Add more exceptions

DrinkRateAPI/Exceptions/ExceptionHandlingMiddleware.cs

@@ -0,0 +1,47 @@
+using System.Net;
+
+namespace DrinkRateAPI.Exceptions;
+
+public record ExceptionResponse(HttpStatusCode StatusCode, string Description);
+
+public class ExceptionHandlingMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly ILogger<ExceptionHandlingMiddleware> _logger;
+
+    public ExceptionHandlingMiddleware(RequestDelegate next, ILogger<ExceptionHandlingMiddleware> logger)
+    {
+        _next = next;
+        _logger = logger;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        try
+        {
+            await _next(context);
+        }
+        catch (Exception ex)
+        {
+            await HandleExceptionAsync(context, ex);
+        }
+    }
+
+    private async Task HandleExceptionAsync(HttpContext context, Exception exception)
+    {
+        _logger.LogError(exception, "An unexpected error occurred.");
+
+
+        ExceptionResponse response = exception switch
+        {
+            ApplicationException _ => new ExceptionResponse(HttpStatusCode.BadRequest, "Application exception occurred."),
+            KeyNotFoundException _ => new ExceptionResponse(HttpStatusCode.NotFound, "The request key not found."),
+            UnauthorizedAccessException _ => new ExceptionResponse(HttpStatusCode.Unauthorized, "Unauthorized."),
+            _ => new ExceptionResponse(HttpStatusCode.InternalServerError, "Internal server error. Please retry later.")
+        };
+
+        context.Response.ContentType = "application/json";
+        context.Response.StatusCode = (int)response.StatusCode;
+        await context.Response.WriteAsJsonAsync(response);
+    }
+}

DrinkRateAPI/Exceptions/Exceptions.cs

@@ -1,7 +1,38 @@
 namespace DrinkRateAPI.Exceptions;
 
-public class DrinkRateException : Exception;
+public abstract class DrinkRateException : Exception;
 
+/// <summary>
+/// 400 - Bad request
+/// </summary>
+public class BadRequestException : DrinkRateException;
+
+/// <summary>
+/// 401 - Unauthenticated
+/// </summary>
+public class UnauthenticatedException : DrinkRateException;
+
+/// <summary>
+/// 402 - Payment required
+/// </summary>
+public class PaymentRequiredException : DrinkRateException;
+
+/// <summary>
+/// 403 - Forbidden
+/// </summary>
+public class ForbiddenException : DrinkRateException;
+
+/// <summary>
+/// 404 - Not found
+/// </summary>
 public class NotFoundException : DrinkRateException;
 
-public class UnauthorizedException : DrinkRateException;
+/// <summary>
+/// 418 - I'm a teapot
+/// </summary>
+public class IamATeapotException : DrinkRateException;
+
+/// <summary>
+/// 451 - Unavailable for lagal reasons
+/// </summary>
+public class UnavailableForLagalReasonsException : DrinkRateException;