/**
 * @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 { SnapshotVersion } from '../core/snapshot_version';
import { DocumentKey } from './document_key';
import { ObjectValue } from './object_value';
import { FieldPath } from './path';
/**
 * Represents a document in Firestore with a key, version, data and whether the
 * data has local mutations applied to it.
 */
export interface Document {
    /** The key for this document */
    readonly key: DocumentKey;
    /**
     * The version of this document if it exists or a version at which this
     * document was guaranteed to not exist.
     */
    readonly version: SnapshotVersion;
    /** The underlying data of this document or an empty value if no data exists. */
    readonly data: ObjectValue;
    /** Returns whether local mutations were applied via the mutation queue. */
    readonly hasLocalMutations: boolean;
    /** Returns whether mutations were applied based on a write acknowledgment. */
    readonly hasCommittedMutations: boolean;
    /**
     * Whether this document had a local mutation applied that has not yet been
     * acknowledged by Watch.
     */
    readonly hasPendingWrites: boolean;
    /**
     * Returns whether this document is valid (i.e. it is an entry in the
     * RemoteDocumentCache, was created by a mutation or read from the backend).
     */
    isValidDocument(): boolean;
    /**
     * Returns whether the document exists and its data is known at the current
     * version.
     */
    isFoundDocument(): boolean;
    /**
     * Returns whether the document is known to not exist at the current version.
     */
    isNoDocument(): boolean;
    /**
     * Returns whether the document exists and its data is unknown at the current
     * version.
     */
    isUnknownDocument(): boolean;
    isEqual(other: Document | null | undefined): boolean;
    toString(): string;
}
/**
 * Represents a document in Firestore with a key, version, data and whether it
 * has local mutations applied to it.
 *
 * Documents can transition between states via `convertToFoundDocument()`,
 * `convertToNoDocument()` and `convertToUnknownDocument()`. If a document does
 * not transition to one of these states even after all mutations have been
 * applied, `isValidDocument()` returns false and the document should be removed
 * from all views.
 */
export declare class MutableDocument implements Document {
    readonly key: DocumentKey;
    private documentType;
    version: SnapshotVersion;
    data: ObjectValue;
    private documentState;
    private constructor();
    /**
     * Creates a document with no known version or data, but which can serve as
     * base document for mutations.
     */
    static newInvalidDocument(documentKey: DocumentKey): MutableDocument;
    /**
     * Creates a new document that is known to exist with the given data at the
     * given version.
     */
    static newFoundDocument(documentKey: DocumentKey, version: SnapshotVersion, value: ObjectValue): MutableDocument;
    /** Creates a new document that is known to not exist at the given version. */
    static newNoDocument(documentKey: DocumentKey, version: SnapshotVersion): MutableDocument;
    /**
     * Creates a new document that is known to exist at the given version but
     * whose data is not known (e.g. a document that was updated without a known
     * base document).
     */
    static newUnknownDocument(documentKey: DocumentKey, version: SnapshotVersion): MutableDocument;
    /**
     * Changes the document type to indicate that it exists and that its version
     * and data are known.
     */
    convertToFoundDocument(version: SnapshotVersion, value: ObjectValue): MutableDocument;
    /**
     * Changes the document type to indicate that it doesn't exist at the given
     * version.
     */
    convertToNoDocument(version: SnapshotVersion): MutableDocument;
    /**
     * Changes the document type to indicate that it exists at a given version but
     * that its data is not known (e.g. a document that was updated without a known
     * base document).
     */
    convertToUnknownDocument(version: SnapshotVersion): MutableDocument;
    setHasCommittedMutations(): MutableDocument;
    setHasLocalMutations(): MutableDocument;
    get hasLocalMutations(): boolean;
    get hasCommittedMutations(): boolean;
    get hasPendingWrites(): boolean;
    isValidDocument(): boolean;
    isFoundDocument(): boolean;
    isNoDocument(): boolean;
    isUnknownDocument(): boolean;
    isEqual(other: Document | null | undefined): boolean;
    clone(): MutableDocument;
    toString(): string;
}
/**
 * Compares the value for field `field` in the provided documents. Throws if
 * the field does not exist in both documents.
 */
export declare function compareDocumentsByField(field: FieldPath, d1: Document, d2: Document): number;
