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import { UnidentifiedQueueStoreEntry, QueueStoreEntry } from './QueueDb.js';
import '../_version.js';
/**
* A class to manage storing requests from a Queue in IndexedDB,
* indexed by their queue name for easier access.
*
* Most developers will not need to access this class directly;
* it is exposed for advanced use cases.
*/
export declare class QueueStore {
private readonly _queueName;
private readonly _queueDb;
/**
* Associates this instance with a Queue instance, so entries added can be
* identified by their queue name.
*
* @param {string} queueName
*/
constructor(queueName: string);
/**
* Append an entry last in the queue.
*
* @param {Object} entry
* @param {Object} entry.requestData
* @param {number} [entry.timestamp]
* @param {Object} [entry.metadata]
*/
pushEntry(entry: UnidentifiedQueueStoreEntry): Promise<void>;
/**
* Prepend an entry first in the queue.
*
* @param {Object} entry
* @param {Object} entry.requestData
* @param {number} [entry.timestamp]
* @param {Object} [entry.metadata]
*/
unshiftEntry(entry: UnidentifiedQueueStoreEntry): Promise<void>;
/**
* Removes and returns the last entry in the queue matching the `queueName`.
*
* @return {Promise<QueueStoreEntry|undefined>}
*/
popEntry(): Promise<QueueStoreEntry | undefined>;
/**
* Removes and returns the first entry in the queue matching the `queueName`.
*
* @return {Promise<QueueStoreEntry|undefined>}
*/
shiftEntry(): Promise<QueueStoreEntry | undefined>;
/**
* Returns all entries in the store matching the `queueName`.
*
* @param {Object} options See {@link workbox-background-sync.Queue~getAll}
* @return {Promise<Array<Object>>}
*/
getAll(): Promise<QueueStoreEntry[]>;
/**
* Returns the number of entries in the store matching the `queueName`.
*
* @param {Object} options See {@link workbox-background-sync.Queue~size}
* @return {Promise<number>}
*/
size(): Promise<number>;
/**
* Deletes the entry for the given ID.
*
* WARNING: this method does not ensure the deleted entry belongs to this
* queue (i.e. matches the `queueName`). But this limitation is acceptable
* as this class is not publicly exposed. An additional check would make
* this method slower than it needs to be.
*
* @param {number} id
*/
deleteEntry(id: number): Promise<void>;
/**
* Removes and returns the first or last entry in the queue (based on the
* `direction` argument) matching the `queueName`.
*
* @return {Promise<QueueStoreEntry|undefined>}
* @private
*/
_removeEntry(entry?: QueueStoreEntry): Promise<QueueStoreEntry | undefined>;
}