after refactor cleanup

DiunaBI.API/Services/GoogleAuthService.cs

@@ -0,0 +1,60 @@
+using DiunaBI.Domain.Entities;
+using DiunaBI.Infrastructure.Data;
+using Google.Apis.Auth;
+using Microsoft.EntityFrameworkCore;
+
+namespace DiunaBI.API.Services;
+
+public class GoogleAuthService(AppDbContext context, IConfiguration configuration, ILogger<GoogleAuthService> logger)
+{
+    private readonly AppDbContext _context = context;
+    private readonly IConfiguration _configuration = configuration;
+    private readonly ILogger<GoogleAuthService> _logger = logger;
+
+    public async Task<(bool IsValid, User? user, string? error)> ValidateGoogleTokenAsync(string idToken)
+    {
+        try
+        {
+            var clientId = _configuration["GoogleAuth:ClientId"];
+            if (string.IsNullOrEmpty(clientId))
+            {
+                _logger.LogError("Google Auth Client Id is not configured");
+                return (false, null, "Google Auth Client Id is not configured");
+            }
+
+            var payload = await GoogleJsonWebSignature.ValidateAsync(idToken,
+                new GoogleJsonWebSignature.ValidationSettings
+                {
+                    Audience = new[] { clientId }
+                });
+
+            _logger.LogInformation("Google token validated for user: {Email}", payload.Email);
+            
+            var user = await _context.Users
+                .FirstOrDefaultAsync(x => x.Email == payload.Email);
+
+            if (user == null)
+            {
+                _logger.LogError("User not found in DiunaBI database: {Email}", payload.Email);
+                return (false, null, "User not found in DiunaBI database");
+            }
+            
+            user.UserName = payload.Name;
+            
+            await _context.SaveChangesAsync();
+            
+            _logger.LogInformation("User logged in: {Email}", payload.Email);
+            
+            return (true, user, null);
+        }
+        catch (InvalidJwtException ex)
+        {
+            _logger.LogError(ex, "Invalid JWT token");
+            return (false, null, "Invalid JWT token");
+        } catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error validating Google token");
+            return (false, null, "Error validating Google token");
+        }
+    }
+}