a bit of refactoring; importing engine into bun for server

1 files changed, 40 insertions, 0 deletions

diff --git a/engine/config/assets.ts b/engine/config/assets.ts
new file mode 100644
index 0000000..51a5303
--- /dev/null
+++ b/engine/config/assets.ts
@@ -0,0 +1,40 @@
+import type { SpriteSpec } from "./sprites";
+import { SPRITE_SPECS } from "./sprites";
+
+export const IMAGES = new Map<string, HTMLImageElement>();
+
+export const loadSpritesIntoImageElements = (
+  spriteSpecs: Partial<SpriteSpec>[]
+): Promise<void>[] => {
+  const spritePromises: Promise<void>[] = [];
+
+  for (const spriteSpec of spriteSpecs) {
+    if (spriteSpec.sheet) {
+      const img = new Image();
+      img.src = spriteSpec.sheet;
+      IMAGES.set(spriteSpec.sheet, img);
+
+      spritePromises.push(
+        new Promise((resolve) => {
+          img.onload = () => resolve();
+        })
+      );
+    }
+
+    if (spriteSpec.states) {
+      spritePromises.push(
+        ...loadSpritesIntoImageElements(Object.values(spriteSpec.states))
+      );
+    }
+  }
+
+  return spritePromises;
+};
+
+export const loadAssets = () =>
+  Promise.all([
+    ...loadSpritesIntoImageElements(
+      Array.from(SPRITE_SPECS.keys()).map((key) => SPRITE_SPECS.get(key))
+    ),
+    // TODO: Sound
+  ]);