Feat: add user header with follow info

src/pages/api/users/[id]/followers.ts

@@ -0,0 +1,70 @@
+import { UserExtendedNextApiRequest } from '@/config/auth/types';
+import NextConnectOptions from '@/config/nextConnect/NextConnectOptions';
+import validateRequest from '@/config/nextConnect/middleware/validateRequest';
+import ServerError from '@/config/util/ServerError';
+import DBClient from '@/prisma/DBClient';
+import findUserById from '@/services/User/findUserById';
+import getUsersFollowingUser from '@/services/UserFollows/getUsersFollowingUser';
+import APIResponseValidationSchema from '@/validation/APIResponseValidationSchema';
+
+import { NextApiResponse } from 'next';
+import { createRouter } from 'next-connect';
+import { z } from 'zod';
+
+interface GetUserFollowInfoRequest extends UserExtendedNextApiRequest {
+  query: { id: string; page_size: string; page_num: string };
+}
+
+const router = createRouter<
+  GetUserFollowInfoRequest,
+  NextApiResponse<z.infer<typeof APIResponseValidationSchema>>
+>();
+
+const getFollowingInfo = async (
+  req: GetUserFollowInfoRequest,
+  res: NextApiResponse<z.infer<typeof APIResponseValidationSchema>>,
+) => {
+  // eslint-disable-next-line @typescript-eslint/naming-convention
+  const { id, page_num, page_size } = req.query;
+
+  const user = await findUserById(id);
+  if (!user) {
+    throw new ServerError('User not found', 404);
+  }
+
+  const pageNum = parseInt(page_num, 10);
+  const pageSize = parseInt(page_size, 10);
+
+  const following = await getUsersFollowingUser({
+    userId: id,
+    pageNum,
+    pageSize,
+  });
+  const followingCount = await DBClient.instance.userFollow.count({
+    where: { following: { id } },
+  });
+
+  res.setHeader('X-Total-Count', followingCount);
+
+  res.json({
+    message: 'Retrieved users that are followed by queried user',
+    payload: following,
+    success: true,
+    statusCode: 200,
+  });
+};
+
+router.get(
+  validateRequest({
+    querySchema: z.object({
+      id: z.string().cuid(),
+      page_size: z.string().regex(/^\d+$/),
+      page_num: z.string().regex(/^\d+$/),
+    }),
+  }),
+  getFollowingInfo,
+);
+
+const handler = router.handler(NextConnectOptions);
+
+export default handler;

src/pages/api/users/[id]/following.ts

@@ -0,0 +1,70 @@
+import { UserExtendedNextApiRequest } from '@/config/auth/types';
+import NextConnectOptions from '@/config/nextConnect/NextConnectOptions';
+import validateRequest from '@/config/nextConnect/middleware/validateRequest';
+import ServerError from '@/config/util/ServerError';
+import DBClient from '@/prisma/DBClient';
+import findUserById from '@/services/User/findUserById';
+import getUsersFollowedByUser from '@/services/UserFollows/getUsersFollowedByUser';
+import APIResponseValidationSchema from '@/validation/APIResponseValidationSchema';
+
+import { NextApiResponse } from 'next';
+import { createRouter } from 'next-connect';
+import { z } from 'zod';
+
+interface GetUserFollowInfoRequest extends UserExtendedNextApiRequest {
+  query: { id: string; page_size: string; page_num: string };
+}
+
+const router = createRouter<
+  GetUserFollowInfoRequest,
+  NextApiResponse<z.infer<typeof APIResponseValidationSchema>>
+>();
+
+const getFollowingInfo = async (
+  req: GetUserFollowInfoRequest,
+  res: NextApiResponse<z.infer<typeof APIResponseValidationSchema>>,
+) => {
+  // eslint-disable-next-line @typescript-eslint/naming-convention
+  const { id, page_num, page_size } = req.query;
+
+  const user = await findUserById(id);
+  if (!user) {
+    throw new ServerError('User not found', 404);
+  }
+
+  const pageNum = parseInt(page_num, 10);
+  const pageSize = parseInt(page_size, 10);
+
+  const following = await getUsersFollowedByUser({
+    userId: id,
+    pageNum,
+    pageSize,
+  });
+  const followingCount = await DBClient.instance.userFollow.count({
+    where: { follower: { id } },
+  });
+
+  res.setHeader('X-Total-Count', followingCount);
+
+  res.json({
+    message: 'Retrieved users that are followed by queried user',
+    payload: following,
+    success: true,
+    statusCode: 200,
+  });
+};
+
+router.get(
+  validateRequest({
+    querySchema: z.object({
+      id: z.string().cuid(),
+      page_size: z.string().regex(/^\d+$/),
+      page_num: z.string().regex(/^\d+$/),
+    }),
+  }),
+  getFollowingInfo,
+);
+
+const handler = router.handler(NextConnectOptions);
+
+export default handler;