-
Notifications
You must be signed in to change notification settings - Fork 0
/
app.js
439 lines (394 loc) · 12.8 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
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
// =======================
//the packages we need
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var morgan = require('morgan');
var mongoose = require('mongoose');
var expressValidator = require('express-validator');
var jwt = require('jsonwebtoken'); // used to create, sign, and verify tokens
var config = require('./config'); // get our config file
var User = require('./routes/user'); // get our mongoose model-user
var Ques = require('./routes/ques'); // get our mongoose model-ques
var Ans = require('./routes/ans'); // get our mongoose model-ans
// =======================
// configuration =========
// used to create, sign, and verify tokens
var port = process.env.PORT || 8080;
// connect to database
mongoose.connect(config.database);
mongoose.Promise = global.Promise;
// secret variable
app.set('superSecret', config.secret);
// use body parser so we can get info from POST and/or URL parameters
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
// use morgan to log requests to the console
app.use(morgan('dev'));
//Express Validator:
app.use(expressValidator({
errorFormatter: function(param,msg,value){
var namespace = param.split('.'),
root = namespace.shift(),
formParam = root;
while(namespace.lenght){
formParam+='[' + namespace.shift() + ']';
}
return{
param : formParam,
msg : msg,
value : value
};
}
}));
// =======================
// routes ================
// basic route
app.get('/', function(req, res) {
res.send('Hello! The API is at http://localhost:' + port + '/api');
});
//route to register a new user(POST http://localhost:3001/signup)
app.post('/signup', function(req, res,next) {
var firstname = req.body.firstname;
var lastname = req.body.lastname;
var email = req.body.email;
var password = req.body.password;
var password2 = req.body.password2;
req.checkBody('firstname','First name is reqired').notEmpty();
req.checkBody('lastname','Last name is reqired').notEmpty();
req.checkBody('email','Email is reqired').notEmpty();
req.checkBody('email','Email is not valid').isEmail();
req.checkBody('password','Password is reqired').notEmpty();
req.checkBody('password2','Both passwords do not match').equals(req.body.password);
var errors = req.validationErrors();
if(errors){
res.send({success:false,errors:errors});
}
else {
var newUser = new User({
firstname : firstname,
lastname : lastname,
email : email,
password : password
});
User.createUser(newUser,function(err,user){
if(err) throw err;
});
res.json({success:true});
}
});
// API ROUTES -------------------
// get an instance of the router for api routes
var apiRoutes = express.Router();
// route to authenticate a user (POST http://localhost:3001/api/authenticate)
apiRoutes.post('/authenticate', function(req, res,next) {
// find the user
User.findOne({
email: req.body.email
}, function(err, user) {
if (err) throw err;
if (!user) {
res.json({ success: false, errmsg: 'Authentication failed. User not found.' });
} else if (user) {
// check if password matches
User.comparePassword(req.body.password,user.password,function(err,isMatch){
if(err) throw err;
if(isMatch){
var token = jwt.sign(user, app.get('superSecret'), {
expiresIn: "10h" // expires in 10 hours
});
// return the information including token as JSON
res.json({ success:true, token:token });
}
else{
res.json({ success: false, errmsg: 'Authentication failed. Wrong password.' });
}
});
}
});
});
//middleware to authenticate user before accessing required resource
apiRoutes.use(function(req, res, next) {
// check header or url parameters or post parameters for token
var token = req.body.token || req.query.token || req.headers['x-access-token'];
// decode token
if (token) {
// verifies secret and checks exp
jwt.verify(token, app.get('superSecret'), function(err, decoded) {
if (err) {
return res.json({ success: false, message: 'Failed to authenticate token.' });
} else {
// if everything is good, save to request for use in other routes
req.decoded = decoded;
next();
}
});
} else {
// if there is no token
// return an error
return res.status(403).send({
success: false,
message: 'No token provided.'
});
}
});
// route to show a random message (GET http://localhost:3001/api/)
apiRoutes.get('/', function(req, res) {
res.json({success:true, message: 'Welcome to the QnA API' });
});
// route to show user detail (POST http://localhost:3001/api/profile)
apiRoutes.post('/profile',function(req,res) {
res.json({
"success":true,
"email": req.decoded._doc.email,
"lastname": req.decoded._doc.lastname,
"firstname": req.decoded._doc.firstname
});
});
//route to store the asked question(POST http://localhost:3001/api/asking)
apiRoutes.post('/asking', function(req, res) {
var userid = req.decoded._doc._id;
var question = req.body.question;
req.checkBody('question','Question field can not be empty').notEmpty();
var errors = req.validationErrors();
if(errors){
res.json({aksed:false,error:"Sorry! Empty question field is not allowed.",errors:errors});
}
else {
var newQues = new Ques({
userid : userid,
question : question
});
Ques.createQues(newQues,function(err,ques){
if(err) throw err;
else{
User.findOneAndUpdate(
{'_id':userid},
{$push:{'ques':ques._id}},
function(err,data){
}
)
res.json({asked:true});
}
});
}
});
// route to submit an answer (POST http://localhost:3001/api/answer)
apiRoutes.post('/answer',function(req,res){
var ans=req.body.ans;
req.checkBody('ans','Answer field can not be empty').notEmpty();
var errors = req.validationErrors();
if(errors){
res.json({success:false,error:"Sorry! Empty question field is not allowed."});
}
else{
Ques.findOne(
{'_id': req.body.id},
function(err,ques){
if(err){
res.json({success:false});
}
else{
var newAns = new Ans({
userid : req.decoded._doc._id,
ans : req.body.ans,
quesid:ques._id
});
Ans.createAns(newAns,function(err,ans){
if(err) {
res.json({success:false});
}
else{
var id=ans._id;
ques.ansid.push(id);
ques.save(function (err) {
if(err) {
res.json({success:false});
}
else{
User.findOne({ "_id" : req.decoded._doc._id },function(err,user){
user.ans.push(id);
user.save();
});
Ques.findOne({'_id': req.body.id}).then(function(ques){
res.json({"success":true,"new data": ques});
});
}
});
}
});
}
}
);
}
});
// route to get top 15 feeds (POST http://localhost:3001/api/feeds)
apiRoutes.post('/feeds', function(req, res) {
Ans.find({})
.sort({"up":-1})
.sort({"date":-1})
.limit(15)
.exec(function(err, ans) {
res.json({success:true,feeds:ans});
});
});
apiRoutes.post('/unanswered', function(req, res) {
Ques.find({ansid: {$size: 0} })
.sort('-date')
.limit(10)
.exec(function(err, quess) {
if(err){
res.json({success:false})
}
else {
res.json({success:true,unanswered:quess})
}
});
});
// route to get all the questions detail asked by a user (POST http://localhost:3001/api/quesactivity)
apiRoutes.post('/quesactivity', function(req, res) {
var userid = req.decoded._doc._id;
User.findOne({'_id':userid}, function(err, user) {
var ids = user.ques.map(function(id) { return id; });
Ques.find({_id: {$in: ids}}, function(err, docs) {
var result=docs.map(function(quess) { return ({id:quess._id,question:quess.question,answers:quess.ansid.length}); });
res.json({"result":result});
});
});
});
// route to get all the answers detail answered by a user (POST http://localhost:3001/api/ansactivity)
apiRoutes.post('/ansactivity', function(req, res) {
var userid = req.decoded._doc._id;
User.findOne({'_id':userid}, function(err, user) {
var ids = user.ans.map(function(id) { return id; });
Ans.find({_id: {$in: ids}}, function(err, docs) {
var result=docs.map(function(anss) { return ({id:anss._id,answer:anss.ans,quesid:anss.quesid,userid:anss.userid}); });
res.json({"result":result});
});
});
});
// route to get details of a particular question (POST http://localhost:3001/api/qdetail)
apiRoutes.post('/qdetail', function(req, res) {
var qid = req.body.id;
Ques.findOne({'_id':qid}, function(err, q) {
if(err){res.json({success:false})}
else{
res.json({success:true,q:q});
}
});
});
// route to get details of a particular answer (POST http://localhost:3001/api/adetail)
apiRoutes.post('/adetail', function(req, res) {
var aid = req.body.aid;
Ans.findOne({'_id':aid}, function(err, a) {
if(err){res.json({success:false})}
else{
res.json({success:true,a:a});
}
});
});
// route to get details of a particular user (POST http://localhost:3001/api/udetail)
apiRoutes.post('/udetail', function(req, res) {
var uid = req.body.uid;
User.findOne({'_id':uid})
.select('firstname lastname -_id')
.exec(function(err, u) {
if(err){res.json({success:false})}
else{
res.json({success:true,u:u});
}
});
});
// route to check whether a user upvoted a particular answer or not (POST http://localhost:3001/api/upstat)
apiRoutes.post('/upstat', function(req, res) {
var ansid = req.body.ansid;
var viewerid = req.decoded._doc._id
Ans.find({'_id':ansid,'up':viewerid},function(err,ans){
if(err){
res.json({upcon:false});
}
else{
if(ans.length>0){
res.json({upcon:true});
}
else {
res.json({upcon:false});
}
}
});
});
// route to check whether a user downvoted a particular answer or not (POST http://localhost:3001/api/downstat)
apiRoutes.post('/downstat', function(req, res) {
var ansid = req.body.ansid;
var viewerid = req.decoded._doc._id
Ans.find({'_id':ansid,'down':viewerid},function(err,ans){
if(err){
res.json({downcon:false});
}
else{
if(ans.length>0){
res.json({downcon:true});
}
else {
res.json({downcon:false});
}
}
});
});
// route to upvote a particular answer (by a particular user)
// or altering the upvote if it is already upvoted (POST http://localhost:3001/api/upvote)
apiRoutes.post('/upvote', function(req, res) {
var ansid = req.body.ansid;
var upBefore,upAfter;
Ans.findOne({'_id': ansid },function(err,ans){
upBefore=ans.up.length;
Ans.findOneAndUpdate(
{ "_id": ansid },{$addToSet:{up:req.decoded._doc._id}},{new: true}, function(err, doc){
if(err){
res.json({success:false});
}
upAfter=doc.up.length;
if(upAfter>upBefore)
{
res.json({success:true,upvoted:true,quan:upAfter});
}
else {
Ans.findOneAndUpdate(
{ "_id": ansid },{$pull: { up:req.decoded._doc._id} },function(err,doc){
res.json({success:true,upvoted:false,quan:upAfter-1});
})
}
}
);
});
});
// route to downvote a particular answer (by a particular user)
// or altering the downvote if it is already downvoted (POST http://localhost:3001/api/downvote)
apiRoutes.post('/downvote', function(req, res) {
var ansid = req.body.ansid;
var downBefore,downAfter;
Ans.findOne({'_id': ansid },function(err,ans){
downBefore=ans.down.length;
Ans.findOneAndUpdate(
{ "_id": ansid },{$addToSet:{down:req.decoded._doc._id}},{new: true}, function(err, doc){
if(err){
res.json({success:false});
}
downAfter=doc.down.length;
if(downAfter>downBefore)
{
res.json({success:true,downvoted:true,quan:downAfter});
}
else {
Ans.findOneAndUpdate(
{ "_id": ansid },{$pull: { down:req.decoded._doc._id} },function(err,doc){
res.json({success:true,downvoted:false,quan:downAfter-1});
})
}
}
);
});
});
// apply the routes to our application with the prefix '/api'
app.use('/api', apiRoutes);
module.exports = app;