/// <summary>
/// User calls this method to join a group. The group will be created if it doesn't exist.
/// </summary>
/// <param name="groupName"></param>
/// <returns></returns>
public async Task <Object> JoinGroup(string groupName)
{
if (groupName == null)
{
groupName = Guid.NewGuid().ToString();
}
;
string name = GetNameFromClaim();
// var group = context.Rooms.FirstOrDefault(e => e.RoomName == groupName);
//Add to in-memory group
await Groups.AddAsync(Context.ConnectionId, groupName);
// Retrieve room if it exists. If it doesn't it will be created in the future.
var group = context.Rooms.FirstOrDefault(e => e.RoomName == groupName);
// Retrieve user.
var user = context.Users.Include(u => u.ApplicationUserConversationRooms).SingleOrDefault(u => u.UserName == name);
//Is the user already a member of the group? In that case, return info message to user stating this.
if (user.ApplicationUserConversationRooms.FirstOrDefault(u => u.RoomName == groupName) != null)
{
return(Clients.User(Context.ConnectionId).SendAsync("addInfoMessageFromGroup", new[] { groupName, name + " is already a participant in group " + groupName }));
}
//Create Room
if (group == null)
{
group = new ConversationRoom()
{
RoomName = groupName
};
}
ApplicationUserConversationRoom sRCR = new ApplicationUserConversationRoom()
{
ApplicationUserId = user.Id,
ApplicationUser = user,
RoomName = groupName,
ConversationRoom = group
};
group.ApplicationUserConversationRooms.Add(sRCR);
context.ApplicationUserConversationRooms.Add(sRCR);
user.ApplicationUserConversationRooms.Add(sRCR);
await context.SaveChangesAsync();
return(Clients.Group(groupName).SendAsync("userAddedToGroup", new[] { name, groupName }));
}
/// <summary>
/// Add a new user to an existing groupchat.
/// </summary>
/// <param name="groupName"></param>
/// <param name="usernameToAdd"></param>
/// <returns></returns>
public async Task <Object> AddClientToGroup(string groupName, string usernameToAdd)
{
// Retrieve room if it exists.
var group = context.Rooms.FirstOrDefault(e => e.RoomName == groupName);
if (group == null)
{
return(Clients.Client(Context.ConnectionId).SendAsync("addInfoMessageFromGroup", new[] { groupName, groupName + "does not exist" }));
}
//Add user to in-memory group
foreach (var connectionId in _connections.GetConnections(usernameToAdd))
{
await Groups.AddAsync(connectionId, groupName);
}
// Retrieve user.
var user = context.Users.Include(u => u.ApplicationUserConversationRooms).SingleOrDefault(u => u.UserName == usernameToAdd);
//Is the user already a member of the group? In that case, return info message stating this.
if (user.ApplicationUserConversationRooms.FirstOrDefault(u => u.RoomName == groupName) != null)
{
return(Clients.Client(Context.ConnectionId).SendAsync("addInfoMessageFromGroup", new[] { groupName, usernameToAdd + " is already a participant in group " + groupName }));
}
ApplicationUserConversationRoom sRCR = new ApplicationUserConversationRoom()
{
ApplicationUserId = user.Id,
ApplicationUser = user,
RoomName = groupName,
ConversationRoom = group
};
group.ApplicationUserConversationRooms.Add(sRCR);
context.ApplicationUserConversationRooms.Add(sRCR);
user.ApplicationUserConversationRooms.Add(sRCR);
await context.SaveChangesAsync();
return(Clients.Group(groupName).SendAsync("userAddedToGroup", new[] { groupName, usernameToAdd }));
}
