Generate OpenAPI from decorated classes

Author: Aleksi Pekkala

src/loaders/swaggerLoader.ts

@@ -1,14 +1,30 @@
+import { defaultMetadataStorage as classTransformerMetadataStorage } from 'class-transformer/storage';
+import { getFromContainer, MetadataStorage } from 'class-validator';
+import { validationMetadatasToSchemas } from 'class-validator-jsonschema';
 import basicAuth from 'express-basic-auth';
 import { MicroframeworkLoader, MicroframeworkSettings } from 'microframework-w3tec';
-import * as path from 'path';
+import { getMetadataArgsStorage } from 'routing-controllers';
+import { routingControllersToSpec } from 'routing-controllers-openapi';
 import * as swaggerUi from 'swagger-ui-express';
 
 import { env } from '../env';
 
 export const swaggerLoader: MicroframeworkLoader = (settings: MicroframeworkSettings | undefined) => {
     if (settings && env.swagger.enabled) {
         const expressApp = settings.getData('express_app');
-        const swaggerFile = require(path.join(__dirname, '..', env.swagger.file));
+
+        const { validationMetadatas } = getFromContainer(
+            MetadataStorage
+        ) as any;
+
+        const schemas = validationMetadatasToSchemas(validationMetadatas, {
+            classTransformerMetadataStorage,
+            refPointerPrefix: '#/components/schemas/',
+        });
+
+        const swaggerFile = routingControllersToSpec(getMetadataArgsStorage(), {}, {
+            components: { schemas },
+        });
 
         // Add npm infos to the swagger doc
         swaggerFile.info = {