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using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Identity;
using Newtonsoft.Json;
using DotNetGigs.Models.Entities;
using DotNetGigs.Models;
using DotNetGigs.Auth;
using Microsoft.Extensions.Options;
using System.Threading.Tasks;
using DotNetGigs.Helpers;
using System.Security.Claims;
using System.Linq;
namespace DotNetGigs.Controllers
public class AuthController : Controller
private readonly UserManager<AppUser> _userManager;
private readonly IJwtFactory _jwtFactory;
private readonly JsonSerializerSettings _serializerSettings;
private readonly JwtIssuerOptions _jwtOptions;
public AuthController(UserManager<AppUser> userManager, IJwtFactory jwtFactory, IOptions<JwtIssuerOptions> jwtOptions)
_userManager = userManager;
_jwtFactory = jwtFactory;
_jwtOptions = jwtOptions.Value;
_serializerSettings = new JsonSerializerSettings
Formatting = Formatting.Indented
// POST api/auth/login
public async Task<IActionResult> Post([FromBody]CredentialsViewModel credentials)
if (!ModelState.IsValid)
return BadRequest(ModelState);
var identity = await GetClaimsIdentity(credentials.UserName, credentials.Password);
if (identity == null)
return BadRequest(Errors.AddErrorToModelState("login_failure", "Invalid username or password.", ModelState));
// Serialize and return the response
var response = new
auth_token = await _jwtFactory.GenerateEncodedToken(credentials.UserName, identity),
expires_in = (int)_jwtOptions.ValidFor.TotalSeconds
var json = JsonConvert.SerializeObject(response, _serializerSettings);
return new OkObjectResult(json);
private async Task<ClaimsIdentity> GetClaimsIdentity(string userName, string password)
if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password))
// get the user to verifty
var userToVerify = await _userManager.FindByNameAsync(userName);
if (userToVerify != null)
// check the credentials
if (await _userManager.CheckPasswordAsync(userToVerify, password))
return await Task.FromResult(_jwtFactory.GenerateClaimsIdentity(userName,userToVerify.Id));
// Credentials are invalid, or account doesn't exist
return await Task.FromResult<ClaimsIdentity>(null);