Settings System (#46)

* feat(api): settings system

Also includes /auth/me endpoint for ticket ch76 and OpenAPI 3.0 compatibility for ch77

* refactor(api): remove unused imports

server/index.ts

@@ -1,12 +1,19 @@
-import express from 'express';
+import express, { Request, Response, NextFunction } from 'express';
 import next from 'next';
+import path from 'path';
 import { createConnection, getRepository } from 'typeorm';
 import routes from './routes';
 import bodyParser from 'body-parser';
 import cookieParser from 'cookie-parser';
 import session from 'express-session';
 import { TypeormStore } from 'connect-typeorm/out';
+import YAML from 'yamljs';
+import swaggerUi from 'swagger-ui-express';
+import { OpenApiValidator } from 'express-openapi-validator';
 import { Session } from './entity/Session';
+import { getSettings } from './lib/settings';
+
+const API_SPEC_PATH = path.join(__dirname, 'overseerr-api.yml');
 
 const dev = process.env.NODE_ENV !== 'production';
 const app = next({ dev });
@@ -16,7 +23,10 @@ createConnection();
 
 app
   .prepare()
-  .then(() => {
+  .then(async () => {
+    // Load Settings
+    getSettings().load();
+
     const server = express();
     server.use(cookieParser());
     server.use(bodyParser.json());
@@ -35,8 +45,41 @@ app
         }).connect(sessionRespository),
       })
     );
-    server.use('/api', routes);
+    const apiDocs = YAML.load(API_SPEC_PATH);
+    server.use('/api-docs', swaggerUi.serve, swaggerUi.setup(apiDocs));
+    await new OpenApiValidator({
+      apiSpec: API_SPEC_PATH,
+      validateRequests: true,
+      validateResponses: true,
+    }).install(server);
+    /**
+     * This is a workaround to convert dates to strings before they are validated by
+     * OpenAPI validator. Otherwise, they are treated as objects instead of strings
+     * and response validation will fail
+     */
+    server.use((req, res, next) => {
+      const original = res.json;
+      res.json = function jsonp(json) {
+        return original.call(this, JSON.parse(JSON.stringify(json)));
+      };
+      next();
+    });
+    server.use('/api/v1', routes);
     server.get('*', (req, res) => handle(req, res));
+    server.use(
+      (
+        err: { status: number; message: string; errors: string[] },
+        req: Request,
+        res: Response,
+        _next: NextFunction
+      ) => {
+        // format error
+        res.status(err.status || 500).json({
+          message: err.message,
+          errors: err.errors,
+        });
+      }
+    );
 
     const port = Number(process.env.PORT) || 3000;
     server.listen(port, (err) => {