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/** * MIT License * Copyright (c) 2020 Burhanuddin Ahmed */

import { timezone as List } from "./api.ts";import { privateReturn } from "./type.ts";
const MINUTES_TO_MILISECOND = 60000;
export class Time {    public now: string;    public utc:string;    private time:string | undefined;
    constructor (time?: string) {        this.time = time;        this.now = this.timezone();        this.utc = new Date().toISOString();    }
    public timezone (timezone:string | null = null): string {        let getDifferenceToUtcInMilisec = new Date().getTimezoneOffset() * MINUTES_TO_MILISECOND;        let getUTCMilisecond = new Date().getTime();        if (this.time) {            getUTCMilisecond = new Date(this.time).getTime();        }
        if (!timezone) {            // return current system datetime            return new Date(getUTCMilisecond - getDifferenceToUtcInMilisec).toISOString();        }
        if (timezone == 'UTC') {            return this.utc;        }
        let addedtime = this.parseText(timezone);        if (!addedtime.status) {            throw addedtime.text;        }                // return manipulated timezone based on calculation additional / differentiation time        return new Date(getUTCMilisecond + Number(addedtime.text)).toISOString();    }
    private parseText (textTimezone: string): privateReturn {        let obj = List.find(el => el.id.toLowerCase() == textTimezone.toLocaleLowerCase());        if (!obj) {            return {                status: false,                text: 'timezone you entered is not compatible'            };        }        let splittedObject = obj.text.split(' ');        let removeText = splittedObject[0]                        .replace('(', '')                        .replace(')', '')                        .replace('GMT', '');        let getTimezoneHours = removeText.split(':');        let getMinutes = ((Number(getTimezoneHours[0]) * 60) + Number(getTimezoneHours[1])) * MINUTES_TO_MILISECOND;        return {            status: true,            text: `${getMinutes}`        }    }    }