feat: 3.5版本规划

cloudfunctions/userDownloadLogs/index.js

@@ -36,13 +36,26 @@ exports.main = async (event) => {
 
 async function handleAdd(userId, event) {
     const { worksheetId } = event;
+    const exportId = String(event.exportId || '').trim();
     if (!worksheetId) return { code: -1, message: 'worksheetId 不能为空' };
 
     const collection = db.collection('download_logs');
 
+    // 同一次成功导出重试时只能计一次，避免网络重试抬高下载量。
+    if (exportId) {
+        const { data: existing } = await collection
+            .where({ userId, exportId })
+            .limit(1)
+            .get();
+        if (existing.length > 0) {
+            return { code: 0, data: { ...existing[0], duplicate: true } };
+        }
+    }
+
     const record = {
         userId,
         worksheetId,
+        ...(exportId && { exportId }),
         createdAt: db.serverDate(),
     };
     const { _id } = await collection.add({ data: record });