generated from keboola/template
-
Notifications
You must be signed in to change notification settings - Fork 0
/
json.go
165 lines (159 loc) · 3.83 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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
package orderedmap
import (
"bytes"
"encoding/json"
)
// MarshalJSON implements JSON encoding.
func (o OrderedMap) MarshalJSON() ([]byte, error) {
var buf bytes.Buffer
buf.WriteByte('{')
encoder := json.NewEncoder(&buf)
for i, k := range o.keys {
if i > 0 {
buf.WriteByte(',')
}
// add key
if err := encoder.Encode(k); err != nil {
return nil, err
}
buf.WriteByte(':')
// add value
if err := encoder.Encode(o.values[k]); err != nil {
return nil, err
}
}
buf.WriteByte('}')
return buf.Bytes(), nil
}
// UnmarshalJSON implements JSON decoding.
func (o *OrderedMap) UnmarshalJSON(b []byte) error {
if o.values == nil {
o.values = map[string]any{}
}
err := json.Unmarshal(b, &o.values)
if err != nil {
return err
}
dec := json.NewDecoder(bytes.NewReader(b))
if _, err = dec.Token(); err != nil { // skip '{'
return err
}
o.keys = make([]string, 0, len(o.values))
return decodeJsonOrderedMap(dec, o)
}
func decodeJsonOrderedMap(dec *json.Decoder, o *OrderedMap) error {
hasKey := make(map[string]bool, len(o.values))
for {
token, err := dec.Token()
if err != nil {
return err
}
if delim, ok := token.(json.Delim); ok && delim == '}' {
return nil
}
key := token.(string)
if hasKey[key] {
// duplicate key
for j, k := range o.keys {
if k == key {
copy(o.keys[j:], o.keys[j+1:])
break
}
}
o.keys[len(o.keys)-1] = key
} else {
hasKey[key] = true
o.keys = append(o.keys, key)
}
token, err = dec.Token()
if err != nil {
return err
}
if delim, ok := token.(json.Delim); ok {
switch delim {
case '{':
if values, ok := o.values[key].(map[string]any); ok {
newMap := &OrderedMap{
keys: make([]string, 0, len(values)),
values: values,
}
if err = decodeJsonOrderedMap(dec, newMap); err != nil {
return err
}
o.values[key] = newMap
} else if oldMap, ok := o.values[key].(*OrderedMap); ok {
newMap := &OrderedMap{
keys: make([]string, 0, len(oldMap.values)),
values: oldMap.values,
}
if err = decodeJsonOrderedMap(dec, newMap); err != nil {
return err
}
o.values[key] = newMap
} else if err = decodeJsonOrderedMap(dec, &OrderedMap{}); err != nil {
return err
}
case '[':
if values, ok := o.values[key].([]any); ok {
if err = decodeJsonSlice(dec, values); err != nil {
return err
}
} else if err = decodeJsonSlice(dec, []any{}); err != nil {
return err
}
}
}
}
}
func decodeJsonSlice(dec *json.Decoder, s []any) error {
for index := 0; ; index++ {
token, err := dec.Token()
if err != nil {
return err
}
if delim, ok := token.(json.Delim); ok {
switch delim {
case '{':
if index < len(s) {
if values, ok := s[index].(map[string]any); ok {
newMap := &OrderedMap{
keys: make([]string, 0, len(values)),
values: values,
}
if err = decodeJsonOrderedMap(dec, newMap); err != nil {
return err
}
s[index] = newMap
} else if oldMap, ok := s[index].(*OrderedMap); ok {
newMap := &OrderedMap{
keys: make([]string, 0, len(oldMap.values)),
values: oldMap.values,
}
if err = decodeJsonOrderedMap(dec, newMap); err != nil {
return err
}
s[index] = newMap
} else if err = decodeJsonOrderedMap(dec, &OrderedMap{}); err != nil {
return err
}
} else if err = decodeJsonOrderedMap(dec, &OrderedMap{}); err != nil {
return err
}
case '[':
if index < len(s) {
if values, ok := s[index].([]any); ok {
if err = decodeJsonSlice(dec, values); err != nil {
return err
}
} else if err = decodeJsonSlice(dec, []any{}); err != nil {
return err
}
} else if err = decodeJsonSlice(dec, []any{}); err != nil {
return err
}
case ']':
return nil
}
}
}
}