{
   ExifTool Metadata Output will dump all metadata fields identified
   by the ExifTool program.
   
   Version 1.3; Author: IDimager
                Date: 15 Nov 2022
                Added "Save as Text File" Option

   Version 1.2; Addition of largefilesupport: Petter Flink
                Date: 4 Feb 2020

   Version 1.1; Author: IDimager
                Date: 28 Aug 2019

   Version 1.0; Author: IDimager
                Date: 15 Apr 2018

   This program needs the ExifTool package installed on your machine.
   This distribution can be downloaded from the web site

     https://www.sno.phy.queensu.ca/~phil/exiftool

   ExifTool provides several different distributions.

   For Windows users, the simplest distribution to install is the
   satndalone Windows executable zip file.  Download it, unzip it,
   and copy the file exiftool(-k).exe into
     %LocalAppData%\IDimager Systems, Inc\ExifTool.exe
   This is the directory that contains the PSU Catalog subdirectory, etc.

   For Mac users, the simplest thing to do is to download the MacOS
   Package, which installs the executable exiftool into /usr/local/bin

   By default, this script searches for the ExifTool executable
   in the following order:

     If the registry key 'ExifToolFileName' is set, the script will
     use the key's value as the location of the ExifTool
     executable.

     In the directory <Application Data Directory>.

     In the standard system directory (C:\Windows on Windows,
     /usr/local/bin on Mac.

   The registry key is useful when the ExifTool package has previously
   been installed into a non-standard system directory.
   To set the registry key, type and execute the following within
   Tools>Scripter

     WriteToRegistry('', 'ExifToolFileName', <pathname of exiftool executable>);

   and then restart the program.
}

var
  AGrid: TvxStringGrid;
  AShortFormat: TvxCheckBox;
  AOut: TStringList;

  procedure DumpExifTool(ACmd: WideString; AGrid: TvxStringGrid; var row: Integer; ASeparator: Char);
  var
    i: Integer;
    p: Integer;
    S: String;
  begin
    AOut.Clear;
    RunAppAndWaitForOutput(ACmd, AOut, False);
    for i := 0 to AOut.Count - 1 do
    begin
      S := AOut.Strings[i];
      p := Pos(ASeparator, S);
      if p > 0 then
      begin
        AGrid.Cells[0, row] := UTF8Decode(Copy(S, 1, p - 1));
        AGrid.Cells[1, row] := UTF8Decode(Copy(S, p + 1, Length(S)))
      end
      else
        AGrid.Cells[0, row] := UTF8Decode(S);
      Inc(row);
    end;
  end;

  function FindExifTool(var AExecutable: WideString): Boolean;
  var
    AFile: WideString;
    IsWin: Boolean;
    SysDir: WideString;
  begin
    IsWin := IsWindows;
    if IsWin then
    begin
      AFile := 'ExifTool.exe';
      SysDir := WindowsDir;
    end
    else
    begin
      AFile := 'exiftool';
      SysDir := '/usr/local/bin/';
    end;
    result := True;
    AExecutable := ReadFromRegistry('', 'ExifToolFileName', '');
    if (AExecutable <> '') and WideFileExists(AExecutable) then exit;
    AExecutable := DefaultAppDataDir + AFile;
    if WideFileExists(AExecutable) then exit;
    AExecutable := SysDir + AFile;
    if WideFileExists(AExecutable) then exit;

    Say3('This script requires the executable file ' + AFile + ' in order to display metadata.',
      'html:If you have not yet installed the ExifTool package, you can find<br/>installation instructions at ' +
      '<a href="https://repository.idimager.com/openresource.asp?GUID=883726B04D0744AFB41009C4FE258C54">the online repository.</a>' +
      '.',
      'Please make sure ' + AFile + ' is installed in either ' +
      DefaultAppDataDir + ' or ' + SysDir + '. ' +
      'Alternatively, you can set the registry entry ExifToolFileName to the full pathname of the ExifTool executable.'
    );
    result := False;
  end;

  function CheckVersion41: Boolean;
  var
    ATokens: TTntStringList;
  begin
    result := False;
    ATokens := TTntStringList.Create;
    Tokenize(xomProductVersion, '.', ATokens);
    if ATokens.Count = 4 then
    begin
      if (IntToStr(ATokens.Strings[0]) > 4) or
         (
           (IntToStr(ATokens.Strings[0]) = 4) and
           (IntToStr(ATokens.Strings[1]) >= 1)
         )
      then
        result := True;
    end;
    ATokens.Free;
  end;

  procedure PopulateGrid;
  var
    row: Integer;
    ACmd: WideString;
    AExecutable: WideString;
  begin
    AGrid.BeginUpdate;
    AGrid.RowCount := 0;
    if not FindExifTool(AExecutable) then exit;
    row := 0;
    for i := 0 to Selected.Count - 1 do
    begin
      if AShortFormat.IsChecked then
      begin
        ACmd := '"' + AExecutable + '" -S -a -g -api largefilesupport=1 "' +  Selected.Items[i].ExifFileName + '"';
        DumpExifTool(ACmd, AGrid, row, ':');
      end
      else
      begin
        ACmd := '"' + AExecutable + '" -a -g -t -api largefilesupport=1 "' +  Selected.Items[i].ExifFileName + '"';
        DumpExifTool(ACmd, AGrid, row, #9);
      end;
    end;
    AGrid.EndUpdate;
  end;

  procedure OnShortFormatChange(Sender: TObject);
  begin
    PopulateGrid;
  end;

  procedure _SaveToFileClick(Sender: TObject);
  begin
    if SaveDialog.Execute then
    begin
      AOut.SaveToFile(SaveDialog.FileName);
      Say('Saved as ' + UTF8Decode(SaveDialog.FileName));
    end;
  end;

// MAIN
var
  i: Integer;
  AForm: TvxSceneForm;
  ACol: TvxStringColumn;
  ASettings: TvxLayout;
begin
  if not CheckVersion41 then
  begin
    Say('This script requires Photo Supreme 4.1 or higher');
    exit;
  end;

  if Selected.Count = 0 then
  begin
    Say ('No image selected');
    exit;
  end;

  AOut := TStringList.Create;

  AForm := TvxSceneForm.Create(nil);
  if Selected.Count = 1 then
    AForm.Caption := UTF8Encode(WideFormat('ExifTool Metadata [%s]', [WideExtractFileName(Selected.Items[0].ExifFileName)]))
  else
    AForm.Caption := UTF8Encode(IntToStr(Selected.Count) + ' images');
  AForm.Width := 520 * AForm.DPIFactor;
  AForm.Height := Trunc(Screen.Height * 0.6);
  AForm.BorderStyle := bsSizeable;

  AGrid := TvxStringGrid.Create(AForm.Root);
  AForm.Root.AddObject(AGrid);
  AGrid.Align := vaClient;
  AGrid.RowCount := 0;

  ACol := TvxStringColumn.Create(AGrid);
  ACol.Header := 'Tag';
  ACol.Width := 200;
  AGrid.AddObject(ACol);
  ACol := TvxStringColumn.Create(AGrid);
  ACol.Header := 'Value';
  ACol.Width := 300;
  AGrid.AddObject(ACol);

  ASettings := TvxLayout.Create(AForm.Root);
  ASettings.Align := vaBottom;
  ASettings.Height := 50;
  AForm.Root.AddObject(ASettings);

  AShortFormat := TvxCheckBox.Create(ASettings);
  AShortFormat.Text := 'Short tag names';
  AShortFormat.IsChecked := False;
  AShortFormat.Position.Point := vgPoint(5, 5);
  AShortFormat.OnChange := 'OnShortFormatChange';
  ASettings.AddObject(AShortFormat);

  PopulateGrid;

  AForm.PrepareModal([mbOK]);

  AButton := TvxButton.Create(AForm.ModalPanel)
  AButton.Text := 'Save as text file';
  AButton.Align := vaLeft;
  AButton.Width := 110;
  AButton.Padding.Rect := vxRect(5, 8, 5, 8);
  AButton.OnClick := '_SaveToFileClick';
  AForm.ModalPanel.AddObject(AButton);

  AForm.ShowModal;
  AForm.Free;

  AOut.Free;
end;