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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Rest\Handler; |
| 4 | |
| 5 | use File; |
| 6 | use MediaFileTrait; |
| 7 | use MediaWiki\Page\ExistingPageRecord; |
| 8 | use MediaWiki\Page\PageLookup; |
| 9 | use MediaWiki\Rest\LocalizedHttpException; |
| 10 | use MediaWiki\Rest\Response; |
| 11 | use MediaWiki\Rest\SimpleHandler; |
| 12 | use RepoGroup; |
| 13 | use Wikimedia\Message\MessageValue; |
| 14 | use Wikimedia\ParamValidator\ParamValidator; |
| 15 | |
| 16 | /** |
| 17 | * Handler class for media meta-data |
| 18 | */ |
| 19 | class MediaFileHandler extends SimpleHandler { |
| 20 | use MediaFileTrait; |
| 21 | |
| 22 | /** @var RepoGroup */ |
| 23 | private $repoGroup; |
| 24 | |
| 25 | /** @var PageLookup */ |
| 26 | private $pageLookup; |
| 27 | |
| 28 | /** |
| 29 | * @var ExistingPageRecord|false|null |
| 30 | */ |
| 31 | private $page = false; |
| 32 | |
| 33 | /** |
| 34 | * @var File|false|null |
| 35 | */ |
| 36 | private $file = false; |
| 37 | |
| 38 | /** |
| 39 | * @param RepoGroup $repoGroup |
| 40 | * @param PageLookup $pageLookup |
| 41 | */ |
| 42 | public function __construct( |
| 43 | RepoGroup $repoGroup, |
| 44 | PageLookup $pageLookup |
| 45 | ) { |
| 46 | $this->repoGroup = $repoGroup; |
| 47 | $this->pageLookup = $pageLookup; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * @return ExistingPageRecord|null |
| 52 | */ |
| 53 | private function getPage(): ?ExistingPageRecord { |
| 54 | if ( $this->page === false ) { |
| 55 | $this->page = $this->pageLookup->getExistingPageByText( |
| 56 | $this->getValidatedParams()['title'], NS_FILE |
| 57 | ); |
| 58 | } |
| 59 | return $this->page; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * @return File|null |
| 64 | */ |
| 65 | private function getFile(): ?File { |
| 66 | if ( $this->file === false ) { |
| 67 | $page = $this->getPage(); |
| 68 | $this->file = |
| 69 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable |
| 70 | $this->repoGroup->findFile( $page, [ 'private' => $this->getAuthority() ] ) ?: null; |
| 71 | } |
| 72 | return $this->file; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * @param string $title |
| 77 | * @return Response |
| 78 | * @throws LocalizedHttpException |
| 79 | */ |
| 80 | public function run( $title ) { |
| 81 | $page = $this->getPage(); |
| 82 | |
| 83 | if ( !$page ) { |
| 84 | throw new LocalizedHttpException( |
| 85 | MessageValue::new( 'rest-nonexistent-title' )->plaintextParams( $title ), |
| 86 | 404 |
| 87 | ); |
| 88 | } |
| 89 | |
| 90 | if ( !$this->getAuthority()->authorizeRead( 'read', $page ) ) { |
| 91 | throw new LocalizedHttpException( |
| 92 | MessageValue::new( 'rest-permission-denied-title' )->plaintextParams( $title ), |
| 93 | 403 |
| 94 | ); |
| 95 | } |
| 96 | |
| 97 | $fileObj = $this->getFile(); |
| 98 | if ( !$fileObj || !$fileObj->exists() ) { |
| 99 | throw new LocalizedHttpException( |
| 100 | MessageValue::new( 'rest-cannot-load-file' )->plaintextParams( $title ), |
| 101 | 404 |
| 102 | ); |
| 103 | } |
| 104 | |
| 105 | $response = $this->getResponse( $fileObj ); |
| 106 | return $this->getResponseFactory()->createJson( $response ); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * @param File $file the file to load media links for |
| 111 | * @return array response data |
| 112 | */ |
| 113 | private function getResponse( File $file ): array { |
| 114 | [ $maxWidth, $maxHeight ] = self::getImageLimitsFromOption( |
| 115 | $this->getAuthority()->getUser(), 'imagesize' |
| 116 | ); |
| 117 | [ $maxThumbWidth, $maxThumbHeight ] = self::getImageLimitsFromOption( |
| 118 | $this->getAuthority()->getUser(), 'thumbsize' |
| 119 | ); |
| 120 | $transforms = [ |
| 121 | 'preferred' => [ |
| 122 | 'maxWidth' => $maxWidth, |
| 123 | 'maxHeight' => $maxHeight |
| 124 | ], |
| 125 | 'thumbnail' => [ |
| 126 | 'maxWidth' => $maxThumbWidth, |
| 127 | 'maxHeight' => $maxThumbHeight |
| 128 | ] |
| 129 | ]; |
| 130 | |
| 131 | return $this->getFileInfo( $file, $this->getAuthority(), $transforms ); |
| 132 | } |
| 133 | |
| 134 | public function needsWriteAccess() { |
| 135 | return false; |
| 136 | } |
| 137 | |
| 138 | public function getParamSettings() { |
| 139 | return [ |
| 140 | 'title' => [ |
| 141 | self::PARAM_SOURCE => 'path', |
| 142 | ParamValidator::PARAM_TYPE => 'string', |
| 143 | ParamValidator::PARAM_REQUIRED => true, |
| 144 | ], |
| 145 | ]; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * @return string|null |
| 150 | * @throws LocalizedHttpException |
| 151 | */ |
| 152 | protected function getETag(): ?string { |
| 153 | $file = $this->getFile(); |
| 154 | if ( !$file || !$file->exists() ) { |
| 155 | return null; |
| 156 | } |
| 157 | |
| 158 | return '"' . $file->getSha1() . '"'; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * @return string|null |
| 163 | * @throws LocalizedHttpException |
| 164 | */ |
| 165 | protected function getLastModified(): ?string { |
| 166 | $file = $this->getFile(); |
| 167 | if ( !$file || !$file->exists() ) { |
| 168 | return null; |
| 169 | } |
| 170 | |
| 171 | return $file->getTimestamp(); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * @return bool |
| 176 | */ |
| 177 | protected function hasRepresentation() { |
| 178 | $file = $this->getFile(); |
| 179 | return $file && $file->exists(); |
| 180 | } |
| 181 | } |