Auto-management of receipts and shipping notifications

staged.js

function handleStaged() {
  Logger.log("Starting...")
  handleStagedShipping();
  handleStagedReceipts();
  Logger.log("Done.")
}

function handleStagedReceipts() {
  var getLabel = GmailApp.getUserLabelByName('_Stage/Receipts');
  var setLabel = GmailApp.getUserLabelByName('Receipts');
  var recipient = '[email protected]';
  
  var threads = getLabel.getThreads();
  var forwarded = 0;
  for (var i = 0; i < threads.length; i++) {
    var thread = threads[i];
    var message = thread.getMessages()[0];
    var from = message.getFrom();
    Logger.log("From: %s", from)
    if (from.indexOf('[email protected]') > 0) {
      message.forward(recipient);
      forwarded++;
    }
    thread.addLabel(setLabel);
    thread.removeLabel(getLabel);
  }
  
  Logger.log("%s receipts handled, %s forwarded", threads.length, forwarded);
}

function handleStagedShipping() {
  var getLabel = GmailApp.getUserLabelByName('_Stage/Shipping');
  var setLabel = GmailApp.getUserLabelByName('Shipping');
  var recipient = '[email protected]';
  
  var threads = getLabel.getThreads();
  var forwarded = 0;
  for (var i = 0; i < threads.length; i++) {
    var thread = threads[i];
    var message = thread.getMessages()[0];
    var from = message.getFrom();
    if (from.indexOf('[email protected]') === -1) {
      message.forward(recipient);
      forwarded++;
    }
    thread.addLabel(setLabel);
    thread.removeLabel(getLabel);
  }
  
  Logger.log("%s shipping emails handled, %s forwarded", threads.length, forwarded);
}