Calling addBookMarkFolder & addBookMarkLink from onMessage Listener

background.ts

chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
  if (request.myBookMark) {
    chrome.bookmarks.getTree((bookmarks) => {   // let's search and try to find if the folder already exists
      const bookmarkBar = bookmarks[0].children.find(bookmark => bookmark.id === '1');   // the bookmar bar is given id '1'
      const existAlready = bookmarkBar.children.find(bookmark => bookmark.title === BOOKMARK_FOLDER.title);
      if (!existAlready) {
        addBookMarkFolder()
          .pipe(concatMap((folder) => addBookMarkLink(folder))) // concat to pass the folder created value down to addBookMarkLink
          .subscribe((result) => sendResponse(result)); // sending as a response the result
      }
    });
  }
});