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//
// RandomByArtist.cs
//
// Author:
// Gabriel Burt <gburt@novell.com>
//
// Copyright (C) 2009 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using Hyena;
using Hyena.Data;
using Hyena.Data.Sqlite;
using Banshee.Query;
using Banshee.ServiceStack;
using Banshee.PlaybackController;
using Mono.Unix;
namespace Banshee.Collection.Database
{
public class RandomByArtist : RandomBy
{
private HyenaSqliteCommand query;
private int? id;
public RandomByArtist () : base ("artist")
{
Label = Catalog.GetString ("Shuffle by A_rtist");
Adverb = Catalog.GetString ("by artist");
Description = Catalog.GetString ("Play all songs by an artist, then randomly choose another artist");
Condition = "CoreAlbums.ArtistID = ?";
OrderBy = String.Format ("{0}, CoreTracks.AlbumID ASC, Disc ASC, TrackNumber ASC", BansheeQuery.YearField.Column);
}
protected override void OnModelAndCacheUpdated ()
{
query = null;
}
public override void Reset ()
{
id = null;
}
public override bool IsReady { get { return id != null; } }
public override bool Next (DateTime after)
{
Reset ();
using (var reader = ServiceManager.DbConnection.Query (Query, after, after)) {
if (reader.Read ()) {
id = Convert.ToInt32 (reader[0]);
}
}
return IsReady;
}
public override void SetLastTrack (TrackInfo track)
{
var dbtrack = track as DatabaseTrackInfo;
if (dbtrack != null) {
var new_id = dbtrack.Album.ArtistId;
if (new_id != id) {
id = new_id;
}
}
}
protected override IEnumerable<object> GetConditionParameters (DateTime after)
{
yield return id == null ? (int)0 : (int)id;
}
private HyenaSqliteCommand Query {
get {
if (query == null) {
query = new HyenaSqliteCommand (String.Format (@"
SELECT
CoreAlbums.ArtistID,
CoreAlbums.ArtistName,
MAX({4}) as LastPlayed,
MAX({5}) as LastSkipped
FROM
CoreTracks, CoreAlbums, CoreCache {0}
WHERE
{1}
CoreCache.ModelID = {2} AND
CoreTracks.AlbumID = CoreAlbums.AlbumID AND
{6} = 0
{3}
GROUP BY CoreTracks.AlbumID
HAVING
(LastPlayed < ? OR LastPlayed IS NULL) AND
(LastSkipped < ? OR LastSkipped IS NULL)
ORDER BY {7}
LIMIT 1",
Model.JoinFragment,
Model.CachesJoinTableEntries
? String.Format ("CoreCache.ItemID = {0}.{1} AND", Model.JoinTable, Model.JoinPrimaryKey)
: "CoreCache.ItemId = CoreTracks.TrackID AND",
Model.CacheId,
Model.ConditionFragment,
BansheeQuery.LastPlayedField.Column,
BansheeQuery.LastSkippedField.Column,
BansheeQuery.PlaybackErrorField.Column,
BansheeQuery.GetRandomSort ()
));
}
return query;
}
}
}
}
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