gistfile1.txt

// This script searches Gmail for conversations where I never received a response
// and puts them in a NoResponse label 

var DAYS_TO_SEARCH = 7; // look only in sent messages from last 7 days, otherwise script takes a while
var SINGLE_MESSAGE_ONLY = false; // exclude multi-message conversations where I sent the last message? 

function label_messages_without_response() {
  var emailAddress = Session.getEffectiveUser().getEmail();
  Logger.log(emailAddress);
  var EMAIL_REGEX = /[a-zA-Z0-9\._\-]+@[a-zA-Z0-9\.\-]+\.[a-z\.A-Z]+/g;
  var label = GmailApp.createLabel("AwaitingResponse");
  var d = new Date();
  d.setDate(d.getDate() - DAYS_TO_SEARCH);
  var dateString = d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getDate();
  threads = GmailApp.search("in:Sent after:" + dateString);
  for (var i = 0; i < threads.length; i++)
  {
    var thread = threads[i];
    if (!SINGLE_MESSAGE_ONLY || thread.getMessageCount() == 1)
    {
      var lastMessage = thread.getMessages()[thread.getMessageCount()-1];
      lastMessageSender = lastMessage.getFrom().match(EMAIL_REGEX)[0];
      if (lastMessageSender == emailAddress)
      {
      thread.addLabel(label);
      Logger.log(lastMessageSender);
      }
    }
  }
}