// Convert each line of the textarea to a unique input element, so they're all passed with separate GET parameters
function updateForm() {
	// Delete old input elements in case the page hasn't been reloaded since last call
	for (const oldInput of document.querySelectorAll('input[type="hidden"]')) {
		oldInput.remove();
	}

	form = document.getElementById("install-form");
	instances = document.getElementById("instance-input").value.split("\n");

	for (const instance of instances) {
		// skip empty lines
		if (!instance.trim()) {
			continue;
		}

		let input = document.createElement("input");
		input.type = "hidden";
		input.name = "instances[]";
		input.value = instance;
		form.appendChild(input);
	}
}

document.addEventListener("DOMContentLoaded", function() {
	document.getElementById("install-button").addEventListener("click", updateForm);
});