<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OCP\Files\Cache;

/**
 * Low level access to the file cache.
 *
 * This is intended for use cases where data from the filecache needs to be loaded, but the full filesystem apis are
 * insufficient or too inefficient for the use-case.
 *
 * @since 29.0.0
 */
interface IFileAccess {
	/**
	 * Get a filecache data by file id from a specific storage.
	 *
	 * This is preferred over `getByFileId` when the storage id is known as it
	 * can be more efficient in some setups.
	 *
	 * @param int $fileId
	 * @param int $storageId
	 * @return ICacheEntry|null
	 *
	 * @since 29.0.0
	 */
	public function getByFileIdInStorage(int $fileId, int $storageId): ?ICacheEntry;

	/**
	 * Get a filecache data by path and storage id.
	 *
	 * @param string $path
	 * @param int $storageId
	 * @return ICacheEntry|null
	 *
	 * @since 29.0.0
	 */
	public function getByPathInStorage(string $path, int $storageId): ?ICacheEntry;

	/**
	 * Get a filecache data by file id.
	 *
	 * If the storage id is known then `getByFileIdInStorage` is preferred as it can be more efficient in some setups.
	 *
	 * @param int $fileId
	 * @return ICacheEntry|null
	 *
	 * @since 29.0.0
	 */
	public function getByFileId(int $fileId): ?ICacheEntry;

	/**
	 * Get filecache data by file ids.
	 *
	 * If the storage id is known then `getByFileIdsInStorage` is preferred as it can be more efficient in some setups.
	 *
	 * @param int[] $fileIds
	 * @return array<int, ICacheEntry>
	 *
	 * @since 29.0.0
	 */
	public function getByFileIds(array $fileIds): array;

	/**
	 * Get filecache data by file ids from a specific storage.
	 *
	 * This is prefered over `getByFileIds` when the storage id is known as it
	 * can be more efficient in some setups.
	 *
	 * @param int[] $fileIds
	 * @param int $storageId
	 * @return array<int, ICacheEntry>
	 *
	 * @since 29.0.0
	 */
	public function getByFileIdsInStorage(array $fileIds, int $storageId): array;
}