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digits.go
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digits.go
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// Package checker is a Go library for validating user input through struct tags.
//
// https://github.com/cinar/checker
//
// Copyright 2023 Onur Cinar. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
//
package checker
import (
"reflect"
"unicode"
)
// CheckerDigits is the name of the checker.
const CheckerDigits = "digits"
// ResultNotDigits indicates that the given string contains non-digit characters.
const ResultNotDigits = "NOT_DIGITS"
// IsDigits checks if the given string consists of only digit characters.
func IsDigits(value string) Result {
for _, c := range value {
if !unicode.IsDigit(c) {
return ResultNotDigits
}
}
return ResultValid
}
// makeDigits makes a checker function for the digits checker.
func makeDigits(_ string) CheckFunc {
return checkDigits
}
// checkDigits checks if the given string consists of only digit characters.
func checkDigits(value, _ reflect.Value) Result {
if value.Kind() != reflect.String {
panic("string expected")
}
return IsDigits(value.String())
}