28 lines
910 B
C#
28 lines
910 B
C#
using FluentValidation;
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namespace BookHive.Validators;
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public static class CustomValidators
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{
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public static IRuleBuilderOptions<T, string>
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IsValidIsbn13<T>(this IRuleBuilder<T, string> ruleBuilder)
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{
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return ruleBuilder
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.Matches(@"^\d{13}$")
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.WithMessage("L’ISBN doit contenir 13 chiffres.")
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.Must(isbn =>
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{
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if (string.IsNullOrEmpty(isbn) || isbn.Length != 13)
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return false;
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var sum = 0;
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for (int i = 0; i < 12; i++)
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{
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var digit = isbn[i] - '0';
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sum += (i % 2 == 0) ? digit : digit * 3;
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}
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var checkDigit = (10 - (sum % 10)) % 10;
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return checkDigit == (isbn[12] - '0');
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})
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.WithMessage("Le chiffre de contrôle ISBN est invalide.");
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}
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} |