Merge branch 'release/1.0.0'

[rbdr/dasein] / lib / dasein.js

diff --git a/lib/dasein.js b/lib/dasein.js
index 8de32c8eb05a611661ff257022d576d7b7c25674..5b8486a09806a132be9ae8d262b39c331a677313 100644 (file)
--- a/lib/dasein.js
+++ b/lib/dasein.js
@@ -1,13 +1,165 @@
 'use strict';
 
+const Koa = require('koa');
+const KoaBodyParser = require('koa-bodyparser');
+const KoaJwt = require('koa-jwt');
+const KoaRoute = require('koa-route');
+const KoaSend = require('koa-send');
+const KoaStatic = require('koa-static');
+const Path = require('path');
+
+const AuthHandler = require('./handlers/auth');
+const PostsHandler = require('./handlers/posts');
+const CommentsHandler = require('./handlers/comments');
+
 const internals = {};
 
+internals.k401Location = '/401.html';
+internals.kMainLocation = '/';
+
+/**
+ * The Dasein class is the main entry point for the application.
+ *
+ * @class Dasein
+ * @param {Dasein.tConfiguration} config the initialization options to
+ * extend the instance
+ */
 module.exports = internals.Dasein = class Dasein {
 
+  constructor(config) {
+
+    Object.assign(this, config);
+  }
+
+  /**
+   * Initializes the application and starts listening. Also prints a
+   * nice robotic banner with information.
+   *
+   * @function run
+   * @memberof Dasein
+   * @instance
+   */
   run() {
 
-    console.log('OK');
+    this._initializeServer();
+    this._startServer();
+    this._printBanner();
 
     return Promise.resolve();
   }
+
+  // Initializes the Koa application and all the handlers.
+
+  _initializeServer() {
+
+    const self = this;
+
+    this._app = Koa();
+
+    this._app.use(KoaStatic(this.staticDirectory));
+    this._app.use(KoaBodyParser());
+
+    // Error handler
+
+    this._app.use(function * (next) {
+
+      try {
+        yield next;
+      }
+      catch (err) {
+        this.status = err.status || 500;
+
+        const response = {
+          error: err.message,
+          status: this.status
+        };
+
+        if (response.status === 401) {
+          response.error === 'Protected resource, use Authorization header to get access';
+        }
+
+        this.body = response;
+
+        this.app.emit('error', err, this);
+      }
+    });
+
+    this._app.use(KoaJwt({
+      secret: this.jwt.secret,
+      passthrough: true
+    }));
+
+    this._initializeAuthRoutes();
+    this._initializePostsRoutes();
+    this._initializeCommentsRoutes();
+
+    this._app.use(function * () {
+
+      yield KoaSend(this, Path.join(self.staticDirectory, 'index.html'));
+    });
+
+  }
+
+  // Initialize routes for auth
+
+  _initializeAuthRoutes() {
+
+    const authHandler = new AuthHandler({
+      jwt: this.jwt,
+      twitter: this.twitter
+    });
+    this._app.use(KoaRoute.get('/api/auth/login', authHandler.login()));
+    this._app.use(KoaRoute.post('/api/auth/callback', authHandler.callback()));
+  }
+
+  // Initialize routes for posts
+
+  _initializePostsRoutes() {
+
+    const postsHandler = new PostsHandler({
+      ttl: this.ttl,
+      redis: this.redis
+    });
+    this._app.use(KoaRoute.get('/api/posts', postsHandler.findAll()));
+    this._app.use(KoaRoute.get('/api/posts/:id', postsHandler.find()));
+    this._app.use(KoaRoute.post('/api/posts', postsHandler.create()));
+    this._app.use(KoaRoute.delete('/api/posts/:id', postsHandler.delete()));
+
+  }
+
+  // Initialize routes for comments
+
+  _initializeCommentsRoutes() {
+
+    const commentsHandler = new CommentsHandler({
+      ttl: this.ttl,
+      redis: this.redis
+    });
+    this._app.use(KoaRoute.get('/api/posts/:postId/comments', commentsHandler.findAll()));
+    this._app.use(KoaRoute.post('/api/posts/:postId/comments', commentsHandler.create()));
+  }
+
+  // Starts listening
+
+  _startServer() {
+
+    this._app.listen(this.port);
+  }
+
+  // Prints the banner.
+
+  _printBanner() {
+
+    console.log('        .');
+    console.log('       /');
+    console.log('    +-----+');
+    console.log(`    | o o |  - Listening Gladly, Try me on port: ${this.port}`);
+    console.log('    +-----+');
+    console.log('  +---------+');
+    console.log(' /|    [][] |\\');
+    console.log(' ||         | |');
+    console.log(' ||         |  \\c');
+    console.log(' ^+---------+');
+    console.log('      (.) ');
+  }
 };