private void NewAppointment()
{
// Case handler exception for adding an appointment
// on a datetime passed
if (monthCalendar.SelectionRange.Start.Date < System.DateTime.Now.Date)
{
MessageBox.Show("Error adding past appointments to the callendar", "Invalid date", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
AppointmentFrontEnd form = new AppointmentFrontEnd(monthCalendar.SelectionRange.Start);
form.ShowDialog();
if (form.Appointment == null)
{
return;
}
if (_Appointments.Count > 0)
{
foreach (IAppointment s_appointment in _Appointments)
{
// Case handler for overriding appointments
// that have the same time or date
// even a passed appointment
if (form.Appointment.ConflictExceptionHandler(s_appointment.Start, s_appointment.Length))
{
MessageBox.Show("There is an another appointment at current time ",
"Error adding current appointment",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
return;
}
}
}
// Saving the appointment via StreamReader
// in a txt file
_Appointments.Add(form.Appointment);
if (_Appointments.Save())
{
_TodaysAppointments.Add(form.Appointment);
panelDailyView.Invalidate();
}
}
// EDIT option of an appointment already booked in calendar
// preventing from all datetime exceptions
private void editToolStripMenuItem_Click(object sender, EventArgs e)
{
if (_SelectedAppointment is RecurringAppointment)
{
RecurringAppointment app = _SelectedAppointment as RecurringAppointment;
RecurringAppointmentFrontEnd form = new RecurringAppointmentFrontEnd(monthCalendar.SelectionRange.Start, app);
form.ShowDialog();
_Appointments.Remove(app);
_TodaysAppointments.Remove(app);
if (form.RecurringAppointment == null || form.RecurringAppointment == app)
{
return;
}
if (_Appointments.Count > 0)
{
foreach (IAppointment appointment in _Appointments)
{
if (form.RecurringAppointment.OccursOnTime(appointment.Start, appointment.Length))
{
MessageBox.Show("Date and Time already used at" + appointment.Start.ToLongDateString(),
"Cannot add current appointment",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
return;
}
}
}
_Appointments.Remove(app);
_TodaysAppointments.Remove(app);
_Appointments.Add(form.RecurringAppointment);
if (_Appointments.Save())
{
_TodaysAppointments.Add(form.RecurringAppointment);
panelDailyView.Invalidate();
}
}
if (_SelectedAppointment is Appointment)
{
Appointment app = _SelectedAppointment as Appointment;
AppointmentFrontEnd form = new AppointmentFrontEnd(monthCalendar.SelectionRange.Start, app);
form.ShowDialog();
if (form.Appointment == null || form.Appointment == app)
{
return;
}
if (_Appointments.Count > 0)
{
foreach (IAppointment appointment in _Appointments)
{
if (form.Appointment.TimeConflict(appointment.Start, appointment.Length))
{
MessageBox.Show("Date and Time already used",
"Cannot add current appointment",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
return;
}
}
}
_Appointments.Remove(app);
_TodaysAppointments.Remove(app);
_Appointments.Add(form.Appointment);
if (_Appointments.Save())
{
_TodaysAppointments.Add(form.Appointment);
panelDailyView.Invalidate();
}
}
}