Automatically Generate an E-mail in a Google Sheet based of a Date/Time in a Cell?

问题

I have this spreadsheet Example Sheet

As people sign in an automatic time stamp goes into column A, column L then calculates a date/time 12 hours in the future.

What I would like to do is have the sheet generate an automated e-mail to the address in column K at the designated time in Column L -ONLY IF- the person hasn't entered a time in the "Time Signed Out" of Column I.

Basically, people are good at signing in, but ALWAYS forget to sign out. I'm hoping to automate a reminder e-mail for them to go back in to the sheet and put a sign out time. If not they will get an e-mail reminder.

The e-mail would have a standard subject line of: "Please Remember to Sign Out" The e-mail would have a standard body of: "It appears you may not have signed out, please click this link to sign out now"

Can I use the time or minute trigger to make the script occur even when the sheet isn't open?

I'm okay at writing very A-B-C scripts, but this one is beyond me and the examples I am getting when I search don't cover this scenario.

Thanks in advance for any help.

回答1:

Yet Another Email Question

This is totally untested but written to your specification. I hope it works okay for you. You will need to run setup my trigger and the script itself to authorize it. You should also create a column that is normally empty until you send an email and then you fill it with something. Put something in the if statement like && vA[i][column number - 1] and after the sendEmail put in something like. sh.getRange(i+1,column number).setValue('Dont send again'); and then the next time you run the script it won't send emails to people who already received them.

function sendEmailToThoseWhoHaveNotSignedOut()
{
  var ss=SpreadsheetApp.getActive();
  var sh=ss.getSheetByName('Sheet1');
  var rg=sh.getDataRange();
  var vA=rg.getValues();
  var lastHeaderRow=1;
  var now=new Date();
  var rdq=MailApp.getRemainingDailyQuota();
  for(var i=lastHeaderRow;i<vA.length;i++)
  {
    if(new Date(vA[i][11]).valueOf()<now.valueOf() && !vA[i][8] && vA[i][10] && rdq>0)
    {
      MailApp.sendEmail(vA[i][10], 'Please Remember to Sign Out', 'It appears you may not have signed out, please click this link to sign out now.')
    }
  }
}

function setUpMyTrigger()
{
  if(!isTrigger('sendEmailToThoseWhoHaveNotSignedOut'))//This prevents you from setting up more than one trigger at a time for the same function.
  {
    ScriptApp.newTrigger('sendEmailToThoseWhoHaveNotSignedOut').timeBased().everyHours(1).create();
  }
}

function isTrigger(funcName)
{
  var r=false;
  if(funcName)
  {
    var allTriggers=ScriptApp.getProjectTriggers();
    var allHandlers=[];
    for(var i=0;i<allTriggers.length;i++)
    {
      allHandlers.push(allTriggers[i].getHandlerFunction());
    }
    if(allHandlers.indexOf(funcName)>-1)
    {
      r=true;
    }
  }
  return r;
}

来源：https://stackoverflow.com/questions/46085574/automatically-generate-an-e-mail-in-a-google-sheet-based-of-a-date-time-in-a-cel