A simple script that waits for tickets to become available for the Harry Potter Studio Tour in London, and grabs them

WBTicketCheck.js

// Note that this has some limitations, such as looking specifically for adult tickets,
// looking for the given days only in the nearest month that has availability,
// and always choosing the earliest time if several are found within the desired dates.

function setAdultTickets(adultTicketsWanted) {
	const adultTicketsCount = parseInt($('.quantity-control.row > input')[0].value, 10);
	const ticketChangeIterations = Math.abs(adultTicketsWanted - adultTicketsCount);
	const ticketChangeButton = $(`.quantity-control.row > button.typcn-${adultTicketsCount < adultTicketsWanted ? 'plus' : 'minus'}`)[0];

	for (let i = 0; i < ticketChangeIterations; i++) {
		ticketChangeButton.click();
	}
}

function playSound(src) {
	return new Promise((resolve) => {
		const audio = new Audio(src);
		audio.onended = resolve;
		audio.play();
	});
}

function repeatHeyListen() {
	playSound('https://www.myinstants.com/media/sounds/hey_listen.mp3')
		.then(repeatHeyListen);
}

function waitForAvailability() {
	return new Promise((resolve) => {
		setTimeout(() => {
			const availableEls = $('.calendar>.row:not(.blankLoader) .calendar-body .day.available'), isLoading = $('.calendar-modal[data-component=eventTimeModal] .modal-content > .loading-mask.hide').length === 0;
			if (isLoading) {
				return waitForAvailability()
					.then((res) => resolve(res));
			}

			resolve(availableEls);
		}, 1000);
	});
}

function playSounds() {
	playSound('https://www.myinstants.com/media/sounds/mlg-airhorn.mp3')
		.then(() => playSound('https://www.myinstants.com/media/sounds/sound-9______.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/ps_1.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/wrong-answer-sound-effect.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/lalalalala.swf.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/tuturu_1.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/hallelujahshort.swf.mp3'))
		.then(repeatHeyListen);
}

function addTicketsToBasket(dayElement) {
	dayElement.click();

	setTimeout(() => waitForAvailability()
		.then(() => {
			$('.ui-control.button.select-time')[0].click();

			setTimeout(() => {
				$('.typcn.typcn-shopping-cart.ng-binding')[0].click();
			}, 2000);
		}), 2000);
}

function checkForTickets(datesWanted=[6, 7, 8], adultTicketsWanted=2, checkFrequency=15) {
	setAdultTickets(adultTicketsWanted);

	function check() {
		$('.shared-calendar-button').click();

		waitForAvailability()
			.then(availableEls => {
				console.log(new Date(), 'Availability loaded. Checking for relevant dates...');
				for (let i = 0; i < availableEls.length; i++) {
					const day = parseInt(availableEls[i].innerText, 10);
					console.log('Day', day, 'is available...');
					if (datesWanted.includes(day)) {
						console.log('Found tickets!!!!!');
						playSounds();
						addTicketsToBasket(availableEls[i]);
						return;
					}
				}

				console.log(`Relevant dates not yet available. Will check again in ${checkFrequency} seconds.`);
				$('#page > div:nth-child(11) > div.modal.info-modal.w-auto-c > div > div.close').click();
				setTimeout(check, checkFrequency * 1000);
		});
	};
	check();
}

Hmm, how interesting... I haven't been able to get it to happen for me, but sounds like it could be a result of the race condition mentioned here, which may become more likely once we add hour constraints.

If you could send the exact parameters you pass to checkForTicketsInMonth, maybe I'll be able to see how it happens. Or, if you could send the lines printed above the error, so I can see what was happening that led up to it, that could help as well.

Of course, if this happens randomly only every so often, and not in some deterministic fashion, one workaround would be to just automatically ignore the error and continue. I think you might be able to achieve this by turning checkForTickets into:

function checkForTickets(datesWanted=[6, 7, 8], adultTicketsWanted=2, checkFrequency=15, monthWanted, hourRange) {
	setAdultTickets(adultTicketsWanted);

	async function check() {
		try {
			if ($('.ui-control.button.extendSession').length != 0) {
				console.log('Extending session');
				$('.ui-control.button.extendSession').click();
			}
			
			$('.shared-calendar-button').click();

			await waitForAvailability(monthWanted)
				.then(async ({ availableEls, month }) => {
					console.log(new Date(), `Availability loaded${month != null ? ` for month ${month}` : ''}. Checking for relevant dates...`);

					if (monthWanted != null && month > monthWanted) {
						console.log(`Month is too late (${month}). Will check again in ${checkFrequency} seconds.`);
						setTimeout(check, checkFrequency * 1000);
						return;
					}

					for (let i = 0; i < availableEls.length; i++) {
						const day = parseInt($('.calendar>.row:not(.blankLoader) .calendar-body .day.available')[i].innerText, 10);
						console.log('Day', day, 'is available...');
						if (datesWanted.includes(day)) {
							const succeeded = await addTicketsToBasket($('.calendar>.row:not(.blankLoader) .calendar-body .day.available')[i], hourRange);
							if (succeeded) return;
						}
					}

					console.log(`Relevant dates not yet available. Will check again in ${checkFrequency} seconds.`);
					setTimeout(check, checkFrequency * 1000);
			});
		} catch (err) {
			console.error('Error checking. Just gonna keep trying.', err);
			setTimeout(check, checkFrequency * 1000);
		}
	};
	check();
}

@Rovack today i tried it again and it works perfectly 👍 i dont now why it dosn‘t the last time. Thank u very much for your support

Great! Glad to hear it @Mirtel123.
Let me know how it turns out or if you run into any further issues. :)

Hello there,

Sorry for this dumb questions but really i need to ask :/

i've modified the script in which days i want to buy. (14 - 15 may) here is the script code;

---

// Note that this has some limitations, such as looking specifically for adult tickets,
// looking for the given days only in the nearest month that has availability,
// and always choosing the earliest time if several are found within the desired dates.

function setAdultTickets(adultTicketsWanted) {
const adultTicketsCount = parseInt($('.quantity-control.row > input')[0].value, 10);
const ticketChangeIterations = Math.abs(adultTicketsWanted - adultTicketsCount);
const ticketChangeButton = $(.quantity-control.row > button.typcn-${adultTicketsCount < adultTicketsWanted ? 'plus' : 'minus'})[0];

for (let i = 0; i < ticketChangeIterations; i++) {
	ticketChangeButton.click();
}

}

function playSound(src) {
return new Promise((resolve) => {
const audio = new Audio(src);
audio.onended = resolve;
audio.play();
});
}

function repeatHeyListen() {
playSound('https://www.myinstants.com/media/sounds/hey_listen.mp3')
.then(repeatHeyListen);
}

function waitForAvailability() {
return new Promise((resolve) => {
setTimeout(() => {
const availableEls = $('.c-14-all.available')
if (availableEls.length === 0) {
return waitForAvailability()
.then((res) => resolve(res));
}

		resolve(availableEls);
	}, 1000);
});

}

function playSounds() {
playSound('https://www.myinstants.com/media/sounds/mlg-airhorn.mp3')
.then(() => playSound('https://www.myinstants.com/media/sounds/sound-9______.mp3'))
.then(() => playSound('https://www.myinstants.com/media/sounds/ps_1.mp3'))
.then(() => playSound('https://www.myinstants.com/media/sounds/wrong-answer-sound-effect.mp3'))
.then(() => playSound('https://www.myinstants.com/media/sounds/lalalalala.swf.mp3'))
.then(() => playSound('https://www.myinstants.com/media/sounds/tuturu_1.mp3'))
.then(() => playSound('https://www.myinstants.com/media/sounds/hallelujahshort.swf.mp3'))
.then(repeatHeyListen);
}

function addTicketsToBasket(dayElement) {
dayElement.click();

waitForAvailability()
	.then(() => {
		$('.ui-control.button.select-time')[0].click();

		setTimeout(() => {
			$('.typcn.typcn-shopping-cart.ng-binding')[0].click();
		}, 2000);
	});

}

function checkForTickets(datesWanted=[14, 15], adultTicketsWanted=2, checkFrequency=15) {
setAdultTickets(adultTicketsWanted);

function check() {
	$('.shared-calendar-button').click();

	waitForAvailability()
		.then(availableEls => {
			console.log(new Date(), 'Availability loaded. Checking for relevant dates...');
			for (let i = 0; i < availableEls.length; i++) {
				const day = parseInt(availableEls[i].innerText, 10);
				console.log('Day', day, 'is available...');
				if (datesWanted.includes(day)) {
					console.log('Found tickets!!!!!');
					playSounds();
					addTicketsToBasket(availableEls[i]);
					return;
				}
			}

			console.log(`Relevant dates not yet available. Will check again in ${checkFrequency} seconds.`);
			$('#page > div:nth-child(11) > div.modal.info-modal.w-auto-c > div > div.close').click();
			setTimeout(check, checkFrequency * 1000);
	});
};
check();

}

i just updated datesWanted.

here are the questions;

1. when i run script, google chrome says ''undefined'' i think this is normal but i have to be sure :)
2. after a while webpage popups an error ''SESSION WARNING
   Your session has expired.
   START OVER''

is it normal?

again sorry for disturb.
thanks for your help.

Hi @gokhanalpdogan! First of all, yes: getting "undefined" is normal. Just make sure after you run that, you also actually use checkForTickets, as described here, because until you do nothing is actually happening. That's also actually where you're supposed to specify the dates, although the way you did it should be fine too.

That same comment also mentions, near the bottom, how to deal with these expiring sessions, by linking here where there's a solution for that.

Hope this helps, but let me know if there are any further questions or complications.

Hey @Rovack I just wanted to say a big thank you for this one. Got it up and running, took about five days straight use and I was able to get four tickets for next week.

@chfrodin That's awesome, makes me really happy to hear - thanks so much for letting me know! 😄

How do you run this script to start? Not a web developer.

How do you run this script to start? Not a web developer.

I was able to get it working by using console in edge. Thanks for the code! Will update if I get some. Booking out two months, but barely missed the open window for when I'll be there.

Awesome, glad you got it running @wired14! :) Definitely let me know if you run into any problems.

Awesome, glad you got it running @wired14! :) Definitely let me know if you run into any problems.

Was finally able to get tickets today. @Rovack. I had to use the modified version. It would time out after a day or so and I would have to re-run. I was able to get tickets this morning when I logged in to refresh the script and it immediately went off. I had to run two scripts to catch days in April and May.

Additionally, there is a queue system used occasionally, but only to initially enter the site. Also, not sure how the hourRange was used, but worked as is.

Example usage:

function setAdultTickets(adultTicketsWanted) {
	const adultTicketsCount = parseInt($('.quantity-control.row > input')[0].value, 4);
	const ticketChangeIterations = Math.abs(adultTicketsWanted - adultTicketsCount);
	const ticketChangeButton = $(`.quantity-control.row > button.typcn-${adultTicketsCount < adultTicketsWanted ? 'plus' : 'minus'}`)[0];

	for (let i = 0; i < ticketChangeIterations; i++) {
		ticketChangeButton.click();
	}
}

function playSound(src) {
	return new Promise((resolve) => {
		const audio = new Audio(src);
		audio.onended = resolve;
		audio.play();
	});
}

function repeatHeyListen() {
	playSound('https://www.myinstants.com/media/sounds/hey_listen.mp3')
		.then(repeatHeyListen);
}

function waitForAvailability(monthWanted) {
	return new Promise((resolve) => {
		setTimeout(() => {
			const availableEls = $('.calendar>.row:not(.blankLoader) .calendar-body .day.available'), isLoading = $('.calendar-modal[data-component=eventTimeModal] .modal-content > .loading-mask.hide').length === 0;
			if (isLoading) {
				return waitForAvailability(monthWanted)
					.then((res) => resolve(res));
			}

			if (monthWanted == null) {
				resolve({ availableEls });
			}

			const monthValue = $('[name="ctl00$ContentPlaceHolder$SalesChannelDetailControl$EventsDateTimeSelectorModal$EventsDateTimeSelector$CalendarSelector$MonthDropDownList"]')[0].value;
			const month = parseInt(monthValue.replace(/^\D+/g, ''), 10);

			if (month < monthWanted) {
				console.log(`Month too early (${month}) - skipping to next month.`);
				$('[name="ctl00$ContentPlaceHolder$SalesChannelDetailControl$EventsDateTimeSelectorModal$EventsDateTimeSelector$CalendarSelector$NextMonthImageButton"]').click();
				return waitForAvailability(monthWanted).then(res => resolve(res));
			}

			resolve({ availableEls, month });
		}, 1000);
	});
}

function playSounds() {
	playSound('https://www.myinstants.com/media/sounds/mlg-airhorn.mp3')
		.then(() => playSound('https://www.myinstants.com/media/sounds/sound-9______.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/ps_1.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/wrong-answer-sound-effect.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/lalalalala.swf.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/tuturu_1.mp3'))
		.then(() => playSound('https://www.myinstants.com/media/sounds/hallelujahshort.swf.mp3'))
		.then(repeatHeyListen);
}

async function addTicketsToBasket(dayElement) {
	dayElement.click();

	await new Promise((resolve) => setTimeout(resolve, 2000));
	await waitForAvailability();

	const chooseTimeButton = $('.ui-control.button.select-time:not(.disabled)')[0];
	if (!chooseTimeButton) return false;

	console.log('Found tickets!!!!!');
	playSounds();

	chooseTimeButton.click();

	await new Promise((resolve) => setTimeout(resolve, 2000));

	$('.typcn.typcn-shopping-cart.ng-binding')[0].click();
	return true;
}

function checkForTickets(datesWanted=[4,5,6], adultTicketsWanted=4, checkFrequency=15, monthWanted=5, hourRange=9-8) {
	setAdultTickets(adultTicketsWanted);

	async function check() {
		try {
			if ($('.ui-control.button.extendSession').length != 0) {
				console.log('Extending session');
				$('.ui-control.button.extendSession').click();
			}
			
			$('.shared-calendar-button').click();

			await waitForAvailability(monthWanted)
				.then(async ({ availableEls, month }) => {
					console.log(new Date(), `Availability loaded${month != null ? ` for month ${month}` : ''}. Checking for relevant dates...`);

					if (monthWanted != null && month > monthWanted) {
						console.log(`Month is too late (${month}). Will check again in ${checkFrequency} seconds.`);
						setTimeout(check, checkFrequency * 1000);
						return;
					}

					for (let i = 0; i < availableEls.length; i++) {
						const day = parseInt($('.calendar>.row:not(.blankLoader) .calendar-body .day.available')[i].innerText, 10);
						console.log('Day', day, 'is available...');
						if (datesWanted.includes(day)) {
							const succeeded = await addTicketsToBasket($('.calendar>.row:not(.blankLoader) .calendar-body .day.available')[i], hourRange);
							if (succeeded) return;
						}
					}

					console.log(`Relevant dates not yet available. Will check again in ${checkFrequency} seconds.`);
					setTimeout(check, checkFrequency * 1000);
			});
		} catch (err) {
			console.error('Error checking. Just gonna keep trying.', err);
			setTimeout(check, checkFrequency * 1000);
		}
	};
	check();
}

function checkForTicketsInMonth(datesWanted, monthWanted, adultTicketsWanted, checkFrequency) {
	return checkForTickets(datesWanted, adultTicketsWanted, checkFrequency, monthWanted);
}

Any guide how can run this code to monitor the changes in ticket status and notify me?
Can I run it on phone?
Or do I need to host a webpage?

Any guide how can run this code to monitor the changes in ticket status and notify me? Can I run it on phone? Or do I need to host a webpage?

Open console on your browser that is under developer tools. Update fields in checkForTickets for dates you want. Paste code snippet in console. Then run “checkForTickets()”.

Yay, thanks for the update @wired14! Hope you have a great time. :)

And hi, @AngshumanDey.

Any guide how can run this code to monitor the changes in ticket status and notify me? Can I run it on phone? Or do I need to host a webpage?

I don't believe you can easily run it on a phone, but you don't need to host a webpage or anything either. On a computer, all you have to do is open the browser's Console, and there you can paste the code and run it.

You can see the basic instructions in the first comment here, but you might also want to scan through the comments posted since then, which may contain updates and solutions for different problems folks have run into.

@wired14 Thanks. It works now

@Rovack : The script is great. It worked for the test dates. My problem is now I have to keep my computer running until my desired dates are available. Not sure how long that is going to take sadly.

my

Great to hear. Looking at the dates that become available, a few tickets are more likely a month ahead of time, especially the couple days before. It took me 3 weeks of checking to get it. Just had to check in on the script once a day and make sure it was still running.

my

Great to hear. Looking at the dates that become available, a few tickets are more likely a month ahead of time, especially the couple days before. It took me 3 weeks of checking to get it. Just had to check in on the script once a day and make sure it was still running.

What do you mean when you say check it on the script once a day? I suppose you have a PC that is running 24x7 without going to stanby, right? I am not sure how to do that when I am at work.