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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Rest\Handler; |
| 4 | |
| 5 | use MediaWiki\Config\Config; |
| 6 | use MediaWiki\Config\ServiceOptions; |
| 7 | use MediaWiki\MainConfigNames; |
| 8 | use MediaWiki\Rest\LocalizedHttpException; |
| 9 | use MediaWiki\Rest\Module\Module; |
| 10 | use MediaWiki\Rest\RequestData; |
| 11 | use MediaWiki\Rest\ResponseFactory; |
| 12 | use MediaWiki\Rest\SimpleHandler; |
| 13 | use MediaWiki\Rest\Validator\Validator; |
| 14 | use Wikimedia\Message\MessageValue; |
| 15 | use Wikimedia\ParamValidator\ParamValidator; |
| 16 | |
| 17 | /** |
| 18 | * Core REST API endpoint that outputs an OpenAPI spec of a set of routes. |
| 19 | */ |
| 20 | class ModuleSpecHandler extends SimpleHandler { |
| 21 | |
| 22 | /** |
| 23 | * @internal |
| 24 | */ |
| 25 | private const CONSTRUCTOR_OPTIONS = [ |
| 26 | MainConfigNames::RightsUrl, |
| 27 | MainConfigNames::RightsText, |
| 28 | MainConfigNames::EmergencyContact, |
| 29 | MainConfigNames::Sitename, |
| 30 | ]; |
| 31 | |
| 32 | private ServiceOptions $options; |
| 33 | |
| 34 | public function __construct( Config $config ) { |
| 35 | $options = new ServiceOptions( self::CONSTRUCTOR_OPTIONS, $config ); |
| 36 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 37 | $this->options = $options; |
| 38 | } |
| 39 | |
| 40 | public function run( $moduleName, $version = '' ): array { |
| 41 | // TODO: implement caching, get cache key from Router. |
| 42 | |
| 43 | if ( $version !== '' ) { |
| 44 | $moduleName .= '/' . $version; |
| 45 | } |
| 46 | |
| 47 | if ( $moduleName === '-' ) { |
| 48 | // Hack that allows us to fetch a spec for the empty module prefix |
| 49 | $moduleName = ''; |
| 50 | } |
| 51 | |
| 52 | $module = $this->getRouter()->getModule( $moduleName ); |
| 53 | |
| 54 | if ( !$module ) { |
| 55 | throw new LocalizedHttpException( |
| 56 | MessageValue::new( 'rest-unknown-module' )->params( $moduleName ), |
| 57 | 404 |
| 58 | ); |
| 59 | } |
| 60 | |
| 61 | return [ |
| 62 | 'openapi' => '3.0.0', |
| 63 | 'info' => $this->getInfoSpec( $module ), |
| 64 | 'servers' => $this->getServerSpec( $module ), |
| 65 | 'paths' => $this->getPathsSpec( $module ), |
| 66 | 'components' => $this->getComponentsSpec( $module ), |
| 67 | ]; |
| 68 | } |
| 69 | |
| 70 | private function getInfoSpec( Module $module ): array { |
| 71 | // TODO: Let Modules provide their name, description, version, etc |
| 72 | $prefix = $module->getPathPrefix(); |
| 73 | |
| 74 | if ( $prefix === '' ) { |
| 75 | $title = "Default Module"; |
| 76 | } else { |
| 77 | $title = "$prefix Module"; |
| 78 | } |
| 79 | |
| 80 | return [ |
| 81 | 'title' => $title, |
| 82 | 'version' => 'undefined', |
| 83 | 'license' => $this->getLicenseSpec(), |
| 84 | 'contact' => $this->getContactSpec(), |
| 85 | ]; |
| 86 | } |
| 87 | |
| 88 | private function getLicenseSpec(): array { |
| 89 | return [ |
| 90 | 'name' => $this->options->get( MainConfigNames::RightsText ), |
| 91 | 'url' => $this->options->get( MainConfigNames::RightsUrl ), |
| 92 | ]; |
| 93 | } |
| 94 | |
| 95 | private function getContactSpec(): array { |
| 96 | return [ |
| 97 | 'email' => $this->options->get( MainConfigNames::EmergencyContact ), |
| 98 | ]; |
| 99 | } |
| 100 | |
| 101 | private function getServerSpec( Module $module ): array { |
| 102 | $prefix = $module->getPathPrefix(); |
| 103 | |
| 104 | if ( $prefix !== '' ) { |
| 105 | $prefix = "/$prefix"; |
| 106 | } |
| 107 | |
| 108 | return [ |
| 109 | [ |
| 110 | 'url' => $this->getRouter()->getRouteUrl( $prefix ), |
| 111 | ] |
| 112 | ]; |
| 113 | } |
| 114 | |
| 115 | private function getPathsSpec( Module $module ): array { |
| 116 | $specs = []; |
| 117 | |
| 118 | foreach ( $module->getDefinedPaths() as $path => $methods ) { |
| 119 | foreach ( $methods as $mth ) { |
| 120 | $key = strtolower( $mth ); |
| 121 | $mth = strtoupper( $mth ); |
| 122 | $specs[ $path ][ $key ] = $this->getRouteSpec( $module, $path, $mth ); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | return $specs; |
| 127 | } |
| 128 | |
| 129 | private function getRouteSpec( Module $module, string $path, string $method ): array { |
| 130 | $request = new RequestData( [ 'method' => $method ] ); |
| 131 | $handler = $module->getHandlerForPath( $path, $request, false ); |
| 132 | |
| 133 | $operationSpec = $handler->getOpenApiSpec( $method ); |
| 134 | |
| 135 | return $operationSpec; |
| 136 | } |
| 137 | |
| 138 | private function getComponentsSpec( Module $module ) { |
| 139 | $components = []; |
| 140 | |
| 141 | // XXX: also collect reusable components from handler specs (but how to avoid name collisions?). |
| 142 | $componentsSources = [ |
| 143 | [ 'schemas' => Validator::getParameterTypeSchemas() ], |
| 144 | ResponseFactory::getResponseComponents() |
| 145 | ]; |
| 146 | |
| 147 | // 2D merge |
| 148 | foreach ( $componentsSources as $cmps ) { |
| 149 | foreach ( $cmps as $name => $cmp ) { |
| 150 | $components[$name] = array_merge( $components[$name] ?? [], $cmp ); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | return $components; |
| 155 | } |
| 156 | |
| 157 | public function getParamSettings() { |
| 158 | return [ |
| 159 | 'module' => [ |
| 160 | self::PARAM_SOURCE => 'path', |
| 161 | ParamValidator::PARAM_TYPE => 'string', |
| 162 | ParamValidator::PARAM_REQUIRED => true, |
| 163 | ], |
| 164 | 'version' => [ |
| 165 | self::PARAM_SOURCE => 'path', |
| 166 | ParamValidator::PARAM_TYPE => 'string', |
| 167 | ParamValidator::PARAM_DEFAULT => '', |
| 168 | ], |
| 169 | ]; |
| 170 | } |
| 171 | |
| 172 | } |