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