feat(video-search): add video search

src/routes/videos.ts

@@ -0,0 +1,47 @@
+import express from 'express';
+import { BaseChatModel } from '@langchain/core/language_models/chat_models';
+import { getAvailableProviders } from '../lib/providers';
+import { getChatModel, getChatModelProvider } from '../config';
+import { HumanMessage, AIMessage } from '@langchain/core/messages';
+import logger from '../utils/logger';
+import handleVideoSearch from '../agents/videoSearchAgent';
+
+const router = express.Router();
+
+router.post('/', async (req, res) => {
+  try {
+    let { query, chat_history } = req.body;
+
+    chat_history = chat_history.map((msg: any) => {
+      if (msg.role === 'user') {
+        return new HumanMessage(msg.content);
+      } else if (msg.role === 'assistant') {
+        return new AIMessage(msg.content);
+      }
+    });
+
+    const models = await getAvailableProviders();
+    const provider = getChatModelProvider();
+    const chatModel = getChatModel();
+
+    let llm: BaseChatModel | undefined;
+
+    if (models[provider] && models[provider][chatModel]) {
+      llm = models[provider][chatModel] as BaseChatModel | undefined;
+    }
+
+    if (!llm) {
+      res.status(500).json({ message: 'Invalid LLM model selected' });
+      return;
+    }
+
+    const videos = await handleVideoSearch({ chat_history, query }, llm);
+
+    res.status(200).json({ videos });
+  } catch (err) {
+    res.status(500).json({ message: 'An error has occurred.' });
+    logger.error(`Error in video search: ${err.message}`);
+  }
+});
+
+export default router;