perf: completions api.fix: new chat question guide (#361)

projects/app/src/pages/api/v1/chat/getHistory.ts

@@ -0,0 +1,75 @@
+// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { jsonRes } from '@/service/response';
+import { authUser } from '@/service/utils/auth';
+import { connectToDatabase, ChatItem } from '@/service/mongo';
+import { Types } from 'mongoose';
+import type { ChatItemType } from '@/types/chat';
+
+export type Props = {
+  appId?: string;
+  chatId?: string;
+  limit?: number;
+};
+export type Response = { history: ChatItemType[] };
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  try {
+    await connectToDatabase();
+    const { userId } = await authUser({ req, authToken: true });
+    const { chatId, limit } = req.body as Props;
+
+    jsonRes<Response>(res, {
+      data: await getChatHistory({
+        chatId,
+        userId,
+        limit
+      })
+    });
+  } catch (err) {
+    jsonRes(res, {
+      code: 500,
+      error: err
+    });
+  }
+}
+
+export async function getChatHistory({
+  chatId,
+  userId,
+  appId,
+  limit = 30
+}: Props & { userId: string }): Promise<Response> {
+  if (!chatId || !appId) {
+    return { history: [] };
+  }
+
+  const history = await ChatItem.aggregate([
+    {
+      $match: {
+        chatId,
+        appId: new Types.ObjectId(appId),
+        userId: new Types.ObjectId(userId)
+      }
+    },
+    {
+      $sort: {
+        _id: -1
+      }
+    },
+    {
+      $limit: limit
+    },
+    {
+      $project: {
+        dataId: 1,
+        obj: 1,
+        value: 1
+      }
+    }
+  ]);
+
+  history.reverse();
+
+  return { history };
+}