EP_WP_Query_Integration::filter_posts_request PHP Method

    public function filter_posts_request($request, $query)
    {
        if (!ep_elasticpress_enabled($query) || apply_filters('ep_skip_query_integration', false, $query)) {
            return $request;
        }
        $query_vars = $query->query_vars;
        /**
         * Allows us to filter in searchable post types if needed
         *
         * @since  2.1
         */
        $query_vars['post_type'] = apply_filters('ep_query_post_type', $query_vars['post_type'], $query);
        if ('any' === $query_vars['post_type']) {
            unset($query_vars['post_type']);
        }
        $new_posts = apply_filters('ep_wp_query_search_cached_posts', array(), $query);
        if (count($new_posts) < 1) {
            $scope = 'current';
            if (!empty($query_vars['sites'])) {
                $scope = $query_vars['sites'];
            }
            $formatted_args = ep_format_args($query_vars);
            /**
             * Filter search scope
             *
             * @since 2.1
             *
             * @param mixed $scope The search scope. Accepts `all` (string), a single
             *                     site id (int or string), or an array of site ids (array).
             */
            $scope = apply_filters('ep_search_scope', $scope);
            $ep_query = ep_query($formatted_args, $query->query_vars, $scope);
            if (false === $ep_query) {
                return $request;
            }
            $query->found_posts = $ep_query['found_posts'];
            $query->max_num_pages = ceil($ep_query['found_posts'] / $query->get('posts_per_page'));
            foreach ($ep_query['posts'] as $post_array) {
                $post = new stdClass();
                $post->ID = $post_array['post_id'];
                $post->site_id = get_current_blog_id();
                if (!empty($post_array['site_id'])) {
                    $post->site_id = $post_array['site_id'];
                }
                // ep_search_request_args
                $post_return_args = apply_filters('ep_search_post_return_args', array('post_type', 'post_author', 'post_name', 'post_status', 'post_title', 'post_parent', 'post_content', 'post_excerpt', 'post_date', 'post_date_gmt', 'post_modified', 'post_modified_gmt', 'post_mime_type', 'comment_count', 'comment_status', 'ping_status', 'menu_order', 'permalink', 'terms', 'post_meta'));
                foreach ($post_return_args as $key) {
                    if ($key === 'post_author') {
                        $post->{$key} = $post_array[$key]['id'];
                    } elseif (isset($post_array[$key])) {
                        $post->{$key} = $post_array[$key];
                    }
                }
                $post->elasticsearch = true;
                // Super useful for debugging
                if ($post) {
                    $new_posts[] = $post;
                }
            }
            do_action('ep_wp_query_non_cached_search', $new_posts, $ep_query, $query);
        }
        $this->posts_by_query[spl_object_hash($query)] = $new_posts;
        do_action('ep_wp_query_search', $new_posts, $ep_query, $query);
        global $wpdb;
        return "SELECT * FROM {$wpdb->posts} WHERE 1=0";
    }