Subversion-Projekte lars-tiefland.php_share

<?php

/*

 *  $Id$

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * This software consists of voluntary contributions made by many individuals

 * and is licensed under the LGPL. For more information, see

 * <http://www.doctrine-project.org>.

 */

/**

 * Easily add longitude and latitude columns to your records and use inherited functionality for

 * calculating distances

 *

 * @package     Doctrine

 * @subpackage  Template

 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL

 * @link        www.doctrine-project.org

 * @since       1.0

 * @version     $Revision$

 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>

 * @author      Jonathan H. Wage <jonwage@gmail.com>

 */

class Doctrine_Template_Geographical extends Doctrine_Template

{

    /**

     * Array of geographical options

     *

     * @var string

     */

    protected $_options = array('latitude' =>  array('name'     =>  'latitude',

                                                     'type'     =>  'double',

                                                     'size'     =>  null,

                                                     'options'  =>  array()),

                                'longitude' => array('name'     =>  'longitude',

                                                     'type'     =>  'double',

                                                     'size'     =>  null,

                                                     'options'  =>  array()));

    /**

     * Set table definition for Geographical behavior

     *

     * @return void

     */

    public function setTableDefinition()

    {

        $this->hasColumn($this->_options['latitude']['name'], $this->_options['latitude']['type'], $this->_options['latitude']['size'], $this->_options['latitude']['options']);

        $this->hasColumn($this->_options['longitude']['name'], $this->_options['longitude']['type'], $this->_options['longitude']['size'], $this->_options['longitude']['options']);

    }

    /**

     * Initiate and get a distance query with the select parts for the number of kilometers and miles

     * between this record and other zipcode records in the database

     *

     * @return Doctrine_Query $query

     */

    public function getDistanceQuery()

    {

        $invoker = $this->getInvoker();

        $query = $invoker->getTable()->createQuery();

        $rootAlias = $query->getRootAlias();

        $latName = $this->_options['latitude']['name'];

        $longName = $this->_options['longitude']['name'];

        $query->addSelect($rootAlias . '.*');

        $sql = "((ACOS(SIN(%s * PI() / 180) * SIN(" . $rootAlias . "." . $latName . " * PI() / 180) + COS(%s * PI() / 180) * COS(" . $rootAlias . "." . $latName . " * PI() / 180) * COS((%s - " . $rootAlias . "." . $longName . ") * PI() / 180)) * 180 / PI()) * 60 * %s) as %s";

        $milesSql = sprintf($sql, $invoker->get($latName), $invoker->get($latName), $invoker->get($longName), '1.1515', 'miles');

        $query->addSelect($milesSql);

        $kilometersSql = sprintf($sql, $invoker->get($latName), $invoker->get($latName), $invoker->get($longName), '1.1515 * 1.609344', 'kilometers');

        $query->addSelect($kilometersSql);

        return $query;

    }

    /**

     * Get distance between this record and another

     *

     * @param string $Doctrine_Record

     * @param string $kilometers

     * @return integer

     */

    public function getDistance(Doctrine_Record $record, $kilometers = false)

    {

        $query = $this->getDistanceQuery($kilometers);

        $conditions = array();

        $values = array();

        foreach ((array) $record->getTable()->getIdentifier() as $id) {

            $conditions[] = $query->getRootAlias() . '.' . $id . ' = ?';

            $values[] = $record->get($id);

        }

        $where = implode(' AND ', $conditions);

        $query->addWhere($where, $values);

        $query->limit(1);

        $result = $query->execute()->getFirst();

        if (isset($result['kilometers']) && $result['miles']) {

            return $kilometers ? $result->get('kilometers'):$result->get('miles');

        } else {

            return 0;

        }

    }

}