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<?php |
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namespace LeKoala\GeoTools\Services; |
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use Exception; |
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use LeKoala\GeoTools\Models\Address; |
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use LeKoala\GeoTools\Models\Country; |
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use LeKoala\GeoTools\Models\Coordinates; |
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use SilverStripe\Control\Email\Email; |
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/** |
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* @link https://wiki.openstreetmap.org/wiki/Nominatim |
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* @link https://github.com/maxhelias/php-nominatim |
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*/ |
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class Nominatim implements Geocoder |
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{ |
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const API_URL = 'https://nominatim.openstreetmap.org/{service}'; |
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const SEARCH_SERVICE = 'search'; |
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const REVERSE_SERVICE = 'reverse'; |
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const LOOKUP_SERVICE = 'lookup'; |
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/** |
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* @param ?string $query |
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* @param array<int|string,mixed> $params countrycodes |
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* @return Address |
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* @throws Exception when there is a problem with the api, otherwise may return an empty address |
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*/ |
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protected function query($query, $params = []) |
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{ |
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$service = self::SEARCH_SERVICE; |
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if (isset($params['service'])) { |
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$service = $params['service']; |
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unset($params['service']); |
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} |
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if ($query) { |
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$params['q'] = $query; |
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} |
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$url = self::API_URL; |
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$url = str_replace('{service}', $service, $url); |
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$defaultParams = [ |
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'email' => Email::config()->admin_email, |
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'limit' => 1, |
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'format' => 'jsonv2', |
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'addressdetails' => 1 |
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]; |
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$params = array_merge($defaultParams, $params); |
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$url .= '?' . http_build_query($params); |
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// Create a stream |
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$opts = [ |
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"http" => [ |
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"method" => "GET", |
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"header" => implode("\r\n", [ |
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"Accept: application/json", |
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"Accept-Encoding: gzip, deflate, br", |
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"Accept-Language: en", |
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"Cache-Control: no-cache", |
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"Pragma: no-cache", |
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"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36", |
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]) |
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] |
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]; |
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$context = stream_context_create($opts); |
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$result = file_get_contents($url, false, $context); |
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if (!$result) { |
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throw new Exception("The api returned no result"); |
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} |
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$data = json_decode($result, true); |
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if (!$data) { |
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throw new Exception("Failed to decode api results"); |
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} |
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$location = []; |
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$countryCode = $countryName = null; |
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$lat = $lon = null; |
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// in reverse geocoding, it's only one result |
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if (isset($data['place_id'])) { |
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$row = $data; |
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} else { |
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$row = $data[0]; |
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} |
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if (isset($row['address'])) { |
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$address = $row['address']; |
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$location = [ |
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'streetName' => $address['road'] ?? $address['building'] ?? null, |
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'streetNumber' => $address['house_number'] ?? null, |
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'postalCode' => $address['postcode'] ?? null, |
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'locality' => $address['city'] ?? null, |
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]; |
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$countryCode = $address['country_code'] ?? null; |
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$countryName = $address['country'] ?? null; |
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} |
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if (!empty($row['lat'])) { |
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$lat = $row['lat']; |
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$lon = $row['lon']; |
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} |
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$country = new Country($countryCode, $countryName); |
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$coordinates = new Coordinates($lat, $lon); |
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return new Address($location, $country, $coordinates); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function reverseGeocode($lat, $lon, $params = []) |
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{ |
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$params['service'] = self::REVERSE_SERVICE; |
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$params['lat'] = $lat; |
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$params['lon'] = $lon; |
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return $this->query(null, $params); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function geocode($address, $params = []) |
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{ |
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return $this->query($address, $params); |
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} |
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} |
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lekoala /
silverstripe-geotools
