Chrome扩展开发：Bookmark

除了参考chrome.bookmarksAPI外，主要是API异步调用的处理。

var other_bookmarks, pone_bookmarks;

Step(
  function get_child() {
    chrome.bookmarks.getChildren('0', this); 
  },
  function callback(nodes) {
    if(!nodes) return false;
    var node = filter_bookmarks(nodes, 'Other bookmarks');
    console.log(node);

    other_bookmarks = node;
    chrome.bookmarks.getChildren(node.id, this);
  },
  function callback(nodes) {
    if(!nodes) return false;
    pone_bookmarks = filter_bookmarks(nodes, 'Chrome Pone');
    console.log(pone_bookmarks);
    return pone_bookmarks;
  },
  function create(err, pone_bookmarks){
    if (err) throw err;

    if(pone_bookmarks){
      return pone_bookmarks;
    }

    console.log('... create folder for pone');
    var pid   = other_bookmarks.id;
    var title = 'Chrome Pone';
    pone_bookmarks = chrome.bookmarks.create({'parentId': pid, 'title': title});
  }
);