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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | 1x 31x 28x 31x 31x 31x 31x 31x 28x 12x 12x 14x 2x 25x | /**
* Internal Store Manager for cookie synchronization.
* This module manages listeners for same-document synchronization across
* components using the same cookie key.
*
* Unlike `localStorage`, cookies have no native `storage` event, so there is no
* way to observe cross-tab writes without polling. This store therefore keeps
* every `useCookie(key)` instance **within the same document** in sync: when one
* instance writes or removes a cookie it notifies the others. Cross-tab
* synchronization is intentionally not attempted (see the README).
*
* @internal This module is not exported publicly
*/
/** Map of key -> Set of listener callbacks */
const listeners = new Map<string, Set<() => void>>();
/**
* Subscribe a listener to changes for a specific key
* @param key - The cookie key to subscribe to
* @param listener - Callback to invoke when the key's value changes
* @returns Unsubscribe function
*/
export function subscribe(key: string, listener: () => void): () => void {
if (!listeners.has(key)) {
listeners.set(key, new Set());
}
const keyListeners = listeners.get(key)!;
keyListeners.add(listener);
return () => {
keyListeners.delete(listener);
// Cleanup: remove the key entry if no more listeners
if (keyListeners.size === 0) {
listeners.delete(key);
}
};
}
/**
* Notify all listeners subscribed to a specific key.
* This is called when setValue or removeValue is invoked to synchronize all
* components using the same key in the same document.
*
* @param key - The cookie key that was updated
*/
export function notifyListeners(key: string): void {
const keyListeners = listeners.get(key);
Eif (keyListeners) {
keyListeners.forEach((listener) => listener());
}
}
/**
* Get the count of listeners for a key (for testing purposes)
* @internal
*/
export function getListenerCount(key: string): number {
return listeners.get(key)?.size ?? 0;
}
/**
* Clear all listeners (for testing purposes)
* @internal
*/
export function clearAllListeners(): void {
listeners.clear();
}
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