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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Rest\Module; |
| 4 | |
| 5 | use MediaWiki\Config\ServiceOptions; |
| 6 | use MediaWiki\MainConfigNames; |
| 7 | use MediaWiki\Rest\JsonLocalizer; |
| 8 | use MediaWiki\Rest\ResponseFactory; |
| 9 | use Wikimedia\ObjectCache\BagOStuff; |
| 10 | |
| 11 | /** |
| 12 | * Manages information related to REST modules, such as routes and specs |
| 13 | * |
| 14 | * TODO: consider whether some code in Router or SpecBasedModule might be better placed here. |
| 15 | * TODO: consider whether we should inject a ModuleManager instance into Router for shared caching. |
| 16 | * |
| 17 | * @since 1.46 |
| 18 | */ |
| 19 | class ModuleManager { |
| 20 | // These modules will be enabled. No config entry is needed. |
| 21 | private const CORE_ROUTE_FILES = [ |
| 22 | 'includes/Rest/coreRoutes.json', |
| 23 | ]; |
| 24 | |
| 25 | // These specs will be available in the Rest Sandbox. No config change is needed. |
| 26 | private const CORE_SPECS = [ |
| 27 | 'mw-extra' => [ |
| 28 | 'url' => '/rest.php/specs/v0/module/-', |
| 29 | 'name' => 'MediaWiki REST API (routes not in modules)', |
| 30 | ] |
| 31 | ]; |
| 32 | |
| 33 | /** Seconds to persist module definitions on cache */ |
| 34 | private const MODULE_DEFINITION_TTL = 60; |
| 35 | |
| 36 | /** @var string[]|null */ |
| 37 | private ?array $routeFiles = null; |
| 38 | |
| 39 | private string $extensionDirectory; |
| 40 | |
| 41 | private array $restApiAdditionalRouteFiles; |
| 42 | private array $restSandboxSpecs; |
| 43 | |
| 44 | private string $scriptPath; |
| 45 | |
| 46 | /** Persistent local server/host cache (e.g. APCu) */ |
| 47 | private BagOStuff $srvCache; |
| 48 | |
| 49 | private ResponseFactory $responseFactory; |
| 50 | |
| 51 | /** |
| 52 | * @internal |
| 53 | */ |
| 54 | public const CONSTRUCTOR_OPTIONS = [ |
| 55 | MainConfigNames::ExtensionDirectory, |
| 56 | MainConfigNames::RestAPIAdditionalRouteFiles, |
| 57 | MainConfigNames::RestSandboxSpecs, |
| 58 | MainConfigNames::ScriptPath |
| 59 | ]; |
| 60 | |
| 61 | /** |
| 62 | * @param ServiceOptions $options |
| 63 | * @param BagOStuff $srvCache Optional BagOStuff instance to an APC-style cache. |
| 64 | * @param ResponseFactory $responseFactory |
| 65 | * |
| 66 | * @internal |
| 67 | */ |
| 68 | public function __construct( ServiceOptions $options, BagOStuff $srvCache, ResponseFactory $responseFactory ) { |
| 69 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 70 | |
| 71 | $this->extensionDirectory = $options->get( MainConfigNames::ExtensionDirectory ); |
| 72 | $this->restApiAdditionalRouteFiles = $options->get( MainConfigNames::RestAPIAdditionalRouteFiles ); |
| 73 | $this->restSandboxSpecs = $options->get( MainConfigNames::RestSandboxSpecs ); |
| 74 | $this->scriptPath = $options->get( MainConfigNames::ScriptPath ); |
| 75 | |
| 76 | $this->srvCache = $srvCache; |
| 77 | $this->responseFactory = $responseFactory; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * @return string[] |
| 82 | */ |
| 83 | public function getRouteFiles(): array { |
| 84 | if ( $this->routeFiles === null ) { |
| 85 | $this->routeFiles = $this->initRouteFiles(); |
| 86 | } |
| 87 | |
| 88 | return $this->routeFiles; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @return string[] |
| 93 | */ |
| 94 | private function initRouteFiles(): array { |
| 95 | global $IP; |
| 96 | |
| 97 | // Always include the "official" routes. Include additional routes if specified. |
| 98 | // Routes in extensions are added to RestAPIAdditionalRouteFiles by ExtensionProcessor. |
| 99 | $routeFiles = array_merge( |
| 100 | self::CORE_ROUTE_FILES, |
| 101 | $this->restApiAdditionalRouteFiles |
| 102 | ); |
| 103 | |
| 104 | foreach ( $routeFiles as &$file ) { |
| 105 | if ( str_starts_with( $file, '/' ) ) { |
| 106 | // Allow absolute paths on non-Windows |
| 107 | } elseif ( str_starts_with( $file, 'extensions/' ) ) { |
| 108 | // Support hacks like Wikibase.ci.php |
| 109 | $file = substr_replace( $file, $this->extensionDirectory, |
| 110 | 0, strlen( 'extensions' ) ); |
| 111 | } else { |
| 112 | $file = "$IP/$file"; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | return $routeFiles; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Returns true if any api specs are available, or false otherwise. |
| 121 | * |
| 122 | * @return bool |
| 123 | */ |
| 124 | public function hasApiSpecs(): bool { |
| 125 | return $this->getApiSpecDefs() !== []; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Returns the available choices for APIs to explore. |
| 130 | * |
| 131 | * @return array<string,array<string,string>> |
| 132 | */ |
| 133 | public function getApiSpecs(): array { |
| 134 | $specs = $this->getApiSpecDefs(); |
| 135 | |
| 136 | foreach ( $specs as $key => &$spec ) { |
| 137 | // Translate any message keys from config to a displayable name string |
| 138 | $localizer = new JsonLocalizer( $this->responseFactory ); |
| 139 | if ( isset( $spec['msg'] ) ) { |
| 140 | $spec['name'] = $localizer->getFormattedMessage( $spec['msg'] ); |
| 141 | unset( $spec['msg'] ); |
| 142 | } |
| 143 | |
| 144 | // Extract values from module definition files. Only load a file if necessary. |
| 145 | if ( isset( $spec['file'] ) ) { |
| 146 | $spec = $this->populateFromFile( $spec, $this->scriptPath ); |
| 147 | } elseif ( !isset( $spec['name'] ) ) { |
| 148 | // If we were otherwise unable to get a name, use the key |
| 149 | $spec['name'] = $key; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return $specs; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Gets the available API spec definition information. |
| 158 | * These need further processing before use by the REST Sandbox. |
| 159 | * |
| 160 | * @see MainConfigSchema::RestSandboxSpecs for the structure of the array |
| 161 | * |
| 162 | * @return array<string,array<string,string>> |
| 163 | */ |
| 164 | private function getApiSpecDefs(): array { |
| 165 | $coreSpecs = self::CORE_SPECS; |
| 166 | |
| 167 | // Adjust core specs and merge with specs from config, giving config priority |
| 168 | foreach ( $coreSpecs as &$coreSpec ) { |
| 169 | if ( isset( $coreSpec['url'] ) ) { |
| 170 | $coreSpec['url'] = $this->scriptPath . $coreSpec['url']; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | return array_merge( $coreSpecs, $this->restSandboxSpecs ); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Populates any missing spec details from the input module definition file |
| 179 | * |
| 180 | * @param array<string,string> $spec The sandbox spec. Must have a 'file' key. |
| 181 | * @param string $scriptPath |
| 182 | * |
| 183 | * @return array<string,string> |
| 184 | */ |
| 185 | private function populateFromFile( array $spec, string $scriptPath ): array { |
| 186 | $hasUrl = isset( $spec['url'] ); |
| 187 | $hasName = isset( $spec['name'] ) || isset( $spec['msg'] ); |
| 188 | if ( !$hasUrl || !$hasName ) { |
| 189 | // Get any missing information from the module definition file, giving config priority |
| 190 | $moduleDefInfo = $this->getModuleDefinitionInfo( $spec['file'] ); |
| 191 | if ( !$hasName ) { |
| 192 | $spec['name'] = $moduleDefInfo['title']; |
| 193 | } |
| 194 | |
| 195 | if ( !$hasUrl ) { |
| 196 | $spec['url'] = $scriptPath . '/rest.php/specs/v0/module/' . $moduleDefInfo['moduleId']; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | return $spec; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Gets necessary info from the module definition info, from cache if possible, |
| 205 | * from the definition file otherwise. |
| 206 | * |
| 207 | * @param string $file The module definition file to load |
| 208 | * |
| 209 | * @return array<string,string> |
| 210 | */ |
| 211 | private function getModuleDefinitionInfo( string $file ): array { |
| 212 | $key = $this->srvCache->makeKey( |
| 213 | __CLASS__, |
| 214 | 'definition', |
| 215 | sha1( $file ), |
| 216 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 217 | (int)@filemtime( $file ), |
| 218 | implode( ',', $this->responseFactory->getLangCodes() ) |
| 219 | ); |
| 220 | |
| 221 | return $this->srvCache->getWithSetCallback( |
| 222 | $key, |
| 223 | self::MODULE_DEFINITION_TTL, |
| 224 | function () use ( $file ) { |
| 225 | $md = SpecBasedModule::loadModuleDefinition( $file, $this->responseFactory ); |
| 226 | return [ |
| 227 | 'moduleId' => $md['moduleId'], |
| 228 | 'title' => $md['info']['title'] |
| 229 | ]; |
| 230 | } |
| 231 | ); |
| 232 | } |
| 233 | } |