<?php

/**
 * Simple System Info
 *
 * @package     Simple System Info
 * @author      Daniel J Griffiths
 * @since       1.0.0
 */

// Exit if accessed directly
if (!defined('ABSPATH')) {
    exit;
}

// We need to make sure plugin.php is loaded!
require_once ABSPATH . 'wp-admin/includes/plugin.php';

if (!class_exists('Simple_System_Info')) {

    /**
     * Main System Info class
     *
     * @author      Daniel J Griffiths
     * @since       1.0.0
     */
    class Simple_System_Info {

        /**
         * Get system info
         *
         * Returns the system info for a WordPress instance
         *
         * @access      public
         * @author      Daniel J Griffiths
         * @since       1.0.0
         * @global      $wpdb
         * @global      object $wpdb Used to query the database
         * @param       bool $show_inactive Whether or not to show inactive plugins
         * @param       string $id The ID to assign to the returned textarea (Default: system-info-box)
         * @param       string $class The class to assign to the returned textarea (Default: none)
         * @return      string $return A string containing all system info
         */
        public function get($show_inactive = false, $id = 'system-info-box', $class = null) {
            global $wpdb;

            if (!defined('SSINFO_VERSION'))
                define('SSINFO_VERSION', '1.0.0');

            // We need the Browser class!
            if (!class_exists('Browser'))
                require_once 'browser.php';

            $browser = new Browser();

            // Get theme info for this WordPress version
            $theme_data = wp_get_theme();
            $theme = $theme_data->Name . ' ' . $theme_data->Version;

            $return = '<textarea readonly="readonly" onclick="this.focus(); this.select()" id="' . $id . '"' . ( $class != null ? ' class="' . $class . '"' : '' ) . ' title="To copy the system info, click below and press Ctrl+C (PC) or Cmd+C (Mac).">';

            $return .= '### Begin System Info ###' . "\n\n";

            do_action('simple_system_info_before');

            // Start with the basice...
            $return .= '-- Site Info' . "\n\n";
            $return .= 'Site URL:                 ' . site_url() . "\n";
            $return .= 'Home URL:                 ' . home_url() . "\n";
            $return .= 'Multisite:                ' . ( is_multisite() ? 'Yes' : 'No' ) . "\n";

            if (has_filter('ssi_after_site_info'))
                $return .= apply_filters('ssi_after_site_info', $return);

            // The local users' browser information, handled by the Browser class
            $return .= "\n" . '-- User Browser' . "\n\n";
            $return .= $browser;

            if (has_filter('ssi_after_user_browser'))
                $return .= apply_filters('ssi_after_user_browser', $return);

            // WordPress configuration
            $return .= "\n" . '-- WordPress Configuration' . "\n\n";
            $return .= 'Version:                  ' . get_bloginfo('version') . "\n";
            $return .= 'Permalink Structure:      ' . ( get_option('permalink_structure') ? get_option('permalink_structure') : 'Default' ) . "\n";
            $return .= 'Active Theme:             ' . $theme . "\n";
            $return .= 'Show On Front:            ' . get_option('show_on_front') . "\n";

            // Only show page specs if frontpage is set to 'page'
            if (get_option('show_on_front') == 'page') {
                $front_page_id = get_option('page_on_front');
                $blog_page_id = get_option('page_for_posts');

                $return .= 'Page On Front:            ' . ( $front_page_id != 0 ? get_the_title($front_page_id) . ' (#' . $front_page_id . ')' : 'Unset' ) . "\n";
                $return .= 'Page For Posts:           ' . ( $blog_page_id != 0 ? get_the_title($blog_page_id) . ' (#' . $blog_page_id . ')' : 'Unset' ) . "\n";
            }

            // Make sure wp_remote_post() is working
            $request['cmd'] = '_notify-validate';

            $params = array(
                'sslverify' => false,
                'timeout' => 60,
                'user-agent' => 'SSInfo/' . SSINFO_VERSION,
                'body' => $request
            );

            $response = wp_remote_post('https://www.paypal.com/cgi-bin/webscr', $params);

            if (!is_wp_error($response) && $response['response']['code'] >= 200 && $response['response']['code'] < 300) {
                $WP_REMOTE_POST = 'wp_remote_post() works';
            } else {
                $WP_REMOTE_POST = 'wp_remote_post() does not work';
            }

            $return .= 'Remote Post:              ' . $WP_REMOTE_POST . "\n";
            $return .= 'Table Prefix:             ' . 'Length: ' . strlen($wpdb->prefix) . '   Status: ' . ( strlen($wpdb->prefix) > 16 ? 'ERROR: Too long' : 'Acceptable' ) . "\n";
            $return .= 'WP_DEBUG:                 ' . ( defined('WP_DEBUG') ? WP_DEBUG ? 'Enabled' : 'Disabled' : 'Not set' ) . "\n";
            $return .= 'Memory Limit:             ' . WP_MEMORY_LIMIT . "\n";

            if (has_filter('ssi_after_wordpress_config'))
                $return .= apply_filters('ssi_after_wordpress_config', $return);

            // WordPress active plugins
            $return .= "\n" . '-- WordPress Active Plugins' . "\n\n";

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

            foreach ($plugins as $plugin_path => $plugin) {
                if (!in_array($plugin_path, $active_plugins))
                    continue;

                //if( $plugin['Name'] !== 'Redux Framework' ) continue;

                $return .= $plugin['Name'] . ': ' . $plugin['Version'] . "\n";
            }

            if (has_filter('ssi_after_wordpress_plugins'))
                $return .= apply_filters('ssi_after_wordpress_plugins', $return);

            // WordPress inactive plugins
            if ($show_inactive == true) {
                $return .= "\n" . '-- WordPress Inactive Plugins' . "\n\n";

                foreach ($plugins as $plugin_path => $plugin) {
                    if (in_array($plugin_path, $active_plugins))
                        continue;

                    $return .= $plugin['Name'] . ': ' . $plugin['Version'] . "\n";
                }
            }

            if (has_filter('ssi_after_wordpress_plugins_inactive'))
                $return .= apply_filters('ssi_after_wordpress_plugins_inactive', $return);

            // WordPress Multisite active plugins
            if (is_multisite()) {
                $return .= "\n" . '-- Network Active Plugins' . "\n\n";

                $plugins = wp_get_active_network_plugins();
                $active_plugins = get_site_option('active_sitewide_plugins', array());

                foreach ($plugins as $plugin_path) {
                    $plugin_base = plugin_basename($plugin_path);

                    if (!array_key_exists($plugin_base, $active_plugins))
                        continue;

                    $return .= $plugin['Name'] . ': ' . $plugin['Version'] . "\n";
                }

                if (has_filter('ssi_after_wordpress_ms_plugins'))
                    $return .= apply_filters('ssi_after_wordpress_ms_plugins', $return);

                // WordPress Multisite inactive plugins
                if ($show_inactive == true) {
                    $return .= "\n" . '-- Network Inactive Plugins' . "\n\n";

                    foreach ($plugins as $plugin_path) {
                        $plugin_base = plugin_basename($plugin_path);

                        if (array_key_exists($plugin_base, $active_plugins))
                            continue;

                        $return .= $plugin['Name'] . ': ' . $plugin['Version'] . "\n";
                    }
                }
            }

            if (has_filter('ssi_after_wordpress_ms_plugins_inactive'))
                $return .= apply_filters('ssi_after_wordpress_ms_plugins_inactive', $return);

            // Server configuration (really just versioning)
            $return .= "\n" . '-- Webserver Configuration' . "\n\n";
            $return .= 'PHP Version:              ' . PHP_VERSION . "\n";
            $return .= 'MySQL Version:            ' . mysqli_get_client_version() . "\n";
            $return .= 'Webserver Info:           ' . $_SERVER['SERVER_SOFTWARE'] . "\n";

            if (has_filter('ssi_after_webserver_config'))
                $return .= apply_filters('ssi_after_webserver_config', $return);

            // PHP configs... now we're getting to the important stuff
            $return .= "\n" . '-- PHP Configuration' . "\n\n";
            $return .= 'Safe Mode:                ' . ( ini_get('safe_mode') ? 'Yes' : 'No' ) . "\n";
            $return .= 'Memory Limit:             ' . ini_get('memory_limit') . "\n";
            $return .= 'Upload Max Size:          ' . ini_get('upload_max_filesize') . "\n";
            $return .= 'Post Max Size:            ' . ini_get('post_max_size') . "\n";
            $return .= 'Upload Max Filesize:      ' . ini_get('upload_max_filesize') . "\n";
            $return .= 'Time Limit:               ' . ini_get('max_execution_time') . "\n";
            $return .= 'Max Input Vars:           ' . ini_get('max_input_vars') . "\n";
            $return .= 'Display Errors:           ' . ( ini_get('display_errors') ? 'On (' . ini_get('display_errors') . ')' : 'N/A' ) . "\n";

            if (has_filter('ssi_after_php_config'))
                $return .= apply_filters('ssi_after_php_config', $return);

            // PHP extensions and such
            $return .= "\n" . '-- PHP Extensions' . "\n\n";
            $return .= 'cURL:                     ' . ( function_exists('curl_init') ? 'Supported' : 'Not Supported' ) . "\n";
            $return .= 'fsockopen:                ' . ( function_exists('fsockopen') ? 'Supported' : 'Not Supported' ) . "\n";
            $return .= 'SOAP Client:              ' . ( class_exists('SoapClient') ? 'Installed' : 'Not Installed' ) . "\n";
            $return .= 'Suhosin:                  ' . ( extension_loaded('suhosin') ? 'Installed' : 'Not Installed' ) . "\n";

            if (has_filter('ssi_after_php_ext'))
                $return .= apply_filters('ssi_after_php_ext', $return);

            // Session stuff
            $return .= "\n" . '-- Session Configuration' . "\n\n";
            $return .= 'Session:                  ' . ( isset($_SESSION) ? 'Enabled' : 'Disabled' ) . "\n";

            // The rest of this is only relevant is session is enabled
            if (isset($_SESSION)) {
                $return .= 'Session Name:             ' . esc_html(ini_get('session.name')) . "\n";
                $return .= 'Cookie Path:              ' . esc_html(ini_get('session.cookie_path')) . "\n";
                $return .= 'Save Path:                ' . esc_html(ini_get('session.save_path')) . "\n";
                $return .= 'Use Cookies:              ' . ( ini_get('session.use_cookies') ? 'On' : 'Off' ) . "\n";
                $return .= 'Use Only Cookies:         ' . ( ini_get('session.use_only_cookies') ? 'On' : 'Off' ) . "\n";
            }

            if (has_filter('ssi_after_session_config'))
                $return .= apply_filters('ssi_after_session_config', $return);

            do_action('ssi_after');

            $return .= "\n" . '### End System Info ###';

            $return .= '</textarea>';

            return $return;
        }
    }
}
