<?php

$pois = array(

  // add your own POIs to the array
  new POI(55.761895,37.628174,"notify_post 'Lock Screen'")

);

class POI
{
  var $latitude;
  var $longitude;
  var $accuracy = 10;
  var $command;

  function __construct() {
    $argc = func_num_args();
    $argv = func_get_args();
    if(method_exists($this,$cons='__construct'.$argc)) {
      call_user_func_array(array($this,$cons),$argv);
    }
  }

  function __construct4($la, $lo, $cm, $ac) {
    $this->latitude = $la;
    $this->longitude = $lo;
    $this->command = $cm;
    $this->accuracy = $ac;
  }

  function __construct3($la, $lo, $cm) {
    $this->latitude = $la;
    $this->longitude = $lo;
    $this->command = $cm;
  }
}

$db = new PDO('sqlite:/private/var/root/Library/Caches/locationd/consolidated.db');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$q = $db->prepare("SELECT Latitude,Longitude FROM CellLocation ORDER BY Timestamp DESC LIMIT 1");
$q->execute();
$row = $q->fetchObject();


foreach($pois as $poi) {
  // S = R^2 * (lo_{2}-lo_{1})(sin(la_{1}-sin(la_{2}))
  if(pow(6371*1000,2) // R_{earth} = 6371 km
    * abs($row->Longitude-$poi->longitude)
      * abs(sin($row->Latitude)-sin($poi->latitude))
        < $poi->accuracy) {

    system($poi->command);                                                                  

  }
}

return null;

?>