<?php
if ($_SERVER["SCRIPT_FILENAME"] == __FILE__) {
  	@header('Location: /');
  	exit;
}
/* ==============================================================
 * Usuarios y Sesiones
 * --------------------------------------------------------------
 */

class User_class {

	private $id = '';
	private $group = '';
	private $name = '';
	private $lang = '';
	private $is_login = false;
	private $folder_id = '';
	private $folder_name = '';
	private $message = '';
	private $trash = false;

	// ----------------------------------------------------------
	public function __construct( ) {
		$this->id = '';
		$this->group = '';
		$this->name = '';
		$this->lang = '';
		$this->is_login = false;
		$this->folder_id = kHOME_ID;
		$this->folder_name = '';  //kHOME_NAME;
		$this->message = '';
		$this->trash = false;
	}
	// ----------------------------------------------------------
	private function reset_data( ) {
		$this->id = '';
		$this->group = '';
		$this->name = '';
		$this->lang = '';
		$this->is_login = false;
		$this->folder_id = kHOME_ID;
		$this->folder_name = '';  //kHOME_NAME;
		$this->message = '';
		$this->trash = false;
	}
	// ----------------------------------------------------------
	public function login( $user, $pass, $lang ) {
		$this->reset_data();
		$this->lang = $lang;
		$this->is_login = $this->sql_login_ok( $user, $pass );
		if ($this->is_login) {
			$this->open_session( );
		} else {
			$this->logoff( );
		}
		return $this->is_login;
	}
	// ----------------------------------------------------------
	public function logoff( ) {
		$this->close_session();
	}
	// ----------------------------------------------------------
	public function get_id( ) {
		if (isset($_SESSION["s_user_id"])) {
			return $_SESSION["s_user_id"];
		} else {
			return $this->$id;
		}
	}
	// ----------------------------------------------------------
	public function get_group( ) {
		if (isset($_SESSION["s_user_group"])) {
			return $_SESSION["s_user_group"];
		} else {
			return $this->$group;
		}
	}
	// ----------------------------------------------------------
	public function get_name( ) {
		if (isset($_SESSION["s_user_name"])) {
			return $_SESSION["s_user_name"];
		} else {
			return $this->$name;
		}
	}
	// ----------------------------------------------------------
	public function get_lang( ) {
		if (isset($_SESSION["s_user_lang"])) {
			return $_SESSION["s_user_lang"];
		} else {
			return $this->$lang;
		}
	}
	// ----------------------------------------------------------
	public function get_trash( ) {
		if (isset($_SESSION["s_user_trash"])) {
			return $_SESSION["s_user_trash"];
		} else {
			return $this->$trash;
		}
	}
	// ----------------------------------------------------------
	public function is_login( ) {
		if (isset($_SESSION["s_login"])) {
			return $_SESSION["s_login"];
		} else {
			return false;
		}
	}
	// ----------------------------------------------------------
	public function get_folder_id( ) {
		if (isset($_SESSION["s_folder_id"])) {
			return $_SESSION["s_folder_id"];
		} else {
			return $this->$folder_id;
		}
	}
	// ----------------------------------------------------------
	public function get_folder_name( ) {
		if (isset($_SESSION["s_folder_name"])) {
			return $_SESSION["s_folder_name"];
		} else {
			return $this->folder_name;
		}
	}
	// ----------------------------------------------------------
	public function set_folder( $folder_id, $folder_name ) {
		$_SESSION["s_folder_id"] = $folder_id;
		$_SESSION["s_folder_name"] = $folder_name;
	}
	// ----------------------------------------------------------
	public function get_message( ) {
		if (isset($_SESSION["s_message"])) {
			return $_SESSION["s_message"];
		} else {
			return $this->message;
		}
	}
	// ----------------------------------------------------------
	public function set_message( $message ) {
		$_SESSION["s_message"] = $message;
	}
	public function set_warning( $message ) {
		$_SESSION["s_message"] = "[WA]".$message;
	}
	public function set_error( $message ) {
		$_SESSION["s_message"] = "[ER]".$message;
	}
	public function set_success( $message ) {
		$_SESSION["s_message"] = "[OK]".$message;
	}
	// ----------------------------------------------------------
	public function any_message( ) {
		return (! empty($_SESSION["s_message"]));
	}
	// ----------------------------------------------------------
	public function clear_message( ) {
		$_SESSION["s_message"] = '';
	}
	// ----------------------------------------------------------
	public function get_ip( ) {
		return $_SERVER['REMOTE_ADDR'];
	}
	// ----------------------------------------------------------
	public function can_write( $access ) {
		if (empty($access)) {
			return true;
		} else {
			// Comprobamos Usuario
			$user_full = '#'.$this->get_id().'.1#';
			$user_read = '#'.$this->get_id().'.2#';
			$user_write = '#'.$this->get_id().'.3#';
			$pos = strpos( $access, $user_read );
			if ($pos === false) {
				$pos = strpos( $access, $user_write );
				if ($pos === false) {
					$pos = strpos( $access, $user_full );
					if ($pos === false) {
						// Comprobamos Grupo
						$group_full = '#'.$this->get_group().'.1#';
						$group_read = '#'.$this->get_group().'.2#';
						$group_write = '#'.$this->get_group().'.3#';
						$pos = strpos( $access, $group_read );
						if ($pos === false ) {
							$pos = strpos( $access, $group_write );
							if ($pos === false ) {
								$pos = strpos( $access, $group_full );
								if ($pos === false) {
									return false; // No debería llegar nunca aquí
								} else {
									return true;
								}
							} else {
								return true;
							}
						} else {
							return false;
						}
					} else {
						return true;
					}
				} else {
					return true;
				}
			} else {
				return false;
			}
		}
	}
	// ----------------------------------------------------------
	public function get_session_value( $session_key ) {
		return $_SESSION[$session_key];
	}
	// ----------------------------------------------------------
	public function set_session_value( $session_key, $session_value ) {
		$_SESSION[$session_key] = $session_value;
	}
	// ----------------------------------------------------------
	public function isset_session_value( $session_key ) {
		return isset($_SESSION[$session_key]);
	}
	// ----------------------------------------------------------
	public function unset_session_value( $session_key ) {
		if (isset($_SESSION[$session_key])) {
			unset($_SESSION[$session_key]);
		}
	}
	// ==========================================================
	// SQL
	// ----------------------------------------------------------
	private function sql_login_ok( $user, $pass ) {
		global $db;

		$q_login_SELECT = "USUARIO, GRUPO, CHAT, ELIM_PAP_WEB"
					. " from USUARIOS"
					. " where USUARIO='%s'"
						. " and CLAVE=CAST(SHA1('%s') AS CHAR)"
						. " and (TIPO=0 OR TIPO=2)";

		$query = sprintf($q_login_SELECT, $user, $pass);
		$result = $db->query_select($query);
		if ($result) {
			$row = $result->fetch_assoc();
			$this->id = $row["USUARIO"];
			$this->group = $row["GRUPO"];
			$this->name = $row["CHAT"];		// Nombre corrto o nick => mejor para mostrar
			//$this->name = $row["NOMBRE"];	// Nombre largo => demasiado farragoso
			$this->trash = ( $row["ELIM_PAP_WEB"] == 1 ? true : false );
			$result->close();

			// Verifica que lo encontrado es del usuario y algún registro nulo
			if ($this->id != $user) {
				$this->reset_data();
				return false;
			}
			return true;
		}
		return false;
	}

	// ==========================================================
	// SESSION
	// ----------------------------------------------------------
	private function get_session( ) {
		$this->id    = $_SESSION["s_user_id"];
		$this->group = $_SESSION["s_user_group"];
		$this->name  = $_SESSION["s_user_name"];
		$this->lang  = $_SESSION["s_user_lang"];
		$this->trash = $_SESSION["s_user_trash"];
		$this->is_login    = $_SESSION["s_login"];
		$this->folder_id   = $_SESSION["s_folder_id"];
		$this->folder_name = $_SESSION["s_folder_name"];
		$this->message     = $_SESSION["s_message"];
	}
	// ----------------------------------------------------------
	private function set_session( ) {
		$_SESSION["s_user_id"]    = $this->id;
		$_SESSION["s_user_group"] = $this->group;
		$_SESSION["s_user_name"]  = $this->name;
		$_SESSION["s_user_lang"]  = $this->lang;
		$_SESSION["s_user_trash"] = $this->trash;
		$_SESSION["s_login"]      = $this->is_login;
		$_SESSION["s_folder_id"]   = $this->folder_id;
		$_SESSION["s_folder_name"] = $this->folder_name;
		$_SESSION["s_message"]     = $this->message;
	}
	// ----------------------------------------------------------
	private function reset_session( ) {
		$this->reset_data();
		$this->set_session();
	}
	// ----------------------------------------------------------
	private function open_session( ) {
		$this->set_session();
	}
	// --------------------------------------------------------------
	private function close_session( ) {
		$this->reset_session();
		session_unset();
		session_destroy();
	}
}
// --------------------------------------------------------------
?>