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1 | 'use strict'; | |
2 | ||
3 | const Koa = require('koa'); | |
4 | const KoaBodyParser = require('koa-bodyparser'); | |
5 | const KoaJwt = require('koa-jwt'); | |
6 | const KoaRoute = require('koa-route'); | |
7 | const KoaSend = require('koa-send'); | |
8 | const KoaStatic = require('koa-static'); | |
9 | const Path = require('path'); | |
10 | ||
11 | const AuthHandler = require('./handlers/auth'); | |
12 | const PostsHandler = require('./handlers/posts'); | |
13 | ||
14 | const internals = {}; | |
15 | ||
16 | internals.k401Location = '/401.html'; | |
17 | internals.kMainLocation = '/'; | |
18 | ||
19 | /** | |
20 | * The Dasein class is the main entry point for the application. | |
21 | * | |
22 | * @class Dasein | |
23 | * @param {Dasein.tConfiguration} config the initialization options to | |
24 | * extend the instance | |
25 | */ | |
26 | module.exports = internals.Dasein = class Dasein { | |
27 | ||
28 | constructor(config) { | |
29 | ||
30 | Object.assign(this, config); | |
31 | } | |
32 | ||
33 | /** | |
34 | * Initializes the application and starts listening. Also prints a | |
35 | * nice robotic banner with information. | |
36 | * | |
37 | * @function run | |
38 | * @memberof Dasein | |
39 | * @instance | |
40 | */ | |
41 | run() { | |
42 | ||
43 | this._initializeServer(); | |
44 | this._startServer(); | |
45 | this._printBanner(); | |
46 | ||
47 | return Promise.resolve(); | |
48 | } | |
49 | ||
50 | // Initializes the Koa application and all the handlers. | |
51 | ||
52 | _initializeServer() { | |
53 | ||
54 | const self = this; | |
55 | ||
56 | this._app = Koa(); | |
57 | ||
58 | this._app.use(KoaStatic(this.staticDirectory)); | |
59 | this._app.use(KoaBodyParser()); | |
60 | ||
61 | // Error handler | |
62 | ||
63 | this._app.use(function * (next) { | |
64 | ||
65 | try { | |
66 | yield next; | |
67 | } | |
68 | catch (err) { | |
69 | this.status = err.status || 500; | |
70 | ||
71 | const response = { | |
72 | error: err.message, | |
73 | status: this.status | |
74 | }; | |
75 | ||
76 | if (response.status === 401) { | |
77 | response.error === 'Protected resource, use Authorization header to get access'; | |
78 | } | |
79 | ||
80 | this.body = response; | |
81 | ||
82 | this.app.emit('error', err, this); | |
83 | } | |
84 | }); | |
85 | ||
86 | this._app.use(KoaJwt({ | |
87 | secret: this.jwt.secret, | |
88 | passthrough: true | |
89 | })); | |
90 | ||
91 | this._initializeAuthRoutes(); | |
92 | this._initializePostsRoutes(); | |
93 | ||
94 | this._app.use(function * () { | |
95 | ||
96 | yield KoaSend(this, Path.join(self.staticDirectory, 'index.html')); | |
97 | }); | |
98 | ||
99 | } | |
100 | ||
101 | // Initialize routes for auth | |
102 | ||
103 | _initializeAuthRoutes() { | |
104 | ||
105 | const authHandler = new AuthHandler({ | |
106 | jwt: this.jwt, | |
107 | twitter: this.twitter | |
108 | }); | |
109 | this._app.use(KoaRoute.get('/api/auth/login', authHandler.login())); | |
110 | this._app.use(KoaRoute.post('/api/auth/callback', authHandler.callback())); | |
111 | } | |
112 | ||
113 | // Initialize routes for posts | |
114 | ||
115 | _initializePostsRoutes() { | |
116 | ||
117 | const postsHandler = new PostsHandler({ | |
118 | ttl: this.ttl, | |
119 | redis: this.redis | |
120 | }); | |
121 | this._app.use(KoaRoute.get('/api/posts', postsHandler.findAll())); | |
122 | this._app.use(KoaRoute.get('/api/posts/:id', postsHandler.find())); | |
123 | this._app.use(KoaRoute.post('/api/posts', postsHandler.create())); | |
124 | this._app.use(KoaRoute.delete('/api/posts/:id', postsHandler.delete())); | |
125 | ||
126 | } | |
127 | ||
128 | // Starts listening | |
129 | ||
130 | _startServer() { | |
131 | ||
132 | this._app.listen(this.port); | |
133 | } | |
134 | ||
135 | // Prints the banner. | |
136 | ||
137 | _printBanner() { | |
138 | ||
139 | console.log(' .'); | |
140 | console.log(' /'); | |
141 | console.log(' +-----+'); | |
142 | console.log(` | o o | - Listening Gladly, Try me on port: ${this.port}`); | |
143 | console.log(' +-----+'); | |
144 | console.log(' +---------+'); | |
145 | console.log(' /| [][] |\\'); | |
146 | console.log(' || | |'); | |
147 | console.log(' || | \\c'); | |
148 | console.log(' ^+---------+'); | |
149 | console.log(' (.) '); | |
150 | } | |
151 | }; |