<?php
class Geocoder
{
    var $baseUrl = 'http://maps.google.com/maps/api/geocode/%s?sensor=%s&language=%s';

    function geocode($address, $output = 'json', $sensor = 'false', $language = 'fr')
    {
        if(is_array($address)){
            $address = implode(',', $address);
        }

        $requestUrl = $this->baseUrl.'&address=%s';
        $requestUrl = sprintf($requestUrl, $output, $sensor, $language, urlencode($address));

        return file_get_contents($requestUrl);
    }

    function reverse($latitude, $longitude, $output = 'json', $sensor = 'false', $language = 'fr'){
        $requestUrl = $this->baseUrl.'&latlng=%s,%s';
        $requestUrl = sprintf($requestUrl, $output, $sensor, $language, $latitude, $longitude);

        return file_get_contents($requestUrl);
    }

    /*
    http://code.google.com/intl/fr/apis/maps/documentation/javascript/services.html#GeocodingAddressTypes
    */
    function getAddressComponents($json, $types = array('country')){
        $decode = json_decode($json, true);

        if(isset($decode['status']) && strtoupper($decode['status']) == 'OK'){
            if(isset($decode['results'][0]['address_components'])){
                $addressComponents = $decode['results'][0]['address_components'];
                if(!is_array($types)){
                    $types = array($types);
                }
                $tmp = array();
                foreach($addressComponents as $a){
                    foreach($a['types'] as $t){
                        if(in_array($t, $types)){
                            $tmp[$t] = $a;
                            unset($tmp[$t]['types']);
                        }
                    }
                }
                if(!empty($tmp)) return $tmp;
                else return false;
            }
            else return false;
        }
        else{
            trigger_error('Google Geocoding API - Status: '.$decode['status']);
            return false;
        }
    }

    function getHierarchyResult($addressComponents){
        $order = array(
            'country',
            'administrative_area_level_1',
            'administrative_area_level_2',
            'administrative_area_level_3',
            'colloquial_area',
            'locality',
            'sublocality',
            'postal_code'
        );

        $tmp = array();
        foreach($order as $o){
            if(isset($addressComponents[$o])){
                $tmp[$o] = $addressComponents[$o];
            }
        }
        return $tmp;
    }

}
?>