feat(parser): Update LiveChatTextMessage

Update `LiveChatTextMessage` to extend `YTNode` rather than
`LiveChatMessageBase` to better align with the latest data
provided by Innertube.

- Add `timestamp_usec` property
- Add `timestamp_text` property
- Add `context_menu_accessibility_label` property
- Add `before_content_buttons` property

src/parser/classes/livechat/items/LiveChatTextMessage.ts

@@ -2,35 +2,36 @@ import { type ObservedArray, YTNode } from '../../../helpers.js';
 import type { RawNode } from '../../../index.js';
 import { Parser } from '../../../index.js';
 import Button from '../../Button.js';
+import ButtonView from '../../ButtonView.js';
 import NavigationEndpoint from '../../NavigationEndpoint.js';
 import Author from '../../misc/Author.js';
 import Text from '../../misc/Text.js';
 
-export class LiveChatMessageBase extends YTNode {
-  static type = 'LiveChatMessageBase';
+export default class LiveChatTextMessage extends YTNode {
+  static type = 'LiveChatTextMessage';
 
+  id: string;
   message: Text;
   inline_action_buttons: ObservedArray<Button>;
   timestamp: number;
-  id: string;
+  timestamp_usec: number;
+  timestamp_text?: string;
+  author: Author;
+  menu_endpoint: NavigationEndpoint;
+  context_menu_accessibility_label: string;
+  before_content_buttons: ObservedArray<ButtonView>;
 
   constructor(data: RawNode) {
     super();
+    this.id = data.id;
     this.message = new Text(data.message);
     this.inline_action_buttons = Parser.parseArray(data.inlineActionButtons, Button);
     this.timestamp = Math.floor(parseInt(data.timestampUsec) / 1000);
-    this.id = data.id;
-  }
-}
-
-export default class LiveChatTextMessage extends LiveChatMessageBase {
-  static type = 'LiveChatTextMessage';
+    this.timestamp_usec = data.timestampUsec;
 
-  author: Author;
-  menu_endpoint: NavigationEndpoint;
-
-  constructor(data: RawNode) {
-    super(data);
+    if (Reflect.has(data, 'timestampText')) {
+      this.timestamp_text = new Text(data.timestampText).toString();
+    }
 
     this.author = new Author(
       data.authorName,
@@ -40,5 +41,7 @@ export default class LiveChatTextMessage extends LiveChatMessageBase {
     );
 
     this.menu_endpoint = new NavigationEndpoint(data.contextMenuEndpoint);
+    this.context_menu_accessibility_label = data.contextMenuAccessibility.accessibilityData.label;
+    this.before_content_buttons = Parser.parseArray(data.beforeContentButtons, ButtonView);
   }
 }