gtsocial-umbx

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util.go (1440B)

      1 package form
      2 
      3 import (
      4 	"reflect"
      5 	"strconv"
      6 )
      7 
      8 // ExtractType gets the actual underlying type of field value.
      9 // it is exposed for use within you Custom Functions
     10 func ExtractType(current reflect.Value) (reflect.Value, reflect.Kind) {
     11 
     12 	switch current.Kind() {
     13 	case reflect.Ptr:
     14 
     15 		if current.IsNil() {
     16 			return current, reflect.Ptr
     17 		}
     18 
     19 		return ExtractType(current.Elem())
     20 
     21 	case reflect.Interface:
     22 
     23 		if current.IsNil() {
     24 			return current, reflect.Interface
     25 		}
     26 
     27 		return ExtractType(current.Elem())
     28 
     29 	default:
     30 		return current, current.Kind()
     31 	}
     32 }
     33 
     34 func parseBool(str string) (bool, error) {
     35 
     36 	switch str {
     37 	case "1", "t", "T", "true", "TRUE", "True", "on", "yes", "ok":
     38 		return true, nil
     39 	case "", "0", "f", "F", "false", "FALSE", "False", "off", "no":
     40 		return false, nil
     41 	}
     42 
     43 	// strconv.NumError mimicing exactly the strconv.ParseBool(..) error and type
     44 	// to ensure compatibility with std library and beyond.
     45 	return false, &strconv.NumError{Func: "ParseBool", Num: str, Err: strconv.ErrSyntax}
     46 }
     47 
     48 // hasValue determines if a reflect.Value is it's default value
     49 func hasValue(field reflect.Value) bool {
     50 	switch field.Kind() {
     51 	case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
     52 		return !field.IsNil()
     53 	default:
     54 		if !field.IsValid() {
     55 			return false
     56 		}
     57 		if !field.Type().Comparable() {
     58 			return true
     59 		}
     60 		return field.Interface() != reflect.Zero(field.Type()).Interface()
     61 	}
     62 }