Google App Script for Copying Attachments from a Gmail Message to Your Google Drive

gmail2gdrive.gs

/**************************************************************************************
*  Gmail to Google Drive Template v1.0.0
*  Short Desc.:
*   - Google App Script for Copying Attachments from a Gmail Message to Your Google Drive
*  Description:
*   - Search first email thread that matches the subject and has attachement(s), then make a copy of all the attachments to a specific Google Drive folder.
*  Services:
*   - Gmail
*   - Drive
*  Author: Chris KY Fung
*  Created: 2019-06-19
*  Website: https://gist.github.com/chriskyfung/196f56bbee4d7ac93b55b4ac6ab71659
***************************************************************************************/

function gmail2gdrive() {
  // Please define a concise search query for searching your target email
  var search_query = 'from:example.com subject:"keywords" has:attachment'
  // Please your target attachment filename and destination folder ID
  var filename = '';
  var foldId = '';
  
  // Find the first email thread that matches with the specified search query
  var thread = GmailApp.search( search_query , 0, 1)[0];
  var message = thread.getMessages()[0];
  var subject = message.getSubject();
  var attachments = message.getAttachments();
  
  // Make a copy of all email attachments to the specific Google Drive Folder
  if (foldId) {
    var dest = DriveApp.getFolderById(foldId);
  } else {
    var dest = DriveApp;
  }
  var i;
  for ( i = 0; i < attachments.length; i++) {
    dest.createFile(attachments[i].copyBlob());
  }
}