feat: add caching

package.json

@@ -58,6 +58,7 @@
 		"isomorphic-unfetch": "^4.0.2",
 		"make-error": "^1.3.6",
 		"query-string": "^9.0.0",
+		"quick-lru": "^7.0.0",
 		"tiny-lru": "^11.2.5",
 		"url-join": "^5.0.0",
 		"validate-npm-package-name": "^5.0.0",

src/fetch-data.ts

@@ -1,11 +1,26 @@
+import QuickLRU from "quick-lru";
 import { z } from "zod";
 
+const cache = new QuickLRU({
+	// 100 items.
+	maxSize: 100,
+
+	// 5 minutes.
+	maxAge: 5 * 60 * 1000,
+});
+
 export const fetchData = async <T extends z.ZodTypeAny>(
 	schema: T,
 	url: string,
 	headers?: Record<string, string>,
 ): Promise<z.TypeOf<T>> => {
+	const cacheKey = JSON.stringify({ url, headers });
+	const cachedJson = cache.get(cacheKey);
+	if (cachedJson) {
+		return schema.parse(cachedJson) as z.infer<T>;
+	}
 	const response = await fetch(url, { headers });
-	const json = await response.json();
+	const json = (await response.json()) as unknown;
+	cache.set(cacheKey, json);
 	return schema.parse(json) as z.infer<T>;
 };