Out of Office Autoreply - Google Scripts

ooo_autoreply.js

// Out of Office Autoreply - Google Script code by Evan Weinberg (Twitter: @emwdx)
// This code was based on the code for the google script autoreply post here on stack overflow: https://stackoverflow.com/questions/38955161/google-gmail-script-time-auto-reply


function autoReply() {
var interval = 5;  //  Set to the number of minutes between runs of this script. You set this also in the trigger settings through the stop-watch tab.
var daysOff = [0,6]
var weekdayMessageDays = [1, 2, 3, 4, 5]  // 1=Mo, 2=Tu, 3=We, 4=Th, 5=Fr, 6=Sa, 0=Su
var workingHours = [8,17]; // 0-24

//Set your messages here.
var weekdayMessage = "***This was sent by a robot!*** \n\n Hello, \n\n Thank you for your message. To maintain work/life balance, I am responding to email between 8 AM and 5 PM during the week. I will get back to you after 8:00 AM tomorrow. \n\n Thanks for understanding. \n\n EMW ";

var weekendMessage = "***This was sent by a robot!*** \n\n Hello, \n\n Thank you for your message. To maintain work/life balance, I am responding to email between 8 AM and 5 PM during the week. I will get back to you after 8:00 AM on Monday. \n\n Thanks for understanding. \n\n EMW ";

var mondayMessage = "***This was sent by a robot!*** \n\n Hello, \n\n Thank you for your message. To maintain work/life balance, I am responding to email between 8 AM and 5 PM during the week. I will get back to you after 8:00 AM today. \n\n Thanks for understanding. \n\n EMW "

  var date = new Date();
  var day = date.getDay();
  var hour = date.getHours();
  var isWorkday = (daysOff.indexOf(day) == -1)
  var isOutsideHours = (hour < workingHours[0]||hour >= workingHours[1])
  var sendAutoreply = !isWorkday || isOutsideHours
  var sentMessage = ""

  //You can send two different messages for weekdays and weekends.
  if(weekdayMessageDays.indexOf(day)!=-1){
    //Send the weekend message if it is Friday after the end of working hours.
    if(day == 5 && hour >= workingHours[1]){
      sentMessage = weekendMessage
    }
    if(day == 1 && hour < workingHours[0]){
      sentMessage = mondayMessage
    }
    //Otherwise send the weekday message.
    else{
        sentMessage = weekdayMessage
    }
  
  }
  else{
    sentMessage = weekendMessage
  }

  if (sendAutoreply) {
   var timeFrom = Math.floor(date.valueOf()/1000) - 60 * interval;
   var threads = GmailApp.search('is:inbox after:' + timeFrom);
   for (var i = 0; i < threads.length; i++) {

      if (threads[i].isUnread()){
      var senderEmail = threads[i].getMessages()[0].getFrom().split("@")[1]

      //Set the filter domain you want to use, if any, in the next line, but keep the asterisk. This is because of the way I get the domain from the string in line 36. 
      var isFromDomain = /my-work-email.com*/.test(senderEmail) // You can also just set isFromDomain to 1 to reply to emails from all domains.

      if(isFromDomain){
          threads[i].reply(sentMessage)

      }  
      
      }
    }
  }

}