/// <summary>
/// Deletes a user from the database.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DeleteButton_Click(object sender, RoutedEventArgs e)
{
UserObject user = new UserObject();
user = businessLogicLayer.CheckUserDelete(firstNameInput.Text.ToLower(), lastNameInput.Text.ToLower(), long.Parse(telephoneInput.Text.ToLower()), emailInput.Text.ToLower(),
roleInput.Text.ToLower());
try
{
if ((firstNameInput.Text.Equals("")) || (lastNameInput.Text.Equals("")) || (telephoneInput.Text.Equals("")) || (emailInput.Text.Equals("")) || (roleInput.Text.Equals("")))
{
MessageBox.Show("Please input all text boxes.");
firstNameInput.Focus();
return;
}
else if ((!Regex.IsMatch(firstNameInput.Text, @"^[a-zA-Z]+$")) || (!Regex.IsMatch(lastNameInput.Text, @"^[a-zA-Z]+$")))
{
MessageBox.Show("Please input only alphabetical characters for the first and last name text boxes");
firstNameInput.Focus();
return;
}
else if (!Regex.IsMatch(telephoneInput.Text, "^[0-9]{11}$"))
{
MessageBox.Show("Please input only 11 numerical characters in the telephone text box.");
telephoneInput.Focus();
return;
}
// Official Microsoft email regex: https://github.com/Microsoft/referencesource/blob/master/System.ComponentModel.DataAnnotations/DataAnnotations/EmailAddressAttribute.cs
else if (!Regex.IsMatch(emailInput.Text, @"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$"))
{
MessageBox.Show("Please input a valid email address.");
emailInput.Focus();
return;
}
else if (!(roleInput.Text.ToLower().Equals("worker") || roleInput.Text.ToLower().Equals("manager") || roleInput.Text.ToLower().Equals("admin")))
{
MessageBox.Show("Please input only 'worker', 'manager' or 'admin' in the role text box.");
roleInput.Focus();
return;
}
else if (!(firstNameInput.Text.ToLower().Equals(user.email) || lastNameInput.Text.ToLower().Equals(user.email) || telephoneInput.Text.ToLower().Equals(user.email) ||
emailInput.Text.ToLower().Equals(user.email) || roleInput.Text.ToLower().Equals(user.email)))
{
MessageBox.Show("A user with these details does not exist.");
emailInput.Focus();
return;
}
else
{
user = businessLogicLayer.DeleteCurrentUser(firstNameInput.Text.ToLower(), lastNameInput.Text.ToLower(), long.Parse(telephoneInput.Text),
emailInput.Text.ToLower(), roleInput.Text.ToLower());
MessageBox.Show(firstNameInput.Text + " " + lastNameInput.Text + " has been deleted from the system.");
}
}
catch (Exception ex)
{
MessageBox.Show("An error has occurred, please contact your administrator." + "\n\n" + "The error message is: " + "\n\n" + ex.ToString());
}
}