ExtendedRelationshipUtils.php

<?php

namespace Cissee\Webtrees\Module\ExtendedRelationships;

use Fisharebest\Webtrees\Date;
use Fisharebest\Webtrees\Family;
use Fisharebest\Webtrees\Individual;

class ExtendedRelationshipUtils {

    public static function getBornNoLaterThan(Individual $individual): Date {
        $date = $individual->getBirthDate();
        if ($date->isOK()) {
            return $date;
        }

        $dates = array();
        foreach ($individual->facts() as $event) {
            $date = $event->date();
            if ($date->isOK()) {
                $dates[] = $date;
            }
        }

        $minDate = null;
        foreach ($dates as $date) {
            if ($minDate === null) {
                $minDate = $date;
            } else if (Date::compare($date, $minDate) < 0) {
                $minDate = $date;
            }
        }

        if ($minDate === null) {
            return new Date('');
        }
        return $minDate;
    }

    //for proper family-related relationship names,
    //('ex-husband', 'partner's xy')
    //we strictly need up to three dates with different types here (pre-marriage, marriage, post-divorce)
    public static function getFamilyEstablishedNoLaterThan(Family $family): Date {
        $dates = array();

        $date = $family->getMarriageDate();
        if ($date->isOK()) {
            $dates[] = $date;
        }

        foreach ($family->children() as $child) {
            $date = ExtendedRelationshipUtils::getBornNoLaterThan($child);
            if ($date->isOK()) {
                $dates[] = $date;
            }
        }

        $minDate = null;
        foreach ($dates as $date) {
            if ($minDate === null) {
                $minDate = $date;
            } else if (Date::compare($date, $minDate) < 0) {
                $minDate = $date;
            }
        }

        if ($minDate === null) {
            return new Date('');
        }
        return $minDate;
    }

}