41 lines
1.4 KiB
JavaScript
41 lines
1.4 KiB
JavaScript
const cloud = require('wx-server-sdk')
|
|
|
|
cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
|
|
const db = cloud.database()
|
|
|
|
// Count a collection safely — returns 0 if the collection does not exist yet.
|
|
async function safeCount(collection, where) {
|
|
try {
|
|
const res = await db.collection(collection).where(where).count()
|
|
return res.total || 0
|
|
} catch (e) {
|
|
return 0
|
|
}
|
|
}
|
|
|
|
// Derive live stats from the source collections so the displayed numbers are
|
|
// always accurate instead of relying on a stored field that can drift.
|
|
async function computeStats(user) {
|
|
const [posts, favorites, following, followers] = await Promise.all([
|
|
safeCount('posts', { authorId: user._id }),
|
|
safeCount('postFavorites', { openid: user.openid }),
|
|
safeCount('follows', { followerId: user._id }),
|
|
safeCount('follows', { followeeId: user._id })
|
|
])
|
|
return { posts, following, followers, favorites }
|
|
}
|
|
|
|
exports.main = async event => {
|
|
const { OPENID } = cloud.getWXContext()
|
|
if (!event.userId && !OPENID) throw new Error('no openid in wx context')
|
|
const query = event.userId ? { _id: event.userId } : { openid: OPENID }
|
|
const users = await db.collection('users').where(query).limit(1).get()
|
|
const user = users.data[0] || null
|
|
if (!user) return { user: null, pets: [] }
|
|
|
|
const pets = await db.collection('pets').where({ ownerId: user._id }).limit(20).get()
|
|
user.stats = await computeStats(user)
|
|
|
|
return { user, pets: pets.data }
|
|
}
|