git ssb

1
var pull = require('pull-stream')
2
var paramap = require('pull-paramap')
3
var plugs = require('patchbay/plugs')
4
var cont = require('cont')
5
var ref = require('ssb-ref')
6
7
var sbot_log = plugs.first(exports.sbot_log = [])
8
var sbot_get = plugs.first(exports.sbot_get = [])
9
var sbot_user_feed = plugs.first(exports.sbot_user_feed = [])
10
var message_unbox = plugs.first(exports.message_unbox = [])
11
var get_id = plugs.first(exports.get_id = [])
12
var feed_summary = plugs.first(exports.feed_summary = [])
13
14
exports.screen_view = function (path) {
15
  if (path === '/notifications') {
16
    var oldest = null
17
    var id = get_id()
18
    var ids = {
19
      [id]: true
20
    }
21
22
    getFirstMessage(id, function (err, msg) {
23
      if (err) return console.error(err)
24
      if (!oldest || msg.value.timestamp < oldest) {
25
        oldest = msg.value.timestamp
26
      }
27
    })
28
29
    return feed_summary((opts) => {
30
      if (opts.old === false) {
31
        return pull(
32
          sbot_log(opts),
33
          unbox(),
34
          notifications(ids),
35
          pull.filter()
36
        )
37
      } else {
38
        return pull(
39
          sbot_log(opts),
40
          unbox(),
41
          notifications(ids),
42
          pull.filter(),
43
          pull.take(function (msg) {
44
            // abort stream after we pass the oldest messages of our feeds
45
            return !oldest || msg.value.timestamp > oldest
46
          })
47
        )
48
      }
49
    }, [], {
50
      windowSize: 100
51
    })
52
  }
53
}
54
55
function unbox () {
56
  return pull(
57
    pull.map(function (msg) {
58
      return msg.value && typeof msg.value.content === 'string'
59
        ? message_unbox(msg)
60
        : msg
61
    }),
62
    pull.filter(Boolean)
63
  )
64
}
65
66
function notifications (ourIds) {
67
  function linksToUs (link) {
68
    return link && link.link in ourIds
69
  }
70
71
  function isOurMsg (id, cb) {
72
    if (!id) return cb(null, false)
73
    if (typeof id === 'object' && typeof id.link === 'string') id = id.link
74
    if (!ref.isMsg(id)) return cb(null, false)
75
    sbot_get(id, function (err, msg) {
76
      if (err && err.name === 'NotFoundError') cb(null, false)
77
      else if (err) cb(err)
78
      else if (msg.content.type === 'issue' || msg.content.type === 'pull-request') {
79
        isOurMsg(msg.content.repo || msg.content.project, cb)
80
      } else {
81
        cb(err, msg.author in ourIds)
82
      }
83
    })
84
  }
85
86
  function isAnyOurMessage (msg, ids, cb) {
87
    cont.para(ids.map(function (id) {
88
      return function (cb) { isOurMsg(id, cb) }
89
    }))(function (err, results) {
90
      if (err) cb(err)
91
      else if (results.some(Boolean)) cb(null, msg)
92
      else cb()
93
    })
94
  }
95
96
  return paramap(function (msg, cb) {
97
    var c = msg.value && msg.value.content
98
    if (!c || typeof c !== 'object') return cb()
99
    if (msg.value.author in ourIds) return cb()
100
101
    if (c.mentions && Array.isArray(c.mentions) && c.mentions.some(linksToUs)) {
102
      return cb(null, msg)
103
    }
104
105
    if (msg.private) {
106
      return cb(null, msg)
107
    }
108
109
    switch (c.type) {
110
      case 'post':
111
        if (c.branch || c.root) {
112
          return isAnyOurMessage(msg, [].concat(c.branch, c.root), cb)
113
        } else {
114
          return cb()
115
        }
116
      case 'contact':
117
        return cb(null, c.contact in ourIds ? msg : null)
118
      case 'vote':
119
        if (c.vote && c.vote.link)
120
          return isOurMsg(c.vote.link, function (err, isOurs) {
121
            cb(err, isOurs ? msg : null)
122
          })
123
          else return cb()
124
      case 'issue':
125
      case 'pull-request':
126
        return isOurMsg(c.project || c.repo, function (err, isOurs) {
127
          cb(err, isOurs ? msg : null)
128
        })
129
      case 'issue-edit':
130
        return isAnyOurMessage(msg, [c.issue].concat(c.issues), cb)
131
      default:
132
        cb()
133
    }
134
  }, 4)
135
}
136
137
function getFirstMessage (feedId, cb) {
138
  sbot_user_feed({id: feedId, gte: 0, limit: 1})(null, cb)
139
}
140