feat: 开发收藏和下载功能

2026-05-06 18:32:15 +08:00
parent 9bdf850f20
commit c0b1bfddb0
17 changed files with 1262 additions and 127 deletions
@@ -0,0 +1,98 @@
+const cloud = require('wx-server-sdk');
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV });
+
+const db = cloud.database();
+const command = db.command;
+
+exports.main = async (event) => {
+    const wxContext = cloud.getWXContext();
+    const openid = wxContext.OPENID;
+
+    // 获取 userId
+    const { data: users } = await db
+        .collection('users')
+        .where({ openid })
+        .limit(1)
+        .get();
+
+    if (users.length === 0) {
+        return { code: -1, message: '用户未登录' };
+    }
+
+    const userId = users[0]._id;
+    const { action } = event;
+
+    switch (action) {
+        case 'add':
+            return await handleAdd(userId, event);
+        case 'list':
+            return await handleList(userId, event);
+        default:
+            return { code: -1, message: '未知操作' };
+    }
+};
+
+async function handleAdd(userId, event) {
+    const { worksheetId } = event;
+    if (!worksheetId) return { code: -1, message: 'worksheetId 不能为空' };
+
+    const collection = db.collection('download_logs');
+
+    const record = {
+        userId,
+        worksheetId,
+        createdAt: db.serverDate(),
+    };
+    const { _id } = await collection.add({ data: record });
+
+    // worksheets.downloads +1
+    try {
+        await db.collection('worksheets').doc(worksheetId).update({
+            data: {
+                downloads: command.inc(1),
+                updatedAt: db.serverDate(),
+            },
+        });
+    } catch (e) {
+        console.warn('更新 worksheets.downloads 失败', e);
+    }
+
+    return { code: 0, data: { _id, ...record } };
+}
+
+async function handleList(userId, event) {
+    const { page = 1, pageSize = 20 } = event;
+    const skip = (page - 1) * pageSize;
+
+    const collection = db.collection('download_logs');
+
+    const { data: logs } = await collection
+        .where({ userId })
+        .orderBy('createdAt', 'desc')
+        .skip(skip)
+        .limit(pageSize)
+        .get();
+
+    if (logs.length === 0) {
+        return { code: 0, data: [] };
+    }
+
+    // 关联查询 worksheets 信息
+    const worksheetIds = [...new Set(logs.map((l) => l.worksheetId))];
+    const { data: worksheets } = await db
+        .collection('worksheets')
+        .where({ _id: command.in(worksheetIds) })
+        .get();
+
+    const worksheetMap = {};
+    worksheets.forEach((w) => {
+        worksheetMap[w._id] = w;
+    });
+
+    const result = logs.map((l) => ({
+        ...l,
+        worksheet: worksheetMap[l.worksheetId] || null,
+    }));
+
+    return { code: 0, data: result };
+}
@@ -0,0 +1,8 @@
+{
+    "name": "user-download-logs",
+    "version": "1.0.0",
+    "main": "index.js",
+    "dependencies": {
+        "wx-server-sdk": "^3.0.4"
+    }
+}