v0.0.4

cloudfunctions/followList/index.js

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+const cloud = require('wx-server-sdk')
+
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+const db = cloud.database()
+const _ = db.command
+
+async function fetchUsers(ids) {
+  if (!ids.length) return []
+  const out = []
+  // _.in supports up to ~100 values; chunk to be safe
+  for (let i = 0; i < ids.length; i += 100) {
+    const chunk = ids.slice(i, i + 100)
+    const res = await db.collection('users').where({ _id: _.in(chunk) }).limit(100).get()
+    out.push(...res.data)
+  }
+  return out
+}
+
+exports.main = async event => {
+  const { OPENID } = cloud.getWXContext()
+  if (!OPENID) throw new Error('no openid in wx context')
+  const meRes = await db.collection('users').where({ openid: OPENID }).limit(1).get()
+  if (!meRes.data.length) throw new Error('user not found')
+  const meId = meRes.data[0]._id
+  const type = event.type || 'friends'
+
+  const safeFollows = where =>
+    db.collection('follows').where(where).limit(500).get().catch(() => ({ data: [] }))
+  const [followingRes, followerRes] = await Promise.all([
+    safeFollows({ followerId: meId }),
+    safeFollows({ followeeId: meId })
+  ])
+  const followingIds = followingRes.data.map(f => f.followeeId)
+  const followerIds = followerRes.data.map(f => f.followerId)
+  const followingSet = new Set(followingIds)
+  const followerSet = new Set(followerIds)
+  const friendIds = followingIds.filter(id => followerSet.has(id))
+
+  let ids = friendIds
+  if (type === 'following') ids = followingIds
+  else if (type === 'followers') ids = followerIds
+
+  const users = await fetchUsers(ids)
+  const list = users.map(u => ({
+    id: u._id,
+    name: u.nickname || '用户',
+    handle: u.handle || '',
+    avatarKey: u.avatarKey || 'gradient-avatar-1',
+    avatarUrl: u.avatarUrl || '',
+    bio: u.bio || '',
+    isFollowing: followingSet.has(u._id),
+    isFriend: followingSet.has(u._id) && followerSet.has(u._id)
+  }))
+
+  return {
+    list,
+    counts: {
+      following: followingIds.length,
+      followers: followerIds.length,
+      friends: friendIds.length
+    }
+  }
+}

cloudfunctions/followList/package.json

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+{
+  "name": "followList",
+  "version": "1.0.0",
+  "main": "index.js",
+  "dependencies": {
+    "wx-server-sdk": "latest"
+  }
+}