-
Notifications
You must be signed in to change notification settings - Fork 5
/
app.js
318 lines (276 loc) · 7.39 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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
const express = require("express");
const app = require("http").createServer();
const io = require("socket.io")(app);
const fs = require("fs");
const socketIo = require("socket.io");
const port = process.env.PORT || 4002;
app.listen(port);
let rooms = [];
let users = {};
let viewers = {};
let votes = {};
let waffles = {};
const SERVER_STATUS = "server-status";
const START_SESSION = "start-session";
const JOIN_SESSION = "join-session";
const NO_SESSION = "no-session";
const CREATE_ROOM = "create-room";
const JOIN_ROOM = "join-room";
const LEAVE_ROOM = "leave-room";
const DISCONNECT = "disconnect";
const UPDATE_NAME = "person-update-name";
const UPDATE_ROOM = "person-list";
const PERSON_JOIN = "person-joined";
const NO_ROOM = "no-such-room";
const PROMOTE_USER = "promote-user";
const PROMOTED_USER = "promoted-user";
// Voting
const ROOM_SHOW_VOTES = "room-show-votes";
const ROOM_HIDE_VOTES = "room-hide-votes";
const ROOM_CLEAR_VOTES = "room-clear-votes";
const CAST_VOTE = "cast-vote";
const USERS_ONLINE = "users-online";
const ROOMS_ONLINE = "rooms-online";
const JOINED_ROOM = "joined-room";
const DEFAULT_NAME = " ... ";
const LAUNCH = "fire";
const MAX_NAME_LENGTH = 26;
function handler(req, res) {}
io.on("connection", function (socket) {
adviseServerStatus(socket);
socket.on(START_SESSION, function (data) {
createRoom(socket, data);
});
socket.on(DISCONNECT, function (data) {
delete users[socket.id];
delete viewers[socket.id];
delete votes[socket.id];
delete waffles[socket.id];
adviseServerStatus(socket);
});
socket.on(JOIN_SESSION, function (data) {
const roomId = data.roomId;
let room = getRoom(roomId);
if (room) {
// Private message to user, room id and user id of current user;
io.to(socket.id).emit(JOINED_ROOM, {
roomId,
userId: socket.id,
startTime: room.startTime,
});
} else {
io.to(socket.id).emit(NO_SESSION, {
userId: socket.id,
});
}
if (room) {
users[socket.id] = DEFAULT_NAME;
adviseServerStatus(socket);
joinRoom(roomId, socket);
log(JOIN_ROOM, roomId);
socket.on(LAUNCH, function (data) {
io.to(roomId).emit(LAUNCH);
});
socket.on(LEAVE_ROOM, function (data) {
leaveRoom(roomId, socket);
log(LEAVE_ROOM, { roomId, id: socket.id });
});
socket.on(DISCONNECT, function (data) {
leaveRoom(roomId, socket);
log(LEAVE_ROOM, { roomId, id: socket.id });
});
socket.on(UPDATE_NAME, function (data) {
users[socket.id] = data.name.substring(0, MAX_NAME_LENGTH).trim();
if (data.observer) {
viewers[socket.id] = true;
}
adviseRoom(roomId, socket);
});
socket.on(PROMOTE_USER, function (data) {
promoteUser(roomId, data.userId);
adviseRoom(roomId, socket);
});
socket.on(CAST_VOTE, function (data) {
if (!waffles[socket.id]) {
waffled =
votes[socket.id] != -1 &&
votes[socket.id] != data.vote &&
data.vote != false;
}
waffles[socket.id] = waffled;
votes[socket.id] = data.vote;
adviseRoom(roomId, socket);
});
socket.on(ROOM_SHOW_VOTES, function (data) {
room.showVotes = true;
waffles = {};
adviseRoom(roomId, socket);
io.to(roomId).emit(ROOM_SHOW_VOTES);
});
socket.on(ROOM_HIDE_VOTES, function (data) {
room.showVotes = false;
waffles = {};
adviseRoom(roomId, socket);
io.to(roomId).emit(ROOM_HIDE_VOTES);
});
socket.on(ROOM_CLEAR_VOTES, function (data) {
room.showVotes = false;
waffles = {};
clearVotes(roomId, socket);
io.to(roomId).emit(ROOM_HIDE_VOTES, { data: "new" });
});
} else {
socket.emit(NO_ROOM, { data: roomId });
log(NO_ROOM, roomId);
}
});
});
function getRoom(roomId) {
return rooms.find((room) => roomId === room.id);
}
function getRoomUsers(roomId) {
let room = getRoom(roomId);
if (!room) {
return false;
}
return room.users.map((id) => ({
id,
name: users[id],
new: users[id] == DEFAULT_NAME,
vote: getVote(id, roomId),
leaderUser: getLeaderUser(id, roomId),
waffled: getWaffled(id),
observer: getObserver(id),
}));
}
function getRoomVotes(roomId) {
let room = getRoom(roomId);
if (!room) {
return false;
}
return room.votes;
}
function getLeaderUser(id, roomId) {
let room = getRoom(roomId);
return room.leaderUser === id;
}
function getVote(id, roomId) {
let room = getRoom(roomId);
return room.showVotes ? votes[id] : !!votes[id];
}
function getWaffled(id) {
return waffles[id];
}
function getObserver(id) {
return viewers[id];
}
function leaveRoom(roomId, socket) {
let room = getRoom(roomId);
if (room) {
room.users = room.users.filter((user) => user !== socket.id);
if (room.users.length < 1) {
deleteRoom(roomId);
adviseServerStatus(socket);
}
adviseRoom(roomId, socket);
}
delete users[socket.id];
delete votes[socket.id];
delete viewers[socket.id];
delete waffles[socket.id];
}
function cleanUpRooms(socket) {
rooms.forEach((room) => {
let roomUsers = getRoomUsers(room.id);
if (roomUsers.length < 1) {
deleteRoom(room.id);
adviseServerStatus(socket);
}
});
}
function deleteRoom(roomId) {
let index = rooms.findIndex((room) => room.id === roomId);
if (index > -1) {
rooms.splice(index, 1);
}
}
function adviseRoom(roomId, socket) {
let roomUsers = getRoomUsers(roomId);
let roomVotes = getRoomVotes(roomId);
io.to(roomId).emit(UPDATE_ROOM, {
viewers: viewers,
users: roomUsers,
votes: roomVotes,
});
}
function clearVotes(roomId, socket) {
let roomUsers = getRoomUsers(roomId, socket);
if (!roomUsers) {
return;
}
roomUsers.forEach((user) => removeVote(user.id));
adviseRoom(roomId, socket);
}
function removeVote(id) {
votes[id] = null;
waffles[id] = null;
}
function promoteUser(roomId, socketId) {
let room = getRoom(roomId);
room.leaderUser = socketId;
io.to(roomId).emit(PROMOTED_USER, { id: socketId });
}
function joinRoom(roomId, socket) {
let room = getRoom(roomId);
if (room.users < 1) {
setTimeout(() => {
promoteUser(roomId, socket.id);
}, 150);
}
room.users.push(socket.id);
socket.join(roomId);
adviseRoom(roomId, socket);
}
function createRoom(socket, data) {
let time = Date.now();
let roomId = makeId(12);
io.emit(CREATE_ROOM, { data: roomId, votes: data.votes });
socket.join(roomId);
let room = {
id: roomId,
users: [],
showVotes: false,
votes: data.votes,
startTime: time,
};
rooms.push(room);
adviseServerStatus(socket);
}
function usersOnline() {
return Object.keys(users).length;
}
function roomsOnline() {
return rooms.length;
}
function adviseServerStatus(socket) {
let data = {
status: true,
users: usersOnline(),
rooms: roomsOnline(),
};
socket.emit(SERVER_STATUS, data);
socket.broadcast.emit(SERVER_STATUS, data);
}
function log(msg, data = null) {
console.log(msg, data);
}
function makeId(length) {
var result = "";
var characters =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWYXZ0123456789";
var charactersLength = characters.length;
for (var i = 0; i < length; i++) {
result += characters.charAt(Math.floor(Math.random() * charactersLength));
}
return result;
}