-
Notifications
You must be signed in to change notification settings - Fork 3
/
app.js
executable file
·255 lines (236 loc) · 6.38 KB
/
app.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
var app = require('http').createServer(handler),
io = require('socket.io').listen(app),
Handlers = require('./lib/handlers.js'),
settings = require('./config/host').settings(),
DB = require('./lib/db');
/* Listen app with configs. */
app.listen(settings.server.port, settings.server.host);
/* Socket.io configs */
io.set("browser client minification", 1);
io.set('log level', 1);
/* Server Handler
*
* Process requests.
* Serve Static Files
*
*/
function handler(req, res) {
/* POST METHOD */
if (req.method == "POST") {
Handlers.postHandler(req, res);
} else {
Handlers.staticHandler(req, res);
}
}
/* Socket Processes
* All communications is here.
*
*
*/
io.sockets.on('connection', function(socket) {
/* Messager
*
* For simple development and single responsibility,
* keeps main processes in this object.
*
*/
var messager = {};
/* Attempt Login
* Attempts user login with new or exist user.
*
* @Processes findUser or addUser
*
*/
messager.attemptLogin = function(user, cb) {
(user.id) ? messager.findUser(user, cb) : messager.addUser(user, cb);
};
/* Find User
*
* Finds User informations to DB.
* @Model: User
*
*
*/
messager.findUser = function(user, cb) {
DB.User.findOne({
name: user.name
}, function(err, u) {
if (err) return;
if (cb) return cb(u);
});
};
/* Add User
*
* Adds User informations to DB.
* @Model: User
*
*
*/
messager.addUser = function(user, cb) {
//if(typeof user.id == )
var u = new DB.User({
name: user.name
});
u.save(function(err) {
if (err) return;
if (cb) return cb(u);
});
};
/* Login After Filter
*
* Works when user login on chat.
* If user relogin skipped next processes.
*
* Processes: updateOnlines, getRecentMessages and callback...
* @Emitters: client.system.message
*
*
*/
messager.loginAfter = function(user, cb) {
messager.updateOnlines(function() {
if (!user.id) {
messager.getRecentMessages(function() {
socket.broadcast.emit("client.system.message", {
user: "Sistem",
message: socket.user.name + ' connected.'
});
if (cb) return cb();
});
} else {
if (cb) return cb();
}
});
};
/* Logout After Filter
*
* Processes: UpdateOnlines.
* @Emitters: client.system.message
*
*
*/
messager.logoutAfter = function() {
messager.updateOnlines(function() {
socket.broadcast.emit("client.system.message", {
message: socket.user.name + ' disconnected.'
});
});
};
/* Online Users Updater
*
* Get Online Users
* @Model: User
* @Emitters: client.updateUsers
*
*
*/
messager.updateOnlines = function(cb) {
DB.User.find({}, function(err, users) {
io.sockets.emit("client.updateUsers", users);
if (cb) return cb();
});
};
/* History Reader
*
* Get recent 20 messages from DB.
* @Model: Message
* @Emitters: history.read
*
*
*/
messager.getRecentMessages = function(cb) {
DB.Message.find({}).sort({
date: -1
}).limit(20).exec(function(err, messages) {
socket.emit("history.read", messages);
if (cb) return cb();
});
};
/* Message Sender
*
* Sends message to all users,
* Notifications to subscribers.
* @Model Message
* @Emitters: client.message.get, client.notification.message.send
*
*
*/
socket.on('client.message.send', function(data) {
io.sockets.emit("client.message.get", {
user: socket.user.name,
message: data
});
socket.broadcast.emit('client.notification.message.send');
new DB.Message({
user: socket.user.name,
message: data
}).save();
});
/* User Login
*
* If user relogin so server crashed and again refreshed,
* we use 'user' object on loginAfter filter
* for keep user session with same user informations.
*
* @Processes: attemtLogin
* @Emitters: login.after
*
*
*/
socket.on("login", function(user) {
messager.attemptLogin(user, function(loggedinUser) {
socket.user = {
id: loggedinUser._id,
name: loggedinUser.name
};
socket.emit("login.after", socket.user);
messager.loginAfter(user);
});
});
/* Socket Disconnected
*
* Delete User Form DB. Notify other users...
*
* @Model User
* @Processes: logoutAfter
*
*
*/
socket.on("disconnect", function() {
if (typeof socket.user !== "undefined" && socket.user) {
DB.User.findById(socket.user.id, function(err, user) {
if (err) next();
user.remove();
messager.logoutAfter();
});
}
});
});
/* Delete Old Message from MongoDB.
*
* Run one time immediately, after run with setInterval timer.
* @time 1 hour.
* @deleteCount All messages except last 20 messages.
*
*
*/
(function() {
function deleteOldMessages() {
DB.Message.count({}, function(e, count) {
deleteCount = count - 20; //Keep last 20 message.
if (deleteCount > 20) {
var q = DB.Message.find()
.sort('date')
.limit(deleteCount);
q.exec(function(err, messages) {
for (i in messages) {
messages[i].remove();
}
});
}
});
}
deleteOldMessages();
setInterval(function() {
deleteOldMessages();
}, 1000 * 60 * 60);
})(DB.Message);