// Load all elections from Backend and show them in Form
/// <summary>
/// Load all elections. Create <c>ElectionControl</c> objects for them and add them to the List of frontend elections
/// </summary>
/// <returns>A Task</returns>
public async Task LoadElections()
{
await WaitForElections();
foreach (TmpElectionObject election in this.elections)
{
ElectionControl electionControl = new ElectionControl();
electionControl.SetName(election.Name);
electionControl.SetId((int)election.Id);
electionControl.SetTimestamp("Start: " + UnixTimeStampToDateTime((double)election.StartTimestamp).ToString() + " "
+ "End: " + UnixTimeStampToDateTime((double)election.EndTimestamp).ToString());
frontendElections.Add(electionControl);
}
}
/// <summary>
/// Validates the picked election and sets the selected election in the backend.
/// Shows error messages to user if the input is wrong
/// </summary>
/// <returns>True if the method was successful
/// False if there was and error</returns>
public bool ValidatePick()
{
ElectionControl pickedElectionControl = null;
int checkedItems = 0;
foreach (ElectionControl ec in frontendElections)
{
if (ec.GetChecked())
{
checkedItems++;
pickedElectionControl = ec;
pickedElection = elections.Find(x => (x.Id == ec.GetId()));
}
}
if (checkedItems < 1)
{
MessageBox.Show("You have to pick an election");
return(false);
}
if (checkedItems > 1)
{
MessageBox.Show("You can only pick one election");
return(false);
}
// everything is oke. Set picked election ID in backend and return true
if (pickedElectionControl != null)
{
Backend.SetCurrentElection(pickedElectionControl.GetId());
return(true);
}
else
{
return(false);
}
}