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Current File : /var/www/html/webtrees/app/PlaceLocation.php
<?php
/**
* webtrees: online genealogy
* Copyright (C) 2023 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;
use Illuminate\Database\Capsule\Manager as DB;
use Illuminate\Database\Query\Builder;
use Illuminate\Support\Collection;
use function max;
use function min;
use function preg_split;
use function trim;
use const PREG_SPLIT_NO_EMPTY;
/**
* Class PlaceLocation
*/
class PlaceLocation
{
// e.g. "Westminster, London, England"
private string $location_name;
/** @var Collection<int,string> The parts of a location name, e.g. ["Westminster", "London", "England"] */
private Collection $parts;
/**
* Create a place-location.
*
* @param string $location_name
*/
public function __construct(string $location_name)
{
// Ignore any empty parts in location names such as "Village, , , Country".
$location_name = trim($location_name);
$this->parts = new Collection(preg_split(Gedcom::PLACE_SEPARATOR_REGEX, $location_name, -1, PREG_SPLIT_NO_EMPTY));
// Rebuild the location name in the correct format.
$this->location_name = $this->parts->implode(Gedcom::PLACE_SEPARATOR);
}
/**
* Get the higher level location.
*
* @return PlaceLocation
*/
public function parent(): PlaceLocation
{
return new self($this->parts->slice(1)->implode(Gedcom::PLACE_SEPARATOR));
}
/**
* The database row id that contains this location.
* Note that due to database collation, both "Quebec" and "Québec" will share the same row.
*
* @return int|null
*/
public function id(): ?int
{
// The "top-level" location won't exist in the database.
if ($this->parts->isEmpty()) {
return null;
}
return Registry::cache()->array()->remember('location-' . $this->location_name, function () {
$parent_id = $this->parent()->id();
$place = $this->parts->first();
$place = mb_substr($place, 0, 120);
if ($parent_id === null) {
$location_id = DB::table('place_location')
->where('place', '=', $place)
->whereNull('parent_id')
->value('id');
} else {
$location_id = DB::table('place_location')
->where('place', '=', $place)
->where('parent_id', '=', $parent_id)
->value('id');
}
$location_id ??= DB::table('place_location')->insertGetId([
'parent_id' => $parent_id,
'place' => $place,
]);
return (int) $location_id;
});
}
/**
* Does this location exist in the database? Note that calls to PlaceLocation::id() will
* create the row, so this function is only meaningful when called before a call to PlaceLocation::id().
*
* @return bool
*/
public function exists(): bool
{
$parent_id = null;
foreach ($this->parts->reverse() as $place) {
if ($parent_id === null) {
$parent_id = DB::table('place_location')
->whereNull('parent_id')
->where('place', '=', mb_substr($place, 0, 120))
->value('id');
} else {
$parent_id = DB::table('place_location')
->where('parent_id', '=', $parent_id)
->where('place', '=', mb_substr($place, 0, 120))
->value('id');
}
if ($parent_id === null) {
return false;
}
}
return true;
}
/**
* @return object
*/
private function details(): object
{
return Registry::cache()->array()->remember('location-details-' . $this->id(), function () {
// The "top-level" location won't exist in the database.
if ($this->parts->isEmpty()) {
return (object) [
'latitude' => null,
'longitude' => null,
];
}
$row = DB::table('place_location')
->where('id', '=', $this->id())
->select(['latitude', 'longitude'])
->first();
if ($row->latitude !== null) {
$row->latitude = (float) $row->latitude;
}
if ($row->longitude !== null) {
$row->longitude = (float) $row->longitude;
}
return $row;
});
}
/**
* Latitude of the location.
*
* @return float|null
*/
public function latitude(): ?float
{
return $this->details()->latitude;
}
/**
* Longitude of the location.
*
* @return float|null
*/
public function longitude(): ?float
{
return $this->details()->longitude;
}
/**
* @return string
*/
public function locationName(): string
{
return (string) $this->parts->first();
}
/**
* Find a rectangle that (approximately) encloses this place.
*
* @return array<array<float>>
*/
public function boundingRectangle(): array
{
if ($this->id() === null) {
return [[-180.0, -90.0], [180.0, 90.0]];
}
// Find our own co-ordinates and those of any child places
$latitudes = DB::table('place_location')
->whereNotNull('latitude')
->where(function (Builder $query): void {
$query
->where('parent_id', '=', $this->id())
->orWhere('id', '=', $this->id());
})
->groupBy(['latitude'])
->pluck('latitude')
->map(static function (string $x): float {
return (float) $x;
});
$longitudes = DB::table('place_location')
->whereNotNull('longitude')
->where(function (Builder $query): void {
$query
->where('parent_id', '=', $this->id())
->orWhere('id', '=', $this->id());
})
->groupBy(['longitude'])
->pluck('longitude')
->map(static function (string $x): float {
return (float) $x;
});
// No co-ordinates? Use the parent place instead.
if ($latitudes->isEmpty() || $longitudes->isEmpty()) {
return $this->parent()->boundingRectangle();
}
// Many co-ordinates? Generate a bounding rectangle that includes them.
if ($latitudes->count() > 1 || $longitudes->count() > 1) {
return [[$latitudes->min(), $longitudes->min()], [$latitudes->max(), $longitudes->max()]];
}
// Just one co-ordinate? Draw a box around it.
switch ($this->parts->count()) {
case 1:
// Countries
$delta = 5.0;
break;
case 2:
// Regions
$delta = 1.0;
break;
default:
// Cities and districts
$delta = 0.2;
break;
}
return [[
max($latitudes->min() - $delta, -90.0),
max($longitudes->min() - $delta, -180.0),
], [
min($latitudes->max() + $delta, 90.0),
min($longitudes->max() + $delta, 180.0),
]];
}
}
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