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NIP, REGON, PESEL Validator
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void Main() | |
{ | |
string nip = "1220781342"; | |
Console.WriteLine(Validator.IsValidNIP(nip) ? "NIP is valid" : "NIP is not valid"); | |
string regon = "730295378"; | |
Console.WriteLine(Validator.IsValidREGON(regon) ? "REGON is valid" : "REGON is not valid"); | |
string pesel = "93111698132"; | |
Console.WriteLine(Validator.IsValidPESEL(pesel) ? "PESEL is valid" : "PESEL is not valid"); | |
} | |
public class Validator | |
{ | |
private static byte[] ToByteArray(string input) => input | |
.ToCharArray() | |
.Select(c => byte.Parse(c.ToString())) | |
.ToArray(); | |
private static int ControlSum(byte[] numbers, byte[] weights) => numbers | |
.Take(numbers.Length - 1) | |
.Select((number, index) => new { number, index }) | |
.Sum(n => n.number * weights[n.index]); | |
private static bool IsValid(string input, byte[] weights, Func<int, int> control) | |
{ | |
var numbers = ToByteArray(input); | |
bool result = false; | |
if (input.Length == weights.Length + 1) | |
{ | |
int controlSum = ControlSum(numbers, weights); | |
int controlNum = control(controlSum); | |
if (controlNum == 10) | |
{ | |
controlNum = 0; | |
} | |
result = controlNum == numbers.Last(); | |
} | |
return result; | |
} | |
public static bool IsValidREGON(string input) | |
{ | |
byte[] weights = null; | |
switch (input.Length) | |
{ | |
case 7: weights = new byte[] { 2, 3, 4, 5, 6, 7 }; | |
break; | |
case 9: weights = new byte[] { 8, 9, 2, 3, 4, 5, 6, 7 }; | |
break; | |
case 14: weights = new byte[] { 2, 4, 8, 5, 0, 9, 7, 3, 6, 1, 2, 4, 8 }; | |
break; | |
default: return false; | |
} | |
return IsValid(input, weights, controlSum => controlSum % 11); | |
} | |
public static bool IsValidPESEL(string input) | |
{ | |
byte[] weights = { 1, 3, 7, 9, 1, 3, 7, 9, 1, 3 }; | |
return IsValid(input, weights, controlSum => 10 - controlSum % 10); | |
} | |
public static bool IsValidNIP(string input) | |
{ | |
byte[] weights = { 6, 5, 7, 2, 3, 4, 5, 6, 7 }; | |
return IsValid(input, weights, controlSum => controlSum % 11); | |
} | |
} |
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