function OnInit(initData) {
    initData.name = 'RemoveEmptyColumns';
    initData.version = '2025-05-08';
    initData.url = 'https://resource.dopus.com/t/removeemptycolumns/43929';
    initData.desc = 'Remove empty columns from the file display';
    initData.default_enable = true;
    initData.min_version = '13';
}

function OnAddCommands(addCmdData) {
    var cmd = addCmdData.AddCommand();
    cmd.name = 'RemoveEmptyColumns';
    cmd.label = 'Remove Empty Columns';
    cmd.desc = 'Remove empty columns from the file display';
    cmd.method = 'OnRemoveEmptyColumns';
    cmd.template = '' +
        'all/s,' +
        'dryrun/s';
    cmd.hide = false;
    cmd.icon = 'script';
}

function OnRemoveEmptyColumns(scriptCmdData) {
    var cmd = scriptCmdData.func.command;
    var tab = scriptCmdData.func.sourcetab;
    var args = scriptCmdData.func.args;

    var fsu = DOpus.FSUtil();
    var ssi = DOpus.Create().StringSetI();
    var stt = DOpus.Create().StringTools();
    var ver = DOpus.version.AtLeast('13.14.10');

    cmd.deselect = false;

    var CRLF = '\r\n';

    var fileDisplay = [];

    var itemsToEnum = args.all ? tab.all : tab.selected;
    if (itemsToEnum.count == 0) {
        DOpus.Output('No files to process');
        return;
    }

    for (var e = new Enumerator(itemsToEnum); !e.atEnd(); e.moveNext()) {
        ssi.insert(e.item().realpath.pathpart);
    }

    for (var e = new Enumerator(ssi); !e.atEnd(); e.moveNext()) {
        var tmpFilePath = fsu.GetTempFilePath();

        var cmdLine = 'Print' +
            ' FOLDER' + (args.all ? '' : '=selected') +
            ' AS=tab' +
            ' KEYWORDS' +
            ' ENCODING=utf8' +
            (ver ? ' WHENEXISTS=replace' : '') +
            ' QUIET' +
            ' TO="' + tmpFilePath + '"';

        cmd.SetSource(e.item());
        cmd.RunCommand(cmdLine);

        var tmp = stt.Decode(fsu.OpenFile(tmpFilePath).Read(), 'utf8').split(CRLF);

        for (var i = 0; i < tmp.length; i++) {
            if (i == 0 && fileDisplay.length > 0) continue;
            var line = tmp[i];
            if (line.length == 0) continue;
            fileDisplay.push(line.split('\t'));
        }
    }

    if (fileDisplay.length == 0) {
        DOpus.Output('Could not print file display!?');
        return;
    }

    var cmdLine = '';

    for (var k = 0; k < fileDisplay[0].length; k++) {
        var len = 0;
        for (var j = 1; j < fileDisplay.length; j++) {
            len += fileDisplay[j][k].length;
        }
        if (len > 0) continue;  // skip if not empty

        if (cmdLine) cmdLine += ',';
        cmdLine += fileDisplay[0][k]; // keyword
    }

    if (!cmdLine) {
        DOpus.Output('No empty columns found');
        return;
    }

    cmdLine = 'Set COLUMNSREMOVE="' + cmdLine + '"';

    if (args.dryrun) {
        DOpus.Output(cmdLine);
    } else {
        cmd.RunCommand(cmdLine);
    }
}