xref: /webtrees/app/Statistics/Google/ChartChildren.php (revision 8fca99e0b8c5295ab363e2becb96e3f73b4ba786) 
1<?php
2/**
3 * webtrees: online genealogy
4 * Copyright (C) 2018 webtrees development team
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16declare(strict_types=1);
17
18namespace Fisharebest\Webtrees\Statistics\Google;
19
20use Fisharebest\Webtrees\I18N;
21use Fisharebest\Webtrees\Statistics\AbstractGoogle;
22use Fisharebest\Webtrees\Statistics\Helper\Century;
23use Fisharebest\Webtrees\Tree;
24use Illuminate\Database\Capsule\Manager as DB;
25use Illuminate\Database\Query\JoinClause;
26
27/**
28 *
29 */
30class ChartChildren extends AbstractGoogle
31{
32    /**
33     * @var Century
34     */
35    private $centuryHelper;
36
37    /**
38     * Constructor.
39     *
40     * @param Tree $tree
41     */
42    public function __construct(Tree $tree)
43    {
44        parent::__construct($tree);
45
46        $this->centuryHelper = new Century();
47    }
48
49    /**
50     * Returns the related database records.
51     *
52     * @return \stdClass[]
53     */
54    private function queryRecords(): array
55    {
56        $query = DB::table('families')
57            ->selectRaw('ROUND(AVG(f_numchil), 2) AS num')
58            ->selectRaw('ROUND((d_year - 50) / 100) AS century')
59            ->join('dates', function (JoinClause $join) {
60                $join->on('d_file', '=', 'f_file')
61                    ->on('d_gid', '=', 'f_id');
62            })
63            ->where('f_file', '=', $this->tree->id())
64            ->where('d_julianday1', '<>', 0)
65            ->where('d_fact', '=', 'MARR')
66            ->whereIn('d_type', ['@#DGREGORIAN@', '@#DJULIAN@'])
67            ->groupBy(['century'])
68            ->orderBy('century');
69
70        return $query->get()->all();
71    }
72
73    /**
74     * Creates a children per family chart.
75     *
76     * @return string
77     */
78    public function chartChildren(): string
79    {
80        $data = [
81            [
82                I18N::translate('Century'),
83                I18N::translate('Average number')
84            ]
85        ];
86
87        foreach ($this->queryRecords() as $record) {
88            $data[] = [
89                $this->centuryHelper->centuryName((int) $record->century),
90                (float) $record->num
91            ];
92        }
93
94        return view(
95            'statistics/other/charts/column',
96            [
97                'data'        => $data,
98                'colors'      => ['#84beff'],
99                'chart_title' => I18N::translate('Average number of children per family'),
100                'hAxis_title' => I18N::translate('Century'),
101                'vAxis_title' => I18N::translate('Number of children'),
102            ]
103        );
104    }
105}
106