Backend error handling implementation

blotztask-api/Data/Seeding/BlotzContextSeed.cs

@@ -17,7 +17,7 @@
         // Seed admin user
         var defaultUser = new User
         {
-            UserName = "blotztest1",
+            UserName = "blotztest1@gmail.com",
             Email = "blotztest1@gmail.com",
             EmailConfirmed = true,
         };
@@ -46,7 +46,7 @@
                 new Claim("CanDelete", "true")
             };
 
             await userManager.AddClaimsAsync(userAdded, claims);
             user = userAdded;
             Console.WriteLine("User creation Success.");
         }

blotztask-api/Middleware/ErrorHandlerMiddleware.cs

@@ -0,0 +1,40 @@
+using BlotzTask.Models.ApiResponse;
+
+public class ErrorHandlingMiddleware
+{ 
+    private readonly RequestDelegate _next;
+
+    public ErrorHandlingMiddleware(RequestDelegate next)
+    {
+        _next = next;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        try
+        {
+            await _next(context);
+        }
+
+        catch (UnauthorizedAccessException ex)
+        {
+            var errorMessage = string.IsNullOrWhiteSpace(ex.Message) ? "Unauthorized access." : ex.Message;
+
+            context.Response.StatusCode = StatusCodes.Status401Unauthorized;
+            await context.Response.WriteAsJsonAsync(new ApiResponse<object> 
+            { 
+                Success = false, 
+                Message = errorMessage 
+            });
+        }
+
+        catch (Exception ex)
+        {
+            //TODO: Implement logging
+            Console.WriteLine($"Unhandled Exception: {ex}");
+
+            context.Response.StatusCode = StatusCodes.Status500InternalServerError;
+            await context.Response.WriteAsJsonAsync(new ApiResponse<object> { Success = false, Message = "An error occurred while processing your request." });
+        }
+    }
+}

blotztask-api/Models/ApiResponse/ApiResponse.cs

@@ -0,0 +1,8 @@
+namespace BlotzTask.Models.ApiResponse;
+
+public class ApiResponse<T>
+{
+    public bool Success { get; set; }
+    public string Message { get; set; } = string.Empty;
+    public T? Data { get; set; }
+}

blotztask-api/Program.cs

@@ -55,7 +55,7 @@
 
     builder.Configuration.AddAzureKeyVault(keyVaultEndpoint, new DefaultKeyVaultSecretManager());
 
     var client = new SecretClient(new Uri(keyVaultEndpoint), new DefaultAzureCredential());
     builder.Services.AddDbContext<BlotzTaskDbContext>(options => options.UseSqlServer(client.GetSecret("db-string-connection").Value.Value.ToString()));
 
 }
@@ -80,6 +80,7 @@
 builder.Services.AddFluentValidationAutoValidation();
 
 var app = builder.Build();
+app.UseMiddleware<ErrorHandlingMiddleware>();
 
 app.MapIdentityApi<User>();
 // Configure the HTTP request pipeline.