block object

cache.js

@@ -0,0 +1,31 @@
+export class Cache {
+    constructor(root) {
+        this.root = root;
+        this.handlers = new Map();
+        this.promises = new Map();
+    }
+
+    register(kind, handler) {
+        this.handlers.set(kind, handler);
+    }
+
+    get(id, kind) {
+        const [namespace, resource] = id.includes(':') ? id.split(':', 2) : ["minecraft", id];
+        id = `${namespace}:${resource}`;
+        const url = `${this.root}/${namespace}/${kind}/${resource}`;
+
+        const key = `${kind}:${namespace}:${resource}`;
+        if (this.promises.has(key)) return this.promises.get(key);
+
+        const handler = this.handlers.get(kind);
+        if (!handler) throw new Error(`No handler registered for resource kind: ${kind}`);
+
+        if (handler.prepare) {
+            handler.prepare(this, id, url);
+        }
+
+        const promise = handler.process(this, id, url);
+        this.promises.set(key, promise);
+        return promise;
+    }
+}