finalizare 1.0

frontend/CustomAuthenticationStateProvider.cs

@@ -0,0 +1,47 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Threading.Tasks;
+using Blazored.LocalStorage;
+using Microsoft.AspNetCore.Components.Authorization;
+
+namespace HealthcareManagerUiWebAssem;
+
+public class CustomAuthenticationStateProvider(ILocalStorageService localStorageService) : AuthenticationStateProvider
+{
+    public override async Task<AuthenticationState> GetAuthenticationStateAsync()
+    {
+        var token = await localStorageService.GetItemAsync<string>("authToken");
+
+        if (string.IsNullOrEmpty(token))
+            return new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity()));
+
+        var claims = ParseClaimsFromJwt(token);
+        var identity = new ClaimsIdentity(claims, "jwt", null, "role");
+
+        var user = new ClaimsPrincipal(identity);
+
+        return new AuthenticationState(user);
+    }
+
+    public void NotifyUserAuthentication(string token)
+    {
+        var claims = ParseClaimsFromJwt(token);
+        var authenticatedUser = new ClaimsPrincipal(new ClaimsIdentity(claims, "jwt", null, "role"));
+        var authState = Task.FromResult(new AuthenticationState(authenticatedUser));
+
+        NotifyAuthenticationStateChanged(authState);
+    }
+
+    public void NotifyUserLogout()
+    {
+        var authState = Task.FromResult(new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity())));
+        NotifyAuthenticationStateChanged(authState);
+    }
+
+    private IEnumerable<Claim> ParseClaimsFromJwt(string jwt)
+    {
+        var handler = new JwtSecurityTokenHandler();
+        var token = handler.ReadJwtToken(jwt);
+        return token.Claims;
+    }
+}