git ssb

1
var morph = require('morphdom')
2
3
var cached = {}
4
var start = Date.now(), _focus = Date.now()
5
function scan () {
6
  cached = {}
7
  ;[].forEach.call(document.querySelectorAll('link[data-cache]'), function (el) {
8
    cached[el.id] = +el.dataset.cache
9
  })
10
}
11
12
window.onload = function () {
13
  var start2 = Date.now()
14
  scan()
15
}
16
17
window.onfocus = function () {
18
  _focus = Date.now()
19
  check(1)
20
}
21
22
function check () {
23
  var xhr = new XMLHttpRequest()
24
  xhr.onload = function () {
25
    if(!xhr.responseText) return console.error('empty updates')
26
27
    var updates = JSON.parse(xhr.responseText)
28
    console.log(updates)
29
30
    //mark any nodes that look like they need updating.
31
    var elements = [], parents = []
32
    for(var k in updates)
33
      [].forEach.call(document.querySelectorAll('#'+k), function (el) {
34
        parents.push(el.parentNode)
35
        elements.push(el)
36
      })
37
      elements = elements.filter(function (e) {
38
        e = e.parentNode
39
        while(e)
40
          if(~parents.indexOf(e.parentNode)) return false
41
          else e = e.parentNode
42
        return true
43
      }).forEach(function (el) {
44
        el.parentNode.classList.add('invalid')
45
        update(el)
46
      })
47
  }
48
  //if the server fails, we'll just try again later.
49
  xhr.onerror = function (ev) {
50
    console.error('warning:', ev)
51
  }
52
  console.log('POST', '/check-cache')
53
  xhr.open('POST', '/check-cache')
54
  xhr.setRequestHeader('Content-Type', 'application/json')
55
  xhr.send(JSON.stringify(cached))
56
}
57
58
function update (el) {
59
  var href = el.href
60
  var xhr = new XMLHttpRequest()
61
  xhr.overrideMimeType("application/json");  
62
  xhr.onload = function () {
63
    //update html
64
    console.log('update', el.href, xhr.statusCode)
65
    if(xhr.statusCode == 200) {
66
      morph(el.parentNode, xhr.responseText)
67
68
      //rebuild list of what might need to update
69
      scan()
70
    }
71
72
  }
73
  href = href.substring(location.origin.length)
74
  xhr.open('get', '/partial'+href)
75
  xhr.send()
76
}
77
78
79