Andegna\Holiday\Easter

Complexity

Total Complexity

2

Size/Duplication

Total Lines	46
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

100%

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	get()	0	23	1

<?php

namespace Andegna\Holiday;

use Andegna\Converter\FromJdnConverter;
use Andegna\DateTimeFactory;
use DateTimeZone;

/**
 * Ethiopian Easter.
 */
class Easter
{
    /** @var DateTimeZone */
    private $dateTimeZone;

    /**
     * Easter constructor.
     *
     * @param DateTimeZone $dateTimeZone
     */
    public function __construct(DateTimeZone $dateTimeZone = null)
    {
        $this->dateTimeZone = $dateTimeZone;
    }

    /**
     * Get the easter date of a given Ethiopian year.
     *
     * @param $year int Ethiopian year
     *
     * @return \Andegna\DateTime
     */
    public function get(int $year)
    {
        // convert the Ethiopian year to a Julian year
        // ሚያዝያ 1 is just a random day after the Gregorian new year
        $julian_year = (int) DateTimeFactory::of($year, 8, 1)
            ->toGregorian()->format('Y');

        // get the number of days from vernal equinox to the Easter in the given Julian year
        $days_after = easter_days($julian_year, CAL_EASTER_ALWAYS_JULIAN);

        // get the JDN of vernal equinox (March 21) in the given Julian year
        $jdn = juliantojd(3, 21, $julian_year);

        // add the number of days to Easter
        $jdn += $days_after;

        // create a Ethiopian Date to JDN converter
        $con = new FromJdnConverter($jdn);

        // create an Ethiopian date from the converter
        return DateTimeFactory::of($con->getYear(), $con->getMonth(), $con->getDay(),
            0, 0, 0, $this->dateTimeZone);
    }
}