/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import * as tslib_1 from "tslib";
import { NgbDate } from './ngb-date';
import { Injectable } from '@angular/core';
import { isInteger } from '../util/util';
import * as i0 from "@angular/core";
/**
 * @param {?} jsDate
 * @return {?}
 */
export function fromJSDate(jsDate) {
    return new NgbDate(jsDate.getFullYear(), jsDate.getMonth() + 1, jsDate.getDate());
}
/**
 * @param {?} date
 * @return {?}
 */
export function toJSDate(date) {
    /** @type {?} */
    var jsDate = new Date(date.year, date.month - 1, date.day, 12);
    // this is done avoid 30 -> 1930 conversion
    if (!isNaN(jsDate.getTime())) {
        jsDate.setFullYear(date.year);
    }
    return jsDate;
}
/**
 * @return {?}
 */
export function NGB_DATEPICKER_CALENDAR_FACTORY() {
    return new NgbCalendarGregorian();
}
/**
 * A service that represents the calendar used by the datepicker.
 *
 * The default implementation uses the Gregorian calendar. You can inject it in your own
 * implementations if necessary to simplify `NgbDate` calculations.
 * @abstract
 */
var NgbCalendar = /** @class */ (function () {
    function NgbCalendar() {
    }
    NgbCalendar.decorators = [
        { type: Injectable, args: [{ providedIn: 'root', useFactory: NGB_DATEPICKER_CALENDAR_FACTORY },] }
    ];
    /** @nocollapse */ NgbCalendar.ngInjectableDef = i0.ɵɵdefineInjectable({ factory: NGB_DATEPICKER_CALENDAR_FACTORY, token: NgbCalendar, providedIn: "root" });
    return NgbCalendar;
}());
export { NgbCalendar };
if (false) {
    /**
     * Returns the number of days per week.
     * @abstract
     * @return {?}
     */
    NgbCalendar.prototype.getDaysPerWeek = function () { };
    /**
     * Returns an array of months per year.
     *
     * With default calendar we use ISO 8601 and return [1, 2, ..., 12];
     * @abstract
     * @param {?=} year
     * @return {?}
     */
    NgbCalendar.prototype.getMonths = function (year) { };
    /**
     * Returns the number of weeks per month.
     * @abstract
     * @return {?}
     */
    NgbCalendar.prototype.getWeeksPerMonth = function () { };
    /**
     * Returns the weekday number for a given day.
     *
     * With the default calendar we use ISO 8601: 'weekday' is 1=Mon ... 7=Sun
     * @abstract
     * @param {?} date
     * @return {?}
     */
    NgbCalendar.prototype.getWeekday = function (date) { };
    /**
     * Adds a number of years, months or days to a given date.
     *
     * * `period` can be `y`, `m` or `d` and defaults to day.
     * * `number` defaults to 1.
     *
     * Always returns a new date.
     * @abstract
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    NgbCalendar.prototype.getNext = function (date, period, number) { };
    /**
     * Subtracts a number of years, months or days from a given date.
     *
     * * `period` can be `y`, `m` or `d` and defaults to day.
     * * `number` defaults to 1.
     *
     * Always returns a new date.
     * @abstract
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    NgbCalendar.prototype.getPrev = function (date, period, number) { };
    /**
     * Returns the week number for a given week.
     * @abstract
     * @param {?} week
     * @param {?} firstDayOfWeek
     * @return {?}
     */
    NgbCalendar.prototype.getWeekNumber = function (week, firstDayOfWeek) { };
    /**
     * Returns the today's date.
     * @abstract
     * @return {?}
     */
    NgbCalendar.prototype.getToday = function () { };
    /**
     * Checks if a date is valid in the current calendar.
     * @abstract
     * @param {?} date
     * @return {?}
     */
    NgbCalendar.prototype.isValid = function (date) { };
}
var NgbCalendarGregorian = /** @class */ (function (_super) {
    tslib_1.__extends(NgbCalendarGregorian, _super);
    function NgbCalendarGregorian() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    /**
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getDaysPerWeek = /**
     * @return {?}
     */
    function () { return 7; };
    /**
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getMonths = /**
     * @return {?}
     */
    function () { return [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]; };
    /**
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getWeeksPerMonth = /**
     * @return {?}
     */
    function () { return 6; };
    /**
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getNext = /**
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    function (date, period, number) {
        if (period === void 0) { period = 'd'; }
        if (number === void 0) { number = 1; }
        /** @type {?} */
        var jsDate = toJSDate(date);
        /** @type {?} */
        var checkMonth = true;
        /** @type {?} */
        var expectedMonth = jsDate.getMonth();
        switch (period) {
            case 'y':
                jsDate.setFullYear(jsDate.getFullYear() + number);
                break;
            case 'm':
                expectedMonth += number;
                jsDate.setMonth(expectedMonth);
                expectedMonth = expectedMonth % 12;
                if (expectedMonth < 0) {
                    expectedMonth = expectedMonth + 12;
                }
                break;
            case 'd':
                jsDate.setDate(jsDate.getDate() + number);
                checkMonth = false;
                break;
            default:
                return date;
        }
        if (checkMonth && jsDate.getMonth() !== expectedMonth) {
            // this means the destination month has less days than the initial month
            // let's go back to the end of the previous month:
            jsDate.setDate(0);
        }
        return fromJSDate(jsDate);
    };
    /**
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getPrev = /**
     * @param {?} date
     * @param {?=} period
     * @param {?=} number
     * @return {?}
     */
    function (date, period, number) {
        if (period === void 0) { period = 'd'; }
        if (number === void 0) { number = 1; }
        return this.getNext(date, period, -number);
    };
    /**
     * @param {?} date
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getWeekday = /**
     * @param {?} date
     * @return {?}
     */
    function (date) {
        /** @type {?} */
        var jsDate = toJSDate(date);
        /** @type {?} */
        var day = jsDate.getDay();
        // in JS Date Sun=0, in ISO 8601 Sun=7
        return day === 0 ? 7 : day;
    };
    /**
     * @param {?} week
     * @param {?} firstDayOfWeek
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getWeekNumber = /**
     * @param {?} week
     * @param {?} firstDayOfWeek
     * @return {?}
     */
    function (week, firstDayOfWeek) {
        // in JS Date Sun=0, in ISO 8601 Sun=7
        if (firstDayOfWeek === 7) {
            firstDayOfWeek = 0;
        }
        /** @type {?} */
        var thursdayIndex = (4 + 7 - firstDayOfWeek) % 7;
        /** @type {?} */
        var date = week[thursdayIndex];
        /** @type {?} */
        var jsDate = toJSDate(date);
        jsDate.setDate(jsDate.getDate() + 4 - (jsDate.getDay() || 7)); // Thursday
        // Thursday
        /** @type {?} */
        var time = jsDate.getTime();
        jsDate.setMonth(0); // Compare with Jan 1
        jsDate.setDate(1);
        return Math.floor(Math.round((time - jsDate.getTime()) / 86400000) / 7) + 1;
    };
    /**
     * @return {?}
     */
    NgbCalendarGregorian.prototype.getToday = /**
     * @return {?}
     */
    function () { return fromJSDate(new Date()); };
    /**
     * @param {?} date
     * @return {?}
     */
    NgbCalendarGregorian.prototype.isValid = /**
     * @param {?} date
     * @return {?}
     */
    function (date) {
        if (!date || !isInteger(date.year) || !isInteger(date.month) || !isInteger(date.day)) {
            return false;
        }
        // year 0 doesn't exist in Gregorian calendar
        if (date.year === 0) {
            return false;
        }
        /** @type {?} */
        var jsDate = toJSDate(date);
        return !isNaN(jsDate.getTime()) && jsDate.getFullYear() === date.year && jsDate.getMonth() + 1 === date.month &&
            jsDate.getDate() === date.day;
    };
    NgbCalendarGregorian.decorators = [
        { type: Injectable }
    ];
    return NgbCalendarGregorian;
}(NgbCalendar));
export { NgbCalendarGregorian };
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You can inject it in your own\n * implementations if necessary to simplify `NgbDate` calculations.\n */\n@Injectable({providedIn: 'root', useFactory: NGB_DATEPICKER_CALENDAR_FACTORY})\nexport abstract class NgbCalendar {\n  /**\n   * Returns the number of days per week.\n   */\n  abstract getDaysPerWeek(): number;\n\n  /**\n   * Returns an array of months per year.\n   *\n   * With default calendar we use ISO 8601 and return [1, 2, ..., 12];\n   */\n  abstract getMonths(year?: number): number[];\n\n  /**\n   * Returns the number of weeks per month.\n   */\n  abstract getWeeksPerMonth(): number;\n\n  /**\n   * Returns the weekday number for a given day.\n   *\n   * With the default calendar we use ISO 8601: 'weekday' is 1=Mon ... 7=Sun\n   */\n  abstract getWeekday(date: NgbDate): number;\n\n  /**\n   * Adds a number of years, months or days to a given date.\n   *\n   * * `period` can be `y`, `m` or `d` and defaults to day.\n   * * `number` defaults to 1.\n   *\n   * Always returns a new date.\n   */\n  abstract getNext(date: NgbDate, period?: NgbPeriod, number?: number): NgbDate;\n\n  /**\n   * Subtracts a number of years, months or days from a given date.\n   *\n   * * `period` can be `y`, `m` or `d` and defaults to day.\n   * * `number` defaults to 1.\n   *\n   * Always returns a new date.\n   */\n  abstract getPrev(date: NgbDate, period?: NgbPeriod, number?: number): NgbDate;\n\n  /**\n   * Returns the week number for a given week.\n   */\n  abstract getWeekNumber(week: readonly NgbDate[], firstDayOfWeek: number): number;\n\n  /**\n   * Returns the today's date.\n   */\n  abstract getToday(): NgbDate;\n\n  /**\n   * Checks if a date is valid in the current calendar.\n   */\n  abstract isValid(date: NgbDate): boolean;\n}\n\n@Injectable()\nexport class NgbCalendarGregorian extends NgbCalendar {\n  getDaysPerWeek() { return 7; }\n\n  getMonths() { return [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]; }\n\n  getWeeksPerMonth() { return 6; }\n\n  getNext(date: NgbDate, period: NgbPeriod = 'd', number = 1) {\n    let jsDate = toJSDate(date);\n    let checkMonth = true;\n    let expectedMonth = jsDate.getMonth();\n\n    switch (period) {\n      case 'y':\n        jsDate.setFullYear(jsDate.getFullYear() + number);\n        break;\n      case 'm':\n        expectedMonth += number;\n        jsDate.setMonth(expectedMonth);\n        expectedMonth = expectedMonth % 12;\n        if (expectedMonth < 0) {\n          expectedMonth = expectedMonth + 12;\n        }\n        break;\n      case 'd':\n        jsDate.setDate(jsDate.getDate() + number);\n        checkMonth = false;\n        break;\n      default:\n        return date;\n    }\n\n    if (checkMonth && jsDate.getMonth() !== expectedMonth) {\n      // this means the destination month has less days than the initial month\n      // let's go back to the end of the previous month:\n      jsDate.setDate(0);\n    }\n\n    return fromJSDate(jsDate);\n  }\n\n  getPrev(date: NgbDate, period: NgbPeriod = 'd', number = 1) { return this.getNext(date, period, -number); }\n\n  getWeekday(date: NgbDate) {\n    let jsDate = toJSDate(date);\n    let day = jsDate.getDay();\n    // in JS Date Sun=0, in ISO 8601 Sun=7\n    return day === 0 ? 7 : day;\n  }\n\n  getWeekNumber(week: readonly NgbDate[], firstDayOfWeek: number) {\n    // in JS Date Sun=0, in ISO 8601 Sun=7\n    if (firstDayOfWeek === 7) {\n      firstDayOfWeek = 0;\n    }\n\n    const thursdayIndex = (4 + 7 - firstDayOfWeek) % 7;\n    let date = week[thursdayIndex];\n\n    const jsDate = toJSDate(date);\n    jsDate.setDate(jsDate.getDate() + 4 - (jsDate.getDay() || 7));  // Thursday\n    const time = jsDate.getTime();\n    jsDate.setMonth(0);  // Compare with Jan 1\n    jsDate.setDate(1);\n    return Math.floor(Math.round((time - jsDate.getTime()) / 86400000) / 7) + 1;\n  }\n\n  getToday(): NgbDate { return fromJSDate(new Date()); }\n\n  isValid(date: NgbDate): boolean {\n    if (!date || !isInteger(date.year) || !isInteger(date.month) || !isInteger(date.day)) {\n      return false;\n    }\n\n    // year 0 doesn't exist in Gregorian calendar\n    if (date.year === 0) {\n      return false;\n    }\n\n    const jsDate = toJSDate(date);\n\n    return !isNaN(jsDate.getTime()) && jsDate.getFullYear() === date.year && jsDate.getMonth() + 1 === date.month &&\n        jsDate.getDate() === date.day;\n  }\n}\n"]}