xref: /webtrees/app/Statistics/Google/ChartChildren.php (revision 8d897fd11a9a8845d8456cb9eaad33b9c9d5a225) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
16 */
17declare(strict_types=1);
18
19namespace Fisharebest\Webtrees\Statistics\Google;
20
21use Fisharebest\Webtrees\I18N;
22use Fisharebest\Webtrees\Statistics\Service\CenturyService;
23use Fisharebest\Webtrees\Tree;
24use Illuminate\Database\Capsule\Manager as DB;
25use Illuminate\Database\Query\JoinClause;
26use stdClass;
27
28/**
29 * A chart showing the average number of children by century.
30 */
31class ChartChildren
32{
33    /**
34     * @var Tree
35     */
36    private $tree;
37
38    /**
39     * @var CenturyService
40     */
41    private $century_service;
42
43    /**
44     * Constructor.
45     *
46     * @param Tree $tree
47     */
48    public function __construct(Tree $tree)
49    {
50        $this->tree            = $tree;
51        $this->century_service = new CenturyService();
52    }
53
54    /**
55     * Returns the related database records.
56     *
57     * @return stdClass[]
58     */
59    private function queryRecords(): array
60    {
61        $query = DB::table('families')
62            ->selectRaw('ROUND(AVG(f_numchil), 2) AS num')
63            ->selectRaw('ROUND((d_year + 49) / 100) AS century')
64            ->join('dates', static function (JoinClause $join): void {
65                $join->on('d_file', '=', 'f_file')
66                    ->on('d_gid', '=', 'f_id');
67            })
68            ->where('f_file', '=', $this->tree->id())
69            ->where('d_julianday1', '<>', 0)
70            ->where('d_fact', '=', 'MARR')
71            ->whereIn('d_type', ['@#DGREGORIAN@', '@#DJULIAN@'])
72            ->groupBy(['century'])
73            ->orderBy('century');
74
75        return $query->get()->all();
76    }
77
78    /**
79     * Creates a children per family chart.
80     *
81     * @return string
82     */
83    public function chartChildren(): string
84    {
85        $data = [
86            [
87                I18N::translate('Century'),
88                I18N::translate('Average number')
89            ]
90        ];
91
92        foreach ($this->queryRecords() as $record) {
93            $data[] = [
94                $this->century_service->centuryName((int) $record->century),
95                (float) $record->num
96            ];
97        }
98
99        $chart_title   = I18N::translate('Average number of children per family');
100        $chart_options = [
101            'title' => $chart_title,
102            'subtitle' => '',
103            'legend' => [
104                'position'  => 'none',
105            ],
106            'vAxis' => [
107                'title' => I18N::translate('Number of children'),
108            ],
109            'hAxis' => [
110                'title' => I18N::translate('Century'),
111            ],
112            'colors' => [
113                '#84beff'
114            ],
115        ];
116
117        return view(
118            'statistics/other/charts/column',
119            [
120                'data'          => $data,
121                'chart_options' => $chart_options,
122                'chart_title'   => $chart_title,
123            ]
124        );
125    }
126}
127