gmailAutoarchive.js

// Original author fwed (contact@fwed.fr)
// Modified from
// https://gist.github.com/0x4a/e410aa72fca06fcfafce9f00ff47d82c
// https://gist.github.com/anonymous/2cca33d376f7f924fdaa67891ad098cc
// https://medium.com/@fw3d/auto-archive-emails-in-gmail-after-2-days-1ebf0e076b1c

var OP_ARCHIVE = 1;
var OP_READ    = 2;
var OP_DELETE  = 4;

var ONE_MONTH = "1m";
var THREE_MONTHS = "3m";

function gmailAutocleanup() {
  gmailBatchArchive("label:foo", ONE_MONTH, THREE_MONTHS);
  gmailBatchArchive("label:bar", "3d", THREE_MONTHS);
  gmailBatchOp("from:spammy", "3d", null, OP_READ | OP_ARCHIVE);
}

/**
 * Archive threads
 */
function gmailBatchArchive(search, older_than, newer_than) {
  gmailBatchOp(search, older_than, newer_than, OP_ARCHIVE);
}

/**
 * Batch process gmail threads with one or more operations given by op
 *
 * @param search Search string to filter messages (e.g., by label or from)
 * @param older_than Filter messages older than this timeframe (e.g., 2d [days], 1m [month])
 * @param newer_than Optionally filter messages newer than this timeframe
 * @param op Bitmask flag of operations to perform (OP_ARCHIVE, OP_READ, OP_DELETE)
 */
function gmailBatchOp(search, older_than, newer_than, op) {
  var string = search + " in:inbox -in:starred older_than:" + older_than;
  if (newer_than) {
    string += " newer_than:" + newer_than;
  }
  var ops = "";
  if (op & OP_ARCHIVE) ops += "archive";
  if (op & OP_READ) ops += "; mark_read";
  if (op & OP_DELETE) ops += "; delete";
  Logger.log("running gmail batch ops: " + ops);
  Logger.log("search string: " + string);


  var threads = GmailApp.search(string, 0, 500);
  var num = threads.length;
  Logger.log("found: " + num + " threads older than " + older_than);
  if (num === 0) {
    return;
  }
  
  var batch_size = 100;
  while (threads.length) {
    var this_batch_size = Math.min(threads.length, batch_size);
    var this_batch = threads.splice(0, this_batch_size);

    if (op & OP_ARCHIVE) {
      GmailApp.moveThreadsToArchive(this_batch);
    }
    if (op & OP_READ) {
      GmailApp.markThreadsRead(this_batch);
    }
    if (op & OP_DELETE) {
      GmailApp.moveThreadsToTrash(this_batch);
    }
  }

  Logger.log("finished processing " + num + " threads\n");
}