mirror of
https://github.com/marcusDenslow/terminalShop.git
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marcusDenslow
92d5c46e19
a while back i made shippo skip "validate" addresses that didnt specifically fail the validation process. this meant that addresses outside the us worked as long as they didnt specifically return false. this is now reverted to test actual validaion. also changed some error messages in the TUI so that the entire message type is not also printed, just the message
118 lines
2.4 KiB
Go
118 lines
2.4 KiB
Go
package validate
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import (
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"fmt"
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"net/mail"
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)
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type ErrorHandler func(str string) error
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func WithinLen(min, max int, name string) ErrorHandler {
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return func(str string) error {
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if len(str) >= min && len(str) <= max {
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return nil
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}
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return fmt.Errorf(
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"expected %s to be between %d and %d, but got %d",
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name,
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min,
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max,
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len(str),
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)
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}
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}
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func CcnValidator(cardNumber string) error {
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if len(cardNumber) < 13 {
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return fmt.Errorf("invalid credit card number")
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}
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total := 0
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isSecondDigit := false
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// Iterate through the card number digits in reverse order
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for i := len(cardNumber) - 1; i >= 0; i-- {
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// Skip spaces or any other non-digit characters
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if cardNumber[i] < '0' || cardNumber[i] > '9' {
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continue
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}
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// Convert the digit character to an integer
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digit := int(cardNumber[i] - '0')
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if isSecondDigit {
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// Double the digit for each second digit from the right
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digit *= 2
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if digit > 9 {
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// If doubling the digit results in a two-digit number, subtract 9 to get the sum of digits
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digit -= 9
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}
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}
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// Add the current digit to the total sum
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total += digit
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// Toggle the flag for the next iteration
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isSecondDigit = !isSecondDigit
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}
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// Check if the total sum mod 10 is not zero (valid card numbers should result in total mod 10 == 0)
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if total%10 != 0 {
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return fmt.Errorf("invalid credit card number")
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}
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return nil
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}
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func IsDigits(name string) ErrorHandler {
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return func(str string) error {
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for _, c := range str {
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if !(c >= '0' && c <= '9') {
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return fmt.Errorf("[%s] expected only digits but got %s", name, str)
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}
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}
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return nil
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}
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}
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func MustBeLen(length int, name string) ErrorHandler {
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return func(str string) error {
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if str == "" {
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return nil
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}
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if len(str) != length {
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return fmt.Errorf("expected %s to be length %d but got %d", name, length, len(str))
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}
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return nil
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}
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}
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func NotEmpty(name string) ErrorHandler {
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return func(str string) error {
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if len(str) == 0 {
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return fmt.Errorf("%s cannot be empty", name)
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}
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return nil
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}
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}
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func EmailValidator(str string) error {
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_, err := mail.ParseAddress(str)
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if err != nil {
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return fmt.Errorf("not a valid email address")
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}
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return nil
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}
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func Compose(input ...ErrorHandler) ErrorHandler {
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return func(str string) error {
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for _, f := range input {
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err := f(str)
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if err != nil {
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return err
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}
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}
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return nil
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}
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}
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