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| 1 | <?php |
| 2 | /** |
| 3 | * API module for retrieving JSON Schema. |
| 4 | * |
| 5 | * @file |
| 6 | * @ingroup EventLogging |
| 7 | * @ingroup Extensions |
| 8 | * |
| 9 | * @author Ori Livneh <ori@wikimedia.org> |
| 10 | */ |
| 11 | |
| 12 | namespace MediaWiki\Extension\EventLogging; |
| 13 | |
| 14 | use MediaWiki\Api\ApiBase; |
| 15 | use MediaWiki\Api\ApiResult; |
| 16 | use MediaWiki\MediaWikiServices; |
| 17 | use MediaWiki\Revision\RevisionRecord; |
| 18 | use MediaWiki\Revision\SlotRecord; |
| 19 | use MediaWiki\Title\Title; |
| 20 | use Wikimedia\ParamValidator\ParamValidator; |
| 21 | |
| 22 | /** |
| 23 | * API module for retrieving JSON Schema. |
| 24 | * This avoids API result paths and returns HTTP error codes in order to |
| 25 | * act like a request for the raw page content. |
| 26 | * @ingroup API |
| 27 | */ |
| 28 | class ApiJsonSchema extends ApiBase { |
| 29 | |
| 30 | /** @inheritDoc */ |
| 31 | public function getAllowedParams() { |
| 32 | return [ |
| 33 | 'revid' => [ |
| 34 | ParamValidator::PARAM_TYPE => 'integer', |
| 35 | ], |
| 36 | 'title' => [ |
| 37 | ParamValidator::PARAM_TYPE => 'string', |
| 38 | ], |
| 39 | ]; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * @see ApiBase::getExamplesMessages() |
| 44 | * @return array |
| 45 | */ |
| 46 | protected function getExamplesMessages() { |
| 47 | return [ |
| 48 | 'action=jsonschema&revid=1234' |
| 49 | => 'apihelp-jsonschema-example-1', |
| 50 | 'action=jsonschema&title=Test' |
| 51 | => 'apihelp-jsonschema-example-2', |
| 52 | ]; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Set headers on the pending HTTP response. |
| 57 | */ |
| 58 | private function markCacheable( RevisionRecord $revRecord ) { |
| 59 | $main = $this->getMain(); |
| 60 | $main->setCacheMode( 'public' ); |
| 61 | $main->setCacheMaxAge( 300 ); |
| 62 | |
| 63 | $lastModified = wfTimestamp( TS_RFC2822, $revRecord->getTimestamp() ); |
| 64 | $main->getRequest()->response()->header( "Last-Modified: $lastModified" ); |
| 65 | } |
| 66 | |
| 67 | public function execute() { |
| 68 | $params = $this->extractRequestParams(); |
| 69 | |
| 70 | if ( !isset( $params['revid'] ) && !isset( $params['title'] ) ) { |
| 71 | $this->dieWithError( |
| 72 | [ 'apierror-missingparam-at-least-one-of', 'revid', 'title' ], |
| 73 | null, null, 400 |
| 74 | ); |
| 75 | } |
| 76 | |
| 77 | $revLookup = MediaWikiServices::getInstance()->getRevisionLookup(); |
| 78 | // If we are given revid, then look up Revision and |
| 79 | // verify that $params['title'] (if given) matches. |
| 80 | if ( isset( $params['revid'] ) ) { |
| 81 | $revRecord = $revLookup->getRevisionById( $params['revid'] ); |
| 82 | if ( !$revRecord ) { |
| 83 | $this->dieWithError( |
| 84 | [ 'apierror-nosuchrevid', $params['revid'] ], null, null, 400 |
| 85 | ); |
| 86 | } |
| 87 | $title = Title::newFromPageIdentity( $revRecord->getPage() ); |
| 88 | if ( !$title->inNamespace( NS_SCHEMA ) ) { |
| 89 | $this->dieWithError( |
| 90 | [ 'apierror-invalidtitle', wfEscapeWikiText( $title->getPrefixedText() ) ], null, null, 400 |
| 91 | ); |
| 92 | } |
| 93 | |
| 94 | // If we use the revid param for lookup; the 'title' parameter is |
| 95 | // optional. If present, it is used to assert that the specified |
| 96 | // revision ID is indeed a revision of a page with the specified |
| 97 | // title. (Bug 46174) |
| 98 | if ( |
| 99 | $params['title'] && |
| 100 | !$title->equals( Title::newFromText( $params['title'], NS_SCHEMA ) ) |
| 101 | ) { |
| 102 | $this->dieWithError( |
| 103 | [ 'apierror-revwrongpage', $params['revid'], wfEscapeWikiText( $params['title'] ) ], |
| 104 | null, null, 400 |
| 105 | ); |
| 106 | } |
| 107 | |
| 108 | // Else use $params['title'] and get the latest revision |
| 109 | } else { |
| 110 | $title = Title::newFromText( $params['title'], NS_SCHEMA ); |
| 111 | if ( !$title || !$title->exists() || !$title->inNamespace( NS_SCHEMA ) ) { |
| 112 | $this->dieWithError( |
| 113 | [ 'apierror-invalidtitle', wfEscapeWikiText( $params['title'] ) ], null, null, 400 |
| 114 | ); |
| 115 | } |
| 116 | |
| 117 | $revRecord = $revLookup->getRevisionById( $title->getLatestRevID() ); |
| 118 | if ( !$revRecord ) { |
| 119 | $this->dieWithError( |
| 120 | [ 'apierror-nosuchrevid', $title->getLatestRevID() ], null, null, 400 |
| 121 | ); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /** @var JsonSchemaContent $content */ |
| 126 | $content = $revRecord->getContent( SlotRecord::MAIN ); |
| 127 | if ( !$content ) { |
| 128 | $this->dieWithError( |
| 129 | [ 'apierror-nosuchrevid', $revRecord->getId() ], |
| 130 | null, null, 400 |
| 131 | ); |
| 132 | } |
| 133 | |
| 134 | $this->markCacheable( $revRecord ); |
| 135 | '@phan-var JsonSchemaContent $content'; |
| 136 | $schema = $content->getJsonData(); |
| 137 | |
| 138 | $result = $this->getResult(); |
| 139 | $result->addValue( null, 'title', $title->getText() ); |
| 140 | foreach ( $schema as $k => &$v ) { |
| 141 | if ( $k === 'properties' ) { |
| 142 | foreach ( $v as &$properties ) { |
| 143 | $properties[ApiResult::META_BC_BOOLS] = [ 'required' ]; |
| 144 | } |
| 145 | } |
| 146 | $result->addValue( null, $k, $v ); |
| 147 | } |
| 148 | } |
| 149 | } |