43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
// Copyright (c) 2023-2024 Onur Cinar.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
// https://github.com/cinar/checker
|
|
|
|
package checker
|
|
|
|
import (
|
|
"errors"
|
|
"reflect"
|
|
"unicode"
|
|
)
|
|
|
|
// tagAlphanumeric is the tag of the checker.
|
|
const tagAlphanumeric = "alphanumeric"
|
|
|
|
// ErrNotAlphanumeric indicates that the given string contains non-alphanumeric characters.
|
|
var ErrNotAlphanumeric = errors.New("please use only letters and numbers")
|
|
|
|
// IsAlphanumeric checks if the given string consists of only alphanumeric characters.
|
|
func IsAlphanumeric(value string) error {
|
|
for _, c := range value {
|
|
if !unicode.IsDigit(c) && !unicode.IsLetter(c) {
|
|
return ErrNotAlphanumeric
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// makeAlphanumeric makes a checker function for the alphanumeric checker.
|
|
func makeAlphanumeric(_ string) CheckFunc {
|
|
return checkAlphanumeric
|
|
}
|
|
|
|
// checkAlphanumeric checks if the given string consists of only alphanumeric characters.
|
|
func checkAlphanumeric(value, _ reflect.Value) error {
|
|
if value.Kind() != reflect.String {
|
|
panic("string expected")
|
|
}
|
|
|
|
return IsAlphanumeric(value.String())
|
|
}
|