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unit USong_TextFile;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses
Classes,
SysUtils,
USong;
type
{*******************
Child of the new TSong class.
implements filehandling to load a song from a text file
*******************}
TSong_TextFile = class(TSong)
protected
SongFile: TextFile;
Function OpenSongFile: Boolean;
Function IsDataAvailable: Boolean;
Function GetNextLine(): String;
Procedure CloseSongFile;
end;
implementation
uses
ULog;
//--------
// Open the SongFile
//--------
Function TSong_TextFile.OpenSongFile: Boolean;
begin
Result := False;
if not FileExists(FilePath + FileName) then
Log.LogError('File does not exsist', FilePath + FileName)
else
begin
try
AssignFile(SongFile, FilePath + FileName);
Reset(SongFile);
Result := True;
except
Log.LogError('Faild to open file', FilePath + FileName)
end;
end;
end;
//--------
// More data in songfile available?
//--------
Function TSong_TextFile.IsDataAvailable: Boolean;
begin
Result := not eof(SongFile);
end;
//--------
// Returns the next line from the SongFile
//--------
Function TSong_TextFile.GetNextLine(): String;
begin
ReadLn(SongFile, Result);
Result := Trim(Result);
end;
//--------
// Close the SongFile
//--------
Procedure TSong_TextFile.CloseSongFile;
begin
try
CloseFile(SongFile);
except
Log.LogError('Error closing file', FilePath + FileName);
end;
end;
end.
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