fix: Fix parsing of markdown messages in chat history

Author: tjtanjin

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Tan Jin (tjtanjin)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

package-lock.json

@@ -45,7 +45,7 @@
   "peerDependencies": {
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "react-chatbotify": "^2.0.0-beta.29"
+    "react-chatbotify": "^2.0.0-beta.31"
   },
   "devDependencies": {
     "@eslint/js": "^9.20.0",

package.json

@@ -6,6 +6,9 @@ import {
 	RcbPreInjectMessageEvent,
 	Plugin,
 	RcbStartStreamMessageEvent,
+	useMessages,
+	useChatHistory,
+	useSettings,
 } from "react-chatbotify";
 
 import MarkdownWrapper from "../components/MarkdownWrapper";
@@ -21,12 +24,28 @@ import { shouldRenderMarkdown } from "../utils/renderConditionHelper";
 const useRcbPlugin = (pluginConfig?: PluginConfig) => {
 	const { getBotId } = useBotId();
 	const { getFlow } = useFlow();
+	const { messages, replaceMessages } = useMessages();
+	const { settings } = useSettings();
+	const { hasChatHistoryLoaded } = useChatHistory();
 
 	const mergedPluginConfig = { ...pluginConfig, ...DefaultPluginConfig };
 
 	// if custom component provided, use it; otherwise defaults to react-markdown
 	const component = mergedPluginConfig.markdownComponent ? mergedPluginConfig.markdownComponent : MarkdownWrapper;
 
+	useEffect(() => {
+		if (hasChatHistoryLoaded) {
+			const messagesCopy = [...messages];
+			for (let i = 0; i < messagesCopy.length && i < (settings.chatHistory?.maxEntries ?? 30); i++) {
+				const message = messagesCopy[i];
+				if (message.tags?.includes("rcb-markdown-renderer-plugin:parsed")) {
+				message.contentWrapper = component;
+				}
+			}
+			replaceMessages(messagesCopy);
+		}
+	}, [hasChatHistoryLoaded]);
+
 	useEffect(() => {
 		/**
 		 * Handles message events and adds wrapper to render markdown if applicable.
@@ -45,6 +64,10 @@ const useRcbPlugin = (pluginConfig?: PluginConfig) => {
 
 
 			event.data.message.contentWrapper = component;
+			if (!event.data.message.tags) {
+				event.data.message.tags = [];
+			}
+			event.data.message.tags.push("rcb-markdown-renderer-plugin:parsed");
 		};
 
 		// adds required events