go-form/validation/range.go
2025-07-20 19:27:54 +02:00

117 lines
2.7 KiB
Go

package validation
// @license GNU AGPL version 3 or any later version
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
import (
"reflect"
"strings"
"github.com/spf13/cast"
)
type Range struct {
Min *float64
Max *float64
MinMessage string
MaxMessage string
RangeMessage string
TypeErrorMessage string
}
func NewRange() Range {
return Range{
MinMessage: "This value must be greater than or equal to {{ min }}.",
MaxMessage: "This value must be less than or equal to {{ max }}.",
RangeMessage: "This value should be between {{ min }} and {{ max }}.",
TypeErrorMessage: "This value can not be processed.",
}
}
func (c Range) WithMin(v float64) Range {
c.Min = &v
return c
}
func (c Range) WithMax(v float64) Range {
c.Max = &v
return c
}
func (c Range) WithRange(vMin, vMax float64) Range {
c.Min = &vMin
c.Max = &vMax
return c
}
func (c Range) Validate(data any) []Error {
if c.Min == nil && c.Max == nil {
return []Error{}
}
errors := []Error{}
t := reflect.TypeOf(data)
if t.Kind() == reflect.Ptr {
t = t.Elem()
}
switch t.Kind() {
case reflect.Float32:
case reflect.Float64:
case reflect.Int:
case reflect.Int16:
case reflect.Int32:
case reflect.Int64:
case reflect.Int8:
case reflect.Uint:
case reflect.Uint16:
case reflect.Uint32:
case reflect.Uint64:
case reflect.Uint8:
case reflect.String:
isValidMin := c.Min == nil || *c.Min <= cast.ToFloat64(data.(string))
isValidMax := c.Max == nil || *c.Max >= cast.ToFloat64(data.(string))
if !isValidMin || !isValidMax {
errors = append(errors, Error(c.BuildMessage()))
}
default:
errors = append(errors, Error(c.TypeErrorMessage))
}
return errors
}
func (c *Range) BuildMessage() string {
var message string
if c.Min != nil && c.Max == nil {
message = c.MinMessage
} else if c.Max != nil && c.Min == nil {
message = c.MaxMessage
} else {
message = c.RangeMessage
}
message = strings.ReplaceAll(message, "{{ min }}", cast.ToString(c.Min))
message = strings.ReplaceAll(message, "{{ max }}", cast.ToString(c.Max))
return message
}