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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Rest\Handler; |
| 4 | |
| 5 | use MediaWiki\Languages\LanguageNameUtils; |
| 6 | use MediaWiki\Page\ExistingPageRecord; |
| 7 | use MediaWiki\Page\PageLookup; |
| 8 | use MediaWiki\Rest\Handler\Helper\PageRedirectHelper; |
| 9 | use MediaWiki\Rest\Handler\Helper\PageRestHelperFactory; |
| 10 | use MediaWiki\Rest\LocalizedHttpException; |
| 11 | use MediaWiki\Rest\Response; |
| 12 | use MediaWiki\Rest\SimpleHandler; |
| 13 | use MediaWiki\Title\MalformedTitleException; |
| 14 | use MediaWiki\Title\TitleFormatter; |
| 15 | use MediaWiki\Title\TitleParser; |
| 16 | use Wikimedia\Message\MessageValue; |
| 17 | use Wikimedia\Message\ParamType; |
| 18 | use Wikimedia\Message\ScalarParam; |
| 19 | use Wikimedia\ParamValidator\ParamValidator; |
| 20 | use Wikimedia\Rdbms\IConnectionProvider; |
| 21 | |
| 22 | /** |
| 23 | * Class LanguageLinksHandler |
| 24 | * REST API handler for /page/{title}/links/language endpoint. |
| 25 | * |
| 26 | * @package MediaWiki\Rest\Handler |
| 27 | */ |
| 28 | class LanguageLinksHandler extends SimpleHandler { |
| 29 | |
| 30 | private IConnectionProvider $dbProvider; |
| 31 | private LanguageNameUtils $languageNameUtils; |
| 32 | private TitleFormatter $titleFormatter; |
| 33 | private TitleParser $titleParser; |
| 34 | private PageLookup $pageLookup; |
| 35 | private PageRestHelperFactory $helperFactory; |
| 36 | |
| 37 | /** |
| 38 | * @var ExistingPageRecord|false|null |
| 39 | */ |
| 40 | private $page = false; |
| 41 | |
| 42 | /** |
| 43 | * @param IConnectionProvider $dbProvider |
| 44 | * @param LanguageNameUtils $languageNameUtils |
| 45 | * @param TitleFormatter $titleFormatter |
| 46 | * @param TitleParser $titleParser |
| 47 | * @param PageLookup $pageLookup |
| 48 | * @param PageRestHelperFactory $helperFactory |
| 49 | */ |
| 50 | public function __construct( |
| 51 | IConnectionProvider $dbProvider, |
| 52 | LanguageNameUtils $languageNameUtils, |
| 53 | TitleFormatter $titleFormatter, |
| 54 | TitleParser $titleParser, |
| 55 | PageLookup $pageLookup, |
| 56 | PageRestHelperFactory $helperFactory |
| 57 | ) { |
| 58 | $this->dbProvider = $dbProvider; |
| 59 | $this->languageNameUtils = $languageNameUtils; |
| 60 | $this->titleFormatter = $titleFormatter; |
| 61 | $this->titleParser = $titleParser; |
| 62 | $this->pageLookup = $pageLookup; |
| 63 | $this->helperFactory = $helperFactory; |
| 64 | } |
| 65 | |
| 66 | private function getRedirectHelper(): PageRedirectHelper { |
| 67 | return $this->helperFactory->newPageRedirectHelper( |
| 68 | $this->getResponseFactory(), |
| 69 | $this->getRouter(), |
| 70 | $this->getPath(), |
| 71 | $this->getRequest() |
| 72 | ); |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * @return ExistingPageRecord|null |
| 77 | */ |
| 78 | private function getPage(): ?ExistingPageRecord { |
| 79 | if ( $this->page === false ) { |
| 80 | $this->page = $this->pageLookup->getExistingPageByText( |
| 81 | $this->getValidatedParams()['title'] |
| 82 | ); |
| 83 | } |
| 84 | return $this->page; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * @param string $title |
| 89 | * @return Response |
| 90 | * @throws LocalizedHttpException |
| 91 | */ |
| 92 | public function run( $title ) { |
| 93 | $page = $this->getPage(); |
| 94 | $params = $this->getValidatedParams(); |
| 95 | |
| 96 | if ( !$page ) { |
| 97 | throw new LocalizedHttpException( |
| 98 | new MessageValue( 'rest-nonexistent-title', |
| 99 | [ new ScalarParam( ParamType::PLAINTEXT, $title ) ] |
| 100 | ), |
| 101 | 404 |
| 102 | ); |
| 103 | } |
| 104 | |
| 105 | '@phan-var \MediaWiki\Page\ExistingPageRecord $page'; |
| 106 | $redirectResponse = $this->getRedirectHelper()->createNormalizationRedirectResponseIfNeeded( |
| 107 | $page, |
| 108 | $params['title'] ?? null |
| 109 | ); |
| 110 | |
| 111 | if ( $redirectResponse !== null ) { |
| 112 | return $redirectResponse; |
| 113 | } |
| 114 | |
| 115 | if ( !$this->getAuthority()->authorizeRead( 'read', $page ) ) { |
| 116 | throw new LocalizedHttpException( |
| 117 | new MessageValue( 'rest-permission-denied-title', |
| 118 | [ new ScalarParam( ParamType::PLAINTEXT, $title ) ] ), |
| 119 | 403 |
| 120 | ); |
| 121 | } |
| 122 | |
| 123 | return $this->getResponseFactory() |
| 124 | ->createJson( $this->fetchLinks( $page->getId() ) ); |
| 125 | } |
| 126 | |
| 127 | private function fetchLinks( $pageId ) { |
| 128 | $result = []; |
| 129 | $res = $this->dbProvider->getReplicaDatabase()->newSelectQueryBuilder() |
| 130 | ->select( [ 'll_title', 'll_lang' ] ) |
| 131 | ->from( 'langlinks' ) |
| 132 | ->where( [ 'll_from' => $pageId ] ) |
| 133 | ->orderBy( 'll_lang' ) |
| 134 | ->caller( __METHOD__ )->fetchResultSet(); |
| 135 | foreach ( $res as $item ) { |
| 136 | try { |
| 137 | $targetTitle = $this->titleParser->parseTitle( $item->ll_title ); |
| 138 | $result[] = [ |
| 139 | 'code' => $item->ll_lang, |
| 140 | 'name' => $this->languageNameUtils->getLanguageName( $item->ll_lang ), |
| 141 | 'key' => $this->titleFormatter->getPrefixedDBkey( $targetTitle ), |
| 142 | 'title' => $this->titleFormatter->getPrefixedText( $targetTitle ) |
| 143 | ]; |
| 144 | } catch ( MalformedTitleException $e ) { |
| 145 | // skip malformed titles |
| 146 | } |
| 147 | } |
| 148 | return $result; |
| 149 | } |
| 150 | |
| 151 | public function needsWriteAccess() { |
| 152 | return false; |
| 153 | } |
| 154 | |
| 155 | public function getParamSettings() { |
| 156 | return [ |
| 157 | 'title' => [ |
| 158 | self::PARAM_SOURCE => 'path', |
| 159 | ParamValidator::PARAM_TYPE => 'string', |
| 160 | ParamValidator::PARAM_REQUIRED => true, |
| 161 | ], |
| 162 | ]; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * @return string|null |
| 167 | */ |
| 168 | protected function getETag(): ?string { |
| 169 | $page = $this->getPage(); |
| 170 | if ( !$page ) { |
| 171 | return null; |
| 172 | } |
| 173 | |
| 174 | // XXX: use hash of the rendered HTML? |
| 175 | return '"' . $page->getLatest() . '@' . wfTimestamp( TS_MW, $page->getTouched() ) . '"'; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * @return string|null |
| 180 | */ |
| 181 | protected function getLastModified(): ?string { |
| 182 | $page = $this->getPage(); |
| 183 | return $page ? $page->getTouched() : null; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * @return bool |
| 188 | */ |
| 189 | protected function hasRepresentation() { |
| 190 | return (bool)$this->getPage(); |
| 191 | } |
| 192 | |
| 193 | } |