public async Task <FileContentResult> DownloadAsync(int year, int month)
{
try
{
var employeeErrors = new HashSet <string>();
var departments = _storage.GetDepartmentsAsync();
var departmentEmployees = new Dictionary <string, IList <Employee> >();
var fillTasks = new List <Task>();
await foreach (var employee in _storage.GetEmployeesAsync())
{
fillTasks.Add(FillSalaryAsync(employee, employeeErrors));
if (!departmentEmployees.ContainsKey(employee.DepartmentId))
{
departmentEmployees.Add(employee.DepartmentId, new List <Employee>());
}
departmentEmployees[employee.DepartmentId].Add(employee);
}
await Task.WhenAll(fillTasks);
var date = new DateTime(year, month, 1);
var report = _reportBuilder.Create(new DateTime(year, month, 1), await departments, departmentEmployees,
employeeErrors);
return(new FileContentResult(Encoding.UTF8.GetBytes(report), "application/octet-stream")
{
FileDownloadName = $"report_{date:yyyy-MM}.txt",
});
}
catch (Exception e)
{
_logger.LogError(e, $"error for {year}-{month}");
throw;
}
}