private async Task <ParatextAccessLock> GetParatextAccessLock(string userId)
{
SemaphoreSlim semaphore = _tokenRefreshSemaphores.GetOrAdd(userId, (string key) => new SemaphoreSlim(1, 1));
await semaphore.WaitAsync();
try
{
Attempt <UserSecret> attempt = await _userSecretRepository.TryGetAsync(userId);
if (!attempt.TryResult(out UserSecret userSecret))
{
throw new DataNotFoundException("Could not find user secrets for " + userId);
}
if (!userSecret.ParatextTokens.ValidateLifetime())
{
Tokens refreshedUserTokens = await _jwtTokenHelper.RefreshAccessTokenAsync(_paratextOptions.Value, userSecret.ParatextTokens, _registryClient);
userSecret = await _userSecretRepository.UpdateAsync(userId, b => b.Set(u => u.ParatextTokens, refreshedUserTokens));
}
return(new ParatextAccessLock(semaphore, userSecret));
}
catch
{
// If an exception is thrown between awaiting the semaphore and returning the ParatextAccessLock, the
// caller of the method will not get a reference to a ParatextAccessLock and can't release the semaphore.
semaphore.Release();
throw;
}
}
private async Task RefreshAccessTokenAsync(UserSecret userSecret)
{
ParatextOptions options = _paratextOptions.Value;
userSecret.ParatextTokens = await _jwtTokenHelper.RefreshAccessTokenAsync(options,
userSecret.ParatextTokens, _registryClient);
await _userSecretRepository.UpdateAsync(userSecret, b =>
b.Set(u => u.ParatextTokens, userSecret.ParatextTokens));
}