-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathserver_sockets.js
More file actions
2015 lines (1736 loc) · 75.4 KB
/
server_sockets.js
File metadata and controls
2015 lines (1736 loc) · 75.4 KB
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
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
"use strict";
var classes = require('./available_classes');
var socketio = require('socket.io');
var database = require('./database_actions');
var hash = require('./hashes');
var pw = require('secure-password');
// Q allows use of promises.
// First, a promise is deferred.
// Then it is either rejected with an error message or resolved with any that
// needs to be returned.
var Q = require("q");
var logger = require('./logger_create');
module.exports = server_sockets;
// Takes a class id and username.
// If invalid, returns an error.
// If valid, a new user entry is created for the class in the global
// datastructure.
function add_user_to_class(username, class_id,socket_id) {
var deferred = Q.defer();
if (username === "") {
deferred.reject('Invalid username.');
return deferred.promise;
}
if (class_id in classes.available_classes) {
if (!(username in classes.available_classes[class_id]["user"])) {
classes.available_classes[class_id]["user"][username] = {};
classes.available_classes[class_id]["user"][username]["info"] = "";
classes.available_classes[class_id]["user"][username]["socket_id"] = socket_id;
deferred.resolve();
}
else {
deferred.reject('Username ' + username + ' is already taken.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id and username.
// If invalid, returns an error.
// If valid, the given user is deleted from the class in the global
// datastructure.
function remove_user_from_class(username, class_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (username in classes.available_classes[class_id]["user"]) {
delete classes.available_classes[class_id]["user"][username];
deferred.resolve();
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id.
// If invalid, returns an error.
// If valid, a JSON string of all groups and their contents in the class is
// returned. The data is retrieved from the global datastructure.
function get_all_groups_from_class(class_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
var groups = [];
for (var i in classes.available_classes[class_id]){
if (i != "user" && i != "class_name" && i != "settings"){
groups.push({
grp_name : i,
num : classes.available_classes[class_id][i]["students"].length
});
}
}
deferred.resolve(groups);
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a username, class id, and group id.
// If invalid, returns an error.
// If valid, a new user entry is created for the class group in the global
// datastructure.
function add_user_to_group(username, class_id, group_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (group_id in classes.available_classes[class_id]) {
if (username in classes.available_classes[class_id]["user"]) {
classes.available_classes[class_id][group_id]["students"].push(username);
var info = {};
var charges = [{name: username, x: 0, y: 0}];
info.charges = charges;
classes.available_classes[class_id]["user"][username]["info"] = JSON.stringify(info);
deferred.resolve();
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Group ID ' + group_id + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a username, class id, and group id.
// If invalid, returns an error.
// If valid, the given user is deleted from the class group in the global
// datastructure.
function remove_user_from_group(username, class_id, group_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (group_id in classes.available_classes[class_id]) {
if (username in classes.available_classes[class_id]["user"]) {
var index = classes.available_classes[class_id][group_id]["students"].indexOf(username);
if (index > -1) {
classes.available_classes[class_id][group_id]["students"].splice(index, 1);
classes.available_classes[class_id]["user"][username]["info"] = "{}";
deferred.resolve();
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Group ID ' + group_id + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id and group id
// If invalid, returns an error.
// If valid, a JSON string of all users and their contents in the class group
// is returned. The data is retrieved from the global datastructure.
function get_info_of_group(class_id, group_id) {
var deferred = Q.defer();
var other_members = [];
if (class_id in classes.available_classes) {
if (group_id in classes.available_classes[class_id]) {
for (var i in classes.available_classes[class_id][group_id]["students"]) {
var student_name = classes.available_classes[class_id][group_id]["students"][i];
other_members.push({
member_name : student_name,
member_info : classes.available_classes[class_id]["user"][student_name]["info"],
group_id : group_id
});
}
deferred.resolve(other_members);
}
else {
deferred.reject('Group ID ' + group_id + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a username, class id, and x,y coordinates movements.
// If invalid, returns an error.
// If valid, a JSON string of the given user's new updated coordinates is
// returned. The data is updated in the global datastructure.
function update_users_coordinates(username, class_id, info) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (username in classes.available_classes[class_id]["user"]) {
if(info == null || info == ""){
classes.available_classes[class_id]["user"][username]["info"] = "{}";
} else {
classes.available_classes[class_id]["user"][username]["info"] = JSON.stringify(info);
}
var data = {
info : classes.available_classes[class_id]["user"][username]["info"]
}
deferred.resolve(data);
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
//takes a username, class_id, group_id, and xml string
//if invalid, errors
//if valid stores xml string for group in user and group xml object
function update_user_xml(data) {
var deferred = Q.defer();
var rdata = {xml : '', toolbar : ''};
if (data.class_id in classes.available_classes) {
if (data.group_id in classes.available_classes[data.class_id]) {
if (data.username in classes.available_classes[data.class_id]["user"] || data.username == "admin") {
/* if(data.obj_xml != undefined){
var cur_xml_doc = $.parseXML(cur_xml);
data.obj_xml = data.obj_xml.replace(/</g,'<').replace(/>/g, '>').replace(/\\"/g, '"').replace(/\\n/g, '').replace(/\\t/g, '');
data.obj_xml = data.obj_xml.substr(data.obj_xml.indexOf("<"), data.obj_xml.lastIndexOf(">"));
$(cur_xml_doc).find('construction')[0].appendChild($.parseXML(data.obj_xml).children[0]);
var final_xml = $(cur_xml_doc).find('geogebra')[0].outerHTML;
}*/
if(data.xml != ''){
classes.available_classes[data.class_id][data.group_id]["xml"] = JSON.stringify(data.xml);
rdata.xml = classes.available_classes[data.class_id][data.group_id]["xml"];
}
if(data.toolbar_user && data.toolbar_user != ''){
if(data.toolbar_user == "admin"){
for (var i in classes.available_classes[data.class_id][data.group_id]["students"]){
var students = classes.available_classes[data.class_id][data.group_id]["students"];
if(data.properties && data.properties != 'null' && data.properties != 'undefined'){
classes.available_classes[data.class_id]["user"][students[i]]['properties'] = data.properties;
}
if(data.toolbar && data.toolbar != ''){
classes.available_classes[data.class_id]["user"][students[i]]["toolbar"] = data.toolbar;
}
}
rdata.properties = data.properties;
rdata.toolbar = data.toolbar;
} else {
if(data.properties && data.properties != 'null' && data.properties != 'undefined'){
classes.available_classes[data.class_id]["user"][data.toolbar_user]['properties'] = data.properties;
rdata.properties = classes.available_classes[data.class_id]["user"][data.toolbar_user]['properties'];
}
if(data.toolbar && data.toolbar != ''){
classes.available_classes[data.class_id]["user"][data.toolbar_user]["toolbar"] = data.toolbar;
rdata.toolbar = classes.available_classes[data.class_id]["user"][data.toolbar_user]["toolbar"];
}
rdata.user_socket = classes.available_classes[data.class_id]["user"][data.toolbar_user]["socket_id"];
}
rdata.toolbar_user = data.toolbar_user;
}
deferred.resolve(rdata);
}
else {
deferred.reject('Username ' + data.username + ' is invalid.');
}
}
else {
deferred.reject('Group ID ' + data.group_id + ' is invalid.');
}
}
else {
deferred.reject('update_user_xml: Class ID ' + data.class_id + ' is invalid.');
}
return deferred.promise;
}
//takes a username, class_id, and group_id
//if invalid, returns an error
//if valid, returns JSON of class data to user
//this is returned from the global datastructure
function get_user_xml(username, class_id, group_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (group_id in classes.available_classes[class_id]) {
if (username in classes.available_classes[class_id]["user"] || username == "admin") {
var xml = classes.available_classes[class_id][group_id]["xml"];
var toolbar = "";
var properties = null;
if(classes.available_classes[class_id]["user"][username] && classes.available_classes[class_id]["user"][username]["toolbar"]){
if(classes.available_classes[class_id]["user"][username]["properties"]){
var properties = classes.available_classes[class_id]["user"][username]["properties"];
}
var toolbar = classes.available_classes[class_id]["user"][username]["toolbar"];
}
var data = {
xml: xml,
toolbar: toolbar,
properties: properties
}
deferred.resolve(data);
}
else {
deferred.reject('Username ' + username + ' is invalid.');
}
}
else {
deferred.reject('Group ID ' + group_id + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id
// If invalid, returns an error.
// If valid, a JSON string of the class settings is returned. The data is
// retrieved from the global datastructure.
function get_settings(class_id, group_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
if (group_id in classes.available_classes[class_id]) {
var settings = classes.available_classes[class_id]['settings'];
deferred.resolve(settings);
}
else {
deferred.reject('Group ID ' + group_id + ' is invalid.');
}
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class name and group count.
// If invalid, returns an error.
// If valid, create a class of the given class name in the database and return
// a hashed string of the created class id. A new class entry is also made in
// the global datastructure.
function create_class(class_name, group_count, admin_id, group_colors){
var deferred = Q.defer();
database.create_class(class_name, group_count, admin_id, group_colors)
.then(function(class_id) {
return hash.add_hash(class_id);
}).then(function(id_hash) {
classes.available_classes[id_hash] = {};
for(var i=0; i<group_count; i++) {
classes.available_classes[id_hash][i+1] = {students:[], deleted:false};
}
classes.available_classes[id_hash]['user'] = {};
classes.available_classes[id_hash]['settings'] = {};
classes.available_classes[id_hash]['class_name'] = class_name;
deferred.resolve(id_hash);
})
.fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class id.
// If invalid, returns an error.
// If valid, retrieve class name and group count from global datastructure.
function join_class(class_id) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
var group_count = Object.keys(classes.available_classes[class_id]).length - 3;
var class_name = classes.available_classes[class_id]['class_name'];
var data = {
group_count: group_count,
class_name: class_name
}
deferred.resolve(data);
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id.
// If invalid, returns an error.
// If valid, create a group for the given class in the database and return all
// the groups in the class. A new group entry for the class is also made in the
// global datastructure.
function create_group(class_id, group_color) {
var deferred = Q.defer();
hash.find_id(class_id)
.then(function(unhashed_id) {
return database.create_group(unhashed_id, group_color);
}).then(function(group_id) {
classes.available_classes[class_id][group_id] = {students:[], deleted:false, colors:group_color};
return get_all_groups_from_class(class_id);
}).then(function(groups) {
deferred.resolve(groups);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a admin id, toolbar_name and tools.
// If invalid, returns an error.
// If valid, create a toolbar for the given class in the database and return all
// the toolbars in the class.
function create_toolbar(admin_id, toolbar_name, tools, action) {
var deferred = Q.defer();
var db_call;
if (action == 'update')
db_call = database.update_toolbar(admin_id, toolbar_name, tools);
else if (action == 'insert')
db_call = database.create_toolbar(admin_id, toolbar_name, tools);
db_call
.then(function() {
return database.get_toolbars(admin_id);
}).then(function(toolbars) {
deferred.resolve(toolbars);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a admin id, toolbar_name and tools.
// If invalid, returns an error.
// If valid, create a toolbar for the given class in the database and return all
// the toolbars in the class.
function create_xml(admin_id, xml_name, xml, toolbar, action) {
var deferred = Q.defer();
var db_call;
if (action == 'update')
db_call = database.update_xml(admin_id, xml_name, xml, toolbar);
else if (action == 'insert')
db_call = database.create_xml(admin_id, xml_name, xml, toolbar);
db_call
.then(function() {
return database.get_xmls(admin_id);
}).then(function(response) {
deferred.resolve(response);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a username and password.
// If invalid, returns an error.
// If valid return all
// creates admin.
function create_admin(username, password) {
var deferred = Q.defer();
database.create_user(username, password)
.then(function(admin) {
deferred.resolve(admin);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// adds a log
function add_log(username, class_id, group_id, log) {
var deferred = Q.defer();
database.add_log(username, class_id, group_id, log)
.then(function(admin) {
deferred.resolve(admin);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes an admin_id, password, and
// new password. Updates password
// if valid password.
function update_password(admin_id, password, new_password) {
var deferred = Q.defer();
var valid;
database.get_password(admin_id)
.then(function(db_password) {
valid = pw.verifyPassword(password, db_password);
if (valid) {
new_password = pw.makePassword(new_password, 10, 'sha256', 32);
return database.update_password(admin_id, new_password)
}
}).then(function() {
deferred.resolve(valid);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a admin id.
// If invalid, returns an error.
// If valid return all
// the toolbars in the admin.
function get_toolbars(admin_id) {
var deferred = Q.defer();
database.get_toolbars(admin_id)
.then(function(toolbars) {
deferred.resolve(toolbars);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a admin id.
// If invalid, returns an error.
// If valid return all
// the xmls in the admin.
function get_xmls(admin_id) {
var deferred = Q.defer();
database.get_xmls(admin_id)
.then(function(response) {
deferred.resolve(response);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class_id.
// If invalid, returns an error.
// If valid return all
// the users in the class.
function get_class_users(class_id) {
var deferred = Q.defer();
if(class_id in classes.available_classes) {
var class_users = [];
for(var g in classes.available_classes[class_id]){
if(parseInt(g) > 0){
var user = {};
user.group = g;
user.users = classes.available_classes[class_id][g]["students"];
class_users.push(user);
}
}
var data = {
class_users: class_users
}
deferred.resolve(data);
} else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes username and get password
function check_username(username) {
var deferred = Q.defer();
database.check_user(username)
.then(function(data_password) {
deferred.resolve(data_password);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class id and group_id.
// If invalid, returns an error.
// If valid return
// the colors of the group.
function group_color(class_id, group_id) {
var deferred = Q.defer();
hash.find_id(class_id)
.then(function(unhashed_id) {
return database.get_group_color(unhashed_id, group_id);
}).then(function(toolbars) {
deferred.resolve(toolbars);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes admin_id and get session string
function check_session(admin_id) {
var deferred = Q.defer();
database.check_session(admin_id)
.then(function(data_password) {
deferred.resolve(data_password);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes an admin id.
// If invalid, returns an error.
// If valid create session.
function create_session(admin_id, password) {
var deferred = Q.defer();
database.create_session(admin_id, password)
.then(function() {
deferred.resolve();
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes an admin id.
// If invalid, returns an error.
// If valid delete session.
function delete_session(admin_id) {
var deferred = Q.defer();
database.delete_session(admin_id)
.then(function() {
deferred.resolve();
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// If invalid, returns an error.
// If valid, deletes the toolbar for the given the admin in the database and return all
// the toolbars for the admin.
function delete_toolbar(admin_id, toolbar_name) {
var deferred = Q.defer();
database.delete_toolbar(admin_id, toolbar_name)
.then(function() {
return database.get_toolbars(admin_id);
}).then(function(toolbars) {
deferred.resolve(toolbars);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// If invalid, returns an error.
// If valid, deletes the xml for the given the admin in the database and return all
// the xmls for the admin.
function delete_xml(admin_id, xml_name) {
var deferred = Q.defer();
database.delete_xml(admin_id, xml_name)
.then(function() {
return database.get_xmls(admin_id);
}).then(function(xmls) {
deferred.resolve(xmls);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class id and group id.
// If invalid, returns an error.
// If valid, deletes the given group in the class from the database and global
// datastructure.
function delete_group(class_id, group_id) {
var deferred = Q.defer();
hash.find_id(class_id)
.then(function(unhashed_id) {
return database.delete_group(unhashed_id, group_id);
}).then(function() {
delete classes.available_classes[class_id][group_id];
}).then(function(groups) {
deferred.resolve(groups);
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class id.
// If invalid, returns an error.
// If valid, deletes the given class from the global datastructure.
function leave_class(class_id) {
var deferred = Q.defer();
// hash.remove_hash(class_id)
// .then(function() {
// deferred.resolve();
// }).fail(function(error) {
// deferred.reject(error);
// });
if (class_id in classes.available_classes) {
deferred.resolve();
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Takes a class id.
// If invalid, returns an error.
// If valid, deletes the given class from the global datastructure.
function delete_class(class_id) {
var deferred = Q.defer();
hash.find_id(class_id)
.then(function(unhashed_id) {
return database.delete_class(unhashed_id);
}).then(function() {
delete classes.available_classes[class_id];
deferred.resolve();
}).fail(function(error) {
deferred.reject(error);
});
return deferred.promise;
}
// Takes no parameters
// Retrieves the list of all classes from the database
// On failure, returns error.
function get_classes(admin_id){
var deferred = Q.defer();
database.get_classes(admin_id)
.then(function(classes){
deferred.resolve(classes);
}).fail(function(error){
deferred.reject(error);
});
return deferred.promise;
}
// Takes a class id and settings data.
// If invalid, returns an error.
// If valid, adds the settings to the given class in the global datastructure.
function save_settings(class_id, settings) {
var deferred = Q.defer();
if (class_id in classes.available_classes) {
classes.available_classes[class_id]['settings'] = settings;
deferred.resolve();
}
else {
deferred.reject('Class ID ' + class_id + ' is invalid.');
}
return deferred.promise;
}
// Sanitizes data received by socket to prevent
function sanitize_data(data) {
// Replace only works on string variables
if (typeof data === 'string' || data instanceof String) {
return data.replace(/</g, "<").replace(/>/g, ">");
}
else {
return data;
}
}
function sleep(miliseconds) {
var currentTime = new Date().getTime();
while (currentTime + miliseconds >= new Date().getTime()) {
}
}
// This function holds all event handlers for sockets.
function server_sockets(server, client){
var io = socketio.listen(server);
io.on('connection', function(socket) {
// SERVER_ERROR
// This function will notify the client when an error has occurred
// Emits server_error to the socket that triggered the error
function server_error(error, message) {
console.log(error);
var date = new Date().toJSON();
logger.info(date + "~server~server_error~~~{message: \""+ message +"\"}~0~");
socket.emit('server_error', {message: message});
};
// PING
// pinging to check for time
// Emits ping response
socket.on('ping', function(time) {
socket.emit('ping-response', time);
});
// LOGIN
// Socket joins room using class id
// Emits login_response to socket that triggered login
socket.on('login', function(username, class_id) {
username = sanitize_data(username);
class_id = sanitize_data(class_id);
add_user_to_class(username, class_id,socket.id)
.then(function() {
socket.class_id = class_id;
socket.username = username;
var response = {
username : username,
class_id : class_id
}
var date = new Date().toJSON();
logger.info(date + "~" + username + "~login~" + class_id +"~~" + JSON.stringify(response) + "~1~");
socket.emit('login_response', response);
}).fail(function(error) {
server_error(error, error);
});
}); // authenticates class ID and makes sure there is not another user
// with the same name. adds in user info to datastructure if unique.
// else displays an error message
// LOGOUT
// Socket leaves room using class id
// Emits logout_response to socket that triggered logout
socket.on('logout', function(username, class_id, disconnect) {
username = sanitize_data(username);
class_id = sanitize_data(class_id);
disconnect = sanitize_data(disconnect);
remove_user_from_class(username, class_id)
.then(function() {
socket.leave(class_id + "x");
var response = {
username : username,
class_id : class_id,
disconnect: disconnect
}
var date = new Date().toJSON();
logger.info(date + "~" + username + "~logout~" + class_id + "~~~1~");
socket.emit('logout_response', response);
socket.class_id = undefined;
socket.username = undefined;
}).fail(function(error) {
server_error(error, error);
});
});
// GROUPS_GET
// Emits groups_get_response to all sockets in class room
socket.on('groups_get', function(username, class_id) {
username = sanitize_data(username);
class_id = sanitize_data(class_id);
get_all_groups_from_class(class_id)
.then(function(groups) {
socket.join(class_id + 'x');
var response = {
username : username,
class_id : class_id,
groups : groups
}
socket.emit('groups_get_response', response);
}).fail(function(error) {
server_error(error, error);
});
}); // populates groups array with groups with the given class id and
// returns it to client.
// GROUP_JOIN
// Socket joins room using class and group ids
// Emits group_join_response to socket that triggered group_join
// Emits group_info_response to the admin socket of class
// Emits group_numbers_response to all sockets in class room
socket.on('group_join', function(username, class_id, group_id) {
username = sanitize_data(username);
class_id = sanitize_data(class_id);
group_id = sanitize_data(group_id);
add_user_to_group(username, class_id, group_id)
.then(function() {
socket.join(class_id + "x" + group_id);
// socket.leave(class_id + "x");
socket.group_id = group_id;
var info = {};
info.charges = [{name: username, x: 0, y: 0}];
var response = {
username : username,
class_id : class_id,
group_id : group_id,
other_members : [{member_name: username, member_info: JSON.stringify(info), group_id: group_id}],
status : true,
group_size : classes.available_classes[class_id][group_id]["students"].length
}
var date = new Date().toJSON();
logger.info(date + "~" + username + "~group_join~" + class_id + "~" + group_id + "~" + JSON.stringify(response)
+ "~1~" +class_id + "x");
socket.emit('group_join_response', response);
io.sockets.to(class_id + "x").emit('group_numbers_response', response);
io.sockets.to('admin-' + class_id).emit('group_info_response', response);
}).fail(function(error) {
server_error(error, error);
});
}); // adds user to the students array of given group
// GROUP_LEAVE
// Socket leaves room using class and group ids
// Emits group_leave_response to socket that triggered group_leave
// Emits group_info_response to all sockets in the class group room and
// to the admin socket of the class
// Emits group_numbers_response to all sockets in class room
socket.on('group_leave', function(username, class_id, group_id, disconnect) {
username = sanitize_data(username);
class_id = sanitize_data(class_id);
group_id = sanitize_data(group_id);
disconnect = sanitize_data(disconnect);
remove_user_from_group(username, class_id, group_id)
.then(function() {
// socket.join(class_id + "x");
socket.leave(class_id + 'x' + group_id);
var response = {
username : username,
class_id : class_id,
group_id : group_id,
status: false,
disconnect: disconnect,
group_size : classes.available_classes[class_id][group_id]["students"].length
}
var date = new Date().toJSON();
logger.info(date + "~" + username + "~group_leave~" + class_id + "~" + group_id + "~"
+ JSON.stringify(response) + "~1~" +class_id + "x" + group_id );
socket.emit('group_leave_response', response);
io.sockets.to(class_id + "x").emit('group_numbers_response', response)
io.sockets.to(class_id + "x" + group_id).emit('group_info_response', response);
io.sockets.to('admin-' + class_id).emit('group_info_response', response);
socket.group_id = undefined;
}).fail(function(error) {
server_error(error, error);
});