HTML 5.1 Duration string / dateTime to minutes

durationToMinutes.js

export default function durationToMinutes (durationString) {
  return durationString
      .match(/\d+\w/g)
      .map(u => ([parseInt(u.match(/\d+/g), 10), u.split(/\d+/g)[1]]))
      .map(a => {
        switch (a[1]) {
        case 'D': return a[0] * 1440;
        case 'H': return a[0] * 60;
        case 'M': return a[0];
        case 'S': return a[0] / 60;
        }
      })
      .reduce((a, b) => (a + b));
}

durationToMinutes.md

https://www.w3.org/TR/html51/infrastructure.html#durations https://developer.mozilla.org/en-US/docs/Web/API/HTMLTimeElement/dateTime

Stumbling upon a "duration string" and trying to convert it might be tricky. I myself did not find anything in the APIs to convert this into a more managable format. A friend wanted to read out minutes from it, so I made this simple script witch converts a "duration string" as per the HTML 5.1 spec into minutes.

Example duration string: P12DT7H12M13S

durationToMinutes.php

<?php

function durationToMinutes ($durationString) {
	preg_match_all("/\d+\w/", $durationString, $matches);

	$minutes = 0;

	foreach ($matches[0] as &$part) {
		$units = preg_split("/\d+/", $part);
		$nums = preg_split("/\D+/", $part);

		$num = intval($nums[0]);
		$unit = $units[1];

		switch ($unit) {
		case "D": $minutes += ($num * 1440); break;
		case "H": $minutes += ($num * 60); break;
		case "M": $minutes += $num; break;
		case "S": $minutes += ($num / 60); break;
		default: break;
		}
	}

	return $minutes;
}

?>

Awesome my friend