safing-portbase/database/accessor/accessor-json-bytes.go
2019-09-20 10:36:55 +02:00

116 lines
3.2 KiB
Go

package accessor
import (
"github.com/tidwall/gjson"
"github.com/tidwall/sjson"
)
// JSONBytesAccessor is a json string with get functions.
type JSONBytesAccessor struct {
json *[]byte
}
// NewJSONBytesAccessor adds the Accessor interface to a JSON bytes string.
func NewJSONBytesAccessor(json *[]byte) *JSONBytesAccessor {
return &JSONBytesAccessor{
json: json,
}
}
// Set sets the value identified by key.
func (ja *JSONBytesAccessor) Set(key string, value interface{}) error {
result := gjson.GetBytes(*ja.json, key)
if result.Exists() {
err := checkJSONValueType(result, key, value)
if err != nil {
return err
}
}
new, err := sjson.SetBytes(*ja.json, key, value)
if err != nil {
return err
}
*ja.json = new
return nil
}
// Get returns the value found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) Get(key string) (value interface{}, ok bool) {
result := gjson.GetBytes(*ja.json, key)
if !result.Exists() {
return nil, false
}
return result.Value(), true
}
// GetString returns the string found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) GetString(key string) (value string, ok bool) {
result := gjson.GetBytes(*ja.json, key)
if !result.Exists() || result.Type != gjson.String {
return emptyString, false
}
return result.String(), true
}
// GetStringArray returns the []string found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) GetStringArray(key string) (value []string, ok bool) {
result := gjson.GetBytes(*ja.json, key)
if !result.Exists() && !result.IsArray() {
return nil, false
}
slice := result.Array()
new := make([]string, len(slice))
for i, res := range slice {
if res.Type == gjson.String {
new[i] = res.String()
} else {
return nil, false
}
}
return new, true
}
// GetInt returns the int found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) GetInt(key string) (value int64, ok bool) {
result := gjson.GetBytes(*ja.json, key)
if !result.Exists() || result.Type != gjson.Number {
return 0, false
}
return result.Int(), true
}
// GetFloat returns the float found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) GetFloat(key string) (value float64, ok bool) {
result := gjson.GetBytes(*ja.json, key)
if !result.Exists() || result.Type != gjson.Number {
return 0, false
}
return result.Float(), true
}
// GetBool returns the bool found by the given json key and whether it could be successfully extracted.
func (ja *JSONBytesAccessor) GetBool(key string) (value bool, ok bool) {
result := gjson.GetBytes(*ja.json, key)
switch {
case !result.Exists():
return false, false
case result.Type == gjson.True:
return true, true
case result.Type == gjson.False:
return false, true
default:
return false, false
}
}
// Exists returns the whether the given key exists.
func (ja *JSONBytesAccessor) Exists(key string) bool {
result := gjson.GetBytes(*ja.json, key)
return result.Exists()
}
// Type returns the accessor type as a string.
func (ja *JSONBytesAccessor) Type() string {
return "JSONBytesAccessor"
}