<?php
require_once("usertable.php");
try {
  $user = $db->real_escape_string($_REQUEST['user']);
  $pubkey = $db->real_escape_string($_REQUEST['pubkey']);
  $q = $db->query("select * from user where name='$user' and pubkey='$pubkey';");
  if ($q->num_rows==1) {
    echo json_encode(true);
  } elseif ($q->num_rows==0) {
    $q = $db->query("insert into user (name, pubkey) values ('$user', '$pubkey');");
    echo json_encode(true);
  } else {
    echo json_encode(false);
  }
} catch (Exception $e) {
  echo json_encode(false);
}
?>