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using System.Runtime.Serialization;
using System.Security.Claims;
using System.Text.Json;
using Elements.Data;
using Elements.Data.Models;
using Google.Apis.Auth;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
namespace Elements.Backend.Controllers;
[ApiController]
[Route("[controller]/[action]")]
public class AuthController : ControllerBase
{
private readonly IConfiguration _config;
private readonly ApplicationDbContext _dbContext;
public AuthController(IConfiguration config, ApplicationDbContext dbContext)
{
_config = config;
_dbContext = dbContext;
}
public class LoginModel
{
public required string GoogleToken { get; init; }
}
[HttpPost]
public async Task<IActionResult> Login([FromBody] LoginModel model)
{
GoogleJsonWebSignature.Payload? payload = await VerifyGoogleIdToken(model.GoogleToken);
if (payload == null)
return Unauthorized();
User? user = await _dbContext.Users.SingleOrDefaultAsync(u => u.GoogleId == payload.Subject);
if (user != null)
{
//Check if user's name changed and update if it did
if (user.Name != payload.Name)
user.Name = payload.Name;
}
else
{
user = new User()
{
Name = payload.Name,
GoogleId = payload.Subject
};
await _dbContext.Users.AddAsync(user);
}
await _dbContext.SaveChangesAsync();
List<Claim> claims = new()
{
new Claim("id", user.Id.ToString()),
new Claim(ClaimTypes.Role, "User")
};
ClaimsIdentity claimsIdentity = new(claims, CookieAuthenticationDefaults.AuthenticationScheme);
AuthenticationProperties authProperties = new()
{
IsPersistent = true,
AllowRefresh = true
};
await HttpContext.SignInAsync(
CookieAuthenticationDefaults.AuthenticationScheme,
new ClaimsPrincipal(claimsIdentity),
authProperties);
var response = new
{
Id = user.Id.ToString()
};
var serializeOptions = new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
return Ok(JsonSerializer.Serialize(response, serializeOptions));
}
[HttpPost]
public async Task<IActionResult> Logout()
{
await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
return Ok();
}
private async Task<GoogleJsonWebSignature.Payload?> VerifyGoogleIdToken(string token)
{
try
{
GoogleJsonWebSignature.Payload? payload = await GoogleJsonWebSignature.ValidateAsync(token);
return payload;
}
catch (InvalidJwtException)
{
return null;
}
}
}
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