NationalRegisterNumber

NationalRegisterNumber is a .NET package for generating and validating Belgian national register numbers. The logic is based on the Official Documentation by the Belgian Government.

---

Features

• Validation: Verify if a given national register number is valid.
• Generation: Generate valid national register numbers with flexible parameters such as birth date and biological sex.
• Formatting: Format a string to YY.MM.DD-XXX.CC format using ToFormattedNationalRegisterNumber() string extension method.
• Extraction: Extract DateOnly birthdate and BiologicalSex using TryExtractBirthDate and TryExtractBiologicalSex string extension methods.

---

Installation

Add the package to your project via the .NET CLI:

dotnet add package WilvanBil.NationalRegisterNumber

Alternatively, find it on NuGet Package Manager by searching for WilvanBil.NationalRegisterNumber.

---

Usage

After installation, use the static class NationalRegisterNumberGenerator to generate or validate national register numbers.

Validation

The IsValid method checks whether a given national register number is valid and returns a boolean (true/false).

bool isValid = NationalRegisterNumberGenerator.IsValid("90022742191");

Generation

The Generate method creates valid national register numbers. The following overloads are available:

string number = NationalRegisterNumberGenerator.Generate();
string number = NationalRegisterNumberGenerator.Generate(DateOnly birthDate);
string number = NationalRegisterNumberGenerator.Generate(BiologicalSex sex);
string number = NationalRegisterNumberGenerator.Generate(DateOnly birthDate, BiologicalSex sex);
string number = NationalRegisterNumberGenerator.Generate(DateOnly minDate, DateOnly maxDate);
string number = NationalRegisterNumberGenerator.Generate(DateOnly minDate, DateOnly maxDate, BiologicalSex sex);
string number = NationalRegisterNumberGenerator.Generate(DateOnly birthDate, int followNumber);

Parameters

• followNumber: A number between 1 and 998 (inclusive). This parameter helps ensure uniqueness when generating numbers for the same date.
• minDate: Must be greater than or equal to 1900-01-01.

Exceptions

If the input parameters are invalid, the following exceptions may be thrown:

• ArgumentException: Indicates an invalid parameter with an explanatory message.

Formatting

You can format Belgian National Register Numbers into the official format (YY.MM.DD-XXX.CC) using the ToFormattedNationalRegisterNumber string extension method.

string nationalRegisterNumber = "90020200395";
string formattedNumber = nationalRegisterNumber.ToFormattedNationalRegisterNumber();
Console.WriteLine(formattedNumber); // Output: 90.02.02-003.95

Notes

• Input Validation: The method will return the original string if:
  • The input is null, empty, or not exactly 11 characters.
  • You can combine this with the IsValid method from NationalRegisterNumberGenerator for additional validation.

Extraction

You can extract DateOnly or BiologicalSex using TryExtractBiologicalSex and TryExtractBirthDate. Note that these methods do not check for full validity of the given input. For full validation, use the IsValid method first.

var nationalRegisterNumber = "90020200395";

if (!NationalRegisterNumberGenerator.IsValid(nationalRegisterNumber))
    return;

if (nationalRegisterNumber.TryExtractBiologicalSex(out var sex))
    Console.WriteLine($"Biological Sex: {sex}"); 
else
    Console.WriteLine("Invalid biological sex.");

if (nationalRegisterNumber.TryExtractBirthDate(out var birthDate))
    Console.WriteLine($"Birth Date: {birthDate}"); 
else
    Console.WriteLine("Invalid birth date.");

---

Example Usage

Validate a National Register Number

bool isValid = NationalRegisterNumberGenerator.IsValid("90022742191");
Console.WriteLine($"Is valid: {isValid}");

Generate and Format a Random National Register Number

string randomNumber = NationalRegisterNumberGenerator.Generate();
Console.WriteLine($"Generated number: {randomNumber.ToFormattedNationalRegisterNumber()}");

Generate with Specific Parameters

string numberByDate = NationalRegisterNumberGenerator.Generate(new DateOnly(1990, 1, 1));
string numberBySex = NationalRegisterNumberGenerator.Generate(BiologicalSex.Male);
string numberByDateAndSex = NationalRegisterNumberGenerator.Generate(new DateOnly(1990, 1, 1), BiologicalSex.Female);

Extract Birthdate

var nationalRegisterNumber = "90020200395";

if (nationalRegisterNumber.TryExtractBirthDate(out var birthDate))
    Console.WriteLine($"Birth Date: {birthDate}"); 
else
    Console.WriteLine("Invalid birth date.");

---

Contributing

We welcome contributions to this package! To get started:

1. Fork the repository: WilvanBil/NationalRegisterNumber.

2. Clone your fork:

   git clone https://github.com/YourUsername/NationalRegisterNumber.git

3. Create a new branch for your feature or bug fix:

   git checkout -b feature/my-new-feature

4. Make your changes and ensure all tests pass.

5. Submit a pull request with a clear description of your changes.

Issues

For any issues, requests, or feedback, please consider creating an issue.

Running Tests

Before submitting your changes, run the test suite:

dotnet test

---

⚠️ WARNING

This package is intended for testing and research purposes only. Do not use it in a live or production environment. It is specifically designed for unit and integration testing scenarios.

---

License

This project is licensed under the MIT License. See the LICENSE file for more details.