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import { useEffect, useRef, useState } from "react";
export default function useTimeout(callback: () => void, delay: number) {
const timeoutRef = useRef<number | null>(null);
const savedCallback = useRef(callback);
useEffect(() => {
savedCallback.current = callback;
}, [callback]);
useEffect(() => {
const tick = () => savedCallback.current();
if (typeof delay === "number") {
timeoutRef.current = setTimeout(tick, delay);
return () => {
if (timeoutRef.current) clearTimeout(timeoutRef.current);
};
}
}, [delay]);
return timeoutRef;
}
export function usePersistentState<T>(key: string, initial: T) {
const [value, setValue] = useState<T>(() => {
if (typeof window === "undefined") return initial;
try {
const raw = window.localStorage.getItem(key);
if (!raw) return initial;
return JSON.parse(raw) as T;
} catch {
return initial;
}
});
useEffect(() => {
try {
window.localStorage.setItem(key, JSON.stringify(value));
} catch {
// ignore quota errors in dev, etc.
}
}, [key, value]);
return [value, setValue] as const;
}
// wsCache.js
// const CACHE_KEY = "ws_dev_cache";
// export const getCachedData = (key: string) => {
// if (typeof window === "undefined") return null;
// const cached = localStorage.getItem(CACHE_KEY + key);
// if (!cached) return null;
// const { data, timestamp } = JSON.parse(cached);
// if (Date.now() - timestamp > 30 * 60 * 1000) {
// localStorage.removeItem(CACHE_KEY);
// return null;
// }
// return data;
// };
// export const setCachedData = (key: string, data: any) => {
// if (typeof window === "undefined") return;
// localStorage.setItem(
// CACHE_KEY + key,
// JSON.stringify({
// data,
// timestamp: Date.now(),
// }),
// );
// };
// // Add this to your component for easy clearing
// export const clearWebSocketCache = () => {
// localStorage.removeItem(CACHE_KEY);
// window.location.reload();
// };
// wsCache.js
interface CacheEntry<T> {
data: T;
timestamp: number;
}
const DB_NAME = "WebSocketCacheDB";
const STORE_NAME = "cache";
const DB_VERSION = 1;
const CACHE_DURATION = 30 * 60 * 1000; // 30 minutes
const openDB = (): Promise<IDBDatabase> => {
return new Promise((resolve, reject) => {
const request: IDBOpenDBRequest = indexedDB.open(DB_NAME, DB_VERSION);
request.onerror = () => reject(request.error);
request.onsuccess = () => resolve(request.result);
request.onupgradeneeded = (event: IDBVersionChangeEvent) => {
const db = (event.target as IDBOpenDBRequest).result;
if (!db.objectStoreNames.contains(STORE_NAME)) {
db.createObjectStore(STORE_NAME);
}
};
});
};
export const getCachedData = async <T = unknown,>(
key: string = "default",
): Promise<T | null> => {
try {
const db = await openDB();
return new Promise((resolve, reject) => {
const transaction = db.transaction(STORE_NAME, "readonly");
const store = transaction.objectStore(STORE_NAME);
const request: IDBRequest<CacheEntry<T>> = store.get(key);
request.onsuccess = () => {
const result = request.result;
if (result && Date.now() - result.timestamp < CACHE_DURATION) {
resolve(result.data);
} else {
resolve(null);
}
};
request.onerror = () => reject(request.error);
});
} catch (error) {
console.warn("[Cache] IndexedDB read failed:", error);
return null;
}
};
export const setCachedData = async <T,>(
data: T,
key: string = "default",
): Promise<void> => {
try {
const db = await openDB();
return new Promise((resolve, reject) => {
const transaction = db.transaction(STORE_NAME, "readwrite");
const store = transaction.objectStore(STORE_NAME);
const entry: CacheEntry<T> = {
data,
timestamp: Date.now(),
};
const request = store.put(entry, key);
request.onsuccess = () => resolve();
request.onerror = () => reject(request.error);
});
} catch (error) {
console.warn("[Cache] IndexedDB write failed:", error);
if (error instanceof DOMException && error.name === "QuotaExceededError") {
await clearCache();
}
}
};
export const clearCache = async (key?: string): Promise<void> => {
try {
const db = await openDB();
const transaction = db.transaction(STORE_NAME, "readwrite");
const store = transaction.objectStore(STORE_NAME);
if (key) {
await store.delete(key);
} else {
await store.clear();
}
} catch (error) {
console.warn("[Cache] Clear failed:", error);
}
};
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