将附件从 Gmail 复制到 Google Drive 文件夹并使用 Apps 脚本覆盖旧文件

如何解决将附件从 Gmail 复制到 Google Drive 文件夹并使用 Apps 脚本覆盖旧文件

我正在尝试使用 Google Apps 脚本自动将附件从 Gmail 收件箱下载到帐户的 Google 云端硬盘上的特定文件夹。我发现下面的代码可以很好地完成该部分，但我还需要它用新文件覆盖同名文件或删除旧文件并在其位置上传新文件。此外，当我只需要复制 .xlsx 文件时，它似乎仍在从包含多个附件的电子邮件中下载所有文件类型。任何帮助将非常感激。（代码归功于 googleappsscript.org）

// GLOBALS
//Array of file extension which you would like to extract to Drive
var fileTypestoExtract = ['jpg','tif','png','gif','bmp','svg'];
//Name of the folder in google drive i which files will be put
var folderName = 'GmailToDrive';
//Name of the label which will be applied after processing the mail message
var labelName = '@indrive';



function GmailToDrive(){
  //build query to search emails
  var query = '';
  //filename:jpg OR filename:tif OR filename:gif OR fileName:png OR filename:bmp OR filename:svg'; //'after:'+getDateNDaysBack_(1)+
  for(var i in fileTypestoExtract){
    query += (query === '' ?('filename:'+fileTypestoExtract[i]) : (' OR filename:'+fileTypestoExtract[i]));
  }
  query = 'in:inBox has:nouserlabels ' + query;
//  query += ' after:'+getDateNDaysBack_(1);
  var threads = GmailApp.search(query);
  var label = getGmailLabel_(labelName);
  var parentFolder;
  if(threads.length > 0){
    parentFolder = getFolder_(folderName);
  }
  var root = DriveApp.getRootFolder();
  for(var i in threads){
    var mesgs = threads[i].getMessages();
    for(var j in mesgs){
      //get attachments
      var attachments = mesgs[j].getAttachments();
      for(var k in attachments){
        var attachment = attachments[k];
//      var isDefinedType = checkIfDefinedType_(attachment);
//      if(!isDefinedType) continue;
        var attachmentBlob = attachment.copyBlob();
        var file = DriveApp.createFile(attachmentBlob);
        parentFolder.addFile(file);
        root.removeFile(file);
      }
    }
    threads[i].addLabel(label);
  }
}

//This function will get the parent folder in Google drive
function getFolder_(folderName){
  var folder;
  var fi = DriveApp.getFoldersByName(folderName);
  if(fi.hasNext()){
    folder = fi.next();
  }
  else{
    folder = DriveApp.createFolder(folderName);
  }
  return folder;
}

//getDate n days back
// n must be integer
function getDateNDaysBack_(n){
  n = parseInt(n);
  var date = new Date();
  date.setDate(date.getDate() - n);
  return Utilities.formatDate(date,Session.getScriptTimeZone(),'yyyy/MM/dd');
}

function getGmailLabel_(name){
  var label = GmailApp.getUserLabelByName(name);
  if(!label){
    label = GmailApp.createLabel(name);
  }
  return label;
}

//this function will check for filextension type.
// and return boolean
function checkIfDefinedType_(attachment){
  var fileName = attachment.getName();
  var temp = fileName.split('.');
  var fileExtension = temp[temp.length-1].toLowerCase();
  if(fileTypestoExtract.indexOf(fileExtension) !== -1) return true;
  else return false;
}

解决方法

这是一个示例代码：

// GLOBALS
//Array of file extension which you would like to extract to Drive
var fileTypesToExtract = ['xlsx'];
//Name of the folder in google drive i which files will be put
var folderName = 'GmailToDrive';
//Name of the label which will be applied after processing the mail message
var labelName = '@indrive';

function GmailToDrive() {
  var query = '';

  for(var i in fileTypesToExtract){
    query += (query === '' ?('filename:'+fileTypesToExtract[i]) : (' OR filename:'+fileTypesToExtract[i]));
  }
  query = 'in:inbox has:nouserlabels ' + query;
  Logger.log(query);

  var threads = GmailApp.search(query);
  var label = getGmailLabel_(labelName);
  var parentFolder = getFolder_(folderName);

  for(var i in threads){
    var mesgs = threads[i].getMessages();
    for(var j in mesgs){
      //get attachments
      var attachments = mesgs[j].getAttachments();
      for(var k in attachments){
        var attachment = attachments[k];
        Logger.log(attachment.getName());
        Logger.log(attachment.getContentType())

        //Check if attached file is xlsx file
        if(attachment.getContentType() == MimeType.MICROSOFT_EXCEL){
          var attachmentBlob = attachment.copyBlob();

          //Check if filename exist in the drive folder then remove the file
          var files = parentFolder.getFilesByName(attachment.getName());
          while (files.hasNext()) {
            var file = files.next();
            Logger.log("FILE EXIST. Removing.....");
            //Remove existing file
            file.setTrashed(true);
          }
          
          //Create a new file in the drive folder
          var newFile = parentFolder.createFile(attachmentBlob);
        }
      }
    }
    threads[i].addLabel(label);
  }
}

function getGmailLabel_(name){
  var label = GmailApp.getUserLabelByName(name);
  if(!label){
    label = GmailApp.createLabel(name);
  }
  return label;
}

//This function will get the parent folder in Google drive
function getFolder_(folderName){
  var folder;
  var fi = DriveApp.getFoldersByName(folderName);
  if(fi.hasNext()){
    folder = fi.next();
  }
  else{
    folder = DriveApp.createFolder(folderName);
  }
  return folder;
}

修改完成：

替换 fileTypesToExtract 以提取 .xlsx 个文件
使用 GmailAttachment.getContentType() 检查当前附件是否为 xlsx 文件
包括使用 Folder.getFilesByName(name) 检查当前附件是否存在于驱动器文件夹中。然后使用 File.setTrashed(trashed)
使用 Folder.createFile(blob)

在您的脚本中，您注释掉了 inDefinedType 功能。

关于替换文件内容或删除同名文件，您可以

使用 getFilesByName() 查找 parentFolder 中的所有文件并删除所有旧文件。