<?php
$ValidAccess = 2010;
require_once("include/globals.php");


$moduleName = "ajax.UserIdValidate.php";
// startLog($moduleName);

$return_data = array();
$return_data['ajax_return_code'] = 0;


// CSRF token validation
include "include/ajax.csrfToken.php";


// Get search text
$uid = db_escape_string(trim(strtolower($_GET['uid'])));
writeLog("uid: $uid");

if (strpos($uid, ' ') > 0) {
   $return_data['ajax_error_message'] = getLanguageText('ERRORMSG-INVALID-USER-ID');
   $return_data['ajax_return_code'] = -1;
}
else {
   switch ($uid) {
      case 'superuser':
      case 'admin':
         $return_data['ajax_return_code'] = 1;
         break;

      default:
         // Search for matching user records
         $query = "SELECT * FROM users " .
                  "WHERE school_num = $base_school_num " .
                  "AND userid = '$uid'";
         writeLog("query: $query\n");
         $results = db_query($query);

         // Set return data values
         $return_data['ajax_return_code'] = db_num_rows($results);
         break;
   }
}

writeLog("ajax_return_code: ".$return_data['ajax_return_code']);

writeLog("completed");
echo(json_encode($return_data));
return false;

?>