Enable game controllers for GuraQuest.

guraquestcontroller.js

// Instructions
// 1. Go to https://www.newgrounds.com/portal/view/809045 or https://lee-pic.itch.io/guraquest.
// 2. Click "Play Game" or "Run Game".
// 3. Open your browser's console.
// 4. Change JS context from "top" to "uploads.ungrounded.net" or "index.html" (Chrome)
//                   or from "Auto" to "game_drop" (Safari).
// 5. Copy and paste the code below into the console and press Enter.

var gamepadListener;

var game = document.getElementById("canvas");

function pressKey(keyCode, value) {
	game.dispatchEvent(new KeyboardEvent(
		value > 0.1 ? "keydown" : "keyup",
		{keyCode: keyCode, which: keyCode, bubbles: true}
	));
}

function gamepadListen() {
	gamepadListener = requestAnimationFrame(gamepadListen);
	var gamepad = navigator.getGamepads()[0]; // dualshock
	if (gamepad) {
		pressKey(32, gamepad.buttons[0].value); // cross
		pressKey(88, gamepad.buttons[1].value); // circle
		// pressKey(0, gamepad.buttons[2].value); // square
		// pressKey(0, gamepad.buttons[3].value); // triangle
		// pressKey(0, gamepad.buttons[4].value); // l1
		// pressKey(0, gamepad.buttons[5].value); // r1
		// pressKey(0, gamepad.buttons[6].value); // l2
		// pressKey(0, gamepad.buttons[7].value); // r2
		// pressKey(0, gamepad.buttons[8].value); // share
		pressKey(13, gamepad.buttons[9].value); // options
		// pressKey(0, gamepad.buttons[10].value); // l3
		// pressKey(0, gamepad.buttons[11].value); // r3
		// pressKey(38, gamepad.buttons[12].value); // up
		// pressKey(40, gamepad.buttons[13].value); // down
		pressKey(37, Math.max(gamepad.buttons[14].value, -gamepad.axes[0])); // left
		pressKey(39, Math.max(gamepad.buttons[15].value, gamepad.axes[0])); // right
		// pressKey(0, gamepad.buttons[16].value); // playstation
		// pressKey(0, gamepad.buttons[17].value); // touchpad
		if (gamepad.buttons[16].value) {
			location.reload();
		}
	}
	else {
		cancelAnimationFrame(gamepadListener);
		pressKey(32, 0);
		pressKey(88, 0);
		pressKey(13, 0);
		pressKey(37, 0);
		pressKey(39, 0);
	}
}

if (navigator.getGamepads().length) {
	gamepadListen();
}

window.addEventListener("gamepadconnected", gamepadListen);