Refactor DIY 3 code

[LunarTides]

Hearthstone.js/cards/Examples/DIY/3.ts

Lines 99 to 157 in 75b8f82

	// Testing your solution.
	// TODO: All this code is bad. Please fix it.
	let target = self;
	let correctParameters = false;
	let potentiallyCancelled = false;
	// Make sure the parameters are correct
	game.functions.event.addListener("TargetSelectionStarts", (_unknownVal) => {
	const val = _unknownVal as EventValue<"TargetSelectionStarts">;
	// Don't check for `prompt` since there is no correct prompt
	const [prompt, card, forceSide, forceClass, flags] = val;
	correctParameters = (
	card == self &&
	forceSide == "any" &&
	forceClass == "minion" &&
	flags.length == 0
	);
	// The `TargetSelectionStarts` event fired. This means that the card has a chance of being cancelled.
	potentiallyCancelled = true;
	return "destroy";
	}, 1);
	// Find the target
	game.functions.event.addListener("TargetSelected", (_unknownVal) => {
	const val = _unknownVal as EventValue<"TargetSelected">;
	if (!(val[0] === self)) return false;
	// At this point we know that the card wasn't cancelled, since the `TargetSelected` event doesn't fire if the card is cancelled
	target = val[1] as Card;
	potentiallyCancelled = false;
	return "destroy";
	}, 1);
	solution();
	// This only happens if the `TargetSelectionStarts` event fired, but not `TargetSelected`.
	// That only happens if the card was cancelled after the `TargetSelectionStarts` event fired
	if (potentiallyCancelled) {
	game.pause("You cancelled the card. The verification process depends on a minion actually being killed. Try again.\n");
	return game.constants.REFUND;
	}
	const solved = (
	target !== self &&
	target.getHealth() <= 0 &&
	correctParameters &&
	game.graveyard.some(p => p.includes(target))
	);
	game.interact.verifyDIYSolution(solved, "3.ts");
	if (!solved) return game.constants.REFUND;
	return true;