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
|
port module State exposing (..)
import Array exposing (Array)
import Browser
import Browser.Navigation as Nav
import Date
import DatePicker
import Http
import Json.Decode as JD
import Json.Decode.Extra as JDE
import Json.Encode as JE
import Process
import RemoteData exposing (WebData)
import Shared
import Task
import Time
import Url
import Url.Builder as UrlBuilder
import Url.Parser exposing ((</>), Parser, int, map, oneOf, s, string)
import Utils
--------------------------------------------------------------------------------
-- Types
--------------------------------------------------------------------------------
type Msg
= DoNothing
| UpdateUsername String
| UpdateEmail String
| UpdatePassword String
| UpdateRole String
| UpdateAdminTab AdminTab
| UpdateTripDestination String
| UpdateTripStartDate DatePicker.Msg
| UpdateTripEndDate DatePicker.Msg
| UpdateTripComment String
| ClearErrors
| ToggleLoginForm
| PrintPage
-- SPA
| LinkClicked Browser.UrlRequest
| UrlChanged Url.Url
-- Outbound network
| AttemptGetAccounts
| AttemptGetTrips
| AttemptSignUp
| AttemptLogin
| AttemptLogout
| AttemptDeleteAccount String
| AttemptCreateTrip Date.Date Date.Date
| AttemptDeleteTrip Trip
-- Inbound network
| GotAccounts (WebData (List Account))
| GotTrips (WebData (List Trip))
| GotSignUp (Result Http.Error Session)
| GotLogin (Result Http.Error Session)
| GotLogout (Result Http.Error String)
| GotDeleteAccount (Result Http.Error String)
| GotCreateTrip (Result Http.Error ())
| GotDeleteTrip (Result Http.Error ())
type Route
= Login
| UserHome
| ManagerHome
| AdminHome
type Role
= User
| Manager
| Admin
type alias Account =
{ username : String
, role : Role
}
type alias Session =
{ role : Role
, username : String
}
type alias Review =
{ rowid : Int
, content : String
, rating : Int
, user : String
, dateOfVisit : String
}
type AdminTab
= Accounts
| Trips
type LoginTab
= LoginForm
| SignUpForm
type alias Trip =
{ username : String
, destination : String
, startDate : Date.Date
, endDate : Date.Date
, comment : String
}
type alias Model =
{ route : Maybe Route
, url : Url.Url
, key : Nav.Key
, session : Maybe Session
, username : String
, email : String
, password : String
, role : Maybe Role
, accounts : WebData (List Account)
, startDatePicker : DatePicker.DatePicker
, endDatePicker : DatePicker.DatePicker
, tripDestination : String
, tripStartDate : Maybe Date.Date
, tripEndDate : Maybe Date.Date
, tripComment : String
, trips : WebData (List Trip)
, adminTab : AdminTab
, loginTab : LoginTab
, loginError : Maybe Http.Error
, logoutError : Maybe Http.Error
, signUpError : Maybe Http.Error
, deleteUserError : Maybe Http.Error
, createTripError : Maybe Http.Error
, deleteTripError : Maybe Http.Error
}
allErrors : Model -> List ( Maybe Http.Error, String )
allErrors model =
[ ( model.loginError, "Error attempting to authenticate" )
, ( model.logoutError, "Error attempting to log out" )
, ( model.signUpError, "Error attempting to create your account" )
, ( model.deleteUserError, "Error attempting to delete a user" )
, ( model.createTripError, "Error attempting to create a trip" )
]
--------------------------------------------------------------------------------
-- Functions
--------------------------------------------------------------------------------
roleToString : Role -> String
roleToString role =
case role of
User ->
"user"
Manager ->
"manager"
Admin ->
"admin"
endpoint : List String -> List UrlBuilder.QueryParameter -> String
endpoint =
UrlBuilder.crossOrigin Shared.serverOrigin
decodeRole : JD.Decoder Role
decodeRole =
let
toRole : String -> JD.Decoder Role
toRole s =
case s of
"user" ->
JD.succeed User
"manager" ->
JD.succeed Manager
"admin" ->
JD.succeed Admin
x ->
JD.fail ("Invalid input: " ++ x)
in
JD.string |> JD.andThen toRole
decodeSession : JD.Decoder Session
decodeSession =
JD.map2
Session
(JD.field "role" decodeRole)
(JD.field "username" JD.string)
encodeLoginRequest : String -> String -> JE.Value
encodeLoginRequest username password =
JE.object
[ ( "username", JE.string username )
, ( "password", JE.string password )
]
login : String -> String -> Cmd Msg
login username password =
Utils.postWithCredentials
{ url = endpoint [ "login" ] []
, body = Http.jsonBody (encodeLoginRequest username password)
, expect = Http.expectJson GotLogin decodeSession
}
logout : Cmd Msg
logout =
Utils.getWithCredentials
{ url = endpoint [ "logout" ] []
, expect = Http.expectString GotLogout
}
signUp :
{ username : String
, email : String
, password : String
}
-> Cmd Msg
signUp { username, email, password } =
Utils.postWithCredentials
{ url = endpoint [ "accounts" ] []
, body =
Http.jsonBody
(JE.object
[ ( "username", JE.string username )
, ( "email", JE.string username )
, ( "password", JE.string password )
, ( "role", JE.string "user" )
]
)
, expect = Http.expectJson GotSignUp decodeSession
}
createTrip :
{ username : String
, destination : String
, startDate : Date.Date
, endDate : Date.Date
, comment : String
}
-> Cmd Msg
createTrip { username, destination, startDate, endDate, comment } =
Utils.postWithCredentials
{ url = endpoint [ "trips" ] []
, body =
Http.jsonBody
(JE.object
[ ( "username", JE.string username )
, ( "destination", JE.string destination )
, ( "startDate", encodeDate startDate )
, ( "endDate", encodeDate endDate )
, ( "comment", JE.string comment )
]
)
, expect = Http.expectWhatever GotCreateTrip
}
deleteTrip :
{ username : String
, destination : String
, startDate : Date.Date
}
-> Cmd Msg
deleteTrip { username, destination, startDate } =
Utils.deleteWithCredentials
{ url = endpoint [ "trips" ] []
, body =
Http.jsonBody
(JE.object
[ ( "username", JE.string username )
, ( "destination", JE.string destination )
, ( "startDate", encodeDate startDate )
]
)
, expect = Http.expectWhatever GotDeleteTrip
}
deleteAccount : String -> Cmd Msg
deleteAccount username =
Utils.deleteWithCredentials
{ url = endpoint [ "accounts" ] [ UrlBuilder.string "username" username ]
, body = Http.emptyBody
, expect = Http.expectString GotDeleteAccount
}
decodeReview : JD.Decoder Review
decodeReview =
JD.map5
Review
(JD.field "rowid" JD.int)
(JD.field "content" JD.string)
(JD.field "rating" JD.int)
(JD.field "user" JD.string)
(JD.field "timestamp" JD.string)
encodeDate : Date.Date -> JE.Value
encodeDate date =
date |> Date.toIsoString |> JE.string
decodeDate : JD.Decoder Date.Date
decodeDate =
JD.string |> JD.andThen (Date.fromIsoString >> JDE.fromResult)
fetchTrips : Cmd Msg
fetchTrips =
Utils.getWithCredentials
{ url = endpoint [ "trips" ] []
, expect =
Http.expectJson
(RemoteData.fromResult >> GotTrips)
(JD.list
(JD.map5
Trip
(JD.field "username" JD.string)
(JD.field "destination" JD.string)
(JD.field "startDate" decodeDate)
(JD.field "endDate" decodeDate)
(JD.field "comment" JD.string)
)
)
}
fetchAccounts : Cmd Msg
fetchAccounts =
Utils.getWithCredentials
{ url = endpoint [ "accounts" ] []
, expect =
Http.expectJson
(RemoteData.fromResult >> GotAccounts)
(JD.list
(JD.map2
Account
(JD.field "username" JD.string)
(JD.field "role" decodeRole)
)
)
}
sleepAndClearErrors : Cmd Msg
sleepAndClearErrors =
Process.sleep 4000
|> Task.perform (\_ -> ClearErrors)
isAuthorized : Role -> Route -> Bool
isAuthorized role route =
case ( role, route ) of
( User, _ ) ->
True
( Manager, _ ) ->
True
( Admin, _ ) ->
True
homeRouteForRole : Role -> String
homeRouteForRole role =
case role of
User ->
"/user"
Manager ->
"/manager"
Admin ->
"/admin"
routeParser : Parser (Route -> a) a
routeParser =
oneOf
[ map Login (s "topic")
, map UserHome (s "user")
, map ManagerHome (s "manager")
, map AdminHome (s "admin")
]
{-| Set init to `prod` when going live.
-}
prod : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
prod _ url key =
let
( startDatePicker, startDatePickerCmd ) =
DatePicker.init
( endDatePicker, endDatePickerCmd ) =
DatePicker.init
in
( { route = Nothing
, url = url
, key = key
, session = Nothing
, username = ""
, email = ""
, password = ""
, role = Nothing
, accounts = RemoteData.NotAsked
, tripDestination = ""
, tripStartDate = Nothing
, tripEndDate = Nothing
, tripComment = ""
, trips = RemoteData.NotAsked
, startDatePicker = startDatePicker
, endDatePicker = endDatePicker
, adminTab = Accounts
, loginTab = LoginForm
, loginError = Nothing
, logoutError = Nothing
, signUpError = Nothing
, deleteUserError = Nothing
, createTripError = Nothing
, deleteTripError = Nothing
}
, Cmd.batch
[ Cmd.map UpdateTripStartDate startDatePickerCmd
, Cmd.map UpdateTripEndDate endDatePickerCmd
]
)
{-| When working on a feature for the UserHome, use this.
-}
userHome : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
userHome flags url key =
let
( model, cmd ) =
prod flags url key
in
( { model
| route = Just UserHome
, session = Just { username = "mimi", role = User }
, trips =
RemoteData.Success
[ { username = "mimi"
, destination = "Barcelona"
, startDate = Date.fromCalendarDate 2020 Time.Sep 25
, endDate = Date.fromCalendarDate 2020 Time.Oct 5
, comment = "Blah"
}
, { username = "mimi"
, destination = "Paris"
, startDate = Date.fromCalendarDate 2021 Time.Jan 1
, endDate = Date.fromCalendarDate 2021 Time.Feb 1
, comment = "Bon voyage!"
}
]
}
, cmd
)
managerHome : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
managerHome flags url key =
let
( model, cmd ) =
prod flags url key
in
( { model
| route = Just ManagerHome
, session = Just { username = "bill", role = Manager }
}
, cmd
)
adminHome : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
adminHome flags url key =
let
( model, cmd ) =
prod flags url key
in
( { model
| route = Just AdminHome
, session = Just { username = "wpcarro", role = Admin }
}
, cmd
)
port printPage : () -> Cmd msg
{-| The initial state for the application.
-}
init : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
init flags url key =
adminHome flags url key
{-| Now that we have state, we need a function to change the state.
-}
update : Msg -> Model -> ( Model, Cmd Msg )
update msg model =
case msg of
DoNothing ->
( model, Cmd.none )
UpdateUsername x ->
( { model | username = x }, Cmd.none )
UpdatePassword x ->
( { model | password = x }, Cmd.none )
UpdateEmail x ->
( { model | email = x }, Cmd.none )
UpdateAdminTab x ->
( { model | adminTab = x }, Cmd.none )
UpdateRole x ->
let
maybeRole =
case x of
"user" ->
Just User
"manager" ->
Just Manager
"admin" ->
Just Admin
_ ->
Nothing
in
( { model | role = maybeRole }, Cmd.none )
UpdateTripDestination x ->
( { model | tripDestination = x }, Cmd.none )
UpdateTripStartDate dpMsg ->
let
( newDatePicker, dateEvent ) =
DatePicker.update DatePicker.defaultSettings dpMsg model.startDatePicker
newDate =
case dateEvent of
DatePicker.Picked changedDate ->
Just changedDate
_ ->
model.tripStartDate
in
( { model
| tripStartDate = newDate
, startDatePicker = newDatePicker
}
, Cmd.none
)
UpdateTripEndDate dpMsg ->
let
( newDatePicker, dateEvent ) =
DatePicker.update DatePicker.defaultSettings dpMsg model.endDatePicker
newDate =
case dateEvent of
DatePicker.Picked changedDate ->
Just changedDate
_ ->
model.tripEndDate
in
( { model
| tripEndDate = newDate
, endDatePicker = newDatePicker
}
, Cmd.none
)
UpdateTripComment x ->
( { model | tripComment = x }, Cmd.none )
ClearErrors ->
( { model
| loginError = Nothing
, logoutError = Nothing
, signUpError = Nothing
, deleteUserError = Nothing
, createTripError = Nothing
}
, Cmd.none
)
ToggleLoginForm ->
( { model
| loginTab =
case model.loginTab of
LoginForm ->
SignUpForm
SignUpForm ->
LoginForm
}
, Cmd.none
)
PrintPage ->
( model, printPage () )
LinkClicked urlRequest ->
case urlRequest of
Browser.Internal url ->
( model, Nav.pushUrl model.key (Url.toString url) )
Browser.External href ->
( model, Nav.load href )
UrlChanged url ->
let
route =
Url.Parser.parse routeParser url
in
case route of
Just UserHome ->
( { model
| url = url
, route = route
, trips = RemoteData.Loading
}
, fetchTrips
)
Just ManagerHome ->
( { model
| url = url
, route = route
, accounts = RemoteData.Loading
}
, fetchAccounts
)
Just AdminHome ->
( { model
| url = url
, route = route
, accounts = RemoteData.Loading
, trips = RemoteData.Loading
}
, Cmd.batch
[ fetchAccounts
, fetchTrips
]
)
_ ->
( { model
| url = url
, route = route
}
, Cmd.none
)
-- GET /accounts
AttemptGetAccounts ->
( { model | accounts = RemoteData.Loading }, fetchAccounts )
GotAccounts xs ->
( { model | accounts = xs }, Cmd.none )
-- DELETE /accounts
AttemptDeleteAccount username ->
( model, deleteAccount username )
GotDeleteAccount result ->
case result of
Ok _ ->
( model, fetchAccounts )
Err e ->
( { model | deleteUserError = Just e }
, sleepAndClearErrors
)
-- POST /trips
AttemptCreateTrip startDate endDate ->
( model
, case model.session of
Nothing ->
Cmd.none
Just session ->
createTrip
{ username = session.username
, destination = model.tripDestination
, startDate = startDate
, endDate = endDate
, comment = model.tripComment
}
)
GotCreateTrip result ->
case result of
Ok _ ->
( { model
| tripDestination = ""
, tripStartDate = Nothing
, tripEndDate = Nothing
, tripComment = ""
}
, fetchTrips
)
Err e ->
( { model
| createTripError = Just e
, tripDestination = ""
, tripStartDate = Nothing
, tripEndDate = Nothing
, tripComment = ""
}
, sleepAndClearErrors
)
-- DELETE /trips
AttemptDeleteTrip trip ->
( model
, deleteTrip
{ username = trip.username
, destination = trip.destination
, startDate = trip.startDate
}
)
GotDeleteTrip result ->
case result of
Ok _ ->
( model, fetchTrips )
Err e ->
( { model | deleteTripError = Just e }
, sleepAndClearErrors
)
-- POST /accounts
AttemptSignUp ->
( model
, signUp
{ username = model.username
, email = model.email
, password = model.password
}
)
GotSignUp result ->
case result of
Ok session ->
( { model | session = Just session }
, Nav.pushUrl model.key (homeRouteForRole session.role)
)
Err x ->
( { model | signUpError = Just x }
, sleepAndClearErrors
)
-- GET /trips
AttemptGetTrips ->
( { model | trips = RemoteData.Loading }, fetchTrips )
GotTrips xs ->
( { model | trips = xs }, Cmd.none )
-- POST /login
AttemptLogin ->
( model, login model.username model.password )
GotLogin result ->
case result of
Ok session ->
( { model | session = Just session }
, Nav.pushUrl model.key (homeRouteForRole session.role)
)
Err x ->
( { model | loginError = Just x }
, sleepAndClearErrors
)
-- GET /logout
AttemptLogout ->
( model, logout )
GotLogout result ->
case result of
Ok _ ->
( { model | session = Nothing }
, Nav.pushUrl model.key "/login"
)
Err e ->
( { model | logoutError = Just e }
, sleepAndClearErrors
)
|