Initial commit

cloudfunctions/getPosts/index.js

@@ -0,0 +1,83 @@
+const cloud = require('wx-server-sdk')
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+const db = cloud.database()
+const _ = db.command
+const PAGE_SIZE = 10
+
+exports.main = async (event, context) => {
+  const { OPENID } = cloud.getWXContext()
+  const { page = 0, type = 'hot', userId, latitude, longitude } = event
+
+  try {
+    let query = db.collection('posts')
+    const skip = page * PAGE_SIZE
+
+    if (userId) {
+      // 某用户的帖子
+      query = query.where({ authorId: userId })
+    } else if (type === 'feed') {
+      // 关注的用户帖子
+      const followsRes = await db.collection('follows')
+        .where({ followerId: OPENID })
+        .field({ followeeId: true })
+        .get()
+      const followeeIds = followsRes.data.map(f => f.followeeId)
+      followeeIds.push(OPENID)
+      query = query.where({ authorId: _.in(followeeIds) })
+    } else if (type === 'nearby' && latitude && longitude) {
+      // 附近帖子：使用地理围栏查询（简化版，用 geo_near）
+      query = query.where(
+        _.and([
+          { 'location.latitude': _.gt(latitude - 0.1) },
+          { 'location.latitude': _.lt(latitude + 0.1) },
+          { 'location.longitude': _.gt(longitude - 0.15) },
+          { 'location.longitude': _.lt(longitude + 0.15) },
+        ])
+      )
+    }
+    // type === 'hot' 全量按热度排序
+
+    const total = await query.count()
+    const postsRes = await query
+      .orderBy('createdAt', 'desc')
+      .skip(skip)
+      .limit(PAGE_SIZE)
+      .get()
+
+    const posts = postsRes.data
+
+    // 批量获取作者信息
+    const authorIds = [...new Set(posts.map(p => p.authorId))]
+    const authorsRes = await db.collection('users')
+      .where({ openid: _.in(authorIds) })
+      .field({ nickName: true, avatarUrl: true, openid: true, pets: true, location: true })
+      .get()
+    const authorMap = {}
+    authorsRes.data.forEach(u => { authorMap[u.openid] = u })
+
+    // 获取当前用户点赞状态
+    const postIds = posts.map(p => p._id)
+    const likesRes = await db.collection('likes')
+      .where({ userId: OPENID, postId: _.in(postIds) })
+      .field({ postId: true })
+      .get()
+    const likedSet = new Set(likesRes.data.map(l => l.postId))
+
+    const enriched = posts.map(p => ({
+      ...p,
+      author: authorMap[p.authorId] || null,
+      isLiked: likedSet.has(p._id),
+    }))
+
+    return {
+      code: 0,
+      data: {
+        list: enriched,
+        total: total.total,
+        hasMore: skip + posts.length < total.total,
+      },
+    }
+  } catch (e) {
+    return { code: -1, message: e.message }
+  }
+}