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package form
import (
"reflect"
"strconv"
)
// ExtractType gets the actual underlying type of field value.
// it is exposed for use within you Custom Functions
func ExtractType(current reflect.Value) (reflect.Value, reflect.Kind) {
switch current.Kind() {
case reflect.Ptr:
if current.IsNil() {
return current, reflect.Ptr
}
return ExtractType(current.Elem())
case reflect.Interface:
if current.IsNil() {
return current, reflect.Interface
}
return ExtractType(current.Elem())
default:
return current, current.Kind()
}
}
func parseBool(str string) (bool, error) {
switch str {
case "1", "t", "T", "true", "TRUE", "True", "on", "yes", "ok":
return true, nil
case "", "0", "f", "F", "false", "FALSE", "False", "off", "no":
return false, nil
}
// strconv.NumError mimicing exactly the strconv.ParseBool(..) error and type
// to ensure compatibility with std library and beyond.
return false, &strconv.NumError{Func: "ParseBool", Num: str, Err: strconv.ErrSyntax}
}
// hasValue determines if a reflect.Value is it's default value
func hasValue(field reflect.Value) bool {
switch field.Kind() {
case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
return !field.IsNil()
default:
if !field.IsValid() {
return false
}
if !field.Type().Comparable() {
return true
}
return field.Interface() != reflect.Zero(field.Type()).Interface()
}
}
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