full

utils/followHelpers.js

@@ -0,0 +1,46 @@
+const UserFollowModel = require('../models/UserFollowModel')
+const UserModel = require('../models/UserModel')
+
+async function getFollowCounts (userId) {
+  const [followersCount, followingCount] = await Promise.all([
+    UserFollowModel.countDocuments({ followingId: userId }),
+    UserFollowModel.countDocuments({ followerId: userId })
+  ])
+  return { followersCount, followingCount }
+}
+
+async function mapFollowUsers (ids, viewerId) {
+  if (!ids.length) return []
+  const users = await UserModel.find({ _id: { $in: ids } })
+    .select('_id user_name first_name last_name profile_image is_verified verify_badge account_status')
+    .lean()
+  const byId = Object.fromEntries(users.map((u) => [String(u._id), u]))
+
+  let followingSet = new Set()
+  if (viewerId) {
+    const rows = await UserFollowModel.find({
+      followerId: viewerId,
+      followingId: { $in: ids }
+    }).select('followingId').lean()
+    followingSet = new Set(rows.map((r) => String(r.followingId)))
+  }
+
+  return ids
+    .map((id) => byId[String(id)])
+    .filter(Boolean)
+    .map((u) => ({
+      _id: String(u._id),
+      user_name: u.user_name || '',
+      first_name: u.first_name || '',
+      last_name: u.last_name || '',
+      profile_image: u.profile_image || '',
+      is_verified: u.is_verified || 'none',
+      verify_badge: u.verify_badge || 'none',
+      is_following: followingSet.has(String(u._id))
+    }))
+}
+
+module.exports = {
+  getFollowCounts,
+  mapFollowUsers
+}