git ssb

1
const cbor = require('borc')
2
3
const TAGS = {
4
  id: 41,
5
  link: 42,
6
  func: 43,
7
  mod: 44
8
}
9
10
const DEFAULTS = {
11
  elem: [],
12
  buf: Buffer.from([]),
13
  id: new cbor.Tagged(TAGS.id, 0),
14
  mod: new cbor.Tagged(TAGS.mod, [{}, new cbor.Tagged(TAGS.id, 0)]),
15
  link: {'/': null},
16
  func: new cbor.Tagged(TAGS.func, 0)
17
}
18
19
const decoder = new cbor.Decoder({
20
  tags: {
21
    [TAGS.id]: val => new ID(val),
22
    [TAGS.func]: val => new FunctionRef(...val),
23
    [TAGS.mod]: val => new ModuleRef(...val),
24
  }
25
})
26
27
class Serializable {
28
  serialize () {
29
    const encoder = new cbor.Encoder()
30
    this.encodeCBOR(encoder)
31
    return encoder.finalize()
32
  }
33
34
  static deserialize (serialized) {
35
    return decoder.decodeFirst(serialized)
36
  }
37
}
38
39
class FunctionRef extends Serializable {
40
  constructor (privateFunc, identifier, params, id, gas=0) {
41
    super()
42
    this.private = privateFunc
43
    this.identifier = identifier
44
    if (!(id instanceof ID))
45
      id = new ID(id)
46
    this.destId = id
47
    this.params = params
48
    this.gas = gas
49
  }
50
51
  encodeCBOR (gen) {
52
    return gen.write(new cbor.Tagged(TAGS.func, [
53
      this.private,
54
      this.identifier,
55
      this.params,
56
      this.destId
57
    ]))
58
  }
59
60
  set container (container) {
61
    this._container = container
62
  }
63
}
64
65
class ModuleRef extends Serializable {
66
  constructor (ex, id) {
67
    super()
68
    this.exports = ex
69
    this.id = id
70
  }
71
72
  getFuncRef (name) {
73
    return new FunctionRef(false, name, this.exports[name], this.id)
74
  }
75
76
  encodeCBOR (gen) {
77
    return gen.write(new cbor.Tagged(TAGS.mod, [this.exports, this.id]))
78
  }
79
80
  static fromMetaJSON (json, id) {
81
    const exports = {}
82
    for (const ex in json.exports) {
83
      const type = json.types[json.indexes[json.exports[ex].toString()]].params
84
      exports[ex] = type
85
    }
86
    return new ModuleRef(exports, id)
87
  }
88
}
89
90
class ID extends Serializable {
91
  constructor (id) {
92
    super()
93
    this.id = id
94
  }
95
96
  encodeCBOR (gen) {
97
    return gen.write(new cbor.Tagged(TAGS.id, this.id))
98
  }
99
}
100
101
module.exports = {
102
  ID,
103
  FunctionRef,
104
  ModuleRef,
105
  DEFAULTS
106
}
107