Refactor codebase

src/engine/world/world-logic.ts

@@ -0,0 +1,29 @@
+import type { World, EntityId } from "../../core/types";
+
+export function inBounds(w: World, x: number, y: number): boolean {
+  return x >= 0 && y >= 0 && x < w.width && y < w.height;
+}
+
+export function idx(w: World, x: number, y: number): number {
+  return y * w.width + x;
+}
+
+export function isWall(w: World, x: number, y: number): boolean {
+  return w.tiles[idx(w, x, y)] === 1;
+}
+
+export function isBlocked(w: World, x: number, y: number): boolean {
+  if (!inBounds(w, x, y)) return true;
+  if (isWall(w, x, y)) return true;
+
+  for (const a of w.actors.values()) {
+    if (a.pos.x === x && a.pos.y === y) return true;
+  }
+  return false;
+}
+
+export function isPlayerOnExit(w: World, playerId: EntityId): boolean {
+  const p = w.actors.get(playerId);
+  if (!p) return false;
+  return p.pos.x === w.exit.x && p.pos.y === w.exit.y;
+}