/// <summary>
/// Sets everything up, like a constructor sort of
/// </summary>
public static void Create()
{
// Create dictionary
airports = new Dictionary <string, Coordinate>();
// Check database for old entries
// (compares flight infos with notifications)
using (var context = new ApplicationDbContext())
{
// Create local copy so we can iterate it while deleting from database
var notifications = context.FlightNotifications;
// Check notifications
foreach (var notification in notifications)
{
if (!context.FlightInfos.Any(f => f.Id == notification.FlightId))
{
context.FlightNotifications.Remove(notification);
}
}
// Save changes and log results
var changes = context.SaveChanges();
if (changes > 0)
{
Console.WriteLine($"Removed {changes} invalid {(changes == 1 ? "notification" : "notifications")}");
}
}
// Crate web socket deliverer
WebSocketDeliverer.Create();
}
/// <summary>
/// Update and check if any notifications should be sent
/// </summary>
/// <param name="infos"></param>
public static void Update(FlightInfo[] infos)
{
using (var context = new ApplicationDbContext())
{
// Shorthand
var notifications = context.FlightNotifications;
// If it's empty, just return
if (!notifications.Any())
{
return;
}
// Update airport cache
UpdateAirportCache(notifications);
// Loop through notifications to try and find matches
foreach (var notification in notifications)
{
// If already notified, ignore
if (notification.Notified)
{
continue;
}
// Get flight info
var info = infos.FirstOrDefault(f => f.Id == notification.FlightId);
// If info not found, continue loop (instead of crashing)
if (info == null)
{
continue;
}
// Get time remaining
var distance = Maps.GetDistance(new Coordinate(info.Longitude, info.Latitude), airports[info.DestinationId]) / 1000f;
var hours = distance / info.SpeedKm;
// See if we should remind
if (hours < 1)
{
WebSocketDeliverer.Send(notification.Username, notification.FlightId);
notification.Notified = true;
}
}
// Save changes
context.SaveChanges();
}
}
