 3 | * DiscussionTools parser hooks |
| 4 | * |
| 5 | * @file |
| 6 | * @ingroup Extensions |
| 7 | * @license MIT |
| 8 | */ |
| 9 | |
| 10 | namespace MediaWiki\Extension\DiscussionTools\Hooks; |
| 11 | |
| 12 | use MediaWiki\Config\Config; |
| 13 | use MediaWiki\Config\ConfigFactory; |
| 14 | use MediaWiki\Extension\DiscussionTools\CommentFormatter; |
| 15 | use MediaWiki\Hook\GetDoubleUnderscoreIDsHook; |
| 16 | use MediaWiki\Hook\ParserAfterTidyHook; |
| 17 | use MediaWiki\Hook\ParserOutputPostCacheTransformHook; |
| 18 | use MediaWiki\Parser\ParserOutputFlags; |
| 19 | use MediaWiki\Parser\Parsoid\PageBundleParserOutputConverter; |
| 20 | use MediaWiki\Parser\Parsoid\ParsoidParser; |
| 21 | use MediaWiki\Title\Title; |
| 22 | use Parser; |
| 23 | use ParserOutput; |
| 24 | |
| 25 | class ParserHooks implements |
| 26 | ParserOutputPostCacheTransformHook, |
| 27 | GetDoubleUnderscoreIDsHook, |
| 28 | ParserAfterTidyHook |
| 29 | { |
| 30 | |
| 31 | private Config $config; |
| 32 | |
| 33 | public function __construct( |
| 34 | ConfigFactory $configFactory |
| 35 | ) { |
| 36 | $this->config = $configFactory->makeConfig( 'discussiontools' ); |
| 37 | } |
| 38 | |
| 39 | private function transformHtml( |
| 40 | ParserOutput $pout, string &$html, Title $title, bool $isPreview |
| 41 | ): void { |
| 42 | // This condition must be unreliant on current enablement config or user preference. |
| 43 | // In other words, include parser output of talk pages with DT disabled. |
| 44 | // |
| 45 | // This is similar to HookUtils::isAvailableForTitle, but instead of querying the |
| 46 | // database for the latest metadata of a page that exists, we check metadata of |
| 47 | // the given ParserOutput object only (this runs before the edit is saved). |
| 48 | if ( $title->isTalkPage() || $pout->getNewSection() ) { |
| 49 | $talkExpiry = $this->config->get( 'DiscussionToolsTalkPageParserCacheExpiry' ); |
| 50 | // Override parser cache expiry of talk pages (T280605). |
| 51 | // Note, this can only shorten it. MediaWiki ignores values higher than the default. |
| 52 | // NOTE: this currently has no effect for Parsoid read |
| 53 | // views, since parsoid executes this method as a |
| 54 | // post-cache transform. *However* future work may allow |
| 55 | // caching of intermediate results of the "post cache" |
| 56 | // transformation pipeline, in which case this code will |
| 57 | // again be effective. (More: T350626) |
| 58 | if ( $talkExpiry > 0 ) { |
| 59 | $pout->updateCacheExpiry( $talkExpiry ); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | // Always apply the DOM transform if DiscussionTools are available for this page, |
| 64 | // to allow linking to individual comments from Echo 'mention' and 'edit-user-talk' |
| 65 | // notifications (T253082, T281590), and to reduce parser cache fragmentation (T279864). |
| 66 | // The extra buttons are hidden in CSS (ext.discussionTools.init.styles module) when |
| 67 | // the user doesn't have DiscussionTools features enabled. |
| 68 | if ( HookUtils::isAvailableForTitle( $title ) ) { |
| 69 | // This modifies $html |
| 70 | CommentFormatter::addDiscussionTools( $html, $pout, $title ); |
| 71 | |
| 72 | if ( $isPreview ) { |
| 73 | $html = CommentFormatter::removeInteractiveTools( $html ); |
| 74 | // Suppress the empty state |
| 75 | $pout->setExtensionData( 'DiscussionTools-isEmptyTalkPage', null ); |
| 76 | } |
| 77 | |
| 78 | $pout->addModuleStyles( [ 'ext.discussionTools.init.styles' ] ); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * For now, this hook only runs on Parsoid HTML. Eventually, this is likely |
| 84 | * to be run for legacy HTML but that requires ParserCache storage to be allocated |
| 85 | * for DiscussionTools HTML which will be purused separately. |
| 86 | * |
| 87 | * @inheritDoc |
| 88 | */ |
| 89 | public function onParserOutputPostCacheTransform( $parserOutput, &$text, &$options ): void { |
| 90 | $isPreview = $parserOutput->getOutputFlag( ParserOutputFlags::IS_PREVIEW ); |
| 91 | |
| 92 | // We want to run this hook only on Parsoid HTML for now. |
| 93 | // (and leave the onParserAfterTidy handler for legacy HTML). |
| 94 | if ( PageBundleParserOutputConverter::hasPageBundle( $parserOutput ) ) { |
| 95 | $titleDbKey = $parserOutput->getExtensionData( ParsoidParser::PARSOID_TITLE_KEY ); |
| 96 | $title = Title::newFromDBkey( $titleDbKey ); |
| 97 | '@phan-var Title $title'; |
| 98 | $this->transformHtml( $parserOutput, $text, $title, $isPreview ); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * @see https://www.mediawiki.org/wiki/Manual:Hooks/ParserAfterTidy |
| 104 | * |
| 105 | * @param Parser $parser |
| 106 | * @param string &$text |
| 107 | */ |
| 108 | public function onParserAfterTidy( $parser, &$text ) { |
| 109 | $pOpts = $parser->getOptions(); |
| 110 | if ( $pOpts->getInterfaceMessage() ) { |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | $this->transformHtml( |
| 115 | $parser->getOutput(), $text, $parser->getTitle(), $pOpts->getIsPreview() |
| 116 | ); |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * @see https://www.mediawiki.org/wiki/Manual:Hooks/GetDoubleUnderscoreIDs |
| 121 | * |
| 122 | * @param string[] &$doubleUnderscoreIDs |
| 123 | * @return bool|void |
| 124 | */ |
| 125 | public function onGetDoubleUnderscoreIDs( &$doubleUnderscoreIDs ) { |
| 126 | $doubleUnderscoreIDs[] = 'archivedtalk'; |
| 127 | $doubleUnderscoreIDs[] = 'notalk'; |
| 128 | } |
| 129 | } |