Implemented user logout and deletion service. Added Auth, Deletion and Logout hook. Restructed controllers

Moonlight.Api/Services/UserDeletionService.cs

@@ -0,0 +1,61 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Caching.Memory;
+using Moonlight.Api.Database;
+using Moonlight.Api.Database.Entities;
+using Moonlight.Api.Interfaces;
+
+namespace Moonlight.Api.Services;
+
+public class UserDeletionService
+{
+    private readonly DatabaseRepository<User> Repository;
+    private readonly IEnumerable<IUserDeletionHook> Hooks;
+    private readonly IMemoryCache Cache;
+
+    public UserDeletionService(DatabaseRepository<User> repository, IEnumerable<IUserDeletionHook> hooks, IMemoryCache cache)
+    {
+        Repository = repository;
+        Hooks = hooks;
+        Cache = cache;
+    }
+
+    public async Task<UserDeletionValidationResult> ValidateAsync(int userId)
+    {
+        var user = await Repository
+            .Query()
+            .FirstOrDefaultAsync(x => x.Id == userId);
+        
+        if(user == null)
+            throw new AggregateException($"User with id {userId} not found");
+        
+        var errorMessages = new List<string>();
+
+        foreach (var hook in Hooks)
+        {
+            if (await hook.ValidateAsync(user, errorMessages))
+                continue;
+            
+            return new UserDeletionValidationResult(false, errorMessages);
+        }
+        
+        return new UserDeletionValidationResult(true, []);
+    }
+
+    public async Task DeleteAsync(int userId)
+    {
+        var user = await Repository
+            .Query()
+            .FirstOrDefaultAsync(x => x.Id == userId);
+        
+        if(user == null)
+            throw new AggregateException($"User with id {userId} not found");
+        
+        foreach (var hook in Hooks)
+            await hook.ExecuteAsync(user);
+        
+        await Repository.RemoveAsync(user);
+        Cache.Remove(string.Format(UserAuthService.CacheKeyPattern, userId));
+    }
+}
+
+public record UserDeletionValidationResult(bool IsValid, IEnumerable<string> ErrorMessages);