Added hopframe backend

SpotiParty.Web/Services/DashboardAuthHandler.cs

@@ -0,0 +1,37 @@
+using HopFrame.Core.Services;
+using Microsoft.EntityFrameworkCore;
+
+namespace SpotiParty.Web.Services;
+
+public class DashboardAuthHandler(ClientSideStorage storage, IDbContextFactory<DatabaseContext> contextFactory) : IHopFrameAuthHandler {
+
+    public const string AdminPolicy = "ADMIN";
+    
+    public async Task<bool> IsAuthenticatedAsync(string? policy) {
+        var token = storage.GetUserToken();
+        if (string.IsNullOrWhiteSpace(token))
+            return false;
+
+        await using var context = await contextFactory.CreateDbContextAsync();
+        var user = await context.Users.AsNoTracking().FirstOrDefaultAsync(u => u.RefreshToken == token);
+        if (user is null) return false;
+
+        if (policy == AdminPolicy) {
+            return user.IsAdmin;
+        }
+
+        return true;
+    }
+    
+    public async Task<string> GetCurrentUserDisplayNameAsync() {
+        var token = storage.GetUserToken();
+        if (string.IsNullOrWhiteSpace(token))
+            return string.Empty;
+        
+        await using var context = await contextFactory.CreateDbContextAsync();
+        var user = await context.Users.AsNoTracking().FirstOrDefaultAsync(u => u.RefreshToken == token);
+        if (user is null) return string.Empty;
+
+        return user.DisplayName;
+    }
+}