<?php
session_start();

//login
if ($ToDo=="Login")
{
  $Login    = (isset($_POST['Login']))    ?     $_POST['Login']    :"";
  $Password = (isset($_POST['Password'])) ? md5($_POST['Password']):"";

  if ($Login=="root")
  {
    global $CfgRootPassword;

    if ($Password==$CfgRootPassword)
    {
      MessageSuccess(LangSpell('ScentenceLoginSucceeded')."\n");
      $_SESSION['Id']=0;
      $_SESSION['Login']=$Login;
      $_SESSION['Time']=time();
    }
    else
    {
      MessageError(LangSpell('ScentenceLoginFailed')."\n");
      $_SESSION['Id']=0;
      $_SESSION['Login']="";
      $_SESSION['Time']=0;
    }
  }
  else if ($Login)
  {
    global $GlobalMysqlHandler;

    $query="SELECT * FROM `User` WHERE `Login` = '$Login' LIMIT 0 , 1";
    $query=mysqli_query($GlobalMysqlHandler, $query);
    $data=mysqli_fetch_array($query);

    if ($Password==$data['Password'])
    {
      MessageSuccess(LangSpell('ScentenceLoginSucceeded')."\n");
      $_SESSION['Id']=$data['Id'];
      $_SESSION['Login']=$Login;
      $_SESSION['Time']=time();
    }
    else
    {
      MessageError(LangSpell('ScentenceLoginFailed')."\n");
      $_SESSION['Id']=0;
      $_SESSION['Login']="";
      $_SESSION['Time']=0;
    }
  }
  else
  {
    MessageError(LangSpell('ScentenceNoLoginSpecified')."\n");
    $_SESSION['Id']=0;
    $_SESSION['Login']="";
    $_SESSION['Time']=0;
  }
}
//logout
else if ($ToDo=="Logout")
{
  $_SESSION['Id']=0;
  $_SESSION['Login']="";
  $_SESSION['Time']=0;
}
//load login from session
else
{
  $Id       = (isset($_SESSION['Id'])) ? $_SESSION['Id']:"";
  $Login    = (isset($_SESSION['Login'])) ? $_SESSION['Login']:"";
  $Time     = (isset($_SESSION['Time'])) ? $_SESSION['Time']:0;
  if ($Login && ((time()-$GlobalUserTimeout)<=$Time))
  {
    $_SESSION['Time']=time();
  }
  elseif ($Login)
  {
    MessageWarning(LangSpell('ScentenceLoginTimeoutExpired'));
    $_SESSION['Id']=0;
    $_SESSION['Login']="";
    $_SESSION['Time']=0;
  }
}

//login messages
if (isset($_SESSION['Login']) && $_SESSION['Login']=="root")
  MessageWarning(LangSpell('ScentenceLoggedAsRoot'));

//load user settings
UserLoadSettings();


/************
  functions
*************/
function UserLogout()
{
  $_SESSION['Id']=0;
  $_SESSION['Login']="";
  $_SESSION['Time']=0;
}

function UserIsLoggedIn()
{
  $ReturnValue=0;
  if (isset($_SESSION['Login']) && $_SESSION['Login'])
    $ReturnValue=1;
  else
    $ReturnValue=0;
  return $ReturnValue;
}

function UserGetLogin()
{
  return ((isset($_SESSION['Login']))? $_SESSION['Login']:"");
}

function UserGetId()
{
  return ((isset($_SESSION['Id']))? $_SESSION['Id']:0);
}

function UserHasRight($Right)
{
  $Ret=0;
  if (isset($_SESSION['Id']) && $_SESSION['Id']>0)
  {
    global $GlobalMysqlHandler;
    $RightsQuery = "SELECT `$Right` FROM `UserRights` WHERE `Id` =".$_SESSION['Id'];
    $RightsQuery = mysqli_query($GlobalMysqlHandler, $RightsQuery);
    if ($RightsQuery && mysqli_num_rows($RightsQuery))
    {
      $RightData = mysqli_fetch_array($RightsQuery);
      $Ret=(strtolower($RightData[$Right])=="true")? 1:0;
    }
    else
    {
      ErrorLog("[user.php] User with id '".$_SESSION['Id']."' not found in table 'UserRights' while asking for right '$Right'!");
    }
  }
  return ($Ret);
}

function UserLoadSettings()
{
  $Ret=0;
  global $GlobalMysqlHandler;

  global $GlobalTemplate;
  global $CfgStdTemplate;

  global $GlobalLanguage;
  global $CfgStdLanguage;

  if (isset($_SESSION['Id']) && $_SESSION['Id']>0)
  {
    $LoadQuery="SELECT `Template` , `Language` FROM `User` WHERE `Id` =".$_SESSION['Id'];
    $LoadQuery=mysqli_query($GlobalMysqlHandler, $LoadQuery);
    if ($LoadQuery)
    {
      $LoadValue=mysqli_fetch_array($LoadQuery);
      $GlobalTemplate=($LoadValue['Template'])? $LoadValue['Template']:$CfgStdTemplate;
      $GlobalLanguage=($LoadValue['Language'])? $LoadValue['Language']:$CfgStdLanguage;
      $Ret=1;
    }
    else
    {
      ErrorLog("[user.php] Not able to load vars for user with id = ".$_SESSION['Id']."!");
    }
  }
  return $Ret;
}

?>