/*!
 * Copyright 2018 Google Inc. All Rights Reserved.
 *
 * 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 { google } from '../protos/firestore_v1_proto_api';
import api = google.firestore.v1;
/**
 * A Timestamp represents a point in time independent of any time zone or
 * calendar, represented as seconds and fractions of seconds at nanosecond
 * resolution in UTC Epoch time. It is encoded using the Proleptic Gregorian
 * Calendar which extends the Gregorian calendar backwards to year one. It is
 * encoded assuming all minutes are 60 seconds long, i.e. leap seconds are
 * "smeared" so that no leap second table is needed for interpretation. Range is
 * from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z.
 *
 * @see https://github.com/google/protobuf/blob/master/src/google/protobuf/timestamp.proto
 */
export declare class Timestamp {
    private readonly _seconds;
    private readonly _nanoseconds;
    /**
     * Creates a new timestamp with the current date, with millisecond precision.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.set({ updateTime:Firestore.Timestamp.now() });
     *
     * @return {Timestamp} A new `Timestamp` representing the current date.
     */
    static now(): Timestamp;
    /**
     * Creates a new timestamp from the given date.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * let date = Date.parse('01 Jan 2000 00:00:00 GMT');
     * documentRef.set({ startTime:Firestore.Timestamp.fromDate(date) });
     *
     * @param {Date} date The date to initialize the `Timestamp` from.
     * @return {Timestamp} A new `Timestamp` representing the same point in time
     * as the given date.
     */
    static fromDate(date: Date): Timestamp;
    /**
     * Creates a new timestamp from the given number of milliseconds.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.set({ startTime:Firestore.Timestamp.fromMillis(42) });
     *
     * @param {number} milliseconds Number of milliseconds since Unix epoch
     * 1970-01-01T00:00:00Z.
     * @return {Timestamp}  A new `Timestamp` representing the same point in time
     * as the given number of milliseconds.
     */
    static fromMillis(milliseconds: number): Timestamp;
    /**
     * Generates a `Timestamp` object from a Timestamp proto.
     *
     * @private
     * @param {Object} timestamp The `Timestamp` Protobuf object.
     */
    static fromProto(timestamp: google.protobuf.ITimestamp): Timestamp;
    /**
     * Creates a new timestamp.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.set({ startTime:new Firestore.Timestamp(42, 0) });
     *
     * @param {number} seconds The number of seconds of UTC time since Unix epoch
     * 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
     * 9999-12-31T23:59:59Z inclusive.
     * @param {number} nanoseconds The non-negative fractions of a second at
     * nanosecond resolution. Negative second values with fractions must still
     * have non-negative nanoseconds values that count forward in time. Must be
     * from 0 to 999,999,999 inclusive.
     */
    constructor(seconds: number, nanoseconds: number);
    /**
     * The number of seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.get().then(snap => {
     *   let updated = snap.updateTime;
     *   console.log(`Updated at ${updated.seconds}s ${updated.nanoseconds}ns`);
     * });
     *
     * @type {number}
     */
    readonly seconds: number;
    /**
     * The non-negative fractions of a second at nanosecond resolution.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.get().then(snap => {
     *   let updated = snap.updateTime;
     *   console.log(`Updated at ${updated.seconds}s ${updated.nanoseconds}ns`);
     * });
     *
     * @type {number}
     */
    readonly nanoseconds: number;
    /**
     * Returns a new `Date` corresponding to this timestamp. This may lose
     * precision.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.get().then(snap => {
     *   console.log(`Document updated at: ${snap.updateTime.toDate()}`);
     * });
     *
     * @return {Date} JavaScript `Date` object representing the same point in time
     * as this `Timestamp`, with millisecond precision.
     */
    toDate(): Date;
    /**
     * Returns the number of milliseconds since Unix epoch 1970-01-01T00:00:00Z.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.get().then(snap => {
     *   let startTime = snap.get('startTime');
     *   let endTime = snap.get('endTime');
     *   console.log(`Duration: ${endTime - startTime}`);
     * });
     *
     * @return {number} The point in time corresponding to this timestamp,
     * represented as the number of milliseconds since Unix epoch
     * 1970-01-01T00:00:00Z.
     */
    toMillis(): number;
    /**
     * Returns 'true' if this `Timestamp` is equal to the provided one.
     *
     * @example
     * let documentRef = firestore.doc('col/doc');
     *
     * documentRef.get().then(snap => {
     *   if (snap.createTime.isEqual(snap.updateTime)) {
     *     console.log('Document is in its initial state.');
     *   }
     * });
     *
     * @param {any} other The `Timestamp` to compare against.
     * @return {boolean} 'true' if this `Timestamp` is equal to the provided one.
     */
    isEqual(other: Timestamp): boolean;
    /**
     * Generates the Protobuf `Timestamp` object for this timestamp.
     *
     * @private
     * @returns {Object} The `Timestamp` Protobuf object.
     */
    toProto(): api.IValue;
}