feat: add YouTube livechat renderers

Next up: refactor old livechat parser

lib/parser/contents/classes/LiveChat.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const Parser = require('..');
+const Text = require('./Text');
+
+class LiveChat {
+  type = 'LiveChat';
+  
+  constructor(data) {
+    this.header = Parser.parse(data.header);
+    
+    this.initial_display_state = data.initialDisplayState;
+    this.continuation = data.continuations[0]?.reloadContinuationData?.continuation;
+ 
+    this.client_messages = {
+      reconnect_message: new Text(data.clientMessages.reconnectMessage),
+      unable_to_reconnect_message: new Text(data.clientMessages.unableToReconnectMessage),
+      fatal_error: new Text(data.clientMessages.fatalError),
+      reconnected_message: new Text(data.clientMessages.reconnectedMessage),
+      generic_error: new Text(data.clientMessages.genericError)
+    };
+  }
+}
+
+module.exports = LiveChat;

lib/parser/contents/classes/LiveChatHeader.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const Parser = require('..');
+
+class LiveChatHeader {
+  type = 'LiveChatHeader';
+  
+  constructor(data) {
+    this.overflow_menu = Parser.parse(data.overflowMenu);
+    this.collapse_button = Parser.parse(data.collapseButton);
+    this.view_selector = Parser.parse(data.viewSelector);
+  }
+}
+
+module.exports = LiveChatHeader;

lib/parser/contents/classes/SortFilterSubMenu.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const { observe } = require('../../../utils/Utils');
+
+class SortFilterSubMenu {
+  type = 'SortFilterSubMenu';
+  
+  constructor(data) {
+    this.sub_menu_items = observe(data.subMenuItems.map((item) => ({
+      title: item.title,
+      selected: item.selected,
+      continuation: item.continuation?.reloadContinuationData.continuation,
+      subtitle: item.subtitle
+    })));
+    
+    this.label = data.accessibility.accessibilityData.label;
+  }
+}
+
+module.exports = SortFilterSubMenu;