/**
 * @license
 * Copyright 2017 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { Query } from '../core/query';
import { SnapshotVersion } from '../core/snapshot_version';
import { DocumentKeySet, MutableDocumentMap } from '../model/collections';
import { MutableDocument } from '../model/document';
import { DocumentKey } from '../model/document_key';
import { PersistencePromise } from './persistence_promise';
import { PersistenceTransaction } from './persistence_transaction';
import { RemoteDocumentChangeBuffer } from './remote_document_change_buffer';
/**
 * Represents cached documents received from the remote backend.
 *
 * The cache is keyed by DocumentKey and entries in the cache are
 * MutableDocuments, meaning we can cache both actual documents as well as
 * documents that are known to not exist.
 */
export interface RemoteDocumentCache {
    /**
     * Looks up an entry in the cache.
     *
     * @param documentKey - The key of the entry to look up.*
     * @returns The cached document entry. Returns an invalid document if the
     * document is not cached.
     */
    getEntry(transaction: PersistenceTransaction, documentKey: DocumentKey): PersistencePromise<MutableDocument>;
    /**
     * Looks up a set of entries in the cache.
     *
     * @param documentKeys - The keys of the entries to look up.
     * @returns The cached document entries indexed by key. If an entry is not
     * cached, the corresponding key will be mapped to an invalid document.
     */
    getEntries(transaction: PersistenceTransaction, documentKeys: DocumentKeySet): PersistencePromise<MutableDocumentMap>;
    /**
     * Executes a query against the cached Document entries.
     *
     * Implementations may return extra documents if convenient. The results
     * should be re-filtered by the consumer before presenting them to the user.
     *
     * Cached NoDocument entries have no bearing on query results.
     *
     * @param query - The query to match documents against.
     * @param sinceReadTime - If not set to SnapshotVersion.min(), return only
     *     documents that have been read since this snapshot version (exclusive).
     * @returns The set of matching documents.
     */
    getDocumentsMatchingQuery(transaction: PersistenceTransaction, query: Query, sinceReadTime: SnapshotVersion): PersistencePromise<MutableDocumentMap>;
    /**
     * Provides access to add or update the contents of the cache. The buffer
     * handles proper size accounting for the change.
     *
     * Multi-Tab Note: This should only be called by the primary client.
     *
     * @param options - Specify `trackRemovals` to create sentinel entries for
     * removed documents, which allows removals to be tracked by
     * `getNewDocumentChanges()`.
     */
    newChangeBuffer(options?: {
        trackRemovals: boolean;
    }): RemoteDocumentChangeBuffer;
    /**
     * Get an estimate of the size of the document cache. Note that for eager
     * garbage collection, we don't track sizes so this will return 0.
     */
    getSize(transaction: PersistenceTransaction): PersistencePromise<number>;
}