public void SendNotification()
{
var name = Context.User.Identity.Name;
if (string.IsNullOrEmpty(name))
{
return;
}
//
// Azure table storage repositories
//
var connRepository = new ConnectionsRepository();
var notifyRepo = new NotificationsRepository();
if (!notifyRepo.Init())
{
return;
}
if (!connRepository.Init())
{
return;
}
var connections = connRepository.GetConnectionsByUserId(name).ToList();
var notifications = notifyRepo.GetNotificationsByUserId(name).ToList();
notifications.Sort();
if (connections.Count > 0 && notifications.Count > 0)
{
// Send notification(s) to each user connection.
foreach (var connection in connections)
{
foreach (var notification in notifications)
{
string json = System.Web.Helpers.Json.Encode(new
{
title = notification.Title,
message = notification.Message,
url = string.IsNullOrEmpty(notification.Url) ? string.Empty : notification.Url,
linkText = string.IsNullOrEmpty(notification.LinkText) ? string.Empty : notification.LinkText,
type = (int)notification.NotifyTypeInt,
notificationId = notification.RowKey
});
// Calls method on client side to show notification
Clients.Client(connection.RowKey).addNotification(json);
}
}
}
}
public override Task OnDisconnected(bool stopCalled)
{
string name = Context.User.Identity.Name;
var repository = new ConnectionsRepository();
if (repository.Init())
{
RemoveConnection(name, Context.ConnectionId, repository);
}
return(base.OnDisconnected(stopCalled));
}
public void RemoveConnection(string name, string connectionId, ConnectionsRepository repo)
{
if (!repo.Init())
{
return;
}
if (!string.IsNullOrEmpty(name))
{
repo.RemoveConnection(name, connectionId);
// Just in case user has old connections in table
RemoveOldUserConnections(name, 1, repo);
// TODO testing only
//var connections = repo.GetAllConnections();
}
}
public override Task OnConnected()
{
var name = Context.User.Identity.Name;
if (!string.IsNullOrEmpty(name))
{
var repository = new ConnectionsRepository();
if (repository.Init())
{
var connection = new ConnectionModel(name, Context.ConnectionId, DateTime.Now);
repository.AddConnection(connection);
// TODO testing only
//var connections = repository.GetAllConnections();
}
}
return(base.OnConnected());
}
public void RemoveOldUserConnections(string who, int daysOld, ConnectionsRepository repo)
{
if (!repo.Init())
{
return;
}
var connections = repo.GetConnectionsByUserId(who).ToList();
var timeSpan = TimeSpan.FromDays(daysOld);
var dateTimeOffset = DateTime.Now.Subtract(timeSpan);
foreach (var connection in connections)
{
// Remove connection if older that 'daysOld'
if (connection.ConnectionTimeStamp <= dateTimeOffset)
{
RemoveConnection(connection.PartitionKey, connection.RowKey, repo);
}
}
}