Auto-archive past Gcal Invitations - for use in google apps scripts

gmailCalInvite-autoArchive.js

function findInvites(e) {
  console.log('Starting Calendar Archive');
  // Find all calendar invitations
  var threads = GmailApp.search("has:attachment .ics in:inbox");
  console.log('Found ' + threads.length + ' calendar invitations');

  for (var threadCounter = 0; threadCounter < threads.length; threadCounter++) {
    var messages = threads[threadCounter].getMessages();

    // iterate through each invit
    for (var messageCounter = 0; messageCounter < messages.length; messageCounter++) {

      // retrieve time info from subject line
      var subj = messages[messageCounter].getSubject();
      var subObj = subj.split('@').pop();
          subObj = subObj.split('(')[0];
      var subStr = subObj.toString();
      
      // Ignore recurring invites and invoices
      var ignore = /Weekly|Every|INVOICE/g;
      if (!subStr.match(ignore)){
      
        // Match the full date string fron invite
        var dateRegex = /(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+\d{1,2},\s\d{4}\s+(1[0-2]|0?[1-9])(:?|(am|pm))([0-5][0-9]|)(am|pm)/;
        var dayStr = subStr.match(dateRegex)[0];
        
        // Match the year from string
        var yearRegex = /\d{4}/;
        var year = dayStr.match(yearRegex)[0];
        
        // Match the month from string
        var monthDayRegex = /(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+\d{1,2}/;
        var monthDay = dayStr.match(monthDayRegex)[0];
        
        // Match the time from string
        var timeRegex = /(1[0-2]|0?[1-9])(:?|(am|pm))([0-5][0-9]|)(am|pm)/;
        var time = dayStr.match(timeRegex)[0];
        
        // convert 12hr to 24hr
            time = timeConvertor(time);
        var dateStr = year+' '+monthDay+' '+time
        
        // convert date string to date object
        var dayDate = new Date(dateStr);        

        // Compare current time to date object
        var todayDate = Date.now();

        // If past, archive message
        if (dayDate < todayDate){
          GmailApp.moveThreadToArchive(threads[threadCounter])
          console.log("Archiving: "+subj);
        } 
      }
    }
  }
  console.log('Calendar archive finished');
};

function timeConvertor(time) {
  var output;
  var PM = !time.match('am');
    time = time.split(':')
    if (time[1]) {
      if (PM) {
          var hour = 12 + parseInt(time[0],10)
          var min = time[1].replace('pm', '')
      } else {
          var hour = time[0]
          var min = time[1].replace('am', '')
      }
      output = hour + ':' + min + ':00';
    } else {
      if (PM) {
        var hour = 12+parseInt(time[0].replace('pm', ''),10)
      } else {
        var hour = time[0].replace('am', '')

      }
      output = hour + ':00:00'
    }
  return output
}