git ssb

1
var pull = require('pull-stream')
2
var paramap = require('pull-paramap')
3
var asyncMemo = require('asyncmemo')
4
var issueSchemas = require('./lib/schemas')
5
6
function Cache(fn, ssb) {
7
  return asyncMemo(fn)
8
  return function (key, cb) { ac.get(key, cb) }
9
}
10
11
function isUpdateValid(issue, msg) {
12
  return msg.value.author == issue.author
13
      && msg.value.author == issue.projectAuthor
14
}
15
16
exports.name = 'issues'
17
18
exports.manifest = {
19
  get: 'async',
20
  createFeedStream: 'source',
21
  new: 'async',
22
  edit: 'async',
23
  close: 'async',
24
  reopen: 'async'
25
}
26
27
exports.schemas = issueSchemas
28
29
exports.init = function (ssb) {
30
31
  var ssbGet = asyncMemo(ssb.get)
32
33
  var getIssue = asyncMemo(function (id, cb) {
34
    var issue = {}
35
    var issueMsg
36
37
    if (id && id.value && id.key) {
38
      var msg = id
39
      id = id.key
40
      gotIssueMsg(null, msg)
41
    } else {
42
      ssbGet(id, gotIssueMsg)
43
    }
44
45
    function gotIssueMsg(err, msg) {
46
      if (err) return cb(err)
47
      issueMsg = msg
48
      issue.id = msg.key
49
      issue.author = msg.value.author
50
      var c = msg.value.content
51
      issue.project = c.project
52
      issue.text = c.text
53
      issue.created_at = issue.updated_at = msg.value.timestamp
54
      if (c.project)
55
        ssbGet(c.project, gotProjectMsg)
56
      else
57
        getLinks()
58
    }
59
60
    function gotProjectMsg(err, msg) {
61
      if (err) return cb(err)
62
      issue.projectAuthor = msg.author
63
      getLinks()
64
    }
65
66
    function getLinks() {
67
      var now = Date.now()
68
      // compute the result from the past data
69
      pull(
70
        ssb.links({dest: id, lt: now, reverse: true, values: true}),
71
        pull.drain(onOldMsg, onOldEnd)
72
      )
73
      // keep the results up-to-date in the future
74
      pull(
75
        ssb.links({dest: id, gte: now, values: true, live: true}),
76
        pull.drain(onNewMsg, onNewEnd)
77
      )
78
    }
79
80
    function onOldMsg(msg) {
81
      if (!isUpdateValid(issue, msg))
82
        return
83
      var c = msg.value.content
84
      if (c.open != null && issue.open == null)
85
        issue.open = c.open
86
      if (c.title != null && issue.title == null)
87
        issue.title = c.title
88
      if (msg.value.timestamp > issue.updated_at)
89
        issue.updated_at = msg.value.timestamp
90
      checkReady()
91
    }
92
93
    function onNewMsg(msg) {
94
      if (!isUpdateValid(issue, msg))
95
        return
96
      var c = msg.value.content
97
      if (c.open != null)
98
        issue.open = c.open
99
      if (c.title != null)
100
        issue.title = c.title
101
      if (msg.value.timestamp > issue.updated_at)
102
        issue.updated_at = msg.value.timestamp
103
    }
104
105
    function checkReady() {
106
      // call back once all the issue properties are set
107
      if (issue.open != null && issue.title != null) {
108
        var _cb = cb
109
        delete cb
110
        _cb(null, issue)
111
      }
112
    }
113
114
    function onOldEnd(err) {
115
      if (err) {
116
        if (cb) cb(err)
117
        else console.error(err)
118
        return
119
      }
120
      // process the root message last
121
      onOldMsg(issueMsg)
122
      // if callback hasn't been called yet, the issue is missing a field
123
      if (cb) {
124
        if (issue.open == null)
125
          issue.open = true
126
        if (issue.title == null)
127
          issue.title = issue.id
128
        checkReady()
129
      }
130
    }
131
132
    function onNewEnd(err) {
133
      if (err) {
134
        if (cb) cb(err)
135
        else console.error(err)
136
      }
137
    }
138
  })
139
140
  function createFeedStream(opts) {
141
    opts.type = 'issue'
142
    delete opts.limit
143
    return pull(
144
      // TODO: use links2 for this
145
      ssb.messagesByType(opts),
146
      pull.filter(function (msg) {
147
        return (!opts.project || opts.project == msg.value.content.project)
148
          && (!opts.author || opts.author == msg.value.author)
149
      }),
150
      paramap(getIssue, 8)
151
    )
152
  }
153
154
  function editIssue(id, opts, cb) {
155
    ssb.publish(issueSchemas.edit(id, opts), cb)
156
  }
157
158
  function closeIssue(id, cb) {
159
    ssb.publish(issueSchemas.close(id), cb)
160
  }
161
162
  function reopenIssue(id, cb) {
163
    ssb.publish(issueSchemas.reopen(id), cb)
164
  }
165
166
  function newIssue(opts, cb) {
167
    var msg = issueSchemas.new(opts.project, opts.title, opts.text)
168
    ssb.publish(msg, function (err, msg) {
169
      if (err) return cb(err)
170
      getIssue(msg, cb)
171
    })
172
  }
173
174
  return {
175
    get: getIssue,
176
    createFeedStream: createFeedStream,
177
    new: newIssue,
178
    edit: editIssue,
179
    close: closeIssue,
180
    reopen: reopenIssue
181
  }
182
}
183