celsomarques/ionic-datepicker

import {languages, nls} from './nls';

import {Injectable} from '@angular/core';

@Injectable()
export class DateService {
    private static _local: languages = undefined;

    public get locale(): languages {
        return DateService._local || 'en-UK';
    }

    public set locale(val: languages) {
        if (!nls.checkExists(val)) {
            throw 'Locale not recognized as a valid value. Only en-US/he-IL/ru-RU/pt-BR/de avaliable';
        }
        DateService._local = val;
    }

    constructor() {
    }

    // private locale = ((<any>window).navigator['userLanguage'] || window.navigator.language).toLowerCase();

    public setCustomNls(val: { weekdays: string[], months: string[] }) {
        nls._nls.custom = val;
    }

    public getDaysOfWeek() {
        return nls.getWeekdays(this.locale);
    }

    public getMonths() {
        return nls.getMonths(this.locale);
    }

    public doesStartFromMonday(): boolean {
        return nls.getNls(this.locale).monday === true;
    }

    public getYears() {
        let years: Array<any> = [];
        for (let i = 1900; i < 2101; i++) years.push(i);
        return years;
    }

    public createDateList(currentDate: Date) {
        let firstDayOfWeek = new Date(currentDate.getFullYear(), currentDate.getMonth(), 1).getDay();
        let firstDay = new Date(currentDate.getFullYear(), currentDate.getMonth(), 1).getDate();
        let lastDay = new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 0).getDate();
        let dateList: Date[] = [];

        // Empty placeholders so dates align with weekday columns
        for (let j = 0; j < firstDayOfWeek; j++) {
            dateList.push(undefined);
        }

        // Actual dates
        for (let i = firstDay; i <= lastDay; i++) {
            dateList.push(new Date(currentDate.getFullYear(), currentDate.getMonth(), i));
        }

        return dateList;
    }
}