chore: Add feature metrics for mainAction and checkbox items in butto…

…n dropdown (#2438)

src/button-dropdown/index.tsx

@@ -3,6 +3,7 @@
 import React from 'react';
 import { ButtonDropdownProps } from './interfaces';
 import InternalButtonDropdown from './internal';
+import { hasCheckboxItems } from './utils/utils';
 import { getBaseProps } from '../internal/base-component';
 import { applyDisplayName } from '../internal/utils/apply-display-name';
 import useBaseComponent from '../internal/hooks/use-base-component';
@@ -30,6 +31,10 @@ const ButtonDropdown = React.forwardRef(
   ) => {
     const baseComponentProps = useBaseComponent('ButtonDropdown', {
       props: { expandToViewport, expandableGroups, variant },
+      metadata: {
+        mainAction: !!mainAction,
+        checkboxItems: hasCheckboxItems(items),
+      },
     });
     const baseProps = getBaseProps(props);
     return (

src/button-dropdown/utils/create-items-tree.ts

@@ -79,7 +79,7 @@ export default function createItemsTree(items: ButtonDropdownProps.Items): Items
   };
 }
 
-function traverseItems(
+export function traverseItems(
   items: ButtonDropdownProps.Items,
   act: (item: ButtonDropdownProps.ItemOrGroup, index: TreeIndex) => void,
   parentIndex: TreeIndex = []

src/button-dropdown/utils/utils.ts

@@ -1,6 +1,7 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 import { ButtonDropdownProps, LinkItem } from '../interfaces';
+import { traverseItems } from './create-items-tree';
 
 export const isItemGroup = (item: ButtonDropdownProps.ItemOrGroup): item is ButtonDropdownProps.ItemGroup =>
   item && (item as ButtonDropdownProps.ItemGroup).items !== undefined;
@@ -36,3 +37,13 @@ export function indexEquals(left: number[], right: number[]) {
 
   return true;
 }
+
+export function hasCheckboxItems(items: ButtonDropdownProps.Items) {
+  let hasCheckboxItems = false;
+  traverseItems(items, item => {
+    if (item.itemType === 'checkbox') {
+      hasCheckboxItems = true;
+    }
+  });
+  return hasCheckboxItems;
+}