0.3.0-0-pre.5

Web/game-snake-poc/frontend/ts/assets.ts

@@ -0,0 +1,54 @@
+// file: Web/game-snake-poc/frontend/ts/assets.ts
+// version: 1
+
+export interface SnakeWebAssets {
+    engineGeneration: number;
+    game: string;
+    gameKind: string;
+}
+
+interface CommonRuntimeAsset {
+    schema: number;
+    scope: string;
+    engine_generation: number;
+}
+
+interface GameRuntimeAsset {
+    schema: number;
+    game: string;
+    kind: string;
+}
+
+async function fetchJson<T>(relativePath: string): Promise<T> {
+    const response = await fetch(new URL(relativePath, document.baseURI));
+    if (!response.ok) {
+        throw new Error(`Asset runtime indisponible (${response.status}) : ${relativePath}`);
+    }
+    return (await response.json()) as T;
+}
+
+function validateCommonRuntime(asset: CommonRuntimeAsset): void {
+    if (asset.schema !== 1 || asset.scope !== "common" || asset.engine_generation !== 1) {
+        throw new Error("Asset common://data/runtime.json invalide pour le POC Web Snake.");
+    }
+}
+
+function validateGameRuntime(asset: GameRuntimeAsset): void {
+    if (asset.schema !== 1 || asset.game !== "game-snake-poc" || asset.kind !== "snake") {
+        throw new Error("Asset game://data/game.json invalide pour le POC Web Snake.");
+    }
+}
+
+export async function loadSnakeWebAssets(): Promise<SnakeWebAssets> {
+    const [commonRuntime, gameRuntime] = await Promise.all([
+        fetchJson<CommonRuntimeAsset>("./common/data/runtime.json"),
+        fetchJson<GameRuntimeAsset>("./game/data/game.json"),
+    ]);
+    validateCommonRuntime(commonRuntime);
+    validateGameRuntime(gameRuntime);
+    return {
+        engineGeneration: commonRuntime.engine_generation,
+        game: gameRuntime.game,
+        gameKind: gameRuntime.kind,
+    };
+}