gmail monitor and filesender

gistfile1.txt

/* PayPal Shop with Apps Script */

/* Written by Amit Agarwal - ctrlq.org */

/* http://www.labnol.org/internet/sell-digital-products-online/28554/ */


PAYPAL = [
  ["product-001", "useful-websites-book.pdf"],
  ["product-002", "linux-training-course.mp4"],
  ["product-003", "steve-audio-book.mp3"],
  ["product-004", "presentation-template.ppt"]
];

function PayPal() {
  ScriptApp.newTrigger("myShop").timeBased().everyMinutes(5).create();
}

function myShop() {
  
  var file, size, files, threads;
  
  for (var p in PAYPAL) {
    
    threads = GmailApp.search("is:unread from:paypal " + PAYPAL[p][0]);
    
    if (threads.length > 0) {
      
      files = DriveApp.searchFiles('title contains "' + PAYPAL[p][1] + '"');
      
      if (files.hasNext()) {
        
        file = files.next();
        size = file.getSize()/(1024*1024);
        
        for (var i=0; i<threads.length; i++) {   
          
          var buyer   = threads[i].getMessages()[0].getReplyTo();
          var subject = "Thank you for your purchase";
          var body    = "Please download the file using the link below.\n\n";
          
          if (size > 20) {
            file.addViewer(buyer);
            GmailApp.sendEmail(buyer, subject, body + file.getUrl());
          } else {
            GmailApp.sendEmail(buyer, subject, body, {attachments: file.getBlob()});
          }
          
          threads[i].markRead().moveToArchive();
        }
      }
    }
  }
}