Added ASP.NET backend with SQLite

backend/MuiCharts.Api/Controllers/ApiControllerBase.cs

@@ -0,0 +1,57 @@
+using ErrorOr;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+
+namespace MuiCharts.Api.Controllers;
+
+/// <summary>
+/// Base class for API controllers that provides common functionality and error handling.
+/// </summary>
+/// <typeparam name="T">The type of the derived controller.</typeparam>
+[ApiController]
+[Route("[controller]")]
+public abstract class ApiControllerBase<T>(ILogger<T> logger)
+	: ControllerBase where T : ApiControllerBase<T>
+{
+	/// <summary>
+	/// Gets the logger instance used for logging.
+	/// </summary>
+	protected ILogger<T> Logger { get; } = logger;
+
+	/// <summary>
+	/// Handles the response for a list of errors.
+	/// </summary>
+	/// <param name="errors">The list of errors.</param>
+	/// <returns>An <see cref="IActionResult"/> representing the response.</returns>
+	protected IActionResult Problem(List<Error> errors)
+	{
+		if (errors.All(error => error.Type == ErrorType.Validation))
+		{
+			ModelStateDictionary modelState = new();
+
+			foreach (Error error in errors)
+				modelState.AddModelError(error.Code, error.Description);
+
+			return ValidationProblem(modelState);
+		}
+
+		Error firstError = errors[0];
+
+		Logger.LogError("An error occured during request processing: {Error}", firstError);
+
+		int statusCode = firstError.Type switch
+		{
+			ErrorType.Validation => StatusCodes.Status400BadRequest,
+			ErrorType.Unauthorized => StatusCodes.Status401Unauthorized,
+			ErrorType.Forbidden => StatusCodes.Status403Forbidden,
+			ErrorType.NotFound => StatusCodes.Status404NotFound,
+			ErrorType.Conflict => StatusCodes.Status409Conflict,
+			_ => StatusCodes.Status500InternalServerError
+		};
+
+		return Problem(
+			statusCode: statusCode,
+			detail: firstError.Description
+		);
+	}
+}