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mixmix / ticktack



Tree: 6db39bb005b3d30740a91c3d6ba3a16619d9a48f

Files: 6db39bb005b3d30740a91c3d6ba3a16619d9a48f / unread.js

1251 bytesRaw
1var nest = require('depnest')
2
3exports.gives = nest({
4 'unread.sync.isUnread': true,
5 'unread.sync.markRead': true,
6})
7
8//load current state of unread messages.
9
10exports.create = function (api) {
11
12 var unread = null
13 if(localStorage.unread) {
14 try {
15 unread = JSON.parse(localStorage.unread)
16 } catch (err) {}
17 }
18 if(!unread)
19 unread = {timestamp: Date.now()}
20
21 unread.timestamp = unread.timestamp || Date.now()
22
23 if(!unread.filter)
24 unread.filter = {}
25
26 var timer
27 function save () {
28 if(timer) return
29
30 timer = setTimeout(function () {
31 timer = null
32 console.log('save!', Object.keys(unread.filter).length)
33 localStorage.unread = JSON.stringify(unread)
34 }, 2e3)
35 }
36
37 function isUnread(msg) {
38 //ignore messages which do not have timestamps
39
40 if(!msg.timestamp) return false
41 if(msg.timestamp < unread.timestamp) return false
42 return !unread.filter[msg.key]
43 }
44
45 function markRead(msg) {
46 if(msg && 'string' === typeof msg.key) {
47 if(isUnread(msg)) {
48 unread.filter[msg.key] = true
49 save()
50 return true
51 }
52 }
53 }
54
55 document.body.onunload = save
56
57 return nest({
58 'unread.sync.isUnread': isUnread,
59 'unread.sync.markRead': markRead
60 })
61}
62
63

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