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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | namespace MediaWiki\MassMessage\MessageContentFetcher; |
| 5 | |
| 6 | use MediaWiki\Config\SiteConfiguration; |
| 7 | use MediaWiki\Http\HttpRequestFactory; |
| 8 | use MediaWiki\MassMessage\LanguageAwareText; |
| 9 | use MediaWiki\Status\Status; |
| 10 | |
| 11 | /** |
| 12 | * Fetches content from a remote wiki |
| 13 | * @author Abijeet Patro |
| 14 | * @since 2022.01 |
| 15 | * @license GPL-2.0-or-later |
| 16 | */ |
| 17 | class RemoteMessageContentFetcher { |
| 18 | /** @var HttpRequestFactory */ |
| 19 | private $httpRequestFactory; |
| 20 | /** @var SiteConfiguration */ |
| 21 | private $siteConfiguration; |
| 22 | |
| 23 | /** |
| 24 | * @param HttpRequestFactory $requestFactory |
| 25 | * @param SiteConfiguration $siteConfiguration |
| 26 | */ |
| 27 | public function __construct( HttpRequestFactory $requestFactory, SiteConfiguration $siteConfiguration ) { |
| 28 | $this->httpRequestFactory = $requestFactory; |
| 29 | $this->siteConfiguration = $siteConfiguration; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Fetch remote content and return Status object. The Status value contains a LanguageAwareText object |
| 34 | * @param string $pageTitle |
| 35 | * @param string $wikiId |
| 36 | * @return Status |
| 37 | */ |
| 38 | public function getContent( string $pageTitle, string $wikiId ): Status { |
| 39 | $apiUrl = $this->getApiEndpoint( $wikiId ); |
| 40 | if ( !$apiUrl ) { |
| 41 | return Status::newFatal( |
| 42 | 'massmessage-page-message-wiki-not-found', |
| 43 | $wikiId, |
| 44 | $pageTitle |
| 45 | ); |
| 46 | } |
| 47 | |
| 48 | $queryParams = [ |
| 49 | 'action' => 'query', |
| 50 | 'format' => 'json', |
| 51 | 'prop' => 'info|revisions', |
| 52 | 'rvprop' => 'content', |
| 53 | 'rvslots' => 'main', |
| 54 | 'titles' => $pageTitle, |
| 55 | 'formatversion' => 2, |
| 56 | ]; |
| 57 | |
| 58 | $options = [ |
| 59 | 'method' => 'GET', |
| 60 | 'timeout' => 15, |
| 61 | ]; |
| 62 | |
| 63 | $apiUrl .= '?' . http_build_query( $queryParams ); |
| 64 | $req = $this->httpRequestFactory->create( $apiUrl, $options, __METHOD__ ); |
| 65 | |
| 66 | $status = $req->execute(); |
| 67 | if ( !$status->isOK() ) { |
| 68 | // FIXME: Formatting is broken here, needs to be improved. |
| 69 | return Status::newFatal( |
| 70 | "massmessage-page-message-fetch-error-in-wiki", |
| 71 | $wikiId, |
| 72 | $pageTitle, |
| 73 | $status->getMessage()->text() |
| 74 | ); |
| 75 | } |
| 76 | |
| 77 | $json = $req->getContent(); |
| 78 | $response = json_decode( $json, true ); |
| 79 | if ( $response === null ) { |
| 80 | return Status::newFatal( |
| 81 | "massmessage-page-message-parsing-error-in-wiki", |
| 82 | $wikiId, |
| 83 | $pageTitle, |
| 84 | json_last_error_msg() |
| 85 | ); |
| 86 | } |
| 87 | |
| 88 | return $this->parseQueryApiResponse( $response, $wikiId, $pageTitle, $json ); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @param array $response |
| 93 | * @param string $wikiId |
| 94 | * @param string $pageTitle |
| 95 | * @param string $json |
| 96 | * @return Status |
| 97 | */ |
| 98 | private function parseQueryApiResponse( |
| 99 | array $response, |
| 100 | string $wikiId, |
| 101 | string $pageTitle, |
| 102 | string $json |
| 103 | ): Status { |
| 104 | // Example response: |
| 105 | // { |
| 106 | // "batchcomplete": true, |
| 107 | // "query": { |
| 108 | // "pages": [ { |
| 109 | // "pageid": 11285354, |
| 110 | // "ns": 0, |
| 111 | // "title": "Tech/News/2021/12", |
| 112 | // "contentmodel": "wikitext", |
| 113 | // "pagelanguage": "en", |
| 114 | // "pagelanguagehtmlcode": "en", |
| 115 | // "pagelanguagedir": "ltr", |
| 116 | // "touched": "2021-03-23T06:05:06Z", |
| 117 | // "lastrevid": 21247464, |
| 118 | // "length": 4585, |
| 119 | // "revisions": [ { |
| 120 | // "slots": { |
| 121 | // "main": { |
| 122 | // "contentmodel": "wikitext", |
| 123 | // "contentformat": "text/x-wiki", |
| 124 | // "content": "[...]" |
| 125 | // } |
| 126 | // } |
| 127 | // } ] |
| 128 | // } ] |
| 129 | // } |
| 130 | // } |
| 131 | |
| 132 | $pages = $response['query']['pages'] ?? []; |
| 133 | if ( isset( $response['error']['info'] ) || count( $pages ) !== 1 ) { |
| 134 | return Status::newFatal( |
| 135 | 'massmessage-page-message-parse-invalid-in-wiki', |
| 136 | $wikiId, |
| 137 | $pageTitle, |
| 138 | $response['error']['info'] ?? $json |
| 139 | ); |
| 140 | } |
| 141 | |
| 142 | // Take first and only one out of the list |
| 143 | $page = current( $pages ); |
| 144 | |
| 145 | if ( isset( $page['missing'] ) ) { |
| 146 | // Page was not found |
| 147 | return Status::newFatal( |
| 148 | 'massmessage-page-message-not-found-in-wiki', |
| 149 | $wikiId, |
| 150 | $pageTitle |
| 151 | ); |
| 152 | } |
| 153 | |
| 154 | $content = new LanguageAwareText( |
| 155 | $page['revisions'][0]['slots']['main']['content'], |
| 156 | $page['pagelanguage'], |
| 157 | $page['pagelanguagedir'] |
| 158 | ); |
| 159 | |
| 160 | return Status::newGood( $content ); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * @param string $wiki |
| 165 | * @return string|null |
| 166 | */ |
| 167 | private function getApiEndpoint( string $wiki ): ?string { |
| 168 | $this->siteConfiguration->loadFullData(); |
| 169 | |
| 170 | $siteFromDB = $this->siteConfiguration->siteFromDB( $wiki ); |
| 171 | [ $major, $minor ] = $siteFromDB; |
| 172 | |
| 173 | if ( $major === null ) { |
| 174 | return null; |
| 175 | } |
| 176 | |
| 177 | $configOpts = [ 'lang' => $minor, 'site' => $major ]; |
| 178 | $server = $this->siteConfiguration->get( |
| 179 | 'wgServer', |
| 180 | $wiki, |
| 181 | null, |
| 182 | $configOpts |
| 183 | ); |
| 184 | $scriptPath = $this->siteConfiguration->get( |
| 185 | 'wgScriptPath', |
| 186 | $wiki, |
| 187 | null, |
| 188 | $configOpts |
| 189 | ); |
| 190 | |
| 191 | $apiPath = wfExpandUrl( $server . $scriptPath . '/api.php', PROTO_INTERNAL ); |
| 192 | |
| 193 | return $apiPath; |
| 194 | } |
| 195 | } |