-
-
Notifications
You must be signed in to change notification settings - Fork 114
/
json.go
105 lines (92 loc) · 2.38 KB
/
json.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
package storage
import (
"bytes"
"encoding/json"
"fmt"
"io"
)
func init() {
registerReadParser([]string{"json"}, []string{".json"}, &JSONParser{})
registerWriteParser([]string{"json"}, []string{".json"}, &JSONParser{})
}
// JSONParser is a Parser implementation to handle json files.
type JSONParser struct {
}
// FromBytes returns some data that is represented by the given bytes.
func (p *JSONParser) FromBytes(byteData []byte) (interface{}, error) {
res := make([]interface{}, 0)
decoder := json.NewDecoder(bytes.NewBuffer(byteData))
docLoop:
for {
var docData interface{}
if err := decoder.Decode(&docData); err != nil {
if err == io.EOF {
break docLoop
}
return nil, fmt.Errorf("could not unmarshal data: %w", err)
}
res = append(res, docData)
}
switch len(res) {
case 0:
return nil, nil
case 1:
return &BasicSingleDocument{Value: res[0]}, nil
default:
return &BasicMultiDocument{Values: res}, nil
}
}
// ToBytes returns a slice of bytes that represents the given value.
func (p *JSONParser) ToBytes(value interface{}, options ...ReadWriteOption) ([]byte, error) {
buffer := new(bytes.Buffer)
encoder := json.NewEncoder(buffer)
indent := " "
prettyPrint := true
colourise := false
for _, o := range options {
switch o.Key {
case OptionIndent:
if value, ok := o.Value.(string); ok {
indent = value
}
case OptionPrettyPrint:
if value, ok := o.Value.(bool); ok {
prettyPrint = value
}
case OptionColourise:
if value, ok := o.Value.(bool); ok {
colourise = value
}
case OptionEscapeHTML:
if value, ok := o.Value.(bool); ok {
encoder.SetEscapeHTML(value)
}
}
}
if !prettyPrint {
indent = ""
}
encoder.SetIndent("", indent)
switch v := value.(type) {
case SingleDocument:
if err := encoder.Encode(v.Document()); err != nil {
return nil, fmt.Errorf("could not encode single document: %w", err)
}
case MultiDocument:
for index, d := range v.Documents() {
if err := encoder.Encode(d); err != nil {
return nil, fmt.Errorf("could not encode multi document [%d]: %w", index, err)
}
}
default:
if err := encoder.Encode(v); err != nil {
return nil, fmt.Errorf("could not encode default document type: %w", err)
}
}
if colourise {
if err := ColouriseBuffer(buffer, "json"); err != nil {
return nil, fmt.Errorf("could not colourise output: %w", err)
}
}
return buffer.Bytes(), nil
}