/// <summary>
/// Retrieve the recent uploads for a username and perform business logic to check existence.
/// Retries operation when there is an exception and logs all actions.
/// </summary>
/// <param name="username">Username of profile score to fetch.</param>
/// <param name="pagination">Pagination for the operation. Starts at 0.</param>
/// <param name="ipAddress">Ipaddress for logging.</param>
/// <param name="failureCount">Current failure count of the operation.</param>
/// <param name="ex">Exception that is thrown.</param>
/// <returns>List of UploadResult</returns>
public async Task <List <UploadResult> > GetRecentUploadsAsync(string username, int pagination, string ipAddress, int failureCount, Exception ex)
{
// Escape condition for recursive call if exception is thrown.
if (failureCount >= Constants.OperationRetry)
{
throw ex;
}
// List of uploads to return.
var recentUploads = new List <UploadResult>();
try
{
// Check that the user exists.
var userExists = await _userManagementService.CheckUserExistenceAsync(username).ConfigureAwait(false);
if (!userExists)
{
throw new ArgumentException(Constants.UsernameDNE);
}
// Perform operation.
recentUploads = await _uploadService.GetRecentByUploaderAsync(username, pagination).ConfigureAwait(false);
}
catch (Exception e)
{
// Log everytime we catch an exception.
await _loggingManager.LogAsync(DateTime.UtcNow.ToString(Constants.LoggingFormatString),
Constants.GetRecentUploadsOperation, username, ipAddress, e.ToString()).ConfigureAwait(false);
// Retry operation Constant.OperationRetry amount of times when there is exception.
await GetRecentUploadsAsync(username, pagination, ipAddress, ++failureCount, e);
}
// Operation successfull, log that operation.
await _loggingManager.LogAsync(DateTime.UtcNow.ToString(Constants.LoggingFormatString),
Constants.GetRecentUploadsOperation, username, ipAddress).ConfigureAwait(false);
return(recentUploads);
}