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<?php
/**
* @package com_zoo
* @author YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license http://www.gnu.org/licenses/gpl.html GNU/GPL
*/
/**
* Googlemaps helper class.
*
* @package Component.Helpers
* @since 2.0
*/
class GooglemapsHelper extends AppHelper {
/**
* Strips text
*
* @param string $text The text to strip
*
* @return string The stripped text
* @since 2.0
*/
public function stripText($text) {
$text = str_replace(array("\r\n", "\n", "\r", "\t"), "", $text);
$text = addcslashes($text, "'");
return $text;
}
/**
* Locate
*
* @param string $location The location
* @param string $cache The cache to lock in
*
* @return string The geocoded location
* @since 2.0
*/
public function locate($location, $cache = null) {
// check if location are lng / lat values
$location = trim($location);
if (preg_match('/^([-]?(?:[0-9]+(?:\.[0-9]+)?|\.[0-9]+)),\s?([-]?(?:[0-9]+(?:\.[0-9]+)?|\.[0-9]+))$/i', $location, $regs)) {
if ($location == $regs[0]) {
return array('lat' => $regs[1], 'lng' => $regs[2]);
}
}
// use geocode to translate location
return $this->geoCode($location, $cache);
}
/**
* Geocode an address
*
* @param string $address The address to locate
* @param string $cache The cache to lock in
*
* @return array coordinates
* @since 2.0
*/
public function geoCode($address, $cache = null) {
// use cache result
if ($cache !== null && $value = $cache->get($address)) {
if (preg_match('/^([-]?(?:[0-9]+(?:\.[0-9]+)?|\.[0-9]+)),\s?([-]?(?:[0-9]+(?:\.[0-9]+)?|\.[0-9]+))$/i', $value, $regs)) {
return array('lat' => $regs[1], 'lng' => $regs[2]);
}
}
// query google maps geocoder and parse result
$result = $this->queryGeoCoder($address);
$coordinates = null;
if (isset($result->status)) {
switch ($result->status) {
case 'OVER_QUERY_LIMIT':
throw new GooglemapsHelperException("Google Geocoding API error: You are over your quota.");
case 'ZERO_RESULTS':
throw new GooglemapsHelperException("Google Geocoding API error: Couldn't find passed in address ($address).");
case 'REQUEST_DENIED':
throw new GooglemapsHelperException("Google Geocoding API error: The request was denied.");
case 'INVALID_REQUEST':
throw new GooglemapsHelperException("Google Geocoding API error: The request was invalid.");
case 'OK':
if (isset($result->results) && $result = array_pop($result->results)) {
if (isset($result->geometry->location->lat, $result->geometry->location->lng)) {
$coordinates['lat'] = $result->geometry->location->lat;
$coordinates['lng'] = $result->geometry->location->lng;
}
}
// cache geocoder result
if ($cache !== null && $coordinates !== null) {
$cache->set($address, $coordinates['lat'].",".$coordinates['lng']);
}
}
}
return $coordinates;
}
/**
* Query the Geocoder for an address
*
* @param string $address The address to locate
*
* @return array result array
* @since 2.0
*/
public function queryGeoCoder($address) {
// query use http helper
$response = $this->app->http->get(sprintf('http://maps.google.com/maps/api/geocode/json?address=%s&sensor=false', urlencode($address)));
if (isset($response['body'])) {
return json_decode($response['body']);
}
return null;
}
}
/**
* GooglemapsHelperException identifies an Exception in the GooglemapsHelper class
* @see GooglemapsHelper
*/
class GooglemapsHelperException extends AppException {}