MD Bookmarks: Implement 'Sort by Title' menu button

chrome/browser/resources/md_bookmarks/reducers.js

 // 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 Module of functions which produce a new page state in response
  * to an action. Reducers (in the same sense as Array.prototype.reduce) must be
  * pure functions: they must not modify existing state objects, or make any API
  * calls.
  */
@@ skipping 186 matching lines @@
       return /** @type {BookmarkNode} */ (
           Object.assign({}, node, action.changeInfo));
     });
   };
 
   /**
    * @param {NodeList} nodes
    * @param {Action} action
    * @return {NodeList}
    */
-  NodeState.removeBookmark = function(nodes, action) {
-    var newState =
-        NodeState.modifyNode_(nodes, action.parentId, function(node) {
-          var newChildren = node.children.slice();
-          newChildren.splice(action.index, 1);
-          return /** @type {BookmarkNode} */ (
-              Object.assign({}, node, {children: newChildren}));
-        });
-
-    return bookmarks.util.removeIdsFromMap(newState, action.descendants);
-  };
-
-  /**
-   * @param {NodeList} nodes
-   * @param {Action} action
-   * @return {NodeList}
-   */
   NodeState.moveBookmark = function(nodes, action) {
     var nodeModifications = {};
     var id = action.id;
 
     // Change node's parent.
     nodeModifications[id] =
         Object.assign({}, nodes[id], {parentId: action.parentId});
 
     // Remove from old parent.
     var oldParentId = action.oldParentId;
@@ skipping 12 matching lines @@
         Object.assign({}, nodes[parentId], {children: parentChildren});
 
     return Object.assign({}, nodes, nodeModifications);
   };
 
   /**
    * @param {NodeList} nodes
    * @param {Action} action
    * @return {NodeList}
    */
+  NodeState.removeBookmark = function(nodes, action) {
+    var newState =
+        NodeState.modifyNode_(nodes, action.parentId, function(node) {
+          var newChildren = node.children.slice();
+          newChildren.splice(action.index, 1);
+          return /** @type {BookmarkNode} */ (
+              Object.assign({}, node, {children: newChildren}));
+        });
+
+    return bookmarks.util.removeIdsFromMap(newState, action.descendants);
+  };
+
+  /**
+   * @param {NodeList} nodes
+   * @param {Action} action
+   * @return {NodeList}
+   */
+  NodeState.reorderChildren = function(nodes, action) {
+    return NodeState.modifyNode_(nodes, action.id, function(node) {
+      return /** @type {BookmarkNode} */ (
+          Object.assign({}, node, {children: action.children}));
+    });
+  };
+
+  /**
+   * @param {NodeList} nodes
+   * @param {Action} action
+   * @return {NodeList}
+   */
   NodeState.updateNodes = function(nodes, action) {
     switch (action.name) {
       case 'create-bookmark':
         return NodeState.createBookmark(nodes, action);
       case 'edit-bookmark':
         return NodeState.editBookmark(nodes, action);
+      case 'move-bookmark':
+        return NodeState.moveBookmark(nodes, action);
       case 'remove-bookmark':
         return NodeState.removeBookmark(nodes, action);
-      case 'move-bookmark':
-        return NodeState.moveBookmark(nodes, action);
+      case 'reorder-children':
+        return NodeState.reorderChildren(nodes, action);
       case 'refresh-nodes':
         return action.nodes;
       default:
         return nodes;
     }
   };
 
   var SelectedFolderState = {};
 
   /**
@@ skipping 139 matching lines @@
 
   return {
     reduceAction: reduceAction,
     ClosedFolderState: ClosedFolderState,
     NodeState: NodeState,
     SearchState: SearchState,
     SelectedFolderState: SelectedFolderState,
     SelectionState: SelectionState,
   };
 });