// Git Branch Title

function OnInit(initData)
{
	initData.name = "Git Branch Title";
	initData.version = "1.0";
//	initData.copyright = "...";
	initData.url = "https://resource.dopus.com/t/showing-git-branch-in-dopus/18347";
	initData.desc = "Show Git branch in window title";
	initData.default_enable = true;
	initData.min_version = "12.0";
}

function FindGitHead(path)
{
  var git_head_path = null;
  if (path.drive != 0) // Leo 26/Jun/2018: Only check on local drives.
  {
    var n = path.components;
    for (var i = 0; i < n; ++i) {
      var file_path = DOpus.FSUtil.NewPath(path);
      file_path.Add(".git");
      file_path.Add("HEAD");
      if (DOpus.FSUtil.Exists(file_path)) {
        git_head_path = DOpus.FSUtil.NewPath(file_path);
        break;
      }
      path.Parent();
    }
  }
  return git_head_path;
}

function ReatGitBranch(path)
{
  var git_branch = null;
  var fso = new ActiveXObject("Scripting.FilesystemObject");
  var file = fso.OpenTextFile(path, 1, -2);
  while (!file.AtEndOfStream) {
    var line  = file.ReadLine();
    var re    = /ref: refs\/heads\/(.+)/;
    var match = re.exec(line);
    if (match != null) {
      git_branch = match[1];
    }
  }
  file.Close();
  return git_branch;
}

function UpdateTitleAndLabel(tab)
{
  var label = tab.path.filepart;
  var git_head_path = FindGitHead(tab.path);
  if (git_head_path != null) {
    var git_branch = ReatGitBranch(git_head_path);
    if (git_branch != null) {
      label = label + " (" + git_branch + ")";
    }
  }
  // New DOpus command
  var dopus_cmd = DOpus.NewCommand();
  // Change lister title
  var cmd = "SET LISTERTITLE=\"" + label + "\"";
  dopus_cmd.RunCommand(cmd);
  // Change tab label
  var cmd = "GO TABNAME=\"" + label + "\"";
  dopus_cmd.RunCommand(cmd);
}

function OnActivateTab(data)
{
  UpdateTitleAndLabel(data.newtab);
}

function OnAfterFolderChange(data)
{
  if (data.result) {
    UpdateTitleAndLabel(data.tab);
  }
}