Fixed user data download file generation (#11190)

Author: Hudell

packages/rocketchat-user-data-download/server/cronProcessDownloads.js

@@ -319,7 +319,14 @@ const sendEmail = function(userId) {
 };
 
 const makeZipFile = function(exportOperation) {
+	createDir(zipFolder);
+
 	const targetFile = path.join(zipFolder, `${ exportOperation.userId }.zip`);
+	if (fs.existsSync(targetFile)) {
+		exportOperation.status = 'uploading';
+		return;
+	}
+
 	const output = fs.createWriteStream(targetFile);
 
 	exportOperation.generatedFile = targetFile;
@@ -424,14 +431,18 @@ const continueExportOperation = function(exportOperation) {
 			});
 
 			if (isDownloadFinished(exportOperation)) {
+				const targetFile = path.join(zipFolder, `${ exportOperation.userId }.zip`);
+				if (fs.existsSync(targetFile)) {
+					fs.unlinkSync(targetFile);
+				}
+
 				exportOperation.status = 'compressing';
 				return;
 			}
 		}
 
 		if (exportOperation.status === 'compressing') {
 			makeZipFile(exportOperation);
-			exportOperation.status = 'uploading';
 			return;
 		}