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<?php
namespace MediaWiki\Rest\Handler;
use MediaWiki\Config\Config;
use MediaWiki\Config\ServiceOptions;
use MediaWiki\MainConfigNames;
use MediaWiki\Rest\LocalizedHttpException;
use MediaWiki\Rest\Module\Module;
use MediaWiki\Rest\RequestData;
use MediaWiki\Rest\ResponseFactory;
use MediaWiki\Rest\SimpleHandler;
use MediaWiki\Rest\Validator\Validator;
use Wikimedia\Message\MessageValue;
use Wikimedia\ParamValidator\ParamValidator;
/**
* Core REST API endpoint that outputs an OpenAPI spec of a set of routes.
*/
class ModuleSpecHandler extends SimpleHandler {
public const MODULE_SPEC_PATH = '/coredev/v0/specs/module/{module}';
/**
* @internal
*/
private const CONSTRUCTOR_OPTIONS = [
MainConfigNames::RightsUrl,
MainConfigNames::RightsText,
MainConfigNames::EmergencyContact,
MainConfigNames::Sitename,
];
private ServiceOptions $options;
public function __construct( Config $config ) {
$options = new ServiceOptions( self::CONSTRUCTOR_OPTIONS, $config );
$options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS );
$this->options = $options;
}
public function run( $moduleName, $version = '' ): array {
// TODO: implement caching, get cache key from Router.
if ( $version !== '' ) {
$moduleName .= '/' . $version;
}
if ( $moduleName === '-' ) {
// Hack that allows us to fetch a spec for the empty module prefix
$moduleName = '';
}
$module = $this->getRouter()->getModule( $moduleName );
if ( !$module ) {
throw new LocalizedHttpException(
MessageValue::new( 'rest-unknown-module' )->params( $moduleName ),
404
);
}
return [
'openapi' => '3.0.0',
'info' => $this->getInfoSpec( $module ),
'servers' => $this->getServerSpec( $module ),
'paths' => $this->getPathsSpec( $module ),
'components' => $this->getComponentsSpec( $module ),
];
}
/**
* @see https://spec.openapis.org/oas/v3.0.0#info-object
*/
private function getInfoSpec( Module $module ): array {
// TODO: Let Modules provide their name, description, version, etc
$prefix = $module->getPathPrefix();
if ( $prefix === '' ) {
$title = "Default Module";
} else {
$title = "$prefix Module";
}
return $module->getOpenApiInfo() + [
'title' => $title,
'version' => 'undefined',
'license' => $this->getLicenseSpec(),
'contact' => $this->getContactSpec(),
];
}
private function getLicenseSpec(): array {
// TODO: get terms-of-use URL, not content license.
return [
'name' => $this->options->get( MainConfigNames::RightsText ),
'url' => $this->options->get( MainConfigNames::RightsUrl ),
];
}
private function getContactSpec(): array {
return [
'email' => $this->options->get( MainConfigNames::EmergencyContact ),
];
}
private function getServerSpec( Module $module ): array {
$prefix = $module->getPathPrefix();
if ( $prefix !== '' ) {
$prefix = "/$prefix";
}
return [
[
'url' => $this->getRouter()->getRouteUrl( $prefix ),
]
];
}
private function getPathsSpec( Module $module ): array {
$specs = [];
foreach ( $module->getDefinedPaths() as $path => $methods ) {
foreach ( $methods as $mth ) {
$key = strtolower( $mth );
$mth = strtoupper( $mth );
$specs[ $path ][ $key ] = $this->getRouteSpec( $module, $path, $mth );
}
}
return $specs;
}
private function getRouteSpec( Module $module, string $path, string $method ): array {
$request = new RequestData( [ 'method' => $method ] );
$handler = $module->getHandlerForPath( $path, $request, false );
$operationSpec = $handler->getOpenApiSpec( $method );
return $operationSpec;
}
private function getComponentsSpec( Module $module ) {
$components = [];
// XXX: also collect reusable components from handler specs (but how to avoid name collisions?).
$componentsSources = [
[ 'schemas' => Validator::getParameterTypeSchemas() ],
ResponseFactory::getResponseComponents()
];
// 2D merge
foreach ( $componentsSources as $cmps ) {
foreach ( $cmps as $name => $cmp ) {
$components[$name] = array_merge( $components[$name] ?? [], $cmp );
}
}
return $components;
}
public function getParamSettings() {
return [
'module' => [
self::PARAM_SOURCE => 'path',
ParamValidator::PARAM_TYPE => 'string',
ParamValidator::PARAM_REQUIRED => true,
],
'version' => [
self::PARAM_SOURCE => 'path',
ParamValidator::PARAM_TYPE => 'string',
ParamValidator::PARAM_DEFAULT => '',
],
];
}
}
|
