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   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * IP Lookup utility functions
  20   *
  21   * @package    core
  22   * @subpackage iplookup
  23   * @copyright  2010 Petr Skoda {@link http://skodak.org}
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  /**
  30   * Returns location information
  31   * @param string $ip
  32   * @return array
  33   */
  34  function iplookup_find_location($ip) {
  35      global $CFG;
  36  
  37      $info = array('city'=>null, 'country'=>null, 'longitude'=>null, 'latitude'=>null, 'error'=>null, 'note'=>'',  'title'=>array());
  38  
  39      if (!empty($CFG->geoipfile) and file_exists($CFG->geoipfile)) {
  40          require_once('Net/GeoIP.php');
  41  
  42          $geoip = Net_GeoIP::getInstance($CFG->geoipfile, Net_GeoIP::STANDARD);
  43          $location = $geoip->lookupLocation($ip);
  44          $geoip->close();
  45  
  46          if (empty($location)) {
  47              $info['error'] = get_string('iplookupfailed', 'error', $ip);
  48              return $info;
  49          }
  50          if (!empty($location->city)) {
  51              $info['city'] = core_text::convert($location->city, 'iso-8859-1', 'utf-8');
  52              $info['title'][] = $info['city'];
  53          }
  54  
  55          if (!empty($location->countryCode)) {
  56              $countries = get_string_manager()->get_list_of_countries(true);
  57              if (isset($countries[$location->countryCode])) {
  58                  // prefer our localized country names
  59                  $info['country'] = $countries[$location->countryCode];
  60              } else {
  61                  $info['country'] = $location->countryName;
  62              }
  63              $info['title'][] = $info['country'];
  64  
  65          } else if (!empty($location->countryName)) {
  66              $info['country'] = $location->countryName;
  67              $info['title'][] = $info['country'];
  68          }
  69  
  70          $info['longitude'] = $location->longitude;
  71          $info['latitude']  = $location->latitude;
  72          $info['note'] = get_string('iplookupmaxmindnote', 'admin');
  73  
  74          return $info;
  75  
  76      } else {
  77          require_once($CFG->libdir.'/filelib.php');
  78  
  79          $ipdata = download_file_content('http://www.geoplugin.net/json.gp?ip='.$ip);
  80          if ($ipdata) {
  81              $ipdata = preg_replace('/^geoPlugin\((.*)\)\s*$/s', '$1', $ipdata);
  82              $ipdata = json_decode($ipdata, true);
  83          }
  84          if (!is_array($ipdata)) {
  85              $info['error'] = get_string('cannotgeoplugin', 'error');
  86              return $info;
  87          }
  88          $info['latitude']  = (float)$ipdata['geoplugin_latitude'];
  89          $info['longitude'] = (float)$ipdata['geoplugin_longitude'];
  90          $info['city']      = s($ipdata['geoplugin_city']);
  91  
  92          $countrycode = $ipdata['geoplugin_countryCode'];
  93          $countries = get_string_manager()->get_list_of_countries(true);
  94          if (isset($countries[$countrycode])) {
  95              // prefer our localized country names
  96              $info['country'] = $countries[$countrycode];
  97          } else {
  98              $info['country'] = s($ipdata['geoplugin_countryName']);
  99          }
 100  
 101          $info['note'] = get_string('iplookupgeoplugin', 'admin');
 102  
 103          $info['title'][] = $info['city'];
 104          $info['title'][] = $info['country'];
 105  
 106          return $info;
 107      }
 108  
 109  }