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| 1 | <?php |
| 2 | /** |
| 3 | * WikiLambda extension handler for default (empty) values for our parser function |
| 4 | * |
| 5 | * @file |
| 6 | * @ingroup Extensions |
| 7 | * @copyright 2020– Abstract Wikipedia team; see AUTHORS.txt |
| 8 | * @license MIT |
| 9 | */ |
| 10 | |
| 11 | namespace MediaWiki\Extension\WikiLambda\ParserFunction; |
| 12 | |
| 13 | use DateTime; |
| 14 | use DateTimeZone; |
| 15 | use MediaWiki\Parser\ParserOutput; |
| 16 | use MediaWiki\Registration\ExtensionRegistry; |
| 17 | use MediaWiki\Title\Title; |
| 18 | use Wikimedia\Parsoid\Core\LinkTarget; |
| 19 | |
| 20 | class WikifunctionsCallDefaultValues { |
| 21 | |
| 22 | /** |
| 23 | * Returns the map of type IDs to default value callbacks. |
| 24 | * Each callback should return a default value for the given type. |
| 25 | * |
| 26 | * To add default values for other types: |
| 27 | * 1. Add a new entry in the returned array with the type zid |
| 28 | * as the index, and a callable as its value. |
| 29 | * 2. The callable can be an anonymous function or a public static |
| 30 | * named function, which should be implemented below. |
| 31 | * |
| 32 | * @return array |
| 33 | */ |
| 34 | private static function getDefaultValueCallbacks(): array { |
| 35 | return [ |
| 36 | 'Z60' => [ self::class, 'getDefaultLanguage' ], |
| 37 | 'Z6001' => [ self::class, 'getWikidataItem' ], |
| 38 | 'Z6091' => [ self::class, 'getWikidataItem' ], |
| 39 | 'Z20420' => [ self::class, 'getDefaultDate' ], |
| 40 | ]; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Checks whether a default value callback exists for a given type. |
| 45 | * |
| 46 | * @param string $type |
| 47 | * @return bool |
| 48 | */ |
| 49 | public static function hasDefaultValueCallback( string $type ): bool { |
| 50 | return array_key_exists( $type, self::getDefaultValueCallbacks() ); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Returns a callable that provides a default value for the given type. |
| 55 | * |
| 56 | * @param string $type |
| 57 | * @return callable|null |
| 58 | */ |
| 59 | public static function getDefaultValueForType( string $type ): ?callable { |
| 60 | return self::getDefaultValueCallbacks()[ $type ] ?? null; |
| 61 | } |
| 62 | |
| 63 | // Callables for each type: |
| 64 | |
| 65 | /** |
| 66 | * Default Value Callable for Language/Z60: |
| 67 | * Returns the language of the page |
| 68 | * |
| 69 | * @param array $context |
| 70 | * @return string |
| 71 | */ |
| 72 | public static function getDefaultLanguage( array $context = [] ): string { |
| 73 | // Context doesn't have the info of the page language; return empty string |
| 74 | if ( !isset( $context['pageLanguage'] ) || $context['pageLanguage'] === '' ) { |
| 75 | return ''; |
| 76 | } |
| 77 | // Return page language Bcp47 code, FunctionCallHandler will convert it to zid |
| 78 | return $context[ 'pageLanguage' ]; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Default Value Callable for Date/Z20420: |
| 83 | * Returns today's date in the current locale in the format 'dd-mm-yyyy' |
| 84 | * |
| 85 | * @param array $context |
| 86 | * @return string |
| 87 | */ |
| 88 | public static function getDefaultDate( array $context = [] ): string { |
| 89 | global $wgLocaltimezone; |
| 90 | |
| 91 | $cmc = $context['contentMetadataCollector'] ?? null; |
| 92 | // In some test cases, $cmc will be a StubMetadataCollector rather than a ParserOutput, so we can't do this |
| 93 | if ( $cmc && $cmc instanceof ParserOutput ) { |
| 94 | // Make sure our fragment's cache expiry is set to at most 24 hours, as we're adding |
| 95 | // a one-day-variant piece of content. |
| 96 | $cmc->updateRuntimeAdaptiveExpiry( 24 * 60 * 60 ); |
| 97 | } |
| 98 | |
| 99 | $date = new DateTime( 'now', new DateTimeZone( $wgLocaltimezone ?? 'UTC' ) ); |
| 100 | return $date->format( 'd-m-Y' ); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Default Value Callable for Wikidata Item/Z6001 and Wikidata Item Reference/Z6091 |
| 105 | * Returns the Wikidata Item ID linked to the client page |
| 106 | * |
| 107 | * @param array $context |
| 108 | * @return string |
| 109 | */ |
| 110 | public static function getWikidataItem( array $context = [] ): string { |
| 111 | // Context doesn't have info of the page title; return empty string |
| 112 | if ( !isset( $context['linkTarget'] ) || |
| 113 | !( $context['linkTarget'] instanceof LinkTarget ) ) { |
| 114 | return ''; |
| 115 | } |
| 116 | |
| 117 | // The extension doesn't have WikibaseClient loaded; return empty string |
| 118 | if ( !ExtensionRegistry::getInstance()->isLoaded( 'WikibaseClient' ) ) { |
| 119 | return ''; |
| 120 | } |
| 121 | |
| 122 | $prefixedTitle = Title::newFromLinkTarget( $context['linkTarget'] )->getPrefixedText(); |
| 123 | $wbSiteLinkLookup = \Wikibase\Client\WikibaseClient::getStore()->getSiteLinkLookup(); |
| 124 | $wbClientSettings = \Wikibase\Client\WikibaseClient::getSettings(); |
| 125 | |
| 126 | $clientSiteGlobalID = $wbClientSettings->getSetting( 'siteGlobalID' ); |
| 127 | $entityId = $wbSiteLinkLookup->getItemIdForLink( $clientSiteGlobalID, $prefixedTitle ); |
| 128 | |
| 129 | // No linked wikidata item; return empty string |
| 130 | if ( !$entityId ) { |
| 131 | return ''; |
| 132 | } |
| 133 | |
| 134 | // Success, return default value wikidata item ID; E.g. Q42 |
| 135 | return $entityId->getSerialization(); |
| 136 | } |
| 137 | } |