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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2021 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\Webtrees\Gedcom;
use Fisharebest\Webtrees\PlaceLocation;
use Fisharebest\Webtrees\Services\MapDataService;
use Illuminate\Database\Capsule\Manager as DB;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
use function addcslashes;
use function array_reverse;
use function array_unshift;
use function count;
use function implode;
use function preg_replace;
use function response;
/**
* Export geographic data.
*/
class MapDataExportGeoJson implements RequestHandlerInterface
{
private MapDataService $map_data_service;
/**
* Dependency injection.
*
* @param MapDataService $map_data_service
*/
public function __construct(MapDataService $map_data_service)
{
$this->map_data_service = $map_data_service;
}
/**
* @param ServerRequestInterface $request
*
* @return ResponseInterface
*/
public function handle(ServerRequestInterface $request): ResponseInterface
{
$parent_id = $request->getAttribute('parent_id');
if ($parent_id === null) {
$parent = new PlaceLocation('');
} else {
$parent = $this->map_data_service->findById((int) $parent_id);
}
for ($tmp = $parent, $hierarchy = []; $tmp->id() !== null; $tmp = $tmp->parent()) {
$hierarchy[] = $tmp->locationName();
}
// Create the file name
$filename = preg_replace('/[^\p{L}]+/u', '-', $hierarchy[0] ?? 'Global') . '.geojson';
// Recursively search for child places
$features = [];
$queue = [[
$parent->id(), array_reverse($hierarchy), $parent->latitude(), $parent->longitude()
]];
while ($queue !== []) {
[$id, $hierarchy, $latitude, $longitude] = array_shift($queue);
if ($latitude !== null && !$longitude !== null) {
$features[] = [
'type' => 'Feature',
'geometry' => [
'type' => 'Point',
'coordinates' => [
(float) $longitude,
(float) $latitude,
],
],
'properties' => [
'name' => implode(Gedcom::PLACE_SEPARATOR, array_reverse($hierarchy)),
],
];
}
$query = DB::table('place_location');
// Data for the next level.
if ($id === null) {
$query->whereNull('parent_id');
} else {
$query->where('parent_id', '=', $id);
}
$rows = $query
->orderBy('place', 'DESC')
->select(['id', 'place', 'latitude', 'longitude'])
->get();
$next_level = count($hierarchy);
foreach ($rows as $row) {
$hierarchy[$next_level] = $row->place;
array_unshift($queue, [$row->id, $hierarchy, $row->latitude, $row->longitude]);
}
}
$geojson = [
'type' => 'FeatureCollection',
'features' => $features,
];
$filename = addcslashes($filename, '"');
return response($geojson)
->withHeader('Content-Type', 'application/vnd.geo+json')
->withHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
}
}
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