public bool RemoveUserToChatGroupContact(int chatGroupId, int participantId)
{
try
{
using (var userContext = new UserContext())
{
var contacts = userContext.Contacts.Where(contact => contact is UserToGroupContact).ToList();
var dbChatGroup = userContext.ChatGroups.Where(cg => cg.Id == chatGroupId).FirstOrDefault();
var ownedFromDb = userContext.Users.Where(u => u.Id == participantId).FirstOrDefault();
UserToGroupContact uToGContact = null;
foreach (var contact in contacts)
{
uToGContact = contact as UserToGroupContact;
if (uToGContact.UserOwnerId == ownedFromDb.Id && uToGContact.ChatGroupId == chatGroupId)
{
userContext.Contacts.Remove(contact);
userContext.SaveChanges();
break;
}
}
return(true);
}
}
catch (Exception)
{
return(false);
}
}
public bool AddUserToChatGroupContact(int chatGroupId, int participantId)
{
try
{
using (UserContext userContext = new UserContext())
{
UserToGroupContact contact = new UserToGroupContact();
ChatGroup dbChatGroup = userContext.ChatGroups.Include("Participants").FirstOrDefault(chatGroup => chatGroup.Id == chatGroupId);
User ownedFromDb = userContext.Users.FirstOrDefault(dbUser => dbUser.Id == participantId);
contact.ChatGroup = dbChatGroup;
contact.UserOwner = ownedFromDb;
if (userContext.Contacts.FirstOrDefault(c => ((c.UserOwnerId == participantId) && ((c as UserToGroupContact).ChatGroupId == chatGroupId))) != null)
{
return(false);
}
userContext.Contacts.Add(contact);
userContext.SaveChanges();
ChatGroupUiInfo groupInfo = new ChatGroupUiInfo(dbChatGroup);
List <int> userIds = dbChatGroup.Participants.Select(c => c.UserOwnerId).ToList();
List <User> usersFromGroup = userContext.Users.Where(u => userIds.Contains(u.Id)).ToList();
foreach (User userToNotify in usersFromGroup)
{
AddNewContactCallback(groupInfo, userToNotify);
}
return(true);
}
}
catch (Exception)
{
return(false);
}
}
