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serialize.go
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serialize.go
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package jstra
import (
"bytes"
"errors"
"fmt"
"reflect"
"strings"
)
type jstraSerialize struct {
json strings.Builder
}
func Serialize(str interface{}) (string, error) {
js := newJstraSerialize()
return js.serializer(str)
}
func newJstraSerialize() *jstraSerialize {
return &jstraSerialize{json: strings.Builder{}}
}
func (js *jstraSerialize) serializer(str interface{}) (string, error) {
t := reflect.TypeOf(str)
v := reflect.ValueOf(str)
if t.Kind() == reflect.Slice {
js.arrays2Json(v.Interface())
} else if t.Kind() == reflect.Ptr {
p := reflect.Indirect(v)
js.serializer(p.Interface())
} else if t.Kind() == reflect.Struct {
n := t.NumField()
js.json.WriteByte('{')
// iterate through the fields
for i := 0; i < n; i++ {
tt := t.Field(i)
vv := v.Field(i)
js.json.WriteByte('"')
js.json.Write(jsonFormarter(tt.Name))
js.json.WriteByte('"')
js.json.WriteByte(':')
switch tt.Type.Kind() {
case reflect.String:
js.json.WriteByte('"')
s := []byte(vv.String())
js.json.Write(s)
js.json.WriteByte('"')
case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64:
js.json.WriteString(fmt.Sprintf("%v", vv))
case reflect.Slice:
js.arrays2Json(vv.Interface())
case reflect.Struct:
js.serializer(vv.Interface())
}
if i < n-1 {
js.json.WriteByte(',')
}
}
js.json.WriteByte('}')
} else {
err := errors.New("type passed is not of type Struct or Struct Pointer")
return "", err
}
return js.json.String(), nil
}
func (js *jstraSerialize) arrays2Json(str interface{}) {
t := reflect.TypeOf(str)
v := reflect.ValueOf(str)
k := t.Elem().Kind()
js.json.WriteByte('[')
defer js.json.WriteByte(']')
for x := 0; x < v.Len(); x++ {
switch k {
case reflect.String:
// js.json.WriteString("\"" + v.Index(x).String() + "\"")
js.json.WriteByte('"')
s := []byte(v.Index(x).String())
js.json.Write(s)
js.json.WriteByte('"')
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
reflect.Float32, reflect.Float64:
js.json.WriteString(fmt.Sprintf("%v", v.Index(x)))
case reflect.Struct:
js.serializer(v.Index(x).Interface())
}
if x < v.Len()-1 {
js.json.WriteByte(',')
}
}
}
func jsonFormarter(s string) []byte {
b := []byte(s)
if len(s) < 2 {
return bytes.ToLower(b)
}
r := b[1:]
lc := bytes.ToLower([]byte{b[0]})
return bytes.Join([][]byte{lc, r}, nil)
}