forked from
tokono.ma/diffuse
A music player that connects to your cloud/distributed storage.
1module Tracks.Collection exposing (add, arrange, harvest, identifiedTracksChanged, identify, map, replace, tracksChanged)
2
3import Tracks exposing (IdentifiedTrack, Parcel, Track, emptyCollection)
4import Tracks.Collection.Internal as Internal
5
6
7
8-- 🔱
9
10
11identify : Parcel -> Parcel
12identify =
13 Internal.identify >> Internal.arrange >> Internal.harvest
14
15
16arrange : Parcel -> Parcel
17arrange =
18 Internal.arrange >> Internal.harvest
19
20
21harvest : Parcel -> Parcel
22harvest =
23 Internal.harvest
24
25
26map : (List IdentifiedTrack -> List IdentifiedTrack) -> Parcel -> Parcel
27map fn ( model, collection ) =
28 ( model
29 , { collection
30 | identified = fn collection.identified
31 , arranged = fn collection.arranged
32 , harvested = fn collection.harvested
33 }
34 )
35
36
37
38-- ⚗️
39
40
41add : List Track -> Parcel -> Parcel
42add tracks ( deps, { untouched } ) =
43 identify
44 ( deps
45 , { emptyCollection | untouched = untouched ++ tracks }
46 )
47
48
49replace : List Track -> Parcel -> Parcel
50replace tracks ( deps, { untouched } ) =
51 identify
52 ( deps
53 , { emptyCollection | untouched = tracks }
54 )
55
56
57
58-- ⚗️
59
60
61tracksChanged : List Track -> List Track -> Bool
62tracksChanged listA listB =
63 case ( listA, listB ) of
64 ( [], [] ) ->
65 False
66
67 ( a :: restA, b :: restB ) ->
68 if a.id /= b.id then
69 True
70
71 else
72 tracksChanged restA restB
73
74 _ ->
75 True
76
77
78identifiedTracksChanged : List IdentifiedTrack -> List IdentifiedTrack -> Bool
79identifiedTracksChanged listA listB =
80 case ( listA, listB ) of
81 ( [], [] ) ->
82 False
83
84 ( ( _, a ) :: restA, ( _, b ) :: restB ) ->
85 if a.id /= b.id then
86 True
87
88 else
89 identifiedTracksChanged restA restB
90
91 _ ->
92 True