Autoarchive Gmail script for Google Scripts

gmailAutoarchive.js

function gmailAutoarchive() {
  let labelRules = {
    "Autoarchive": [
      { "days": 60, "actions": ["archive", "markread"] }
    ],
    "Autodelete": [
      { "days": 60, "actions": ["delete"] }
    ],
    "Label 1": [
      { "days": 30, "actions": ["archive", "markread"] }
    ],
    "Label 2": [
      { "days": 90, "actions": ["archive", "markread"] }
    ],
    "Label 3": [
      { "days": 60, "actions": ["archive", "markread"] }
    ],
    "Label 4": [
      { "days": 14, "actions": ["archive", "markread"] },
      { "days": 30, "actions": ["delete"] }
    ],
    "Label 5": [
      { "days": 14, "actions": ["archive", "markread"] }
    ]
  };

  Object.keys(labelRules).forEach((label) => {
    console.log("Processing Label: " + label);
    let labelObj = GmailApp.getUserLabelByName(label);
    
    // Skip over label if it's not found...
    if (labelObj == null) {
      console.log("Label " + label + " does not exist, moving on...");
      return;
    }

    let threads = labelObj.getThreads(0, 400);
    let rules = labelRules[label];

    // Counters
    let processed = 0;
    let archived = 0;
    let markedread = 0;
    let deleted = 0;

    rules.forEach((actionSet) => {
      let maxDate = new Date();
      maxDate.setDate(maxDate.getDate() - actionSet.days); // What was the date at that time?

      // Process threads if they're older than the limit we set, and don't have starred messages.
      threads.forEach((thread) => {
        if (thread.getLastMessageDate() < maxDate && !thread.hasStarredMessages()
        ) {
          if (actionSet.actions.indexOf("archive") != -1 && thread.isInInbox()) {
            console.log("Archiving: " + thread.getFirstMessageSubject() + " [" + thread.getLastMessageDate().toDateString() + "]");
            thread.moveToArchive();
            archived++;
          }

          if (actionSet.actions.indexOf("markread") != -1 && thread.isUnread()) {
            console.log("Marking Read: " + thread.getFirstMessageSubject() + " [" + thread.getLastMessageDate().toDateString() + "]");
            thread.markRead();
            markedread++;
          }

          if (actionSet.actions.indexOf("delete") != -1 && !thread.isInTrash()) {
            console.log("Deleting: " + thread.getFirstMessageSubject() + " [" + thread.getLastMessageDate().toDateString() + "]");
            thread.moveToTrash();
            deleted++;
          }
          processed++;
        }
      });
    });
    console.log(processed + " threads processed for label " + label + ". [" + archived + " archived, " + markedread + " marked read, " + deleted + " deleted]");
  });
}