Progress Overhaul + Profile Page and a LOT more! (#4262)

Co-authored-by: Amelia <77553571+Fesaa@users.noreply.github.com>
Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/Controllers/BaseApiController.cs

@@ -1,5 +1,7 @@
-using Microsoft.AspNetCore.Authorization;
+using API.Services.Store;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace API.Controllers;
 
@@ -10,8 +12,23 @@ namespace API.Controllers;
 [Authorize]
 public class BaseApiController : ControllerBase
 {
-    public BaseApiController()
-    {
+    private IUserContext? _userContext;
 
-    }
+    /// <summary>
+    /// Gets the current user context. Available in all derived controllers.
+    /// </summary>
+    protected IUserContext UserContext =>
+        _userContext ??= HttpContext.RequestServices.GetRequiredService<IUserContext>();
+
+    /// <summary>
+    /// Gets the current authenticated user's ID.
+    /// Throws if user is not authenticated.
+    /// </summary>
+    protected int UserId => UserContext.GetUserIdOrThrow();
+
+    /// <summary>
+    /// Gets the current authenticated user's username.
+    /// </summary>
+    /// <remarks>Warning! Username's can contain .. and /, do not use folders or filenames explicitly with the Username</remarks>
+    protected string? Username => UserContext.GetUsername();
 }