xref: /webtrees/app/Http/RequestHandlers/UnconnectedPage.php (revision b6017f990d38d8c56e04c0096ce9a7e8745ad4ba) 
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\Http\RequestHandlers;
21
22use Fisharebest\Algorithm\ConnectedComponent;
23use Fisharebest\Webtrees\Http\ViewResponseTrait;
24use Fisharebest\Webtrees\I18N;
25use Fisharebest\Webtrees\Individual;
26use Fisharebest\Webtrees\Registry;
27use Fisharebest\Webtrees\Tree;
28use Fisharebest\Webtrees\User;
29use Illuminate\Database\Capsule\Manager as DB;
30use Psr\Http\Message\ResponseInterface;
31use Psr\Http\Message\ServerRequestInterface;
32use Psr\Http\Server\RequestHandlerInterface;
33
34use function assert;
35
36/**
37 * Find groups of unrelated individuals.
38 */
39class UnconnectedPage implements RequestHandlerInterface
40{
41    use ViewResponseTrait;
42
43    /**
44     * @param ServerRequestInterface $request
45     *
46     * @return ResponseInterface
47     */
48    public function handle(ServerRequestInterface $request): ResponseInterface
49    {
50        $tree = $request->getAttribute('tree');
51        assert($tree instanceof Tree);
52
53        $user = $request->getAttribute('user');
54        assert($user instanceof User);
55
56        $aliases    = (bool) ($request->getQueryParams()['aliases'] ?? false);
57        $associates = (bool) ($request->getQueryParams()['associates'] ?? false);
58
59        // Connect individuals using these links.
60        $links = ['FAMS', 'FAMC'];
61
62        if ($aliases) {
63            $links[] = 'ALIA';
64        }
65
66        if ($associates) {
67            $links[] = 'ASSO';
68            $links[] = '_ASSO';
69        }
70
71        $rows = DB::table('link')
72            ->where('l_file', '=', $tree->id())
73            ->whereIn('l_type', $links)
74            ->select(['l_from', 'l_to'])
75            ->get();
76
77        $graph = DB::table('individuals')
78            ->where('i_file', '=', $tree->id())
79            ->pluck('i_id')
80            ->mapWithKeys(static function (string $xref): array {
81                return [$xref => []];
82            })
83            ->all();
84
85        foreach ($rows as $row) {
86            $graph[$row->l_from][$row->l_to] = 1;
87            $graph[$row->l_to][$row->l_from] = 1;
88        }
89
90        $algorithm  = new ConnectedComponent($graph);
91        $components = $algorithm->findConnectedComponents();
92        $root       = $tree->significantIndividual($user);
93        $xref       = $root->xref();
94
95        /** @var Individual[][] */
96        $individual_groups = [];
97
98        foreach ($components as $component) {
99            if (!in_array($xref, $component, true)) {
100                $individual_groups[] = DB::table('individuals')
101                    ->where('i_file', '=', $tree->id())
102                    ->whereIn('i_id', $component)
103                    ->get()
104                    ->map(Registry::individualFactory()->mapper($tree))
105                    ->filter();
106            }
107        }
108
109        $title = I18N::translate('Find unrelated individuals') . ' — ' . e($tree->title());
110
111        $this->layout = 'layouts/administration';
112
113        return $this->viewResponse('admin/trees-unconnected', [
114            'aliases'           => $aliases,
115            'associates'        => $associates,
116            'root'              => $root,
117            'individual_groups' => $individual_groups,
118            'title'             => $title,
119            'tree'              => $tree,
120        ]);
121    }
122}
123