public DirectChat CreateDirectChat(string participant1, string participant2)
{
var chat = GetDirectChat(participant1, participant2);
if (chat != null)
{
throw new ChatAlreadyExistException();
}
chat = new DirectChat()
{
ChatMembers = new List <ChatMember>()
};
_chatRepo.Add(chat);
chat.ChatMembers.Add(new ChatMember()
{
Chat = chat,
User = _userRepo.GetOne(participant1)
});
chat.ChatMembers.Add(new ChatMember()
{
Chat = chat,
User = _userRepo.GetOne(participant2)
});
_chatRepo.Save(chat);
return(chat);
}