private static int comparePlaylistEntries(PlaylistEntry e1, PlaylistEntry e2)
{
return Math.Abs(e1.Priority - e2.Priority) < 0.001
? e2.Id - e1.Id
: e2.Priority < e1.Priority ? -1 : 1;
}
public PlaylistEntry QueueTrack(HubblUser 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;
}
