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| 1 | <?php |
| 2 | /** |
| 3 | * Helper functions for using the REST interface to Parsoid. |
| 4 | * |
| 5 | * @copyright See AUTHORS.txt |
| 6 | * @license GPL-2.0-or-later |
| 7 | */ |
| 8 | |
| 9 | namespace ContentTranslation; |
| 10 | |
| 11 | use Exception; |
| 12 | use LocalizedException; |
| 13 | use MediaWiki\Language\RawMessage; |
| 14 | use MediaWiki\Page\PageIdentity; |
| 15 | use MediaWiki\Permissions\Authority; |
| 16 | use MediaWiki\Rest\Handler\Helper\HtmlInputTransformHelper; |
| 17 | use MediaWiki\Rest\Handler\Helper\HtmlOutputRendererHelper; |
| 18 | use MediaWiki\Rest\Handler\Helper\PageRestHelperFactory; |
| 19 | use MediaWiki\Rest\HttpException; |
| 20 | use MediaWiki\Rest\LocalizedHttpException; |
| 21 | use MediaWiki\Revision\MutableRevisionRecord; |
| 22 | use MediaWiki\Revision\RevisionRecord; |
| 23 | use MediaWiki\Revision\SlotRecord; |
| 24 | use User; |
| 25 | use WikitextContent; |
| 26 | |
| 27 | class DirectParsoidClient implements ParsoidClient { |
| 28 | |
| 29 | /** |
| 30 | * Requested Parsoid HTML version. |
| 31 | * Keep this in sync with the Accept: header in |
| 32 | * ve.init.mw.ArticleTargetLoader.js |
| 33 | */ |
| 34 | public const PARSOID_VERSION = '2.6.0'; |
| 35 | |
| 36 | /** @var PageRestHelperFactory */ |
| 37 | private $helperFactory; |
| 38 | |
| 39 | /** @var Authority */ |
| 40 | private $performer; |
| 41 | |
| 42 | /** |
| 43 | * @param PageRestHelperFactory $helperFactory |
| 44 | * @param Authority $performer |
| 45 | */ |
| 46 | public function __construct( |
| 47 | PageRestHelperFactory $helperFactory, |
| 48 | Authority $performer |
| 49 | ) { |
| 50 | $this->helperFactory = $helperFactory; |
| 51 | $this->performer = $performer; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * @param PageIdentity $page |
| 56 | * @param RevisionRecord|null $revision |
| 57 | * |
| 58 | * @return HtmlOutputRendererHelper |
| 59 | */ |
| 60 | private function getHtmlOutputRendererHelper( |
| 61 | PageIdentity $page, |
| 62 | RevisionRecord $revision = null |
| 63 | ): HtmlOutputRendererHelper { |
| 64 | $helper = $this->helperFactory->newHtmlOutputRendererHelper(); |
| 65 | |
| 66 | // TODO: remove this once we no longer need a User object for rate limiting (T310476). |
| 67 | if ( $this->performer instanceof User ) { |
| 68 | $user = $this->performer; |
| 69 | } else { |
| 70 | $user = User::newFromIdentity( $this->performer->getUser() ); |
| 71 | } |
| 72 | $helper->init( $page, [], $user, null ); |
| 73 | |
| 74 | if ( $revision ) { |
| 75 | $helper->setRevision( $revision ); |
| 76 | } |
| 77 | |
| 78 | return $helper; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * @param PageIdentity $page |
| 83 | * @param string $html |
| 84 | * |
| 85 | * @return HtmlInputTransformHelper |
| 86 | */ |
| 87 | private function getHtmlInputTransformHelper( |
| 88 | PageIdentity $page, |
| 89 | string $html |
| 90 | ): HtmlInputTransformHelper { |
| 91 | $helper = $this->helperFactory->newHtmlInputTransformHelper(); |
| 92 | |
| 93 | // Fake REST body |
| 94 | $body = [ |
| 95 | 'html' => [ |
| 96 | 'body' => $html, |
| 97 | ] |
| 98 | ]; |
| 99 | |
| 100 | $helper->init( $page, $body, [], null, null ); |
| 101 | |
| 102 | return $helper; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * @param PageIdentity $page |
| 107 | * @param string $wikitext |
| 108 | * |
| 109 | * @return RevisionRecord |
| 110 | */ |
| 111 | private function makeFakeRevision( |
| 112 | PageIdentity $page, |
| 113 | string $wikitext |
| 114 | ): RevisionRecord { |
| 115 | $rev = new MutableRevisionRecord( $page ); |
| 116 | $rev->setId( 0 ); |
| 117 | $rev->setPageId( $page->getId() ); |
| 118 | |
| 119 | $rev->setContent( SlotRecord::MAIN, new WikitextContent( $wikitext ) ); |
| 120 | |
| 121 | return $rev; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Transform wikitext to HTML with Parsoid. Wrapper for ::postData(). |
| 126 | * |
| 127 | * @param PageIdentity $page The page the content belongs to use as the parsing context |
| 128 | * @param string $wikitext The wikitext fragment to parse |
| 129 | * |
| 130 | * @return array An array mimicking a RESTbase server's response, |
| 131 | * with keys 'code', 'reason', 'headers' and 'body' |
| 132 | */ |
| 133 | public function convertWikitextToHtml( |
| 134 | PageIdentity $page, |
| 135 | string $wikitext |
| 136 | ): array { |
| 137 | $revision = $this->makeFakeRevision( $page, $wikitext ); |
| 138 | $helper = $this->getHtmlOutputRendererHelper( $page, $revision ); |
| 139 | |
| 140 | try { |
| 141 | $parserOutput = $helper->getHtml(); |
| 142 | $html = $parserOutput->getRawText(); |
| 143 | |
| 144 | return $this->fakeRESTbaseHTMLResponse( $html, $helper ); |
| 145 | } catch ( HttpException $ex ) { |
| 146 | return $this->fakeRESTbaseError( $ex ); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Transform HTML to wikitext with Parsoid |
| 152 | * |
| 153 | * @param PageIdentity $page The page the content belongs to |
| 154 | * @param string $html The HTML of the page to be transformed |
| 155 | * |
| 156 | * @return array The response, 'code', 'reason', 'headers' and 'body' |
| 157 | */ |
| 158 | public function convertHtmlToWikitext( |
| 159 | PageIdentity $page, string $html |
| 160 | ): array { |
| 161 | $helper = $this->getHtmlInputTransformHelper( $page, $html ); |
| 162 | |
| 163 | try { |
| 164 | $content = $helper->getContent(); |
| 165 | $format = $content->getDefaultFormat(); |
| 166 | |
| 167 | return [ |
| 168 | 'code' => 200, |
| 169 | 'headers' => [ |
| 170 | 'Content-Type' => $format, |
| 171 | ], |
| 172 | 'body' => $content->serialize( $format ), |
| 173 | ]; |
| 174 | } catch ( HttpException $ex ) { |
| 175 | return $this->fakeRESTbaseError( $ex ); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * @param mixed $data |
| 181 | * @param HtmlOutputRendererHelper $helper |
| 182 | * |
| 183 | * @return array |
| 184 | */ |
| 185 | private function fakeRESTbaseHTMLResponse( $data, HtmlOutputRendererHelper $helper ): array { |
| 186 | return [ |
| 187 | 'code' => 200, |
| 188 | 'headers' => [ |
| 189 | 'content-language' => $helper->getHtmlOutputContentLanguage(), |
| 190 | 'etag' => $helper->getETag() |
| 191 | ], |
| 192 | 'body' => $data, |
| 193 | ]; |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * @param Exception $ex |
| 198 | * |
| 199 | * @return array |
| 200 | */ |
| 201 | private function fakeRESTbaseError( Exception $ex ): array { |
| 202 | if ( $ex instanceof LocalizedHttpException ) { |
| 203 | $msg = $ex->getMessageValue(); |
| 204 | } elseif ( $ex instanceof LocalizedException ) { |
| 205 | $msg = $ex->getMessageObject(); |
| 206 | } else { |
| 207 | $msg = new RawMessage( $ex->getMessage() ); |
| 208 | } |
| 209 | |
| 210 | return [ |
| 211 | 'error' => [ |
| 212 | 'message' => $msg->getKey() ?? '', |
| 213 | 'params' => $msg->getParams() ?? [] |
| 214 | ], |
| 215 | 'headers' => [], |
| 216 | 'body' => $ex->getMessage(), |
| 217 | ]; |
| 218 | } |
| 219 | } |