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using Microsoft.Extensions.Options;
namespace IOL.GreatOffice.Api.Services;
public class ForgotPasswordService
{
private readonly AppDbContext _context;
private readonly MailService _mailService;
private readonly IOptions<AppConfiguration> _configuration;
private readonly ILogger<ForgotPasswordService> _logger;
public ForgotPasswordService(
AppDbContext context,
IOptions<AppConfiguration> configuration,
ILogger<ForgotPasswordService> logger,
MailService mailService
) {
_context = context;
_configuration = configuration;
_logger = logger;
_mailService = mailService;
}
public async Task<ForgotPasswordRequest> GetRequestAsync(Guid id, CancellationToken cancellationToken = default) {
var request = await _context.ForgotPasswordRequests
.Include(c => c.User)
.SingleOrDefaultAsync(c => c.Id == id, cancellationToken);
if (request == default) {
return default;
}
_logger.LogInformation($"Found forgot password request for user: {request.User.Username}, expires at {request.ExpirationDate} (in {request.ExpirationDate.Subtract(DateTime.UtcNow).Minutes} minutes).");
return request;
}
public async Task<bool> FullFillRequestAsync(Guid id, string newPassword, CancellationToken cancellationToken = default) {
var request = await GetRequestAsync(id, cancellationToken);
if (request == default) {
throw new ForgotPasswordRequestNotFoundException("Request with id: " + id + " was not found");
}
var user = _context.Users.SingleOrDefault(c => c.Id == request.User.Id);
if (user == default) {
throw new UserNotFoundException("User with id: " + request.User.Id + " was not found");
}
user.HashAndSetPassword(newPassword);
_context.Users.Update(user);
await _context.SaveChangesAsync(cancellationToken);
_logger.LogInformation($"Fullfilled forgot password request for user: {request.User.Username}");
await DeleteRequestsForUserAsync(user.Id, cancellationToken);
return true;
}
public async Task AddRequestAsync(User user, TimeZoneInfo requestTz, CancellationToken cancellationToken = default) {
await DeleteRequestsForUserAsync(user.Id, cancellationToken);
var request = new ForgotPasswordRequest(user);
_context.ForgotPasswordRequests.Add(request);
await _context.SaveChangesAsync(cancellationToken);
var portalUrl = _configuration.Value.PORTAL_URL;
var emailFromAddress = _configuration.Value.EMAIL_FROM_ADDRESS;
var emailFromDisplayName = _configuration.Value.EMAIL_FROM_DISPLAY_NAME;
var zonedExpirationDate = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(request.ExpirationDate, requestTz.Id);
var message = new MailMessage {
From = new MailAddress(emailFromAddress, emailFromDisplayName),
To = {
new MailAddress(user.Username)
},
Subject = "Time Tracker - Forgot password request",
Body = @$"
Hi {user.Username}
Go to the following link to set a new password.
{portalUrl}/#/reset-password?id={request.Id}
The link expires at {zonedExpirationDate:yyyy-MM-dd hh:mm}.
If you did not request a password reset, no action is required.
"
};
#pragma warning disable 4014
Task.Run(() => {
#pragma warning restore 4014
_mailService.SendMail(message);
_logger.LogInformation($"Added forgot password request for user: {request.User.Username}, expires in {request.ExpirationDate.Subtract(DateTime.UtcNow)}.");
},
cancellationToken);
}
public async Task DeleteRequestsForUserAsync(Guid userId, CancellationToken cancellationToken = default) {
var requestsToRemove = _context.ForgotPasswordRequests.Where(c => c.UserId == userId).ToList();
if (!requestsToRemove.Any()) return;
_context.ForgotPasswordRequests.RemoveRange(requestsToRemove);
await _context.SaveChangesAsync(cancellationToken);
_logger.LogInformation($"Deleted {requestsToRemove.Count} forgot password requests for user: {userId}.");
}
public async Task DeleteStaleRequestsAsync(CancellationToken cancellationToken = default) {
var deleteCount = 0;
foreach (var request in _context.ForgotPasswordRequests) {
if (!request.IsExpired) {
continue;
}
_context.ForgotPasswordRequests.Remove(request);
deleteCount++;
_logger.LogInformation($"Marking forgot password request with id: {request.Id} for deletion, expiration date was {request.ExpirationDate}.");
}
await _context.SaveChangesAsync(cancellationToken);
_logger.LogInformation($"Deleted {deleteCount} stale forgot password requests.");
}
}
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