function OnInit(initData) {
    initData.name = 'BackupMeta';
    initData.version = '2023-08-18';
    initData.url = 'https://resource.dopus.com/t/backupmeta-backup-and-restore-opus-metadata/45497';
    initData.desc = 'Write recovery commands for some metadata to a text file.';
    initData.default_enable = true;
    initData.min_version = '12.0';
}

function OnAddCommands(addCmdData) {
    var cmd = addCmdData.AddCommand();
    cmd.name = 'BackupMeta';
    cmd.method = 'OnBackupMeta';
    cmd.desc = 'Write recovery commands for some metadata to a text file.';
    cmd.label = 'BackupMeta';
    cmd.template = '';
    cmd.hide = false;
    cmd.icon = 'script';
}

function OnBackupMeta(scriptCmdData) {
    var cmd = scriptCmdData.func.command;
    var tab = scriptCmdData.func.sourcetab;
    var fsu = DOpus.FSUtil();

    cmd.deselect = false;

    if (tab.selected.count == 0) return;

    var progDlg = DOpus.Create().Command().progress;

    progDlg.abort = true;
    progDlg.delay = false;
    progDlg.Init(tab.lister);
    progDlg.SetTitle('BackupMeta');
    progDlg.SetStatus('Enumerating selection...');
    progDlg.SetFiles(tab.selected.count);
    progDlg.Show();

    var vec = DOpus.Create().Vector(tab.selected_files);

    for (var e = new Enumerator(tab.selected_dirs); !e.atEnd(); e.moveNext()) {
        var item = e.item();
        vec.push_back(item);
        progDlg.StepFiles(1);
        progDlg.SetName(item);
        var folderEnum = fsu.ReadDir(item, 'r');
        while (!folderEnum.complete) {
            if (progDlg.GetAbortState() == 'a') return;
            var folderItem = folderEnum.Next();
            vec.push_back(folderItem);
            if (!folderItem.is_dir) continue;
            progDlg.SetName(folderItem);
        }
        folderEnum.Close();
    }

    if (vec.empty) return;

    progDlg.Restart();
    progDlg.SetStatus('Generating commands for ' + vec.count + ' files...');
    progDlg.SetFiles(vec.count);

    var bakFileItem = fsu.GetItem(fsu.Resolve('/profile\\OpusBackup\\Recovery-' + DOpus.Create().Date().Format('D#yyyyMMdd-T#HHmmss') + '.txt'));
    cmd.RunCommand('CreateFolder NAME="' + bakFileItem.path + '"');
    var bakFile = bakFileItem.Open('wa'); // create a new file, always. If the file already exists it will be overwritten. 

    for (var e = new Enumerator(vec); !e.atEnd(); e.moveNext()) {
        if (progDlg.GetAbortState() == 'a') break;

        var item = e.item();
        progDlg.StepFiles(1);
        progDlg.SetName(item);

        if (item.metadata == 'none') continue;

        var itemLabels = item.Labels();

        if (itemLabels.count > 0) {
            var strLabels = '';

            for (var ee = new Enumerator(itemLabels); !ee.atEnd(); ee.moveNext()) {
                strLabels += ee.item() + ',';
            }

            var cmdLine = 'Properties' +
                ' FILE="' + item + '"' +
                ' SETLABEL="' + strLabels.slice(0, -1) + '"';
            bakFile.Write(cmdLine + '\r\n');
        }

        var userComment = item.metadata.other.usercomment;

        if (typeof userComment != 'undefined') {
            if (userComment.indexOf('\r') < 0 && userComment.indexOf('\n') < 0) {
                userComment = userComment.replace(/"/g, '""');
                var cmdLine = 'SetAttr' +
                    ' FILE="' + item + '"' +
                    ' META' +
                    ' "usercomment:' + userComment + '"';
            } else {
                userComment = userComment.replace(/\r/g, '\\r');
                userComment = userComment.replace(/\n/g, '\\n');
                userComment = userComment.replace(/"/g, '\\"');
                var cmdLine = 'exiftool.exe' +
                    ' -escapeC' +
                    ' -UserComment="' + userComment + '"' +
                    ' "' + item + '"';
            }
            bakFile.Write(cmdLine + '\r\n');
        }
    }

    bakFile.Close();

    cmd.RunCommand('Go' +
        ' PATH="' + bakFileItem + '"' +
        ' NEWTAB=findexisting' +
        ' OPENINDUAL');
}