/// <summary>
/// This function is asynchronous, since the retrieval takes some time.
/// This function retrievs
/// </summary>
/// <param name="filterValue">Filter can be Employee Id or Name.
/// In case th</param>
/// <returns>List of Employee records</returns>
public async Task GetEmployeesAsync(string filterValue = "")
{
Task <List <Employee> > retrievalTask;
List <Employee> _retrievedEmployees = new List <Employee>();
try
{
switch (_searchFilter)
{
case SearchFilter.NoFilter:
//implement only page wise retrieval of employess and show the first page
retrievalTask = Task.Run(() => _employeeQueryHandler.GetEmployeesAsync());
await retrievalTask;
_retrievedEmployees = retrievalTask.Result;
break;
case SearchFilter.ByEmployeeId:
int.TryParse(filterValue, out int employeeId);
Employee rerievedEmployee = _employeeQueryHandler.GetEmployeeById(employeeId);
if (rerievedEmployee != null)
{
_retrievedEmployees.Add(rerievedEmployee);
}
break;
case SearchFilter.ByEmployeeName:
retrievalTask = Task.Run(() => _employeeQueryHandler.GetEmployeesByNameAsync(filterValue));
await retrievalTask;
_retrievedEmployees = retrievalTask.Result;
break;
case SearchFilter.ByPageNumber:
int.TryParse(filterValue, out int pageToRetrieve);
retrievalTask = Task.Run(() => _employeeQueryHandler.GetEmployeesByPageAsync(pageToRetrieve));
await retrievalTask;
_retrievedEmployees = retrievalTask.Result;
TotalNoOfPages = _employeeQueryHandler.ToTalNoOfPages;
break;
default:
break;
}
}
catch (Exception ec)
{
_messageToUserEventArgs.IsOperationSucceeded = false;
_messageToUserEventArgs.MessageToShow = ec.Message;
ShowMessageToUserEvent?.Invoke(this, _messageToUserEventArgs);
}
RetrievedEmployees = _retrievedEmployees;
return;
}
/// <summary>
/// This function takes care of adding, modifying and making inactive the employ record
/// </summary>
/// <returns></returns>
public bool UpdateEmployee()
{
Mouse.OverrideCursor = Cursors.Wait;
bool isEmployeeUpdated = false;
string msgToShow = string.Empty;
try
{
string updatedTime = DateTimeOffset.Now.ToString("yyyy-MM-dd'T'HH:mm:ssK");
_employeeToProcess.UpdatedAt = updatedTime;
switch (_updateType)
{
case UpdateType.AddEmployee:
_employeeToProcess.Status = "Active";
_employeeToProcess.CreatedAt = updatedTime;
_employeeToProcess = _employeeUpdateHandler.AddEmployee(_employeeToProcess);
isEmployeeUpdated = (_employeeToProcess.Id > 0);
break;
case UpdateType.EditEmployee:
isEmployeeUpdated = _employeeUpdateHandler.EditEmployee(_employeeToProcess);
break;
case UpdateType.RemoveEmployee:
_employeeToProcess.Status = "Inactive";
isEmployeeUpdated = _employeeUpdateHandler.RemoveEmployee(_employeeToProcess.Id);
break;
}
_messageToUserEventArgs.IsOperationSucceeded = isEmployeeUpdated;
ShowMessageToUserEvent?.Invoke(this, _messageToUserEventArgs);
if (isEmployeeUpdated)
{
//create a new employee object
_employeeToProcess = new Employee();
ClearView();
}
}
catch (Exception ec)
{
_messageToUserEventArgs.IsOperationSucceeded = false;
_messageToUserEventArgs.MessageToShow = ec.Message;
ShowMessageToUserEvent?.Invoke(this, _messageToUserEventArgs);
}
Mouse.OverrideCursor = null;
return(isEmployeeUpdated);
}