protected override void OnAppearing()
{
App.Router.Subscribe<HubMessagePlaylistWasUpdated> ().OnSuccess ((ep, m) => {
tracks.Clear ();
foreach (var t in m.Playlist) {
tracks.Add (t);
}
currentTrack = m.PlayingTrack;
SetCurrentTrack ();
});
base.OnAppearing ();
}
private int comparePlaylistEntries(PlaylistEntry e1, PlaylistEntry e2)
{
return e1.Priority == e2.Priority ? e2.Id - e1.Id:
e2.Priority < e1.Priority ? -1: 1;
}
public PlaylistEntry QueueTrack(User user, Track track)
{
UpdateUserPriorities ();
if (!_usersActivities.ContainsKey (user.Id)) {
var newActivity = new UserActivitiesRecord () {
basePriority = 1.0,
activitiesCount = 0,
lastActivityTime = DateTime.Now
};
_usersActivities.Add (user.Id, newActivity);
}
var activitiesRecord = _usersActivities [user.Id];
if (activitiesRecord.activitiesCount++ == 0)
++_activeUsersCount;
var entry = new PlaylistEntry () {
User = user,
Track = track,
Id = _freeEntryId++,
LikesNum = 0,
DislikesNum = 0,
Priority = activitiesRecord.basePriority
};
activitiesRecord.basePriority *= Math.Pow (0.5, track.Duration.TotalMilliseconds / AVG_TRACK_LENGTH_MS);
_usersMarkedByEntryId.Add (entry.Id, new List<string> ());
_usersMarkedByEntryId [entry.Id].Add (user.Id);
Playlist.Add (entry);
Playlist.Sort (comparePlaylistEntries);
_playlistEntries.Add (entry);
if (!_playing)
Play ();
return entry;
}