-
Notifications
You must be signed in to change notification settings - Fork 152
/
encode.go
128 lines (124 loc) · 2.8 KB
/
encode.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
package json
import (
"context"
"encoding/json"
"time"
"github.com/influxdata/flux/codes"
"github.com/influxdata/flux/internal/errors"
"github.com/influxdata/flux/runtime"
"github.com/influxdata/flux/semantic"
"github.com/influxdata/flux/values"
)
func init() {
runtime.RegisterPackageValue("json", "encode", values.NewFunction(
"encode",
runtime.MustLookupBuiltinType("json", "encode"),
func(ctx context.Context, args values.Object) (values.Value, error) {
v, ok := args.Get("v")
if !ok {
return nil, errors.New(codes.Invalid, "missing parameter \"v\"")
}
val, err := convertValue(v)
if err != nil {
return nil, err
}
bytes, err := json.Marshal(val)
if err != nil {
return nil, err
}
return values.NewBytes(bytes), nil
},
false,
))
}
func convertValue(v values.Value) (interface{}, error) {
if v.IsNull() {
return nil, nil
}
switch n := v.Type().Nature(); n {
case semantic.String:
return v.Str(), nil
case semantic.Bytes:
return v.Bytes(), nil
case semantic.Int:
return v.Int(), nil
case semantic.UInt:
return v.UInt(), nil
case semantic.Float:
return v.Float(), nil
case semantic.Bool:
return v.Bool(), nil
case semantic.Time:
return v.Time().Time().Format(time.RFC3339Nano), nil
case semantic.Duration:
return v.Duration(), nil
case semantic.Regexp:
return v.Regexp().String(), nil
case semantic.Array:
arr := v.Array()
a := make([]interface{}, arr.Len())
var rangeErr error
arr.Range(func(i int, v values.Value) {
if rangeErr != nil {
return // short circuit if we already hit an error
}
val, err := convertValue(v)
if err != nil {
rangeErr = err
return
}
a[i] = val
})
if rangeErr != nil {
return nil, rangeErr
}
return a, nil
case semantic.Object:
obj := v.Object()
o := make(map[string]interface{}, obj.Len())
var rangeErr error
obj.Range(func(k string, v values.Value) {
if rangeErr != nil {
return // short circuit if we already hit an error
}
val, err := convertValue(v)
if err != nil {
rangeErr = err
return
}
o[k] = val
})
if rangeErr != nil {
return nil, rangeErr
}
return o, nil
case semantic.Function:
return nil, errors.New(codes.Invalid, "cannot encode a function value")
case semantic.Dictionary:
dict := v.Dict()
d := make(map[interface{}]interface{}, dict.Len())
var rangeErr error
dict.Range(func(k, v values.Value) {
if rangeErr != nil {
return // short circuit if we already hit an error
}
key, err := convertValue(k)
if err != nil {
rangeErr = err
return
}
val, err := convertValue(v)
if err != nil {
rangeErr = err
return
}
d[key] = val
})
if rangeErr != nil {
return nil, rangeErr
}
return d, nil
default:
return nil, errors.Newf(codes.Unknown, "unknown nature %v", n)
}
}