<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 1.6                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2006                                  |
 +--------------------------------------------------------------------+
 | This file is a part of CiviCRM.                                    |
 |                                                                    |
 | CiviCRM is free software; you can copy, modify, and distribute it  |
 | under the terms of the Affero General Public License Version 1,    |
 | March 2002.                                                        |
 |                                                                    |
 | CiviCRM 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 Affero General Public License for more details.            |
 |                                                                    |
 | You should have received a copy of the Affero General Public       |
 | License along with this program; if not, contact the Social Source |
 | Foundation at info[AT]civicrm[DOT]org.  If you have questions       |
 | about the Affero General Public License or the licensing  of       |
 | of CiviCRM, see the Social Source Foundation CiviCRM license FAQ   |
 | http://www.civicrm.org/licensing/                                  |
 +--------------------------------------------------------------------+
*/

/**
 *
 * @package CRM
 * @author Donald A. Lobo <lobo@civicrm.org>
 * @copyright CiviCRM LLC (c) 2004-2006
 * $Id$
 *
 */
 
/**
 * Class that uses geocoder.us to retrieve the lat/long of an address
 */
class CRM_Utils_Geocode_Google {
    /**
     * server to retrieve the lat/long
     *
     * @var string
     * @static
     */
    static protected $_server = 'maps.google.com';

    /**
     * uri of service
     *
     * @var string
     * @static
     */
    static protected $_uri = '/maps/geo?q=';
    
    /**
     * function that takes an address object and gets the latitude / longitude for this
     * address. Note that at a later stage, we could make this function also clean up
     * the address into a more valid format
     *
     * @param object $address
     *
     * @return boolean true if we modified the address, false otherwise
     * @static
      */
    static function format( &$values ) {
        require_once 'CRM/Utils/Array.php';
        // we need a valid state and country, else we ignore
        if ( ! CRM_Utils_Array::value( 'state_province' , $values  ) &&
             ! CRM_Utils_Array::value( 'country'        , $values  ) ) {
            return false;
        }
        
        $config =& CRM_Core_Config::singleton( );
        
        $arg = "&output=xml&key=" . urlencode( $config->mapAPIKey );
        
        $add = '';

        if (  CRM_Utils_Array::value( 'street_address', $values ) ) {
            $add  = urlencode( str_replace('', '+', $values['street_address']) );
            $add .= ',+';
        }
        
        if (  CRM_Utils_Array::value( 'city', $values ) ) { 
            $add .= '+' . urlencode( str_replace('', '+', $values['city']) );
            $add .= ',+';
        }
        
        if (  CRM_Utils_Array::value( 'state_province', $values ) ) { 
            if ( CRM_Utils_Array::value( 'state_province_id', $values ) ) {
                $stateProvince = CRM_Core_DAO::getFieldValue( 'CRM_Core_DAO_StateProvince', $values['state_province_id'] );
            } else {
                $stateProvince = CRM_Core_DAO::getFieldValue( 'CRM_Core_DAO_StateProvince', $values['state_province'], 'name', 'abbreviation' );
            }
            $add .= '+' . urlencode( str_replace('', '+', $stateProvince) );
            $add .= ',+';
        }
        
        if (  CRM_Utils_Array::value( 'postal_code', $values ) ) { 
            $add .= '+' .urlencode( str_replace('', '+', $values['postal_code']) );
            $add .= ',+';
        }
        
        if (  CRM_Utils_Array::value( 'country', $values ) ) { 
            $add .= '+' . urlencode( str_replace('', '+', $values['country']) );
        }
        
        $query = 'http://' . self::$_server . self::$_uri . '?' . $add . $arg;
        
        require_once 'HTTP/Request.php';
        $request =& new HTTP_Request( $query );
        $request->sendRequest( );
        $string = $request->getResponseBody( );

        // CRM-1439: Google (sometimes?) returns data in ISO-8859-1
        // if so, use iconv to convert or (if iconv not available)
        //substitute the non-ASCII characters with question marks
        require_once 'CRM/Utils/String.php';
        if (!CRM_Utils_String::isUtf8($string)) {
            if (function_exists('iconv')) {
                $string = iconv('ISO-8859-1', 'UTF-8', $string);
            } else {
                $string = preg_replace('/[^\x20-\x7E]/', '?', $string);
            }
        }
        
        $xml = simplexml_load_string( $string );
        $ret = array( );
        $val = array( );
        if ( is_a($xml->Response->Placemark->Point, 'SimpleXMLElement') ) {
            $ret = $xml->Response->Placemark->Point->children();             
            $val = explode(',', (string)$ret[0]);
            if ( $val[0] && $val[1] ) {
                $values['geo_code_1'] = $val[1];
                $values['geo_code_2'] = $val[0];
            }
        }
        return true;
    }
}
?>