witchday/utils.js

const utils = {
	withGrid(n) {
		return n * 16;
	},
	asGridCoord(x, y) {
		return `${x*16},${y*16}`
	},
	nextPosition(initialX, initialY, direction) {
		let x = initialX;
		let y = initialY;
		const size = 16;

		if (direction === "left") {
			x -= size;
		} else if (direction === "right") {
			x += size;
		} else if (direction === "up") {
			y -= size;
		} else if (direction === "down") {
			y += size;
		}

		return {x, y};
	},
	oppositeDirection(direction) {
		if (direction === "left") { return "right" }
		if (direction === "right") { return "left" }
		if (direction === "up") { return "down" }
		return "up";
	},

	emitEvent(name, detail) {
		const event = new CustomEvent(name, {
			detail
		});
		document.dispatchEvent(event);

	}
}