Limit command execution

Command execution time limit

Context: The player won the lottery/a reward. The winner is not online.

The reward command is

/give %player% minecraft:cookie 5

You delay the command until the player joins the next time

/cu execute whenOnline %player% *give %player% minecraft:cookie 5

This works fine. But you want to make the player only get their reward if they join in the next 3 days. So you use the /cu execute before ... command:

/cu execute before <timestamp> *cu execute whenOnline %player% *give %player% minecraft:cookie 5

But where do we get the <timestamp> from? We can use a JavaScript Placeholder. Here is an example for our use-case:

config/placeholderapi/javascript/timestamp.js

function isEmpty(string) {
  return (!string || 0 === string.length());
}

function toNumberOrZero(string) {
  return isEmpty(string) ? 0 : parseInt(string);
}

with(new JavaImporter(java.lang, java.time, java.time.temporal, java.util, java.util.regex, java.text)) {
  var duration = args[0];
  var now = Instant.now();

  var durationRegex = Pattern.compile("(?:(\\d+)d)?(?:(\\d+)h)?(?:(\\d+)m)?(?:(\\d+)s)?(?:(\\d+)ms)?");

  var matcher = durationRegex.matcher(duration);

  if (!matcher.find()) {
    throw new IllegalArgumentException("'" + duration + "' isn't a valid duration! Use something like '3d2h12m30s800ms'")
  }

  var days = toNumberOrZero(matcher.group(1));
  var hours = toNumberOrZero(matcher.group(2));
  var minutes = toNumberOrZero(matcher.group(3));
  var seconds = toNumberOrZero(matcher.group(4));
  var milliseconds = toNumberOrZero(matcher.group(5));

  var time = now
    .plus(days, ChronoUnit.DAYS)
    .plus(hours, ChronoUnit.HOURS)
    .plus(minutes, ChronoUnit.MINUTES)
    .plus(seconds, ChronoUnit.SECONDS)
    .plus(milliseconds, ChronoUnit.MILLIS);

  var format = new SimpleDateFormat("HH:mm:ss.SSS-dd.MM.yyyy");
  out = format.format(java.util.Date.from(time));
}

So now the placeholder %javascript_timestamp% takes duration argument and returns a <timestamp> which can be used in the after and before commands.

This is our final command:

/cu execute before %javascript_timestamp_3d% *cu execute whenOnline %player% *give %player% minecraft:cookie 5