peridot/vendor/github.com/asaskevich/govalidator/converter.go

82 lines
1.8 KiB
Go
Raw Normal View History

2022-07-07 20:11:50 +00:00
package govalidator
import (
"encoding/json"
"fmt"
"reflect"
"strconv"
)
// ToString convert the input to a string.
func ToString(obj interface{}) string {
res := fmt.Sprintf("%v", obj)
return res
}
// ToJSON convert the input to a valid JSON string
func ToJSON(obj interface{}) (string, error) {
res, err := json.Marshal(obj)
if err != nil {
res = []byte("")
}
return string(res), err
}
// ToFloat convert the input string to a float, or 0.0 if the input is not a float.
func ToFloat(value interface{}) (res float64, err error) {
val := reflect.ValueOf(value)
switch value.(type) {
case int, int8, int16, int32, int64:
res = float64(val.Int())
case uint, uint8, uint16, uint32, uint64:
res = float64(val.Uint())
case float32, float64:
res = val.Float()
case string:
res, err = strconv.ParseFloat(val.String(), 64)
if err != nil {
res = 0
}
default:
err = fmt.Errorf("ToInt: unknown interface type %T", value)
res = 0
}
return
}
// ToInt convert the input string or any int type to an integer type 64, or 0 if the input is not an integer.
func ToInt(value interface{}) (res int64, err error) {
val := reflect.ValueOf(value)
switch value.(type) {
case int, int8, int16, int32, int64:
res = val.Int()
case uint, uint8, uint16, uint32, uint64:
res = int64(val.Uint())
case float32, float64:
res = int64(val.Float())
case string:
if IsInt(val.String()) {
res, err = strconv.ParseInt(val.String(), 0, 64)
if err != nil {
res = 0
}
} else {
err = fmt.Errorf("ToInt: invalid numeric format %g", value)
res = 0
}
default:
err = fmt.Errorf("ToInt: unknown interface type %T", value)
res = 0
}
return
}
// ToBoolean convert the input string to a boolean.
func ToBoolean(str string) (bool, error) {
return strconv.ParseBool(str)
}