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'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() {
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(' (.) ');
}
};
|
