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refactor(TaskExtensions): TaskExtensions verallgemeinern, um benutzerdefinierte Ausnahmegeneratoren zu unterstützen

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- Feste NotFoundException durch generischen Ausnahmegenerator in ThrowIfNull-Methoden ersetzt.
- Neue Exceptions-Hilfsklasse für die Erstellung gängiger Ausnahmen (NotFound, BadRequest, Forbidden) hinzugefügt.
- Funktionalität der Then-Erweiterungsmethode unverändert beibehalten.
This commit is contained in:
tekh
2025-08-25 12:41:27 +02:00
parent 86d8fcda07
commit e1f793e571
2 changed files with 36 additions and 10 deletions
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43
EnvelopeGenerator.Application/Extensions/TaskExtensions.cs
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@@ -9,32 +9,34 @@ public static class TaskExtensions
{
/// <summary>
/// Awaits the specified task and ensures that the result is not <c>null</c>.
/// If the result is <c>null</c>, a <see cref="NotFoundException"/> is thrown.
/// If the result is <c>null</c>, the exception created by factory-method is thrown.
/// </summary>
/// <typeparam name="T">The type of the result.</typeparam>
/// <typeparam name="TException">The type of the exception.</typeparam>
/// <param name="task">The task to await.</param>
/// <param name="exceptionMessage">Optional custom exception message.</param>
/// <param name="factory">Exception provider</param>
/// <returns>The awaited result if not <c>null</c>.</returns>
/// <exception cref="NotFoundException">Thrown if the result is <c>null</c>.</exception>
public static async Task<T> ThrowIfNull<T>(this Task<T?> task, string? exceptionMessage = null)
/// <exception>Thrown if the result is <c>null</c>.</exception>
public static async Task<T> ThrowIfNull<T, TException>(this Task<T?> task, Func<TException> factory) where TException : Exception
{
var result = await task;
return result ?? throw new NotFoundException(exceptionMessage);
return result ?? throw factory();
}
/// <summary>
/// Awaits the specified task and ensures that the result is not <c>empty</c>.
/// If the result contains no elements, a <see cref="NotFoundException"/> is thrown.
/// If the result contains no elements, the exception created by factory-method is thrown.
/// </summary>
/// <typeparam name="T">The element type of the collection.</typeparam>
/// <typeparam name="TException">The type of the exception.</typeparam>
/// <param name="task">The task to await.</param>
/// <param name="exceptionMessage">Optional custom exception message.</param>
/// <param name="factory">Exception provider</param>
/// <returns>The awaited collection if it is not <c>null</c> or empty.</returns>
/// <exception cref="NotFoundException">Thrown if the result is <c>null</c> or empty.</exception>
public static async Task<IEnumerable<T>> ThrowIfNull<T>(this Task<IEnumerable<T>> task, string? exceptionMessage = null)
public static async Task<IEnumerable<T>> ThrowIfNull<T, TException>(this Task<IEnumerable<T>> task, Func<TException> factory) where TException : Exception
{
var result = await task;
return result?.Any() ?? false ? result : throw new NotFoundException(exceptionMessage);
return result?.Any() ?? false ? result : throw factory();
}
/// <summary>
@@ -51,3 +53,26 @@ public static class TaskExtensions
return act(res);
}
}
/// <summary>
///
/// </summary>
public static class Exceptions
{
/// <summary>
///
/// </summary>
public static NotFoundException NotFound() => new();
/// <summary>
///
/// </summary>
/// <returns></returns>
public static BadRequestException BadRequest() => new();
/// <summary>
///
/// </summary>
/// <returns></returns>
public static ForbiddenException Forbidden() => new();
}