39 lines
702 B
Go
39 lines
702 B
Go
package validation
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import (
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"strconv"
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"github.com/go-playground/validator/v10"
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)
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func ValidateDriversLicence(fl validator.FieldLevel) bool {
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fieldValue := fl.Field().String()
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if len(fieldValue) != 11 {
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return false
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}
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id, tenthChar := string(fieldValue[:9]), string(fieldValue[9])
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if tenthChar == "X" {
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tenthChar = "10"
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}
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tenthValue, _ := strconv.ParseInt(tenthChar, 10, 8)
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// for readability
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weights := []int{9, 8, 7, 6, 5, 4, 3, 2, 1}
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sum := 0
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for i := 0; i < 9; i++ {
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char := string(id[i])
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value, _ := strconv.ParseInt(char, 36, 64)
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sum += int(value) * weights[i]
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}
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calcCheckDigit := sum % 11
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if calcCheckDigit != int(tenthValue) {
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return false
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}
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return true
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}
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