<?php

	namespace YetAnotherPanel;

	class User extends Core
	{

		private $isLoggedIn = false,
				$cache = array(),
				$id = 0,
				$userName = '';



		public function __construct()
		{

			$this->_checkSessions();

			if( $this->isLoggedIn() )
			{

				if( !$this->_grabCache() )
				{

					$this->_generateCache();

				}

			}

		}

		public function isLoggedIn()
		{

			return $this->isLoggedIn;

		}

		public function login( $userName, $passWord )
		{

			if( !$userName || !$passWord )
			{

				return 'All fields are required';

			}

			$query = $this->query('SELECT id FROM {prefix}users WHERE username = {0} AND password = {1} LIMIT 1;',
									array( $userName, $passWord ) );

			if( $query->countRows() > 0 )
			{

				$this->id = $query->fetchResult();

				if( $this->_isBanned() )
				{

					return 'You have been banned from the system.';

				}

				$this->_createSession();

			}
			else
			{

				return 'Invalid username or password.';

			}

		}

		private function _createSession()
		{

			global $engine;

			$key = $engine->randomChars( 10 );

			$_SESSION['y__rndKey'] = $key;

			$query = $this->query('SELECT null FROM {prefix}sessions WHERE id = {0, i}', array( $this->id ) );

			session_regenerate_id();

			if( $query->countRows() > 0 )
			{

				$this->query('UPDATE {prefix}sessions SET sessionTimeout = {now} + 500, sessionId = {0}, sessionKey = {1} WHERE userId = {2, i} LIMIT 1;', array( session_id(), $key, $this->id ) );

			}
			else
			{

				$this->query('INSERT INTO {prefix}session VALUES({0}, {1, i},{now} + 500, {2} )', array( session_id(), $this->id, $key ) );

			}

		}

		private function _isBanned()
		{

			$query = $this->query('
									SELECT

										null

									FROM

										{prefix}bans

									WHERE

										userId = {0, i}

									AND

										timeExpire - {now} > 0

									LIMIT 1;
								 ', array( $this->id ) );


			if( $query->countRows() > 0 )
			{

				return true;

			}
			else
			{

				return false;

			}

		}

		private function _checkSessions()
		{

			$query = $this->Query('
									SELECT

										userId, sessionKey

									FROM

										{prefix}sessions

									WHERE

										sessionId = {0}

									AND

										sessionTimeOut + 500 - {now} > 0

									LIMIT 1;

								', array( session_id( ) ) );

			if( $query->countRows() > 0 )
			{

				$data = $query->fetchRow();

				if( $data[ 1 ] == $_SESSION['y__rndKey'] )
				{

					$this->isLoggedIn = true;

					$this->id = $data[ 0 ];

					$this->Query( 'UPDATE {prefix}sessions SET sessionTimeout = {now} + 500 WHERE userId = {0, i} LIMIT 1;', array( $this->id ) );

				}

			}

		}

		private function _grabCache()
		{

			$cacheUrl = BASE . '_cache/_users/' . $this->id . '.cache';

			if( !file_exists( $cacheUrl ) )
			{

				return false;

			}

			$this->cache = unserialize( @file_get_contents( BASE . '_cache/_users/' . $this->id . '.cache' ) );

		}

		private function _generateCache()
		{


			$query = $this->Query('SELECT * FROM {prefix}users WHERE id = {0, i} LIMIT 1;', array( $this->id ) );

			foreach( $query->fetchArray( MYSQL_ASSOC ) as $key => $value )
			{

				if( $key == 'password' ) continue;

				$userCache[ $key ] = $value;

			}

			$userCache = serialize( $userCache );

			file_put_contents( BASE . '_cache/_users/' . $this->id . '.cache', $userCache );


		}


	}