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+{* UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *}
+
+unit UPlaylist;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+ Classes,
+ USong,
+ UPath,
+ UPathUtils;
+
+type
+ TPlaylistItem = record
+ Artist: UTF8String;
+ Title: UTF8String;
+ SongID: Integer;
+ end;
+
+ APlaylistItem = array of TPlaylistItem;
+
+ TPlaylist = record
+ Name: UTF8String;
+ Filename: IPath;
+ Items: APlaylistItem;
+ end;
+
+ APlaylist = array of TPlaylist;
+
+ //----------
+ //TPlaylistManager - Class for Managing Playlists (Loading, Displaying, Saving)
+ //----------
+ TPlaylistManager = class
+ private
+
+ public
+ Mode: TSingMode; //Current Playlist Mode for SongScreen
+ CurPlayList: Cardinal;
+ CurItem: Cardinal;
+
+ Playlists: APlaylist;
+
+ constructor Create;
+ procedure LoadPlayLists;
+ function LoadPlayList(Index: Cardinal; const Filename: IPath): Boolean;
+ procedure SavePlayList(Index: Cardinal);
+
+ procedure SetPlayList(Index: Cardinal);
+
+ function AddPlaylist(const Name: UTF8String): Cardinal;
+ procedure DelPlaylist(const Index: Cardinal);
+
+ procedure AddItem(const SongID: Cardinal; const iPlaylist: Integer = -1);
+ procedure DelItem(const iItem: Cardinal; const iPlaylist: Integer = -1);
+
+ procedure GetNames(var PLNames: array of UTF8String);
+ function GetIndexbySongID(const SongID: Cardinal; const iPlaylist: Integer = -1): Integer;
+ end;
+
+ {Modes:
+ 0: Standard Mode
+ 1: Category Mode
+ 2: PlayList Mode}
+
+ var
+ PlayListMan: TPlaylistManager;
+
+
+implementation
+
+uses
+ SysUtils,
+ USongs,
+ ULog,
+ UMain,
+ UFilesystem,
+ UGraphic,
+ UThemes,
+ UUnicodeUtils;
+
+//----------
+//Create - Construct Class - Dummy for now
+//----------
+constructor TPlayListManager.Create;
+begin
+ inherited;
+ LoadPlayLists;
+end;
+
+//----------
+//LoadPlayLists - Load list of Playlists from PlayList Folder
+//----------
+Procedure TPlayListManager.LoadPlayLists;
+var
+ Len: Integer;
+ PlayListBuffer: TPlayList;
+ Iter: IFileIterator;
+ FileInfo: TFileInfo;
+begin
+ SetLength(Playlists, 0);
+
+ Iter := FileSystem.FileFind(PlayListPath.Append('*.upl'), 0);
+ while (Iter.HasNext) do
+ begin
+ Len := Length(Playlists);
+ SetLength(Playlists, Len + 1);
+
+ FileInfo := Iter.Next;
+
+ if not LoadPlayList(Len, FileInfo.Name) then
+ SetLength(Playlists, Len)
+ else
+ begin
+ // Sort the Playlists - Insertion Sort
+ PlayListBuffer := Playlists[Len];
+ Dec(Len);
+ while (Len >= 0) AND (CompareText(Playlists[Len].Name, PlayListBuffer.Name) >= 0) do
+ begin
+ Playlists[Len+1] := Playlists[Len];
+ Dec(Len);
+ end;
+ Playlists[Len+1] := PlayListBuffer;
+ end;
+ end;
+end;
+
+//----------
+//LoadPlayList - Load a Playlist in the Array
+//----------
+function TPlayListManager.LoadPlayList(Index: Cardinal; const Filename: IPath): Boolean;
+
+ function FindSong(Artist, Title: UTF8String): Integer;
+ var I: Integer;
+ begin
+ Result := -1;
+
+ For I := low(CatSongs.Song) to high(CatSongs.Song) do
+ begin
+ if (CatSongs.Song[I].Title = Title) and (CatSongs.Song[I].Artist = Artist) then
+ begin
+ Result := I;
+ Break;
+ end;
+ end;
+ end;
+
+var
+ TextStream: TTextFileStream;
+ Line: UTF8String;
+ PosDelimiter: Integer;
+ SongID: Integer;
+ Len: Integer;
+ FilenameAbs: IPath;
+begin
+ //Load File
+ try
+ FilenameAbs := PlaylistPath.Append(Filename);
+ TextStream := TMemTextFileStream.Create(FilenameAbs, fmOpenRead);
+ except
+ begin
+ Log.LogError('Could not load Playlist: ' + FilenameAbs.ToNative);
+ Result := False;
+ Exit;
+ end;
+ end;
+ Result := True;
+
+ //Set Filename
+ Playlists[Index].Filename := Filename;
+ Playlists[Index].Name := '';
+
+ //Read Until End of File
+ while TextStream.ReadLine(Line) do
+ begin
+ if (Length(Line) > 0) then
+ begin
+ PosDelimiter := UTF8Pos(':', Line);
+ if (PosDelimiter <> 0) then
+ begin
+ //Comment or Name String
+ if (Line[1] = '#') then
+ begin
+ //Found Name Value
+ if (Uppercase(Trim(copy(Line, 2, PosDelimiter - 2))) = 'NAME') then
+ PlayLists[Index].Name := Trim(copy(Line, PosDelimiter + 1,Length(Line) - PosDelimiter))
+
+ end
+ //Song Entry
+ else
+ begin
+ SongID := FindSong(Trim(copy(Line, 1, PosDelimiter - 1)), Trim(copy(Line, PosDelimiter + 1, Length(Line) - PosDelimiter)));
+ if (SongID <> -1) then
+ begin
+ Len := Length(PlayLists[Index].Items);
+ SetLength(PlayLists[Index].Items, Len + 1);
+
+ PlayLists[Index].Items[Len].SongID := SongID;
+
+ PlayLists[Index].Items[Len].Artist := Trim(copy(Line, 1, PosDelimiter - 1));
+ PlayLists[Index].Items[Len].Title := Trim(copy(Line, PosDelimiter + 1, Length(Line) - PosDelimiter));
+ end
+ else Log.LogError('Could not find Song in Playlist: ' + PlayLists[Index].Filename.ToNative + ', ' + Line);
+ end;
+ end;
+ end;
+ end;
+
+ //If no special name is given, use Filename
+ if PlayLists[Index].Name = '' then
+ begin
+ PlayLists[Index].Name := FileName.SetExtension('').ToUTF8;
+ end;
+
+ //Finish (Close File)
+ TextStream.Free;
+end;
+
+{**
+ * Saves the specified Playlist
+ *}
+procedure TPlayListManager.SavePlayList(Index: Cardinal);
+var
+ TextStream: TTextFileStream;
+ PlaylistFile: IPath;
+ I: Integer;
+begin
+ PlaylistFile := PlaylistPath.Append(Playlists[Index].Filename);
+
+ // cannot update read-only file
+ if PlaylistFile.IsFile() and PlaylistFile.IsReadOnly() then
+ Exit;
+
+ // open file for rewriting
+ TextStream := TMemTextFileStream.Create(PlaylistFile, fmCreate);
+ try
+ // Write version (not nessecary but helpful)
+ TextStream.WriteLine('######################################');
+ TextStream.WriteLine('#Ultrastar Deluxe Playlist Format v1.0');
+ TextStream.WriteLine(Format('#Playlist %s with %d Songs.',
+ [ Playlists[Index].Name, Length(Playlists[Index].Items) ]));
+ TextStream.WriteLine('######################################');
+
+ // Write name information
+ TextStream.WriteLine('#Name: ' + Playlists[Index].Name);
+
+ // Write song information
+ TextStream.WriteLine('#Songs:');
+
+ for I := 0 to high(Playlists[Index].Items) do
+ begin
+ TextStream.WriteLine(Playlists[Index].Items[I].Artist + ' : ' + Playlists[Index].Items[I].Title);
+ end;
+ except
+ Log.LogError('Could not write Playlistfile "' + Playlists[Index].Name + '"');
+ end;
+ TextStream.Free;
+end;
+
+{**
+ * Display a Playlist in CatSongs
+ *}
+procedure TPlayListManager.SetPlayList(Index: Cardinal);
+var
+ I: Integer;
+begin
+ if (Int(Index) > High(PlayLists)) then
+ exit;
+
+ //Hide all Songs
+ for I := 0 to high(CatSongs.Song) do
+ CatSongs.Song[I].Visible := False;
+
+ //Show Songs in PL
+ for I := 0 to high(PlayLists[Index].Items) do
+ begin
+ CatSongs.Song[PlayLists[Index].Items[I].SongID].Visible := True;
+ end;
+
+ //Set CatSongsMode + Playlist Mode
+ CatSongs.CatNumShow := -3;
+ Mode := smPlayListRandom;
+
+ //Set CurPlaylist
+ CurPlaylist := Index;
+
+ //Show Cat in Topleft:
+ ScreenSong.ShowCatTLCustom(Format(Theme.Playlist.CatText,[Playlists[Index].Name]));
+
+ //Fix SongSelection
+ ScreenSong.Interaction := 0;
+ ScreenSong.SelectNext;
+ ScreenSong.FixSelected;
+
+ //Play correct Music
+ ScreenSong.ChangeMusic;
+end;
+
+//----------
+//AddPlaylist - Adds a Playlist and Returns the Index
+//----------
+function TPlayListManager.AddPlaylist(const Name: UTF8String): cardinal;
+var
+ I: Integer;
+ PlaylistFile: IPath;
+begin
+ Result := Length(Playlists);
+ SetLength(Playlists, Result + 1);
+
+ // Sort the Playlists - Insertion Sort
+ while (Result > 0) and (CompareText(Playlists[Result - 1].Name, Name) >= 0) do
+ begin
+ Dec(Result);
+ Playlists[Result+1] := Playlists[Result];
+ end;
+ Playlists[Result].Name := Name;
+
+ // clear playlist items
+ SetLength(Playlists[Result].Items, 0);
+
+ I := 1;
+ PlaylistFile := PlaylistPath.Append(Name + '.upl');
+ while (PlaylistFile.Exists) do
+ begin
+ Inc(I);
+ PlaylistFile := PlaylistPath.Append(Name + InttoStr(I) + '.upl');
+ end;
+ Playlists[Result].Filename := PlaylistFile.GetName;
+
+ //Save new Playlist
+ SavePlayList(Result);
+end;
+
+//----------
+//DelPlaylist - Deletes a Playlist
+//----------
+procedure TPlayListManager.DelPlaylist(const Index: Cardinal);
+var
+ I: Integer;
+ Filename: IPath;
+begin
+ if Int(Index) > High(Playlists) then
+ Exit;
+
+ Filename := PlaylistPath.Append(Playlists[Index].Filename);
+
+ //If not FileExists or File is not Writeable then exit
+ if (not Filename.IsFile()) or (Filename.IsReadOnly()) then
+ Exit;
+
+
+ //Delete Playlist from FileSystem
+ if not Filename.DeleteFile() then
+ Exit;
+
+ //Delete Playlist from Array
+ //move all PLs to the Hole
+ for I := Index to High(Playlists)-1 do
+ PlayLists[I] := PlayLists[I+1];
+
+ //Delete last Playlist
+ SetLength (Playlists, High(Playlists));
+
+ //If Playlist is Displayed atm
+ //-> Display Songs
+ if (CatSongs.CatNumShow = -3) and (Index = CurPlaylist) then
+ begin
+ ScreenSong.UnLoadDetailedCover;
+ ScreenSong.HideCatTL;
+ CatSongs.SetFilter('', fltAll);
+ ScreenSong.Interaction := 0;
+ ScreenSong.FixSelected;
+ ScreenSong.ChangeMusic;
+ end;
+end;
+
+//----------
+//AddItem - Adds an Item to a specific Playlist
+//----------
+Procedure TPlayListManager.AddItem(const SongID: Cardinal; const iPlaylist: Integer);
+var
+ P: Cardinal;
+ Len: Cardinal;
+begin
+ if iPlaylist = -1 then
+ P := CurPlaylist
+ else if (iPlaylist >= 0) AND (iPlaylist <= high(Playlists)) then
+ P := iPlaylist
+ else
+ exit;
+
+ if (Int(SongID) <= High(CatSongs.Song)) AND (NOT CatSongs.Song[SongID].Main) then
+ begin
+ Len := Length(Playlists[P].Items);
+ SetLength(Playlists[P].Items, Len + 1);
+
+ Playlists[P].Items[Len].SongID := SongID;
+ Playlists[P].Items[Len].Title := CatSongs.Song[SongID].Title;
+ Playlists[P].Items[Len].Artist := CatSongs.Song[SongID].Artist;
+
+ //Save Changes
+ SavePlayList(P);
+
+ //Correct Display when Editing current Playlist
+ if (CatSongs.CatNumShow = -3) and (P = CurPlaylist) then
+ SetPlaylist(P);
+ end;
+end;
+
+//----------
+//DelItem - Deletes an Item from a specific Playlist
+//----------
+Procedure TPlayListManager.DelItem(const iItem: Cardinal; const iPlaylist: Integer);
+var
+ I: Integer;
+ P: Cardinal;
+begin
+ if iPlaylist = -1 then
+ P := CurPlaylist
+ else if (iPlaylist >= 0) AND (iPlaylist <= high(Playlists)) then
+ P := iPlaylist
+ else
+ exit;
+
+ if (Int(iItem) <= high(Playlists[P].Items)) then
+ begin
+ //Move all entrys behind deleted one to Front
+ For I := iItem to High(Playlists[P].Items) - 1 do
+ Playlists[P].Items[I] := Playlists[P].Items[I + 1];
+
+ //Delete Last Entry
+ SetLength(PlayLists[P].Items, Length(PlayLists[P].Items) - 1);
+
+ //Save Changes
+ SavePlayList(P);
+ end;
+
+ //Delete Playlist if Last Song is deleted
+ if (Length(PlayLists[P].Items) = 0) then
+ begin
+ DelPlaylist(P);
+ end
+ //Correct Display when Editing current Playlist
+ else if (CatSongs.CatNumShow = -3) and (P = CurPlaylist) then
+ SetPlaylist(P);
+end;
+
+//----------
+//GetNames - Writes Playlist Names in a Array
+//----------
+procedure TPlayListManager.GetNames(var PLNames: array of UTF8String);
+var
+ I: Integer;
+ Len: Integer;
+begin
+ Len := High(Playlists);
+
+ if (Length(PLNames) <> Len + 1) then
+ exit;
+
+ For I := 0 to Len do
+ PLNames[I] := Playlists[I].Name;
+end;
+
+//----------
+//GetIndexbySongID - Returns Index in the specified Playlist of the given Song
+//----------
+Function TPlayListManager.GetIndexbySongID(const SongID: Cardinal; const iPlaylist: Integer): Integer;
+var
+ P: Integer;
+ I: Integer;
+begin
+ Result := -1;
+
+ if iPlaylist = -1 then
+ P := CurPlaylist
+ else if (iPlaylist >= 0) AND (iPlaylist <= high(Playlists)) then
+ P := iPlaylist
+ else
+ exit;
+
+ For I := 0 to high(Playlists[P].Items) do
+ begin
+ if (Playlists[P].Items[I].SongID = Int(SongID)) then
+ begin
+ Result := I;
+ Break;
+ end;
+ end;
+end;
+
+end.