<?php

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/**

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* IMPORTANT:

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* This file will be loaded based on the order of the plugins/themes load.

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* If there's a theme and a plugin using Freemius, the plugin's essential

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* file will always load first.

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*

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* @package Freemius

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* @copyright Copyright (c) 2015, Freemius, Inc.

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* @license https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3

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* @since 1.1.5

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*/

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if ( ! function_exists( 'fs_normalize_path' ) ) {

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if ( function_exists( 'wp_normalize_path' ) ) {

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/**

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* Normalize a filesystem path.

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*

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* Replaces backslashes with forward slashes for Windows systems, and ensures

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* no duplicate slashes exist.

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*

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* @param string $path Path to normalize.

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*

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* @return string Normalized path.

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*/

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function fs_normalize_path( $path ) {

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return wp_normalize_path( $path );

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}

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} else {

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function fs_normalize_path( $path ) {

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$path = str_replace( '\\', '/', $path );

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$path = preg_replace( '|/+|', '/', $path );

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return $path;

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}

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}

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}

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require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-2.2.1.php';

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#region Core Redirect (copied from BuddyPress) -----------------------------------------

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if ( ! function_exists( 'fs_redirect' ) ) {

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/**

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* Redirects to another page, with a workaround for the IIS Set-Cookie bug.

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*

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* @link http://support.microsoft.com/kb/q176113/

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* @since 1.5.1

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* @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.

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*

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* @param string $location The path to redirect to.

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* @param bool $exit If true, exit after redirect (Since 1.2.1.5).

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* @param int $status Status code to use.

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*

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* @return bool False if $location is not set

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*/

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function fs_redirect( $location, $exit = true, $status = 302 ) {

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global $is_IIS;

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$file = '';

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$line = '';

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if ( headers_sent($file, $line) ) {

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if ( WP_FS__DEBUG_SDK && class_exists( 'FS_Admin_Notices' ) ) {

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$notices = FS_Admin_Notices::instance( 'global' );

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$notices->add( "Freemius failed to redirect the page because the headers have been already sent from line <b><code>{$line}</code></b> in file <b><code>{$file}</code></b>. If it's unexpected, it usually happens due to invalid space and/or EOL character(s).", 'Oops...', 'error' );

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}

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return false;

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}

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if ( defined( 'DOING_AJAX' ) ) {

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// Don't redirect on AJAX calls.

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return false;

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}

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if ( ! $location ) // allows the wp_redirect filter to cancel a redirect

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{

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return false;

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}

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$location = fs_sanitize_redirect( $location );

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if ( $is_IIS ) {

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header( "Refresh: 0;url=$location" );

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} else {

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if ( php_sapi_name() != 'cgi-fcgi' ) {

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status_header( $status );

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} // This causes problems on IIS and some FastCGI setups

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header( "Location: $location" );

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}

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if ( $exit ) {

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exit();

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}

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return true;

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}

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if ( ! function_exists( 'fs_sanitize_redirect' ) ) {

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/**

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* Sanitizes a URL for use in a redirect.

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*

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* @since 2.3

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*

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* @param string $location

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*

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* @return string redirect-sanitized URL

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*/

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function fs_sanitize_redirect( $location ) {

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$location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!]|i', '', $location );

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$location = fs_kses_no_null( $location );

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// remove %0d and %0a from location

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$strip = array( '%0d', '%0a' );

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$found = true;

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while ( $found ) {

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$found = false;

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foreach ( (array) $strip as $val ) {

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while ( strpos( $location, $val ) !== false ) {

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$found = true;

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$location = str_replace( $val, '', $location );

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}

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}

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}

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return $location;

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}

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}

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if ( ! function_exists( 'fs_kses_no_null' ) ) {

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/**

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* Removes any NULL characters in $string.

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*

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* @since 1.0.0

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*

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* @param string $string

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*

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* @return string

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*/

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function fs_kses_no_null( $string ) {

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$string = preg_replace( '/\0+/', '', $string );

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$string = preg_replace( '/(\\\\0)+/', '', $string );

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return $string;

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}

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}

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}

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#endregion Core Redirect (copied from BuddyPress) -----------------------------------------

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if ( ! function_exists( 'fs_get_ip' ) ) {

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/**

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* Get server IP.

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*

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* @since 2.5.1 This method returns the server IP.

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*

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* @author Vova Feldman (@svovaf)

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* @since 1.1.2

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*

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* @return string|null

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*/

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function fs_get_ip() {

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return empty( $_SERVER[ 'SERVER_ADDR' ] ) ?

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null :

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$_SERVER[ 'SERVER_ADDR' ];

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}

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}

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if ( ! function_exists( 'fs_find_caller_plugin_file' ) ) {

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/**

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* Leverage backtrace to find caller plugin main file path.

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*

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* @author Vova Feldman (@svovaf)

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* @since 1.0.6

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*

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* @return string

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*/

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function fs_find_caller_plugin_file() {

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/**

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* All the code below will be executed once on activation.

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* If the user changes the main plugin's file name, the file_exists()

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* will catch it.

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*/

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if ( ! function_exists( 'get_plugins' ) ) {

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require_once ABSPATH . 'wp-admin/includes/plugin.php';

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}

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$all_plugins = fs_get_plugins( true );

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$all_plugins_paths = array();

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// Get active plugin's main files real full names (might be symlinks).

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foreach ( $all_plugins as $relative_path => $data ) {

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$all_plugins_paths[] = fs_normalize_path( realpath( WP_PLUGIN_DIR . '/' . $relative_path ) );

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}

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$plugin_file = null;

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for ( $i = 1, $bt = debug_backtrace(), $len = count( $bt ); $i < $len; $i ++ ) {

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if ( empty( $bt[ $i ]['file'] ) ) {

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continue;

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}

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if ( in_array( fs_normalize_path( $bt[ $i ]['file'] ), $all_plugins_paths ) ) {

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$plugin_file = $bt[ $i ]['file'];

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break;

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}

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}

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if ( is_null( $plugin_file ) ) {

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// Throw an error to the developer in case of some edge case dev environment.

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wp_die(

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'Freemius SDK couldn\'t find the plugin\'s main file. Please contact sdk@freemius.com with the current error.',

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'Error',

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array( 'back_link' => true )

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);

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}

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return $plugin_file;

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}

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}

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require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-1.1.7.1.php';

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if ( ! function_exists( 'fs_update_sdk_newest_version' ) ) {

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/**

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* Update SDK newest version reference.

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*

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* @author Vova Feldman (@svovaf)

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* @since 1.1.6

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*

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* @param string $sdk_relative_path

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* @param string|bool $plugin_file

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*

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* @global $fs_active_plugins

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*/

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function fs_update_sdk_newest_version( $sdk_relative_path, $plugin_file = false ) {

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/**

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* If there is a plugin running an older version of FS (1.2.1 or below), the `fs_update_sdk_newest_version()`

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* function in the older version will be used instead of this one. But since the older version is using

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* the `is_plugin_active` function to check if a plugin is active, passing the theme's `plugin_path` to the

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* `is_plugin_active` function will return false since the path is not a plugin path, so `in_activation` will be

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* `true` for theme modules and the upgrading of the SDK version to 1.2.2 or newer version will work fine.

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*

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* Future versions that will call this function will use the proper logic here instead of just relying on the

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* `is_plugin_active` function to fail for themes.

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*

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* @author Leo Fajardo (@leorw)

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* @since 1.2.2

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*/

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global $fs_active_plugins;

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$newest_sdk = $fs_active_plugins->plugins[ $sdk_relative_path ];

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if ( ! is_string( $plugin_file ) ) {

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$plugin_file = plugin_basename( fs_find_caller_plugin_file() );

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}

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if ( ! isset( $newest_sdk->type ) || 'theme' !== $newest_sdk->type ) {

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if ( ! function_exists( 'is_plugin_active' ) ) {

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require_once ABSPATH . 'wp-admin/includes/plugin.php';

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}

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$in_activation = ( ! is_plugin_active( $plugin_file ) );

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} else {

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$theme = wp_get_theme();

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$in_activation = ( $newest_sdk->plugin_path == $theme->stylesheet );

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}

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$fs_active_plugins->newest = (object) array(

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'plugin_path' => $plugin_file,

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'sdk_path' => $sdk_relative_path,

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'version' => $newest_sdk->version,

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'in_activation' => $in_activation,

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'timestamp' => time(),

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);

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// Update DB with latest SDK version and path.

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update_option( 'fs_active_plugins', $fs_active_plugins );

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}

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}

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if ( ! function_exists( 'fs_newest_sdk_plugin_first' ) ) {

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/**

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* Reorder the plugins load order so the plugin with the newest Freemius SDK is loaded first.

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*

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* @author Vova Feldman (@svovaf)

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* @since 1.1.6

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*

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* @return bool Was plugin order changed. Return false if plugin was loaded first anyways.

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*

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* @global $fs_active_plugins

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*/

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function fs_newest_sdk_plugin_first() {

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global $fs_active_plugins;

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/**

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* @todo Multi-site network activated plugin are always loaded prior to site plugins so if there's a plugin activated in the network mode that has an older version of the SDK of another plugin which is site activated that has new SDK version, the fs-essential-functions.php will be loaded from the older SDK. Same thing about MU plugins (loaded even before network activated plugins).

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*

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* @link https://github.com/Freemius/wordpress-sdk/issues/26

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*/

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$newest_sdk_plugin_path = $fs_active_plugins->newest->plugin_path;

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$active_plugins = get_option( 'active_plugins', array() );

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$updated_active_plugins = array( $newest_sdk_plugin_path );

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$plugin_found = false;

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$is_first_path = true;

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foreach ( $active_plugins as $key => $plugin_path ) {

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if ( $plugin_path === $newest_sdk_plugin_path ) {

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if ( $is_first_path ) {

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// if it's the first plugin already, no need to continue

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return false;

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}

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$plugin_found = true;

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// Skip the plugin (it is already added as the 1st item of $updated_active_plugins).

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continue;

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}

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$updated_active_plugins[] = $plugin_path;

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if ( $is_first_path ) {

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$is_first_path = false;

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}

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}

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if ( $plugin_found ) {

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update_option( 'active_plugins', $updated_active_plugins );

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return true;

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}

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if ( is_multisite() ) {

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// Plugin is network active.

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$network_active_plugins = get_site_option( 'active_sitewide_plugins', array() );

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if ( isset( $network_active_plugins[ $newest_sdk_plugin_path ] ) ) {

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reset( $network_active_plugins );

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if ( $newest_sdk_plugin_path === key( $network_active_plugins ) ) {

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// Plugin is already activated first on the network level.

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return false;

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} else {

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$time = $network_active_plugins[ $newest_sdk_plugin_path ];

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// Remove plugin from its current position.

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unset( $network_active_plugins[ $newest_sdk_plugin_path ] );

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// Set it to be included first.

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$network_active_plugins = array( $newest_sdk_plugin_path => $time ) + $network_active_plugins;

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update_site_option( 'active_sitewide_plugins', $network_active_plugins );

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return true;

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}

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}

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}

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return false;

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}

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}

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if ( ! function_exists( 'fs_fallback_to_newest_active_sdk' ) ) {

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/**

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* Go over all Freemius SDKs in the system and find and "remember"

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* the newest SDK which is associated with an active plugin.

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*

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* @author Vova Feldman (@svovaf)

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* @since 1.1.6

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*

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* @global $fs_active_plugins

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*/

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function fs_fallback_to_newest_active_sdk() {

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global $fs_active_plugins;

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/**

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* @var object $newest_sdk_data

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*/

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$newest_sdk_data = null;

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$newest_sdk_path = null;

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foreach ( $fs_active_plugins->plugins as $sdk_relative_path => $data ) {

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if ( is_null( $newest_sdk_data ) || version_compare( $data->version, $newest_sdk_data->version, '>' )

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) {

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// If plugin inactive or SDK starter file doesn't exist, remove SDK reference.

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if ( 'plugin' === $data->type ) {

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$is_module_active = is_plugin_active( $data->plugin_path );

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} else {

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$active_theme = wp_get_theme();

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$is_module_active = ( $data->plugin_path === $active_theme->get_template() );

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}

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$is_sdk_exists = file_exists( fs_normalize_path( WP_PLUGIN_DIR . '/' . $sdk_relative_path . '/start.php' ) );

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if ( ! $is_module_active || ! $is_sdk_exists ) {

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unset( $fs_active_plugins->plugins[ $sdk_relative_path ] );

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// No need to store the data since it will be stored in fs_update_sdk_newest_version()

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// or explicitly with update_option().

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} else {

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$newest_sdk_data = $data;

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$newest_sdk_path = $sdk_relative_path;

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}

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}

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}

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if ( is_null( $newest_sdk_data ) ) {

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// Couldn't find any SDK reference.

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$fs_active_plugins = new stdClass();

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update_option( 'fs_active_plugins', $fs_active_plugins );

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} else {

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fs_update_sdk_newest_version( $newest_sdk_path, $newest_sdk_data->plugin_path );

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}

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}

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}

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