Function beginCacheRequests

src/Data/CacheStore.js:138–175

(keys, priority = FOREGROUND_PRIORITY, requestEpoch = cacheEpoch)

}

export function beginCacheRequests(keys, priority = FOREGROUND_PRIORITY, requestEpoch = cacheEpoch) {
    if (requestEpoch !== cacheEpoch) {
        return {
            keys: [],
            epoch: requestEpoch,
            versionFor: () => undefined,
            release() {
            },
        };
    }
    const isBackground = priority === BACKGROUND_PRIORITY;
    const requestKeys = isBackground
        ? keys.filter((key) => !foregroundRequests.has(key))
        : keys;
    const versions = new Map(requestKeys.map((key) => [key, nextRequestVersion(key)]));
    if (!isBackground) {
        requestKeys.forEach((key) => foregroundRequests.set(key, (foregroundRequests.get(key) ?? 0) + 1));
    }

    return {
        keys: requestKeys,
        epoch: requestEpoch,
        versionFor: (key) => versions.get(key),
        release() {
            if (isBackground) {
                return;
            }
            requestKeys.forEach((key) => {
                const remaining = (foregroundRequests.get(key) ?? 1) - 1;
                if (remaining > 0) {
                    foregroundRequests.set(key, remaining);
                } else {
                    foregroundRequests.delete(key);
                }
            });
        },
    };
}

export async function loadCachedValue({
                                          forceRefresh = false,