git ssb

1
var pull = require('pull-stream')
2
var paramap = require('pull-paramap')
3
var Highlight = require('highlight.js')
4
var u = exports
5
6
u.imgMimes = {
7
  png: 'image/png',
8
  jpeg: 'image/jpeg',
9
  jpg: 'image/jpeg',
10
  gif: 'image/gif',
11
  tif: 'image/tiff',
12
  svg: 'image/svg+xml',
13
  bmp: 'image/bmp'
14
}
15
16
u.getExtension = function(filename) {
17
  return (/\.([^.]+)$/.exec(filename) || [,filename])[1]
18
}
19
20
u.readNext = function (fn) {
21
  var next
22
  return function (end, cb) {
23
    if (next) return next(end, cb)
24
    fn(function (err, _next) {
25
      if (err) return cb(err)
26
      next = _next
27
      next(null, cb)
28
    })
29
  }
30
}
31
32
u.readOnce = function (fn) {
33
  var ended
34
  return function (end, cb) {
35
    fn(function (err, data) {
36
      if (err || ended) return cb(err || ended)
37
      ended = true
38
      cb(null, data)
39
    })
40
  }
41
}
42
43
u.sourceMap = function sourceMap (source, fn) {
44
  return pull(
45
    source,
46
    pull.filter(Boolean),
47
    pull.map(fn),
48
    pull.flatten()
49
  )
50
}
51
52
u.escape = function (str) {
53
  return String(str)
54
    .replace(/&/g, '&')
55
    .replace(/</g, '&lt;')
56
    .replace(/>/g, '&gt;')
57
    .replace(/"/g, '&quot;')
58
}
59
60
u.encodeLink = function (url) {
61
  if (!Array.isArray(url)) url = [url]
62
  return '/' + url.map(encodeURIComponent).join('/')
63
}
64
65
u.link = function (parts, text, raw, props) {
66
  if (text == null) text = parts[parts.length-1]
67
  if (!raw) text = u.escape(text)
68
  return '<a href="' + u.encodeLink(parts) + '"' +
69
    (props ? ' ' + props : '') +
70
    '>' + text + '</a>'
71
}
72
73
u.timestamp = function (time, req) {
74
  time = Number(time)
75
  var d = new Date(time)
76
  return '<span title="' + time + '">' +
77
    d.toLocaleString(req._locale) + '</span>'
78
}
79
80
u.nav = function (links, page, after) {
81
  return pull.once(['<nav>'].concat(
82
    links.map(function (link) {
83
      var href = typeof link[0] == 'string' ? link[0] : u.encodeLink(link[0])
84
      var props = link[2] == page ? ' class="active"' : ''
85
      return '<a href="' + href + '"' + props + '>' + link[1] + '</a>'
86
    }), after || '', '</nav>').join('')
87
  )
88
}
89
90
u.hiddenInputs = function (values) {
91
  return Object.keys(values).map(function (key) {
92
    return '<input type="hidden"' +
93
      ' name="' + u.escape(key) + '"' +
94
      ' value="' + u.escape(values[key]) + '"/>'
95
  }).join('')
96
}
97
98
u.highlight = function(code, lang) {
99
  if (code.length > 100000) return u.escape(code)
100
  try {
101
    return lang
102
      ? Highlight.highlight(lang, code).value
103
      : Highlight.highlightAuto(code).value
104
  } catch(e) {
105
    if (/^Unknown language/.test(e.message))
106
      return u.escape(code)
107
    throw e
108
  }
109
}
110
111
u.pre = function (text) {
112
  return '<pre>' + u.escape(text) + '</pre>'
113
}
114
115
u.json = function (obj) {
116
  return u.linkify(u.pre(JSON.stringify(obj, null, 2)))
117
}
118
119
u.linkify = function (text) {
120
  // regex is from ssb-ref
121
  return text.replace(/(@|%|&|&amp;)[A-Za-z0-9\/+]{43}=\.[\w\d]+/g, function (str) {
122
    return '<a href="/' + encodeURIComponent(str) + '">' + str + '</a>'
123
  })
124
}
125
126
u.readObjectString = function (obj, cb) {
127
  pull(obj.read, pull.collect(function (err, bufs) {
128
    if (err) return cb(err)
129
    cb(null, Buffer.concat(bufs, obj.length).toString('utf8'))
130
  }))
131
}
132
133
u.pullReverse = function () {
134
  return function (read) {
135
    return u.readNext(function (cb) {
136
      pull(read, pull.collect(function (err, items) {
137
        cb(err, items && pull.values(items.reverse()))
138
      }))
139
    })
140
  }
141
}
142
143
function compareMsgs(a, b) {
144
  return (a.value.timestamp - b.value.timestamp) || (a.key - b.key)
145
}
146
147
u.pullSort = function (comparator, descending) {
148
  return function (read) {
149
    return u.readNext(function (cb) {
150
      pull(read, pull.collect(function (err, items) {
151
        if (err) return cb(err)
152
        items.sort(comparator)
153
        if (descending) items.reverse()
154
        cb(null, pull.values(items))
155
      }))
156
    })
157
  }
158
}
159
160
u.sortMsgs = function (descending) {
161
  return u.pullSort(compareMsgs, descending)
162
}
163
164
u.truncate = function (str, len) {
165
  str = String(str)
166
  return str.length < len ? str : str.substr(0, len) + '…'
167
}
168
169
u.messageTitle = function (msg) {
170
  var c = msg.value.content
171
  return u.truncate(c.title || c.text || msg.key, 40)
172
}
173
174
u.ifModifiedSince = function (req, lastMod) {
175
  var ifModSince = req.headers['if-modified-since']
176
  if (!ifModSince) return false
177
  var d = new Date(ifModSince)
178
  return d && Math.floor(d/1000) >= Math.floor(lastMod/1000)
179
}
180
181
u.decryptMessages = function (sbot) {
182
  return paramap(function (msg, cb) {
183
    var c = msg && msg.value && msg.value.content
184
    if (c && typeof c === 'string' && c.slice(-4) === '.box') {
185
      sbot.private.unbox(msg.value.content, function (err, content) {
186
        if (err) return cb(null, msg) // leave message encrypted
187
        var msg1 = {}
188
        for (var k in msg) msg1[k] = msg[k]
189
        msg1.value = {}
190
        for (var j in msg.value) msg1.value[j] = msg.value[j]
191
        msg1.value.private = true
192
        msg1.value.content = content
193
        if (!content.recps) {
194
          sbot.whoami(function (err, feed) {
195
            if (err) return cb(err)
196
            content.recps = [msg1.value.author]
197
            if (feed.id !== msg1.value.author) content.recps.push(feed.id)
198
            cb(null, msg1)
199
          })
200
        } else cb(null, msg1)
201
      })
202
    } else cb(null, msg)
203
  }, 4)
204
}
205