program jarunpacker;

{$mode delphi}
{$codepage UTF8}
uses
  Interfaces,
  Classes,
  Windows,
  FWZipReader,
  SysUtils,
  ParamsMngr,
  LazUTF8Classes,
  FWZipConsts,
  FWZipWriter,
  FWZipZLib,
  SimplyJSON,
  LazFileUtils,
  ANBFormatString;

{$R *.res}
resourcestring
  msg_consoletitle = 'JAR Unpacker Tool';
  msg_noparametrsfound = #13#10 + '[ОШИБКА] Параметры не заданы!';
  msg_extractingfile = 'Извлекаю файл: %s';
  msg_buildingfile = 'Сжимаю файл: %s';

  procedure ExtractJAR(const JARName, TargetDir, ListFileName: string);
  var
    Reader: TFWZipReader;
    zItem: TFWZipReaderItem;
    FS: TFileStreamUTF8;
    FL: TStringList;
    Indx: integer;
  begin
    FS := TFileStreamUTF8.Create(JARName, fmOpenRead + fmShareExclusive);
    FL := TStringList.Create;
    Reader := TFWZipReader.Create;
    try
      Reader.LoadFromStream(FS);
      for Indx := 0 to Reader.Count - 1 do
      begin
        zItem := Reader.Item[Indx];
        FL.Add(FormatStr(zItem.FileName + '=' + zItem.FileName, ['/'], ['\']));
      end;
      Reader.ExtractAll(TargetDir);
    finally
      Reader.Free;
      if Trim(ListFileName) <> '' then
        FL.SaveToFile(ListFileName);
      FreeAndNil(FL);
      FS.Free;
    end;
  end;

  procedure CompressJAR(const JARName, SourceDir, ListFileName: string);
  var
    Writer: TFWZipWriter;
    FS: TFileStreamUTF8;
    FL: TStringList;
  begin
    if FileExistsUTF8(JARName) then
      DeleteFileUTF8(JARName);
    FS := TFileStreamUTF8.Create(JARName, fmCreate);
    FL := TStringList.Create;
    FL.LoadFromFile(ListFileName);
    SetCurrentDir(SourceDir);
    Writer := TFWZipWriter.Create(clMax);
    try
      Writer.AddFilesAndFolders(FL, True);
      Writer.BuildZip(FS);
    finally
      Writer.Free;
      FreeAndNil(FL);
      FS.Free;
    end;
  end;

  procedure WriteHelpExtract();
  begin
    WriteLn('Допустимые параметры команды extract:');
    WriteLn('    target - папка извлечения;');
    WriteLn('    listFile - имя файла для списка распакованных файлов.');
    WriteLn('');
    WriteLn('Пример:');
    WriteLn('/extract="d:\file.jar" /target="d:\toextract\" /listFile="d:\1.txt"');
  end;

  procedure WriteHelpCompress();
  begin
    WriteLn('Допустимые параметры команды compress:');
    WriteLn('    from - папка с файлами для архива;');
    WriteLn('    filesList - имя файла со списком файлов для упаковки.');
    WriteLn('');
    WriteLn('Пример:');
    WriteLn('/compress="d:\file.jar" /from="d:\toextract\" /filesList="d:\1.txt"');
  end;

  procedure WriteHelp();
  begin
    WriteLn('Допустимые параметры:');
    WriteLn('    extract - извлечение jar-архива;');
    WriteLn('    compres - сжатие jar-ахива.');
    WriteLn('');
    WriteHelpExtract;
    WriteLn('');
    WriteHelpCompress();
    WriteLn(msg_noparametrsfound);
  end;

var
  isHandled: boolean;
  JARName, TargetDir, ListFileName: string;
begin
  SetConsoleTitle(PChar(msg_consoletitle));
  WriteLn('--------------------------------------------------------------------');
  WriteLn('****************Утилита упаковки/распаковки JAR файлов**************');
  WriteLn('*************************Версия: 2023.01.31*************************');
  WriteLn('**********Авторские права (c) 2016 - 2023, Александр Бабаев*********');
  WriteLn('--------------------------------------------------------------------');
  isHandled := False;
  if HasParam('extract') then
  begin
    if not (HasParam('target') and HasParam('listFile')) then
    begin
      WriteHelpExtract();
      ReadLn;
      isHandled := True;
    end
    else
    begin
      JARName := GetParamValue('extract');
      TargetDir := IncludeTrailingBackslash(GetParamValue('target'));
      ListFileName := GetParamValue('listFile');
      ExtractJAR(JARName, TargetDir, ListFileName);
      WriteLn(Format(msg_extractingfile, [JARName]));
      isHandled := True;
    end;
  end;
  if HasParam('compress') then
  begin
    if not (HasParam('from') and HasParam('filesList')) then
    begin
      WriteHelpExtract();
      ReadLn;
      isHandled := True;
    end
    else
    begin
      JARName := GetParamValue('compress');
      TargetDir := GetParamValue('from');
      ListFileName := GetParamValue('filesList');
      CompressJAR(JARName, TargetDir, ListFileName);
      WriteLn(Format(msg_buildingfile, [JARName]));
      isHandled := True;
    end;
  end;
  if not isHandled then
  begin
    WriteHelp();
    ReadLn;
  end;
end.