root/g-map/files/lib/data/gmap/GmapApi.class.php @ 1306

<?php

/**
 * gets several positions and returns a clustered array
 *
 * @author      Torben Brodt
 * @license     GNU General Public License <http://opensource.org/licenses/gpl-3.0.html>
 */
class GmapApi extends DatabaseObject {
        protected $apikey = null;
        protected $cache_search = array();

        /**
         * creates new instance
         */
        public function __construct() {
                $apikey = GMAP_API_KEY;
                $apikey = explode("\n", StringUtil::unifyNewlines($apikey));
                $apikey = $apikey[0];
                $apikey = explode(":", $apikey);
                
                // this is the way, woltlab wants the users to enter their api key
                if(count($apikey) == 2) {
                        $this->apikey = $apikey[1];
                }

                // this is the way, almost all of the woltlab users really enter their api key
                else if(!empty($apikey)) {
                        $this->apikey = $apikey[0];
                }
        }

        /**
         * is active? api key existent?
         *
         * @return      boolean
         */
        public function isActive() {
                return !empty($this->apikey);
        }
        
        public function getFields() {
                if(defined('GMAP_CUSTOMINPUT') && !empty(GMAP_CUSTOMINPUT)) {
                        $cols = explode(",", GMAP_CUSTOMINPUT);
                } else {
                        $cols = array('location');
                }
                return $cols;
        }
        
        public function getColumn() {
                $cols = array();
                foreach($this->getFields() as $field) {
                        $cols[] = User::getUserOptionID($field);
                }

                $col = array();
                foreach($cols as $id) {
                        $col[] = 'CONCAT(userOption'.$id.', IF(userOption'.$id.' = '', '', ' '))';
                }
                $col = 'CONCAT('.implode(',', $col).')';
                
                return $col;
        }
        
        /**
         * ask google for geopositions
         * 
         * @param       $location               string
         * @return                              array<float>    keys are lat and lon
         */
        public function search($location) {

                if(!$this->isActive()) {
                        return;
                }

                $lookupstring = urlencode(StringUtil::trim($location));
                if(isset($this->cache_search[$lookupstring])) {
                        return $this->cache_search[$lookupstring];
                }
                
                $url = "http://maps.google.com/maps/geo?q=".$lookupstring."&key=".$this->apikey."&output=csv";
                
                require_once(WCF_DIR.'lib/util/FileUtil.class.php');
                $res = array();
                try {
                        $tmp = FileUtil::downloadFileFromHttp($url, 'gmap.search');
                        foreach(file($tmp) as $row) {
                                if (preg_match('/^200,[^,]+,([^,]+),([^,]+)$/', $row, $hits)) {
                                        $res = array(
                                                'lat' => trim($hits[1]),
                                                'lon' => trim($hits[2])
                                        );
                                        break;
                                }
                        }
                        @unlink($tmp);
                } catch(Exception $e) {
                        error_log($e->getMessage());
                }

                return $this->cache_search[$lookupstring] = $res;
        }
}