public void CreateMessage(int fromID, int toID, string dateString, string subject, string text, byte[] pictureBytes)
{
var users = _userDAO.GetUsers();
var ids = new List <int>();
foreach (var user in users)
{
ids.Add(user.UserID);
}
if (!IsValidID(fromID, ids))
{
throw new ArgumentException("No such ID found (from).");
}
else if (!IsValidID(toID, ids))
{
throw new ArgumentException("No such ID found (to).");
}
else if (dateString == null || !IsValidDate(dateString))
{
throw new ArgumentException("Wrong date definition. It also cannot be empty.");
}
else if (subject != null && subject.Length > 50)
{
throw new ArgumentException("The maximum length must be 50 characters or below.");
}
else if (text == null)
{
throw new ArgumentException("It cannot be empty.");
}
else if (pictureBytes != null && !IsValidImage(pictureBytes))
{
throw new ArgumentException("Incorrect file which cannot be converted into an image.");
}
else
{
DateTime date = DateTime.ParseExact(dateString, "dd.MM.yyyy hh:mm", CultureInfo.InvariantCulture, DateTimeStyles.None);
_messageDAO.CreateMessage(fromID, toID, date, subject, text, pictureBytes);
}
}
