Paychex TimeandLabor Clockout Calculator

paychex_bookmarklet.js

javascript:
TIME_REGEX = /^(\d+):(\d+) (\w+)/;

function show (targetHours) {
	var clockoutMatch = /(\d{2}):(\d{2}):(\d{2}){0,1}/.exec(getClockoutTime(targetHours).toString());
	var outputHours = parseInt(clockoutMatch[1]);
	var outputMeridian = (outputHours >= 12) ? 'pm' : 'am';
	if (outputHours > 12) outputHours = outputHours % 12;
	var clockoutString = "Clock out: "+outputHours+':'+clockoutMatch[2]+' '+outputMeridian;
	if (clockoutMatch[3]) clockoutString += ' & '+clockoutMatch[3]+' sec';
	var nextTry = prompt(clockoutString+"\n\nTarget number of hours (float):");
	if (nextTry && nextTry.trim().length) {
		var nextTargetHours = parseFloat(nextTry.trim());
		show(nextTargetHours);
	}
}

/* Return float for hours */
function getLastPunch () {
	var rows = jQuery('table#Table1 tr');
	var lastPunchRow = -1;
	for (var i = rows.length-1; i >= 0 ; i--) {
		var cell = rows[i].children[6];
		if (cell && TIME_REGEX.test(cell.textContent))
			break;
	}
	var lastPunchMatch = TIME_REGEX.exec(cell.textContent);
	var hours = parseInt(lastPunchMatch[1]);
	var minutes = parseInt(lastPunchMatch[2]);
	var meridian = lastPunchMatch[3];
	if (meridian == 'pm' && hours != 12)
		hours += 12;
	var lastPunch = new Date;
	lastPunch.setHours(hours);
	lastPunch.setMinutes(minutes);
	lastPunch.setSeconds(0);
	console.log('lastPunch: '+lastPunch.getTime());
	console.log("lastPunch: "+lastPunch);
	return lastPunch;
}

/* Return Date for clockout */
function getClockoutTime (targetHours) {
	var delta;
	var hoursSoFar = parseFloat(jQuery('table#Table1 tr:last-child td:nth-child(4)').text());
	console.log("hoursSoFar "+hoursSoFar);
	if (!targetHours) {
		delta = 8 - (hoursSoFar % 8);
	} else {
		delta = targetHours - hoursSoFar;
	}
	console.log("delta to target "+delta);
	var clockoutTime = getLastPunch().getTime() + 1000*60*60*delta;
	console.log("clockout: "+clockoutTime);
	var nextPunch = new Date(clockoutTime);
	console.log("clockout: "+nextPunch);
	return nextPunch;
}

show();