D3vugu-components/components/input/field-binder.go

170 lines
3.7 KiB
Go

package input
import (
"fmt"
"strconv"
)
// FieldBinder is an interface that everything that every type that wants to bind to an input field must implement.
type FieldBinder interface {
String() string // String returns the bound variable formatted in the users/current locale.
SetString(string) error // SetString parses the string value in the users/current locale and sets the value of the bound variable.
HTMLInputType() string // HTMLInputType returns the to be used type parameter for the HTML input element.
}
// FieldBindAny implements the FieldBinder interface for all basic types.
type FieldBindAny struct{ Value any }
func (f FieldBindAny) String() string {
switch v := f.Value.(type) {
case *string:
return *v
case *int:
return strconv.FormatInt(int64(*v), 10)
case *int8:
return strconv.FormatInt(int64(*v), 10)
case *int16:
return strconv.FormatInt(int64(*v), 10)
case *int32:
return strconv.FormatInt(int64(*v), 10)
case *int64:
return strconv.FormatInt(int64(*v), 10)
case *uint:
return strconv.FormatUint(uint64(*v), 10)
case *uint8:
return strconv.FormatUint(uint64(*v), 10)
case *uint16:
return strconv.FormatUint(uint64(*v), 10)
case *uint32:
return strconv.FormatUint(uint64(*v), 10)
case *uint64:
return strconv.FormatUint(uint64(*v), 10)
case *float32:
return strconv.FormatFloat(float64(*v), 'f', -1, 32) // TODO: Format number in current user's locale
case *float64:
return strconv.FormatFloat(float64(*v), 'f', -1, 64)
}
return ""
}
func (f FieldBindAny) SetString(value string) error {
switch v := f.Value.(type) {
case *string:
*v = value
case *int:
val, err := strconv.ParseInt(value, 10, 0)
if err != nil {
return err
}
*v = int(val)
case *int8:
val, err := strconv.ParseInt(value, 10, 8)
if err != nil {
return err
}
*v = int8(val)
case *int16:
val, err := strconv.ParseInt(value, 10, 16)
if err != nil {
return err
}
*v = int16(val)
case *int32:
val, err := strconv.ParseInt(value, 10, 32)
if err != nil {
return err
}
*v = int32(val)
case *int64:
val, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return err
}
*v = int64(val)
case *uint:
val, err := strconv.ParseUint(value, 10, 0)
if err != nil {
return err
}
*v = uint(val)
case *uint8:
val, err := strconv.ParseUint(value, 10, 8)
if err != nil {
return err
}
*v = uint8(val)
case *uint16:
val, err := strconv.ParseUint(value, 10, 16)
if err != nil {
return err
}
*v = uint16(val)
case *uint32:
val, err := strconv.ParseUint(value, 10, 32)
if err != nil {
return err
}
*v = uint32(val)
case *uint64:
val, err := strconv.ParseUint(value, 10, 64)
if err != nil {
return err
}
*v = uint64(val)
case *float32:
val, err := strconv.ParseFloat(value, 32)
if err != nil {
return err
}
*v = float32(val)
case *float64:
val, err := strconv.ParseFloat(value, 64)
if err != nil {
return err
}
*v = float64(val)
default:
return fmt.Errorf("bound type %T is not supported", f.Value)
}
return nil
}
func (f FieldBindAny) HTMLInputType() string {
switch f.Value.(type) {
case *string:
return "text"
case *int, *int8, *int16, *int32, *int64, *uint, *uint8, *uint16, *uint32, *uint64:
return "number"
case *float32, *float64:
return "number"
}
return "text"
}
// FieldBindPassword implements the FieldBinder interface for strings.
type FieldBindPassword struct{ Value *string }
func (f FieldBindPassword) String() string {
if f.Value != nil {
return *f.Value
}
return ""
}
func (f FieldBindPassword) SetString(value string) error {
if f.Value != nil {
*f.Value = value
return nil
}
return fmt.Errorf("no value is bound to this component")
}
func (f FieldBindPassword) HTMLInputType() string {
return "password"
}