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import { useEffect, useRef } from 'react';
import { useSession } from 'next-auth/react';
import { useDispatch } from 'react-redux';
import { clientLogger } from '@/lib/logging/clientLogger';
import {
initializeAnonymousCart,
setCartLoaded,
setIsAnonymous,
fetchCart,
clearCart } from '@/redux/features/cartSlice';
import { getCartCookie } from '@/lib/cart';
import { AppDispatch } from '@/redux/store';
/**
* CartInitializer
*
* Initializes the cart on app load by:
* - Loading anonymous cart from cookie if user is not authenticated
* - Loading user cart from database if user is authenticated
* - Reloads cart when authentication status changes
*/
export function CartInitializer() {
const dispatch = useDispatch<AppDispatch>();
const { status } = useSession();
const previousStatus = useRef<string | null>(null);
const isInitializing = useRef(false);
useEffect(() => {
// Wait for session to be determined
if (status === 'loading') return;
// Prevent duplicate initializations during the same status
if (isInitializing.current) return;
// Only run when status changes or on first load
if (previousStatus.current === status) return;
const wasAuthenticated = previousStatus.current === 'authenticated';
isInitializing.current = true;
previousStatus.current = status;
if (status === 'unauthenticated') {
// User is not logged in (either initial load or just logged out)
// If user just logged out, clear the Redux cart state first
// This prevents stale user cart data from persisting
if (wasAuthenticated) {
clientLogger.info('User logged out, clearing cart state');
dispatch(clearCart());
}
// Load cart from cookie
const anonymousCart = getCartCookie();
if (anonymousCart && anonymousCart.length > 0) {
clientLogger.info('Initializing anonymous cart from cookie', { itemCount: anonymousCart.length });
dispatch(initializeAnonymousCart(anonymousCart));
} else {
// No cart in cookie - just mark as loaded with empty cart
dispatch(setIsAnonymous(true));
dispatch(setCartLoaded(true));
}
isInitializing.current = false;
} else if (status === 'authenticated') {
// User is authenticated - fetch cart from database
// Clear any stale cart data first before fetching fresh data
clientLogger.info('User authenticated, fetching cart from database');
dispatch(clearCart());
dispatch(setIsAnonymous(false));
void dispatch(fetchCart())
.catch((err) => {
clientLogger.error('CartInitializer fetchCart error', err instanceof Error ? err : new Error(String(err)));
})
.finally(() => {
dispatch(setCartLoaded(true));
isInitializing.current = false;
});
}
}, [status, dispatch]);
// This component doesn't render anything
return null;
}
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