/// <summary>
/// Start logic to delete booking entry
/// </summary>
/// <param name="title">title of training</param>
public void DeleteBookingEntry(string title)
{
//get selected Training
Training training = trainingLogic.GetSelectedTraining(title);
//get current booking entries
Dictionary <string, TrainingStatus> currentBookingList = db.GetTrainingBooking(Global.employee.Id);
if (training != null)
{
//Check if training, which is supposed to be deleted, is an requirement for an already booked training. If so, don't delete it
List <Training> trainings = db.GetTrainingToRequirement(title);
List <string> trainingWithTitleAsReq = new List <string>();
if (trainings.Count > 0)
{
foreach (var tmp_training in trainings)
{
if (currentBookingList.ContainsKey(tmp_training.Title))
{
trainingWithTitleAsReq.Add(tmp_training.Title);
}
}
//check if such trainings were found. If so, generate an error message containing thos trainings and throw an exception
if (trainingWithTitleAsReq.Count > 0)
{
StringBuilder errorMessage = new StringBuilder();
errorMessage.Append("This training is a requirement for following trainings and thus can not be deleted. Training/s: \n");
foreach (string tmp_title in trainingWithTitleAsReq)
{
errorMessage.Append(tmp_title + "\n");
}
throw new TrainingPlatformException(errorMessage.ToString());
}
}
try
{
currentBookingList.Remove(title);
}
catch (Exception ex)
{
Debug.Fail($"DeleteBookingEntry: {ex.Message}");
}
//Delete booking entry of selected training
db.DeleteTrainingBookingEntryOfEmployee(Global.employee.Id, training.Id);
Global.employee.TrainingBooking = db.GetTrainingBooking(Global.employee.Id);
}
else
{
Debug.Fail($"Selected training with title '{title}' could not be found.");
throw new TrainingPlatformException("The selected training could not be deleted. Please try again or contact an administrator.");
}
}
/// <summary>
/// Get trainings which have given training as requirement
/// </summary>
/// <param name="requirement">Title of requirement</param>
/// <returns>List with all trainings that have given training as requirement</returns>
public List <Training> GetTrainingToRequirement(string requirement)
{
List <Training> trainings = db.GetTrainingToRequirement(requirement);
return(trainings);
}
