public TidalAlbumList RandomCopy()
{
var retVal = new TidalAlbumList()
{
State = ListState.random
};
var copy = new TidalAlbumList(Name, this);
var random = new Random();
while (copy.Count > 0)
{
if (copy.Count == 1)
{
retVal.AddAlbum(copy.GetAlbumAt(0));
copy.RemoveAlbum(0);
}
else
{
var index = random.Next(copy.Count);
retVal.AddAlbum(copy.GetAlbumAt(index));
copy.RemoveAlbum(index);
}
}
return(retVal);
}
public Playlist()
{
Albums = new TidalAlbumList()
{
State = ListState.random
};
}
public TidalAlbumList RandomSublist(int size)
{
if (size > Count)
{
throw new ArgumentException("Size cannot exceed library size");
}
var randomList = RandomCopy();
var retVal = new TidalAlbumList()
{
State = ListState.random
};
var index = 0;
while (retVal.Count < size)
{
//if retVal already contains an album with the potential artist, skip, size permitting
var albumToAdd = randomList.GetAlbumAt(index);
if (retVal.Any(a => a.Artist == albumToAdd.Artist))
{
//see if we have enough room.
var stillToAdd = size - retVal.Count;
var sourceAlbumsLeft = randomList.Count - (index + 1);
//just skip one. If it's that artist again, it was meant to be.
if (stillToAdd <= sourceAlbumsLeft)
{
index++;
albumToAdd = randomList.GetAlbumAt(index);
}
}
retVal.AddAlbum(albumToAdd);
index++;
}
return(retVal);
}
static void Main(string[] args)
{
var masterList = new TidalAlbumList()
{
Name = "From file"
};
using (StreamReader reader = new StreamReader("Data2.txt")){
var line = reader.ReadLine();
while (line != null)
{
var parts = line.Split('\t');
masterList.AddAlbum(new TidalAlbum(parts[0], parts[1], null));
line = reader.ReadLine();
}
}
var startNumber = 56;
var availableCount = masterList.AvailableList().Count;
using (StreamWriter writer = new StreamWriter("Playlist2.txt", false))
{
while (availableCount > 16)
{
var playList = masterList.AvailableList().RandomSublist(16);
var playListName = $"PL{startNumber++}";
playList.Name = playListName;
playList.ForEach(ta => ta.PlayList = playListName);
masterList.AssignPlaylist(playList, playListName);
var outPut = playList.ToStringList();
outPut.ForEach(l => writer.WriteLine(l));
availableCount = masterList.AvailableList().Count;
writer.WriteLine();
}
}
}
