feat: add MusicSortFilterButton (#151)

src/parser/classes/menus/MusicMenuItemDivider.ts

@@ -0,0 +1,12 @@
+import { YTNode } from '../../helpers';
+
+class MusicMenuItemDivider extends YTNode {
+  static type = 'MusicMenuItemDivider';
+
+  // eslint-disable-next-line
+  constructor(data: any) {
+    super();
+  }
+}
+
+export default MusicMenuItemDivider;

src/parser/classes/menus/MusicMultiSelectMenu.ts

@@ -0,0 +1,21 @@
+import MusicMultiSelectMenuItem from './MusicMultiSelectMenuItem';
+import MusicMenuItemDivider from './MusicMenuItemDivider';
+import { YTNode } from '../../helpers';
+import Text from '../misc/Text';
+import Parser from '../..';
+
+class MusicMultiSelectMenu extends YTNode {
+  static type = 'MusicMultiSelectMenu';
+
+  title: string;
+  options: Array<MusicMultiSelectMenuItem | MusicMenuItemDivider>;
+
+  constructor(data: any) {
+    super();
+
+    this.title = new Text(data.title.musicMenuTitleRenderer?.primaryText).text;
+    this.options = Parser.parseArray(data.options, [ MusicMultiSelectMenuItem, MusicMenuItemDivider ]);
+  }
+}
+
+export default MusicMultiSelectMenu;

src/parser/classes/menus/MusicMultiSelectMenuItem.ts

@@ -0,0 +1,37 @@
+import { YTNode } from '../../helpers';
+import Text from '../misc/Text';
+import NavigationEndpoint from '../NavigationEndpoint';
+
+class MusicMultiSelectMenuItem extends YTNode {
+  static type = 'MusicMultiSelectMenuItem';
+
+  title: string;
+  form_item_entity_key: string;
+  selected_icon_type: string;
+  endpoint?: NavigationEndpoint;
+  selected: boolean;
+
+  constructor(data: any) {
+    super();
+
+    this.title = new Text(data.title).text;
+    this.form_item_entity_key = data.formItemEntityKey;
+    this.selected_icon_type = data.selectedIcon?.iconType || null;
+    const command = data.selectedCommand?.commandExecutorCommand?.commands?.find((command: any) => command.musicBrowseFormBinderCommand?.browseEndpoint);
+    if (command) {
+      /**
+       * At this point, endpoint will still be missing `form_data` field which is required for
+       * selection to take effect. This can only be obtained from the response data which
+       * we don't have here. We shall delegate this task back to `Parser`.
+       */
+      this.endpoint = new NavigationEndpoint(command.musicBrowseFormBinderCommand);
+    }
+    /**
+     * Inferring selected state from existence of endpoint. `Parser` shall
+     * update this with the definitive value obtained from response data.
+     */
+    this.selected = !!this.endpoint;
+  }
+}
+
+export default MusicMultiSelectMenuItem;