v0.0.4

cloudfunctions/userList/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
+
+// Discover other users to follow. Optional keyword filters by nickname.
+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 keyword = String(event.keyword || '').trim()
+
+  const where = { _id: _.neq(meId) }
+  if (keyword) where.nickname = db.RegExp({ regexp: keyword, options: 'i' })
+
+  const usersRes = await db.collection('users')
+    .where(where)
+    .orderBy('lastLoginAt', 'desc')
+    .limit(30)
+    .get()
+
+  const safeFollows = where2 =>
+    db.collection('follows').where(where2).limit(500).get().catch(() => ({ data: [] }))
+  const [followingRes, followerRes] = await Promise.all([
+    safeFollows({ followerId: meId }),
+    safeFollows({ followeeId: meId })
+  ])
+  const followingSet = new Set(followingRes.data.map(f => f.followeeId))
+  const followerSet = new Set(followerRes.data.map(f => f.followerId))
+
+  const list = usersRes.data.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 }
+}

cloudfunctions/userList/package.json

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