generated from TBD54566975/tbd-project-template
-
Notifications
You must be signed in to change notification settings - Fork 7
/
encoding.go
137 lines (117 loc) · 2.6 KB
/
encoding.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
// Package encoding defines the internal encoding that FTL uses to encode and
// decode messages. It is currently JSON.
package encoding
import (
"bytes"
"encoding/base64"
"fmt"
"reflect"
"github.com/iancoleman/strcase"
)
func Marshal(v any) ([]byte, error) {
w := &bytes.Buffer{}
err := encodeValue(reflect.ValueOf(v), w)
return w.Bytes(), err
}
func encodeValue(v reflect.Value, w *bytes.Buffer) error {
switch v.Kind() {
case reflect.Struct:
return encodeStruct(v, w)
case reflect.Ptr:
if v.IsNil() {
w.WriteString("null")
return nil
}
return encodeValue(v.Elem(), w)
case reflect.Slice:
if v.Type().Elem().Kind() == reflect.Uint8 {
return encodeBytes(v, w)
}
return encodeSlice(v, w)
case reflect.Map:
return encodeMap(v, w)
case reflect.String:
return encodeString(v, w)
case reflect.Int:
return encodeInt(v, w)
case reflect.Float64:
return encodeFloat(v, w)
case reflect.Bool:
return encodeBool(v, w)
default:
panic(fmt.Sprintf("unsupported typefoo: %s", v.Type()))
}
}
func encodeStruct(v reflect.Value, w *bytes.Buffer) error {
w.WriteRune('{')
for i := 0; i < v.NumField(); i++ {
if i > 0 {
w.WriteRune(',')
}
field := v.Type().Field(i)
w.WriteString(`"` + strcase.ToLowerCamel(field.Name) + `":`)
if err := encodeValue(v.Field(i), w); err != nil {
return err
}
}
w.WriteRune('}')
return nil
}
func encodeBytes(v reflect.Value, w *bytes.Buffer) error {
w.WriteRune('"')
data := base64.StdEncoding.EncodeToString(v.Bytes())
w.WriteString(data)
w.WriteRune('"')
return nil
}
func encodeSlice(v reflect.Value, w *bytes.Buffer) error {
w.WriteRune('[')
for i := 0; i < v.Len(); i++ {
if i > 0 {
w.WriteRune(',')
}
if err := encodeValue(v.Index(i), w); err != nil {
return err
}
}
w.WriteRune(']')
return nil
}
func encodeMap(v reflect.Value, w *bytes.Buffer) error {
w.WriteRune('{')
for i, key := range v.MapKeys() {
if i > 0 {
w.WriteRune(',')
}
w.WriteRune('"')
w.WriteString(key.String())
w.WriteString(`":`)
if err := encodeValue(v.MapIndex(key), w); err != nil {
return err
}
}
w.WriteRune('}')
return nil
}
func encodeBool(v reflect.Value, w *bytes.Buffer) error {
if v.Bool() {
w.WriteString("true")
} else {
w.WriteString("false")
}
return nil
}
func encodeInt(v reflect.Value, w *bytes.Buffer) error {
fmt.Fprintf(w, "%d", v.Int())
return nil
}
func encodeFloat(v reflect.Value, w *bytes.Buffer) error {
fmt.Fprintf(w, "%g", v.Float())
return nil
}
func encodeString(v reflect.Value, w *bytes.Buffer) error {
w.WriteRune('"')
fmt.Fprintf(w, "%s", v.String())
w.WriteRune('"')
return nil
}