@xfanta/mars-time/dist/darianCalendar.js

Mars time conversion library (MSD, MTC, Darian Calendar)

import { utcToMarsSolDate, marsSolDateToUTC } from "./marsSolDate";
const DARIAN_MONTHS = [
    "Sagittarius", "Dhanus", "Capricornus", "Makara",
    "Aquarius", "Kumbha", "Pisces", "Mina",
    "Aries", "Mesha", "Taurus", "Vrishabha",
    "Gemini", "Mithuna", "Cancer", "Karka",
    "Leo", "Simha", "Virgo", "Kanya",
    "Libra", "Tula", "Scorpius", "Vrishika"
];
/**
 * Converts a UTC date to Darian calendar date.
 * @param date UTC date
 * @returns Darian date object
 */
export function getDarianDate(date) {
    const msd = utcToMarsSolDate(date);
    return msdToDarianDate(msd);
}
/**
 * Converts Mars Sol Date (MSD) to Darian calendar date.
 * @param msd Mars Sol Date
 * @returns Darian date object
 */
export function msdToDarianDate(msd) {
    const sols = Math.floor(msd);
    const year = Math.floor(sols / 668.6);
    const solOfYear = sols % 669;
    const monthIndex = Math.floor(solOfYear / 28) % 24;
    const sol = (solOfYear % 28) + 1;
    return {
        year: year + 1,
        month: DARIAN_MONTHS[monthIndex],
        monthIndex,
        sol
    };
}
/**
 * Converts a Darian calendar date to Mars Sol Date (MSD).
 * @param darian Darian date object
 * @returns Mars Sol Date
 */
export function darianDateToMSD(darian) {
    const yearOffset = (darian.year - 1) * 668.6;
    const solOffset = darian.monthIndex * 28 + (darian.sol - 1);
    return yearOffset + solOffset;
}
/**
 * Converts a Darian calendar date to UTC date.
 * @param darian Darian date object
 * @returns UTC date
 */
export function darianDateToUTC(darian) {
    const msd = darianDateToMSD(darian);
    return marsSolDateToUTC(msd);
}
/**
 * Formats a Darian date object into a readable string.
 * @param darian Darian date object
 * @returns Formatted string e.g. "3 Vrishika, Year 35"
 */
export function formatDarianDate(darian) {
    return `${darian.sol} ${darian.month}, Year ${darian.year}`;
}