public override void AddMessage(DateTime time, List<int> users, int author, string message)
{
using (DataEntities ctx = new DataEntities())
{
if (ctx.users.FirstOrDefault(u => u.user_id == author) == null)
{
throw new UserNotExistingException();
}
foreach (int id in users)
{
if (ctx.users.FirstOrDefault(u => u.user_id == id) == null)
{
throw new UserNotExistingException();
}
}
message msg = new message
{
author_id = author,
time = time,
message1 = message
};
foreach (int id in users)
{
msg.users.Add(ctx.users.FirstOrDefault(u => u.user_id == id));
}
ctx.messages.Add(msg);
ctx.SaveChanges();
}
}
private Message Convert(message m)
{
return new Message(m.message_id, m.time, m.users.Select(u => u.user_id).ToList(), m.author_id, m.message1);
}