public int Add(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
/// User remapping is done here because EF didn't recognize conversation users as
/// same object as ones in the context so it created duplicate entries.
/// Atm I had no time to find a better solution.
Conversation newConversation = new Conversation();
foreach (var participant in conversation.Participants)
{
var user = context.Users.Find(participant.Id);
if (user != null)
newConversation.Participants.Add(user);
}
context.Conversations.Add(newConversation);
context.SaveChanges();
return newConversation.Id;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return -1;
}
}
}
public bool Update(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
context.Conversations.Remove(context.Conversations.Find(conversation.Id));
context.Conversations.Add(conversation);
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Exists(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
bool isEqual;
foreach (var c in context.Conversations.ToList())
{
isEqual = new HashSet<User>(c.Participants.ToList()).SetEquals(conversation.Participants.ToList());
if (isEqual)
return true;
}
return false;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Exists(Conversation conversation)
{
return _conversationDao.Exists(conversation);
}
public bool Update(Conversation conversation)
{
return _conversationDao.Update(conversation);
}
public int Add(Conversation conversation)
{
return _conversationDao.Add(conversation);
}