/// <summary>Loads the specified <see cref="MDBPlayListItem"/>.</summary>
/// <param name="mdb">The <see cref="MusicDataBase"/> instance.</param>
/// <param name="item">The <see cref="MDBPlayListItem"/>.</param>
/// <returns></returns>
public static MDBFileSelection Load(MusicDataBase mdb, MDBPlayListItem item)
{
var result = new MDBFileSelection();
result.AudioFile = mdb.AudioFiles.TryGetStruct(item.AudioFileID);
result.File = mdb.Files.TryGetStruct(result.AudioFile.FileID);
result.NowPlaying = MDBNowPlaying.Create(mdb, item.StreamID, item.OwnerID, item.SubsetID, DateTime.MinValue, result.AudioFile);
result.PlayListItem = item;
return(result);
}
public void AddToPlaylist(WebData webData, long audioFileID, long streamID = 0)
{
if (streamID == 0)
{
streamID = (long)MDBStreamType.JukeBob;
}
lock (mdb.PlayListItems)
{
var settings = mdb.GetStreamSettings(streamID);
var presentCount = mdb.PlayListItems.Count(nameof(MDBNowPlaying.StreamID), MDBStreamType.JukeBob);
if (settings.MaximumTitleCount > 0 && presentCount > settings.MaximumTitleCount)
{
throw new WebServerException(WebError.DatasetAlreadyPresent, "Already {0} titles present at playlist!", presentCount);
}
bool exist =
//if is in nowplaying (file, JukeBob)
mdb.NowPlaying.Exist(
Search.FieldEquals(nameof(MDBNowPlaying.AudioFileID), audioFileID) &
Search.FieldEquals(nameof(MDBNowPlaying.StreamID), MDBStreamType.JukeBob)
) ||
//or is in playlist (file, JukeBob)
mdb.PlayListItems.Exist(
Search.FieldEquals(nameof(MDBPlayListItem.AudioFileID), audioFileID) &
Search.FieldEquals(nameof(MDBPlayListItem.StreamID), MDBStreamType.JukeBob)
);
if (exist)
{
throw new WebServerException(WebError.DatasetAlreadyPresent, "Title is already present at playlist!");
}
var item = new MDBPlayListItem()
{
AudioFileID = audioFileID,
StreamID = streamID,
Added = DateTime.UtcNow.AddTicks(DefaultRNG.Int8),
};
item.OwnerID = webData.Session.GetUser().ID;
long titleCount = mdb.PlayListItems.Count(Search.FieldEquals(nameof(MDBPlayListItem.OwnerID), item.OwnerID));
if (settings.TitlesPerUser > 0 && titleCount + 1 > settings.TitlesPerUser)
{
throw new WebServerException(WebError.MissingRights, 0, string.Format("You already have {0} titles at the playlist.", titleCount));
}
mdb.PlayListItems.Insert(item);
}
}