<?php
require_once( dirname(__FILE__).'/icwp-data-processor.php' );

if ( !class_exists('ICWP_WPTB_WpFunctions_V4') ):

	class ICWP_WPTB_WpFunctions_V4 {

		/**
		 * @var ICWP_WPTB_WpFunctions_V4
		 */
		protected static $oInstance = NULL;

		/**
		 * @return ICWP_WPTB_WpFunctions_V4
		 */
		public static function GetInstance() {
			if ( is_null( self::$oInstance ) ) {
				self::$oInstance = new self();
			}
			return self::$oInstance;
		}

		/**
		 * @var string
		 */
		protected $m_sWpVersion;

		/**
		 * @var boolean
		 */
		protected $fIsMultisite;

		public function __construct() {}

		/**
		 * @param string $sPluginFile
		 * @return boolean|stdClass
		 */
		public function getIsPluginUpdateAvailable( $sPluginFile ) {
			$aUpdates = $this->getWordpressUpdates();
			if ( empty( $aUpdates ) ) {
				return false;
			}
			if ( isset( $aUpdates[ $sPluginFile ] ) ) {
				return $aUpdates[ $sPluginFile ];
			}
			return false;
		}

		/**
		 * @param $sPluginFile
		 * @return mixed
		 */
		public function getPluginUpgradeLink( $sPluginFile ) {
			$sUrl = self_admin_url( 'update.php' ) ;
			$aQueryArgs = array(
				'action' 	=> 'upgrade-plugin',
				'plugin'	=> urlencode( $sPluginFile ),
				'_wpnonce'	=> wp_create_nonce( 'upgrade-plugin_' . $sPluginFile )
			);
			return add_query_arg( $aQueryArgs, $sUrl );
		}

		/**
		 * @return array
		 */
		public function getWordpressUpdates() {
			$oCurrent = $this->getTransient( 'update_plugins' );
			return ( is_object( $oCurrent ) && isset( $oCurrent->response ) ) ? $oCurrent->response : array();
		}

		/**
		 * The full plugin file to be upgraded.
		 *
		 * @param string $sPluginFile
		 * @return boolean
		 */
		public function doPluginUpgrade( $sPluginFile ) {

			if ( !$this->getIsPluginUpdateAvailable( $sPluginFile )
				|| ( isset( $GLOBALS['pagenow'] ) && $GLOBALS['pagenow'] == 'update.php' ) ) {
				return true;
			}
			$sUrl = $this->getPluginUpgradeLink( $sPluginFile );
			wp_redirect( $sUrl );
			exit();
		}

		/**
		 * @param string $sKey
		 * @return object
		 */
		protected function getTransient( $sKey ) {

			// TODO: Handle multisite

			if ( version_compare( $this->getWordpressVersion(), '2.7.9', '<=' ) ) {
				return get_option( $sKey );
			}

			if ( function_exists( 'get_site_transient' ) ) {
				$mResult = get_site_transient( $sKey );
				if ( empty( $mResult ) ) {
					remove_all_filters( 'pre_site_transient_'.$sKey );
					$mResult = get_site_transient( $sKey );
				}
				return $mResult;
			}

			if ( version_compare( $this->getWordpressVersion(), '2.9.9', '<=' ) ) {
				return apply_filters( 'transient_'.$sKey, get_option( '_transient_'.$sKey ) );
			}

			return apply_filters( 'site_transient_'.$sKey, get_option( '_site_transient_'.$sKey ) );
		}

		/**
		 * @return string
		 */
		public function getWordpressVersion() {
			global $wp_version;

			if ( empty( $this->m_sWpVersion ) ) {
				$sVersionFile = ABSPATH.WPINC.'/version.php';
				$sVersionContents = file_get_contents( $sVersionFile );

				if ( preg_match( '/wp_version\s=\s\'([^(\'|")]+)\'/i', $sVersionContents, $aMatches ) ) {
					$this->m_sWpVersion = $aMatches[1];
				}
			}
			return empty( $this->m_sWpVersion )? $wp_version : $this->m_sWpVersion;
		}

		/**
		 * @param array $aQueryParams
		 */
		public function redirectToLogin( $aQueryParams = array() ) {
			$sLoginUrl = site_url() . '/wp-login.php';
			$this->doRedirect( $sLoginUrl, $aQueryParams );
			exit();
		}
		/**
		 * @param $aQueryParams
		 */
		public function redirectToAdmin( $aQueryParams = array() ) {
			$this->doRedirect( is_multisite()? get_admin_url() : admin_url(), $aQueryParams );
		}
		/**
		 * @param $aQueryParams
		 */
		public function redirectToHome( $aQueryParams = array() ) {
			$this->doRedirect( home_url(), $aQueryParams );
		}

		/**
		 * @param $sUrl
		 * @param $aQueryParams
		 */
		public function doRedirect( $sUrl, $aQueryParams = array() ) {
			$sUrl = empty( $aQueryParams ) ? $sUrl : add_query_arg( $aQueryParams, $sUrl ) ;
			wp_safe_redirect( $sUrl );
			exit();
		}

		/**
		 * @return string
		 */
		public function getCurrentPage() {
			global $pagenow;
			return $pagenow;
		}

		/**
		 * @param string
		 * @return string
		 */
		public function getIsCurrentPage( $sPage ) {
			return $sPage == $this->getCurrentPage();
		}

		/**
		 * @return bool
		 */
		public function getIsLoginRequest() {
			$oDp = $this->loadDataProcessor();
			return
				$oDp->GetIsRequestPost()
				&& $this->getIsCurrentPage( 'wp-login.php' )
				&& !is_null( $oDp->FetchPost( 'log' ) )
				&& !is_null( $oDp->FetchPost( 'pwd' ) );
		}

		/**
		 * @return string
		 */
		public function getSiteName() {
			return function_exists( 'get_bloginfo' )? get_bloginfo('name') : 'WordPress Site';
		}
		/**
		 * @return string
		 */
		public function getSiteAdminEmail() {
			return function_exists( 'get_bloginfo' )? get_bloginfo('admin_email') : '';
		}

		/**
		 * @return boolean
		 */
		public function getIsAjax() {
			return defined( 'DOING_AJAX' ) && DOING_AJAX;
		}

		/**
		 * @param string $sRedirectUrl
		 */
		public function logoutUser( $sRedirectUrl = '' ) {
			empty( $sRedirectUrl ) ? wp_logout() : wp_logout_url( $sRedirectUrl );
		}

		/**
		 * @return bool
		 */
		public function isMultisite() {
			if ( !isset( $this->fIsMultisite ) ) {
				$this->fIsMultisite = function_exists( 'is_multisite' ) && is_multisite();
			}
			return $this->fIsMultisite;
		}

		/**
		 * @param string $sKey
		 * @param $sValue
		 * @return mixed
		 */
		public function addOption( $sKey, $sValue ) {
			return $this->isMultisite() ? add_site_option( $sKey, $sValue ) : add_option( $sKey, $sValue );
		}

		/**
		 * @param string $sKey
		 * @param $sValue
		 * @return mixed
		 */
		public function updateOption( $sKey, $sValue ) {
			return $this->isMultisite() ? update_site_option( $sKey, $sValue ) : update_option( $sKey, $sValue );
		}

		/**
		 * @param string $sKey
		 * @param mixed $mDefault
		 * @return mixed
		 */
		public function getOption( $sKey, $mDefault = false ) {
			return $this->isMultisite() ? get_site_option( $sKey, $mDefault ) : get_option( $sKey, $mDefault );
		}

		/**
		 * @param string $sKey
		 * @return mixed
		 */
		public function deleteOption( $sKey ) {
			return $this->isMultisite() ? delete_site_option( $sKey ) : delete_option( $sKey );
		}

		/**
		 * @return string
		 */
		public function getCurrentWpAdminPage() {

			$oDp = $this->loadDataProcessor();
			$sScript = $oDp->FetchServer( 'SCRIPT_NAME' );
			if ( empty( $sScript ) ) {
				$sScript = $oDp->FetchServer( 'PHP_SELF' );
			}
			if ( is_admin() && !empty( $sScript ) && basename( $sScript ) == 'admin.php' ) {
				$sCurrentPage = $oDp->FetchGet( 'page' );
			}
			return empty( $sCurrentPage ) ? '' : $sCurrentPage;
		}

		/**
		 * @return null|WP_User
		 */
		public function getCurrentWpUser() {
			if ( is_user_logged_in() ) {
				$oUser = wp_get_current_user();
				if ( is_object( $oUser ) && $oUser instanceof WP_User ) {
					return $oUser;
				}
			}
			return null;
		}

		/**
		 * @param $sUsername
		 */
		public function setUserLoggedIn( $sUsername ) {
			$oUser = version_compare( $this->getWordpressVersion(), '2.8.0', '<' )? get_userdatabylogin( $sUsername ) : get_user_by( 'login', $sUsername );

			wp_clear_auth_cookie();
			wp_set_current_user ( $oUser->ID, $oUser->user_login );
			wp_set_auth_cookie  ( $oUser->ID, true );
			do_action( 'wp_login', $oUser->user_login, $oUser );
		}

		/**
		 * @return ICWP_WPTB_DataProcessor
		 */
		public function loadDataProcessor() {
			if ( !class_exists('ICWP_WPTB_DataProcessor') ) {
				require_once( dirname(__FILE__).'/icwp-data-processor.php' );
			}
			return ICWP_WPTB_DataProcessor::GetInstance();
		}
	}
endif;


if ( !class_exists('ICWP_WPTB_WpFunctions') ):

	class ICWP_WPTB_WpFunctions extends ICWP_WPTB_WpFunctions_V4 {
		/**
		 * @return ICWP_WPTB_WpFunctions
		 */
		public static function GetInstance() {
			if ( is_null( self::$oInstance ) ) {
				self::$oInstance = new self();
			}
			return self::$oInstance;
		}
	}
endif;