Gmail Delayer

//labels: change the names accordingly to your needs.
//those labels have to be in the gmail.
var l_morning = GmailApp.getUserLabelByName("Delay/Morning");
var l_midday = GmailApp.getUserLabelByName("Delay/Midday");
var l_tonight = GmailApp.getUserLabelByName("Delay/Tonight");
var l_tomorrow = GmailApp.getUserLabelByName("Delay/Tomorrow");
var l_nextweek = GmailApp.getUserLabelByName("Delay/Nextweek");
var me = "YOUR EMAIL GOES HERE";

//array of all the labels: DO IT
var labels=[l_midday,l_tonight,l_tomorrow,l_nextweek];


//archive the labeled mails and mars them as read.
function markMailAsRead(){
  //for all the labels
  for(var i=0;i<labels.length;i++){
    var l=labels[i];
    var threads = l.getThreads();
    //mark them as read and move to archive
    if (threads.length>0){
      GmailApp.markThreadsRead(threads);
      GmailApp.moveThreadsToArchive(threads);
    }
    }
}

//move emails to inbox and make them as unread.
function inbox(threads, label){
  //if there are threads
  if (threads.length>0){
    GmailApp.moveThreadsToInbox(threads);
    //for all the threads
    for(var i=0;i<threads.length;i++){
      //get all the messages
      var messages = threads[i].getMessages();
      //get the last message
      var lastM = messages[messages.length-1];
      if (lastM.getFrom().indexOf(me)>=0)
        lastM = messages[messages.length-2];
      //mark only the last as unread.
      GmailApp.markMessageUnread(lastM);
    }
    //remove the delay label from the threads.
    label.removeFromThreads(threads);
  }
}

//move the email from a label to another label
function move(label_from, label_to){
 threads = label_from.getThreads();
  //if there are threads
  if (threads.length>0){
    label_from.removeFromThreads(threads);
    label_to.addToThreads(threads);
  }
}

//at 08am:put email in inbox (from midday)
function morining(){
  label = l_morning;
  threads = label.getThreads();
  inbox(threads,label);
}

//at midday:put email in inbox (from midday)
function midday(){
 label = l_midday;
 threads = label.getThreads();
 inbox(threads,label);
}

//at 4pm: put email in inbox (from tonight)
function tonight(){
 label = l_tonight;
 threads = label.getThreads();
 inbox(threads,label);
}

//everyday (at 00) move the mail from tomorrow to morning
function tomorrow(){
 label_from = l_tomorrow;
 label_to = l_morning;
 move(label_from, label_to);
}

//on sunday at 7AM: move email from nextweek to tomorrow.
function nextweek(){
 label_from = l_nextweek;
 label_to = l_tomorrow;
 move(label_from, label_to);
}