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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2026 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Http\RequestHandlers;
use Fisharebest\Algorithm\ConnectedComponent;
use Fisharebest\Webtrees\DB;
use Fisharebest\Webtrees\Http\ViewResponseTrait;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Individual;
use Fisharebest\Webtrees\Registry;
use Fisharebest\Webtrees\Validator;
use Illuminate\Support\Collection;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
use function count;
use function in_array;
use function strtolower;
final class UnconnectedPage implements RequestHandlerInterface
{
use ViewResponseTrait;
public function handle(ServerRequestInterface $request): ResponseInterface
{
$tree = Validator::attributes($request)->tree();
$user = Validator::attributes($request)->user();
$aliases = Validator::queryParams($request)->boolean('aliases', false);
$associates = Validator::queryParams($request)->boolean('associates', false);
// Connect individuals using these links.
$links = ['FAMS', 'FAMC'];
if ($aliases) {
$links[] = 'ALIA';
}
if ($associates) {
$links[] = 'ASSO';
$links[] = '_ASSO';
}
$rows = DB::table('link')
->where('l_file', '=', $tree->id())
->whereIn('l_type', $links)
->select(['l_from', 'l_to'])
->get();
$graph = DB::table('individuals')
->where('i_file', '=', $tree->id())
->pluck('i_id')
->mapWithKeys(static fn (string $xref): array => [$xref => []])
->all();
foreach ($rows as $row) {
$graph[$row->l_from][$row->l_to] = 1;
$graph[$row->l_to][$row->l_from] = 1;
}
$algorithm = new ConnectedComponent($graph);
$components = $algorithm->findConnectedComponents();
$root = $tree->significantIndividual($user);
$xref = $root->xref();
/** @var Individual[][] */
$individual_groups = [];
foreach ($components as $component) {
// Allow for upper/lower-case mismatches, and all-numeric XREFs
$component = array_map(static fn ($x): string => strtolower((string) $x), $component);
if (!in_array(strtolower($xref), $component, true)) {
$individual_groups[] = DB::table('individuals')
->where('i_file', '=', $tree->id())
->whereIn('i_id', $component)
->get()
->map(Registry::individualFactory()->mapper($tree))
->filter();
}
}
usort($individual_groups, static fn (Collection $x, Collection $y): int => count($x) <=> count($y));
$title = I18N::translate('Find unrelated individuals') . ' — ' . e($tree->title());
$this->layout = 'layouts/administration';
return $this->viewResponse('admin/trees-unconnected', [
'aliases' => $aliases,
'associates' => $associates,
'root' => $root,
'individual_groups' => $individual_groups,
'title' => $title,
'tree' => $tree,
]);
}
}
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