Magento Google Maps Geocoding Customer Addresses

gistfile1.aw

<?php
/**
 * @author Branko Ajzele <[email protected]>
 */
class Inchoo_Extension_Helper_Gmap extends Mage_Core_Helper_Abstract
{
    const GOOGLE_MAPS_HOST = 'maps.google.com';
    const CONFIG_PATH_GOOGLE_MAPS_API_KEY = 'inchoo_google/maps/api_key';
    
    public function getGoogleMapsApiKey()
    {
        return Mage::getStoreConfig(self::CONFIG_PATH_GOOGLE_MAPS_API_KEY);
    }
    
    /**
     *
     * @param Mage_Customer_Model_Address $address
     * @param boolean $saveCoordinatesToAddress
     * @param boolean $forceLookup
     * @return array Returns the array of float values like {[0] => float(18.4438156) [1] => float(45.5013644)}
     */
    public function fetchAddressGeoCoordinates(Mage_Customer_Model_Address $address, $saveCoordinatesToAddress = true, $forceLookup = false)
    {
        /**
         * USAGE EXAMPLE

            $customer = Mage::getModel('customer/customer');
            $customer->setWebsiteId(Mage::app()->getWebsite()->getId());
            $customer->loadByEmail('[email protected]');

            Mage::helper('inchoo/gmap')->fetchAddressGeoCoordinates($customer->getDefaultBillingAddress())
        
         */
        
        $coordinates = array();
        
        if ($address->getId() && $address->getGmapCoordinatePointX() && $address->getGmapCoordinatePointY() && $forceLookup == false) {
            $coordinates = array($address->getGmapCoordinatePointX(), $address->getGmapCoordinatePointY());
        } else if (($address->getId() && !$address->getGmapCoordinatePointX() && !$address->getGmapCoordinatePointY())
            OR ($address->getId() && $address->getGmapCoordinatePointX() && $address->getGmapCoordinatePointY() && $forceLookup == true)) {
            
            $lineAddress = $address->getStreet1(). ', '.$address->getPostcode().' '.$address->getCity().', '.$address->getCountry();
            
            $client = new Zend_Http_Client();
            $client->setUri('http://'.self::GOOGLE_MAPS_HOST.'/maps/geo');
            $client->setMethod(Zend_Http_Client::GET);
            $client->setParameterGet('output', 'json');
            $client->setParameterGet('key', $this->getGoogleMapsApiKey());
            $client->setParameterGet('q', $lineAddress);
            
            $response = $client->request();          
            
            if ($response->isSuccessful() && $response->getStatus() == 200) {
                $_response = json_decode($response->getBody());
                $_coordinates = @$_response->Placemark[0]->Point->coordinates;
                
                if (is_array($_coordinates) && count($_coordinates) >= 2) {                    
                    
                    $coordinates = array_slice($_coordinates, 0, 2);
                    
                    if ($saveCoordinatesToAddress) {
                        try {
                            $address->setGmapLng($coordinates[0]);
                            $address->setGmapLat($coordinates[1]);                          
                            
                            $address->save();
                        } catch (Exception $e) {
                            Mage::logException($e);
                        }                        
                    }
                }
            }
        }
        
        return $coordinates;
    }
}

NOTE: In order for this to work, you need to have "gmap_coordinate_point_x" and "gmap_coordinate_point_y" attributes created on customer.