MD Bookmarks: Proof-of-concept reimplementation of data storage/binding layer

chrome/browser/resources/md_bookmarks/api_listener.js

Index: chrome/browser/resources/md_bookmarks/api_listener.js
diff --git a/chrome/browser/resources/md_bookmarks/api_listener.js b/chrome/browser/resources/md_bookmarks/api_listener.js
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Listener functions which translate events from the
+ * chrome.bookmarks API into actions to modify the local page state.
+ */
+
+cr.define('bookmarks.ApiListener', function() {
+
+  /** @param {Action} action */
+  function dispatch(action) {
+    bookmarks.Store.getInstance().handleAction(action);
+  }
+
+  /**
+   * @param {string} id
+   * @param {{title: string, url: (string|undefined)}} changeInfo
+   */
+  function onBookmarkChanged(id, changeInfo) {
+    dispatch(bookmarks.actions.editBookmark(id, changeInfo));
+  }
+
+  /**
+   * @param {string} id
+   * @param {{
+   *   parentId: string,
+   *   index: number,
+   *   node: BookmarkTreeNode
+   * }} removeInfo
+   */
+  function onBookmarkRemoved(id, removeInfo) {
+    dispatch(bookmarks.actions.removeBookmark(
+        id, removeInfo.parentId, removeInfo.index));
+  }
+
+  function onImportBegan() {
+    // TODO(rongjie): pause onCreated once this event is used.
+  }
+
+  function onImportEnded() {
+    chrome.bookmarks.getTree(function(results) {
+      dispatch(bookmarks.actions.refreshNodes(
+          bookmarks.util.normalizeNodes(results[0])));
+    });
+  }
+
+  function init() {
+    chrome.bookmarks.onChanged.addListener(onBookmarkChanged);
+    chrome.bookmarks.onRemoved.addListener(onBookmarkRemoved);
+    chrome.bookmarks.onImportBegan.addListener(onImportBegan);
+    chrome.bookmarks.onImportEnded.addListener(onImportEnded);
+  }
+
+  return {
+    init: init,
+  };
+});