Seconds-to-Duration Template Tag ported to JavaScript

secstodur.js

/**
 * Seconds-to-Duration Template Tag ported to JavaScript
 * @author Dan Ward 2009 (http://d-w.me)
 * @author Nicolás Santisteban (https://ibk.rocks)
 **/

function secstodur(value, long=false) {
	// Place seconds in to integer
	var secs = parseInt(value);

	// If seconds are greater than 0
	if (secs > 0) {
		// Place durations of given units in to variables
		var daySecs = 86400;
		var hourSecs = 3600;
		var minSecs = 60;

		// If short string is enabled
		if (!long) {
			// Set short names
			var dayUnitName = ' day';
			var hourUnitName = ' hr';
			var minUnitName = ' min';
			var secUnitName = ' sec';

			// Set short duration unit splitters
			var lastDurSplitter = ' ';
			var nextDurSplitter = lastDurSplitter;

		// If short string is not provided or any other value
		} else {
			// Set long names
			var dayUnitName = ' day';
			var hourUnitName = ' hour';
			var minUnitName = ' minute';
			var secUnitName = ' second';

			// Set long duration unit splitters
			var lastDurSplitter = ' and ';
			var nextDurSplitter = ', ';
		}

		// Create string to hold outout
		var durationString = '';

		// Calculate number of days from seconds
		var days = parseInt(Math.floor(secs / parseInt(daySecs)));

		// Subtract days from seconds
		var secs = secs - (days * parseInt(daySecs));

		// Calculate number of hours from seconds (minus number of days)
		var hours = parseInt(Math.floor(secs / parseInt(hourSecs)));

		// Subtract hours from seconds
		var secs = secs - (hours * parseInt(hourSecs));

		// Calculate number of minutes from seconds (minus number of days and hours)
		var minutes = parseInt(Math.floor(secs / parseInt(minSecs)));

		// Subtract days from seconds
		var secs = secs - (minutes * parseInt(minSecs));

		// Calculate number of seconds (minus days, hours and minutes)
		var seconds = secs;

		// If number of days is greater than 0
		if (days > 0) {
			// Add multiple days to duration string
			var durationString = durationString + ' ' + String(days) + dayUnitName + (days > 1 && 's' || '');
		}

		// Determine if next string is to be shown
		if (hours > 0) {
			// If there are no more units after this
			if (minutes <= 0 && seconds <= 0) {
				// Set hour splitter to last
				var hourSplitter = lastDurSplitter;
			// If there are unit after this
			} else {
				// Set hour splitter to next
				var hourSplitter = (durationString.length > 0 && nextDurSplitter || '');
			}
		}

		// If number of hours is greater than 0
		if (hours > 0) {
			// Add multiple days to duration string
			var durationString = durationString + hourSplitter + ' ' + String(hours) + hourUnitName + (hours > 1 && 's' || '');
		}

		// Determine if next string is to be shown
		if (minutes > 0) {
			// If there are no more units after this
			if (seconds <= 0) {
				/// Set minute splitter to last
				var minSplitter = lastDurSplitter;
			// If there are unit after this
			} else {
				// Set minute splitter to next
				var minSplitter = (durationString.length > 0 && nextDurSplitter || '');
			}
		}

		// If number of minutes is greater than 0
		if (minutes > 0) {
			// Add multiple days to duration string
			var durationString = durationString + minSplitter + ' ' + String(minutes) + minUnitName + (minutes > 1 && 's' || '');
		}

		// Determine if next string is last
		if (seconds > 0) {
			// Set second splitter
			var secSplitter = (durationString.length > 0 && lastDurSplitter || '');
		}

		// If number of seconds is greater than 0
		if (seconds > 0) {
			// Add multiple days to duration string
			var durationString = durationString + secSplitter + ' ' + String(seconds) + secUnitName + (seconds > 1 && 's' || '');
		}

		// Return duration string
		return durationString.trim()
	// If seconds are not greater than 0
	} else {
		// Provide 'No duration' message
		return null;
	}
}