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custom-types.go
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custom-types.go
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package sdk
/*
Copyright 2016 Alexander I.Grafov <[email protected]>
Copyright 2016-2019 The Grafana SDK authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
ॐ तारे तुत्तारे तुरे स्व
*/
import (
"bytes"
"encoding/json"
"errors"
"strconv"
"strings"
)
type BoolString struct {
Flag bool
Value string
}
func (s *BoolString) UnmarshalJSON(raw []byte) error {
if raw == nil || bytes.Equal(raw, []byte(`"null"`)) {
return nil
}
var (
tmp string
err error
)
if raw[0] != '"' {
if bytes.Equal(raw, []byte("true")) {
s.Flag = true
return nil
}
if bytes.Equal(raw, []byte("false")) {
return nil
}
return errors.New("bad boolean value provided")
}
if err = json.Unmarshal(raw, &tmp); err != nil {
return err
}
s.Value = tmp
return nil
}
func (s BoolString) MarshalJSON() ([]byte, error) {
if s.Value != "" {
var buf bytes.Buffer
buf.WriteRune('"')
buf.WriteString(s.Value)
buf.WriteRune('"')
return buf.Bytes(), nil
}
return strconv.AppendBool([]byte{}, s.Flag), nil
}
type BoolInt struct {
Flag bool
Value *int64
}
func (s *BoolInt) UnmarshalJSON(raw []byte) error {
if raw == nil || bytes.Equal(raw, []byte(`"null"`)) {
return nil
}
var (
tmp int64
err error
)
if tmp, err = strconv.ParseInt(string(raw), 10, 64); err != nil {
if bytes.Equal(raw, []byte("true")) {
s.Flag = true
return nil
}
if bytes.Equal(raw, []byte("false")) {
return nil
}
return errors.New("bad value provided")
}
s.Value = &tmp
return nil
}
func (s BoolInt) MarshalJSON() ([]byte, error) {
if s.Value != nil {
return strconv.AppendInt([]byte{}, *s.Value, 10), nil
}
return strconv.AppendBool([]byte{}, s.Flag), nil
}
func NewIntString(i int64) *IntString {
return &IntString{
Value: i,
Valid: true,
}
}
// IntString represents special type for json values that could be strings or ints: 100 or "100"
type IntString struct {
Value int64
Valid bool
}
// UnmarshalJSON implements custom unmarshalling for IntString type
func (v *IntString) UnmarshalJSON(raw []byte) error {
if raw == nil || bytes.Equal(raw, []byte(`"null"`)) || bytes.Equal(raw, []byte(`""`)) {
return nil
}
strVal := string(raw)
if rune(raw[0]) == '"' {
strVal = strings.Trim(strVal, `"`)
}
i, err := strconv.ParseInt(strVal, 10, 64)
if err != nil {
return err
}
v.Value = i
v.Valid = true
return nil
}
// MarshalJSON implements custom marshalling for IntString type
func (v *IntString) MarshalJSON() ([]byte, error) {
if v.Valid {
strVal := strconv.FormatInt(v.Value, 10)
return []byte(strVal), nil
}
return []byte(`"null"`), nil
}
func NewFloatString(i float64) *FloatString {
return &FloatString{
Value: i,
Valid: true,
}
}
// FloatString represents special type for json values that could be strings or ints: 100 or "100"
type FloatString struct {
Value float64
Valid bool
}
// UnmarshalJSON implements custom unmarshalling for FloatString type
func (v *FloatString) UnmarshalJSON(raw []byte) error {
if raw == nil || bytes.Equal(raw, []byte(`"null"`)) || bytes.Equal(raw, []byte(`""`)) {
return nil
}
strVal := string(raw)
if rune(raw[0]) == '"' {
strVal = strings.Trim(strVal, `"`)
}
i, err := strconv.ParseFloat(strVal, 64)
if err != nil {
return err
}
v.Value = i
v.Valid = true
return nil
}
// MarshalJSON implements custom marshalling for FloatString type
func (v *FloatString) MarshalJSON() ([]byte, error) {
if v.Valid {
strVal := strconv.FormatFloat(v.Value, 'g', -1, 64)
return []byte(strVal), nil
}
return []byte(`"null"`), nil
}
// StringSliceString represents special type for json values that could be
// strings or slice of strings: "something" or ["something"].
type StringSliceString struct {
Value []string
Valid bool
}
// UnmarshalJSON implements custom unmarshalling for StringSliceString type.
func (v *StringSliceString) UnmarshalJSON(raw []byte) error {
if raw == nil || bytes.Equal(raw, []byte(`"null"`)) {
return nil
}
// First try with string.
var str string
if err := json.Unmarshal(raw, &str); err == nil {
v.Value = []string{str}
v.Valid = true
return nil
}
// Lastly try with string slice.
var strSlice []string
err := json.Unmarshal(raw, &strSlice)
if err != nil {
return err
}
v.Value = strSlice
v.Valid = true
return nil
}
// MarshalJSON implements custom marshalling for StringSliceString type.
func (v *StringSliceString) MarshalJSON() ([]byte, error) {
if !v.Valid {
return []byte(`"null"`), nil
}
return json.Marshal(v.Value)
}