main.gs

const GOOGLE_DRIVE_FOLDER_ID = '';
const GOOGLE_DOC_TEMPLATE_ID = '';
const SLACK_WEBHOOK_URL = '';

function isMonday (d) {
  return d.getDay() === 1
}

function nextMonday() {
  
  var d = new Date();
  
  if (isMonday(d)) {
    return d;
  }
  
  d.setDate(d.getDate() + (1 + 7 - d.getDay()) % 7);
  return d;
}

function slack(message) {
  var url = SLACK_WEBHOOK_URL;
  
  var payload = {
     "channel" : "#tlg-private",
     "username" : "tlg-report-bot",
     "text" : message
  }

  var options =  {
    "method" : "post",
    "contentType" : "application/json",
    "payload" : JSON.stringify(payload)
  };
  
  return UrlFetchApp.fetch(url, options)
}

// runs every Monday morning
function nagAgenda() {
  slack('Remember to check the agenda for this week\'s <https://docs.google.com/document/d/yes/edit%7CTLG meeting>');
}

// runs every Friday AM
function nagReport() {
  slack("It's Friday! Contributions to the <https://drive.google.com/drive/folders/lol%7CTLG Report> & <https://docs.google.com/document/d/yes/edit%7CWeekly Briefing> please.");
}

function main() {
  
  // Generate a timestamp
  var timestamp = Utilities.formatDate(nextMonday(), "GMT", "dd/MM/yyyy");
  var iso8061 = Utilities.formatDate(nextMonday(), "GMT", "yyyy-MM-dd");
  
  // Copy the TLG Report template
  var docid = DriveApp.getFileById(GOOGLE_DOC_TEMPLATE_ID).makeCopy().getId();
  var doc = DocumentApp.openById(docid);
  doc.setName('TLG Report + Meeting - ' + iso8061);

  // Replace the date
  var body = doc.getActiveSection();
  body.replaceText("XDATEX", timestamp);
  doc.saveAndClose();
  
  // Add the file to the TLG folder
  var file = DriveApp.getFileById(docid);
  var folder = DriveApp.getFolderById(DRIVE_FOLDER_ID);
  folder.addFile(file);
    
  // Slack
  slack("✨ Hi, here's a fresh <" + doc.getUrl() + "|TLG Report>. ✨");

}