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();
}

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.

Hi, sometimes I run into this error that stops the script. Any way to optimize it so it keeps refreshing?

Hey @huoshenw. That looks like the same issue that @athko described back in 2023, but as far as I know it hasn't recurred in nearly 2 years... And as noted there, it appears to be an error in the code of the website itself, and not the script, which makes it all the more puzzling.
I suspect the reason it's stopping the script is that it's an unhandled error, so perhaps it's interrupting any running code including ours.

If so, it's possible that pasting something like the following in the Console before the script will, while not addressing the error itself, at least allow the script to continue refreshing and trying even after it happens (though I can't say for sure as I'm unable to reproduce the problem myself):

 window.addEventListener('error', function(event) {
    console.warn('Caught error:', event.error);
    event.preventDefault();
});

window.addEventListener('unhandledrejection', function(event) {
    console.warn('Caught unhandled rejection:', event.reason);
    event.preventDefault();
});

[Edit: Strikethroughs added since this turned out not to work.]

Beyond that, I just wonder why only some people seem to be running into this issue...
I'd think it's a timing issue (a "race condition"), but that wouldn't really explain why some folks have it happen quite frequently, whereas I've never encountered it even once.
I suppose it could be specific to some browser/OS/unusual set of circumstances - any chance that if you try a different browser it stops happening?

I tried this command but still got the same error. The quickest way to reproduce it is by purchasing through this website—issues pop up way more often than with regular ticket purchases, which should make it easier for you to pinpoint the problem
thanks again!!!!!

https://www.priceless.com/entertainment/product/191976/warner-bros-studio-tour-london-the-making-of-harry-potter/0/4007/options/location/9673/contentType/1_2_4_5/

Just a quick heads-up, my screenshot isn't complete—the full version I got looks like this, with no calendar showing up

@huoshenw Tried through the Pricessless link you shared, but I still can't get it to reproduce. I set the refresh rate to 1 second hoping it'd happen quickly, but even after a few hundred refreshes, I never ran into this issue.
Could you share what parameters you're using when running this (dates, etc)? Maybe they affect this somehow.

But either way, it occurs to me that one possible explanation for why the script stops is that the loading indicator doesn't clear properly when their code crashes, which means the script keeps waiting forever for loading to finish.
We can easily solve that by capping the amount of time it waits - the only problem is that I'm not sure that even if we detect these cases and try to reopen the dialog, the site will still be functioning properly once we do. Still, worth a shot.

Probably all you'd have to do is replace the waitForAvailability function with, say:

maxAttempts = 10;
function waitForAvailability(attempt = 1) {
	if (attempt > maxAttempts) return Promise.resolve([]);

	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(attempt + 1)
					.then((res) => resolve(res));
			}

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

(If you're using the code version that allows you to select a month too it'd be slightly different; just let me know if so and I can send over a modified version of that as well.)

If this still doesn't work because the site just stops working whenever it runs into that error, then I suppose we'd have to either fix their code so it doesn't crash to begin with, figure out some way to hard-refresh the page while keeping the script running, or at least notify you loudly so you can manually refresh...
None of the options sounds that simple, so let's just hope this works, and see what we can do if not.