added basic functionalities (login, create/del/rename pages)

Tagger/Service/CustomAuthStateProvider.cs

@@ -0,0 +1,38 @@
+using Microsoft.AspNetCore.Components.Authorization;
+using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage;
+using System.Security.Claims;
+
+namespace Tagger.Service;
+
+public class CustomAuthStateProvider : AuthenticationStateProvider
+{
+    private readonly ProtectedSessionStorage SessionStorage;
+    private ClaimsPrincipal Anonymous = new(new ClaimsIdentity());
+
+    public CustomAuthStateProvider(ProtectedSessionStorage sessionStorage)
+    {
+        SessionStorage = sessionStorage;
+    }
+
+    public override async Task<AuthenticationState> GetAuthenticationStateAsync()
+    {
+        var userSessionStorageResult = await SessionStorage.GetAsync<User>(nameof(User));
+        
+        if(!userSessionStorageResult.Success || userSessionStorageResult.Value is null)
+            return new AuthenticationState(Anonymous);
+
+        var claimPrincipal = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim>
+        {
+            new Claim(ClaimTypes.Name, userSessionStorageResult.Value.Name)
+        }));
+        return new(claimPrincipal);
+    }
+
+    public async Task SetSession(User? user)
+    {
+        if(user is null)
+            await SessionStorage.DeleteAsync(nameof(User));
+        else
+            await SessionStorage.SetAsync(nameof(User), user);
+    }
+}