1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2021 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees\Census;
21
22use Fisharebest\Webtrees\Date;
23use Fisharebest\Webtrees\Individual;
24
25/**
26 * The number of children born alive.
27 */
28class CensusColumnChildrenBornAlive extends AbstractCensusColumn implements CensusColumnInterface
29{
30    /**
31     * Generate the likely value of this census column, based on available information.
32     *
33     * @param Individual $individual
34     * @param Individual $head
35     *
36     * @return string
37     */
38    public function generate(Individual $individual, Individual $head): string
39    {
40        $family = $this->spouseFamily($individual);
41
42        if ($family === null || $individual->sex() !== 'F') {
43            return '';
44        }
45
46        return (string) $family->children()
47            ->filter(function (Individual $child): bool {
48                return
49                    $child->getBirthDate()->isOK() &&
50                    Date::compare($child->getBirthDate(), $this->date()) < 0 &&
51                    $child->getBirthDate()->minimumJulianDay() !== $child->getDeathDate()->minimumJulianDay();
52            })
53            ->count();
54    }
55}
56