Validate israeli IDs in go

main.go

package validate_israeli_id_module

import (
	"regexp"
	"strconv"
	"strings"
)

var(
	IDSanitizer = regexp.MustCompile(`^[0-9]{1,9}$`)
	CONST_ONE_TWO = [9]int{1,2,1,2,1,2,1,2,1}
)

func StringCharsToIntArr(inputString string) []int {
	var output []int
	for _, r := range []rune(inputString) {
		output = append(output, int(r - '0'))
	}
	return output
}

func ValidateID(content string) bool {
	if !IDSanitizer.MatchString(content) {
		return false
	}

	content_runes := StringCharsToIntArr(strings.Repeat("0", 9 - len(content)) + content)

	multiplied := StringCharsToIntArr(strings.Repeat("0", 9))

	for i := 0; i < 9; i++ {
		multiplied[i] = content_runes[i] * CONST_ONE_TWO[i]

		if multiplied[i] > 9 {
			asstr := StringCharsToIntArr(strconv.Itoa(multiplied[i]))
			sum_asstr := 0
			for _, ru := range asstr {
				sum_asstr += ru
			}
			multiplied[i] = sum_asstr
		}
	}
	summed_multiplied := 0
	for _, multiplied_item := range multiplied {
		summed_multiplied += multiplied_item
	}
	if summed_multiplied % 10 == 0 {
		return true
	}
	return false
}