@tanstack/router-core/dist/esm/lru-cache.js

Modern and scalable routing for React applications

//#region src/lru-cache.ts
function createLRUCache(max) {
	const cache = /* @__PURE__ */ new Map();
	let oldest;
	let newest;
	const touch = (entry) => {
		if (!entry.next) return;
		if (!entry.prev) {
			entry.next.prev = void 0;
			oldest = entry.next;
			entry.next = void 0;
			if (newest) {
				entry.prev = newest;
				newest.next = entry;
			}
		} else {
			entry.prev.next = entry.next;
			entry.next.prev = entry.prev;
			entry.next = void 0;
			if (newest) {
				newest.next = entry;
				entry.prev = newest;
			}
		}
		newest = entry;
	};
	return {
		get(key) {
			const entry = cache.get(key);
			if (!entry) return void 0;
			touch(entry);
			return entry.value;
		},
		set(key, value) {
			if (cache.size >= max && oldest) {
				const toDelete = oldest;
				cache.delete(toDelete.key);
				if (toDelete.next) {
					oldest = toDelete.next;
					toDelete.next.prev = void 0;
				}
				if (toDelete === newest) newest = void 0;
			}
			const existing = cache.get(key);
			if (existing) {
				existing.value = value;
				touch(existing);
			} else {
				const entry = {
					key,
					value,
					prev: newest
				};
				if (newest) newest.next = entry;
				newest = entry;
				if (!oldest) oldest = entry;
				cache.set(key, entry);
			}
		},
		clear() {
			cache.clear();
			oldest = void 0;
			newest = void 0;
		}
	};
}
//#endregion
export { createLRUCache };

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