git ssb

1
var computed = require('mutant/computed')
2
var nest = require('depnest')
3
4
exports.needs = nest({
5
  'keys.sync.id': 'first',
6
  'contact.obs': {
7
    followers: 'first',
8
    following: 'first',
9
    blockers: 'first'
10
  }
11
})
12
13
exports.gives = nest('profile.obs.contact')
14
15
exports.create = function (api) {
16
  return nest('profile.obs.contact', function (id) {
17
    var yourId = api.keys.sync.id()
18
    var yourFollowing = api.contact.obs.following(yourId)
19
    var yourFollowers = api.contact.obs.followers(yourId)
20
21
    var followers = api.contact.obs.followers(id)
22
    var following = api.contact.obs.following(id)
23
    var sync = computed([followers.sync, following.sync], (...x) => x.every(Boolean))
24
25
    var blockers = api.contact.obs.blockers(id)
26
    var youBlock = computed(blockers, function (blockers) {
27
      return blockers.includes(yourId)
28
    })
29
30
    var youFollow = computed([yourFollowing], function (yourFollowing) {
31
      return yourFollowing.includes(id)
32
    })
33
34
    var blockingFriends = computed([yourFollowers, yourFollowing, blockers], inAllSets)
35
    var mutualFriends = computed([yourFollowers, yourFollowing, followers, following], inAllSets)
36
    var outgoingVia = computed([yourFollowers, following], inAllSets)
37
    var incomingVia = computed([yourFollowing, followers], inAllSets)
38
39
    var hasOutgoing = computed([yourFollowers, following], (a, b) => {
40
      return a.some((id) => b.includes(id))
41
    })
42
    var hasIncoming = computed([followers, yourFollowing], (a, b) => {
43
      return a.some((id) => b.includes(id))
44
    })
45
46
    var isYou = computed([yourId, id], (a, b) => a === b)
47
48
    var isNotFollowingAnybody = computed(following,
49
      followingList => !followingList || followingList.length == 0
50
    );
51
52
    return {
53
      followers,
54
      following,
55
      blockers,
56
      blockingFriends,
57
      blockingFriendsCount: count(blockingFriends),
58
      mutualFriends,
59
      mutualFriendsCount: count(mutualFriends),
60
      outgoingVia,
61
      outgoingViaCount: count(outgoingVia),
62
      incomingVia,
63
      incomingViaCount: count(incomingVia),
64
      hasOutgoing,
65
      isNotFollowingAnybody,
66
      noOutgoing: not(hasOutgoing, isYou),
67
      hasIncoming,
68
      noIncoming: not(hasIncoming, isYou),
69
      yourId,
70
      yourFollowing,
71
      yourFollowers,
72
      youFollow,
73
      youBlock,
74
      isYou,
75
      notFollowing: not(youFollow, isYou),
76
      sync
77
    }
78
  })
79
}
80
81
function inAllSets (first, ...rest) {
82
  return first.filter(value => rest.every((collection) => collection.includes(value)))
83
}
84
85
function not (obs, isFalse) {
86
  return computed([obs, isFalse], (x, isFalse) => isFalse ? false : !x)
87
}
88
89
function count (obs) {
90
  return computed(obs, (x) => x.length)
91
}
92