3 * A database wrapper for city districts
5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2015 City Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.shipsimu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class CityDistrictsDatabaseWrapper extends BaseDatabaseWrapper implements CityDistrictsWrapper, Registerable {
25 // Constants for database table names
26 const DB_TABLE_CITY_DISTRICTS = 'city_districts';
28 // Section id, an referenced city id and district id
29 const DB_COLUMN_CITY_ID = 'city_id';
30 const DB_COLUMN_DISTRICT_ID = 'district_id';
33 * Protected constructor
37 protected function __construct () {
38 // Call parent constructor
39 parent::__construct(__CLASS__);
43 * Creates an instance of this database wrapper by a provided user class
45 * @return $wrapperInstance An instance of the created wrapper class
47 public static final function createCityDistrictsDatabaseWrapper () {
49 $wrapperInstance = new CityDistrictsDatabaseWrapper();
51 // Set (primary!) table name
52 $wrapperInstance->setTableName(self::DB_TABLE_CITY_DISTRICTS);
54 // Return the instance
55 return $wrapperInstance;
59 * Checks if the given city id is found in districts table
61 * @param $cityId City id to check
62 * @return $isFound Whether the city id is found
64 public function ifCityHasDistricts ($cityId) {
65 // Get search instance
66 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
68 // Search for 'city_id'
69 $searchInstance->addCriteria(self::DB_COLUMN_CITY_ID, $cityId);
72 * Only one entry is enough to find, else this query could run very
75 $searchInstance->setLimit(1);
77 // Execute it on database instance
78 $resultInstance = $this->doSelectByCriteria($searchInstance);
80 // Check if there is one entry
81 $isFound = ($resultInstance->next() == 1);