Question

我有一个名为alertnotice(to, message, body)的函数，它将在用户onClick()事件上执行。该函数将执行sendEmail(to, message, body)以根据计算的触发器发送电子邮件，如变量triggerDay，如下所示：

function alertnotice(to, subject, body, dueDate, notifyBeforeDay) {//start of this class

  function sendEmail(to, subject, body){
    try {
      MailApp.sendEmail({
        to: to,
        subject: subject,
        htmlBody: body
      });
    } catch(e) {
      console.error(JSON.stringify(e));
    }
  }

  //check if there is an existing trigger for this process
  var existingTrigger = PropertiesService.getScriptProperties().getProperty("sendEmailTrigger");

  //set the renewal notice day
  var triggerDay = (dueDate - notifyBeforeDay) / (1000*60*60*24);

  //if the trigger already exists, inform user about it
  if(existingTrigger) {

    return "Alert notice had been sent"; 

  } else { // if the trigger does not exists, continue to set the trigger to send alert notice

    //runs the script every day at 1am on the time zone specified
    var newTrigger = ScriptApp.newTrigger('sendEmail')
    .timeBased()
    .atTime(triggerDay)
    .create();

    var triggerId = newTrigger.getUniqueId(); 

    if(triggerId) {
      PropertiesService.getScriptProperties().setProperty("autoExportTrigger", triggerId);
      return "Alert notice send successfully!";
    } else {
      return "Failed to send alert notice. Try again please"; 
    }
 }

}//end of this class

例如，如果dueDate为 30/07/2018 和notifyBeforeDay = 30，则该函数应在截止日期前30天发送电子邮件。我试图实现这一目标，但不确定我的算法是否有效。任何人都可以就此提出建议吗？

Answer 1

这个实现对我来说很脆弱。我宁愿单手触发以避免任何可能的重复电子邮件并确保至少一个。像这样的Smth：

// I am server script, trigger me on schedule (for instance nightly)
function sendAlerts() {
  var query = app.models.Customers.newQuery();

  // query only for non-notified customers with upcoming due date
  query.filters.NorificationAttempts._lessThan = ATTEMPTS_THRESHOLD;
  query.filters.Notified._equals = false;
  query.filters.DueDate._lessThan = <dueDate>;

  var customers = query.run();

  customers.forEach(function(customer) {
    var success = sendNotification(customer);

    if (success) {
      customer.Notified = true;
    } else {
      customer.NorificationAttempts++;
    }

    // performance trade off in favor of consistency
    app.saveRecords([customer]);
  });
}

此类脚本的触发器可以由应用管理员安装，您可以在People Skills模板中找到类似的实现。

在Google AppMaker上触发计算日期

1 个答案: