<?php

/**
 * Description of A2WL_Paginator
 *
 * @author Andrey
 */
if (!class_exists('A2WL_Paginator')) {

    class A2WL_Paginator {
        public static function build($total, $per_page=20, $links=4, $request_param = 'cur_page'){
            $page = isset($_REQUEST[$request_param]) && intval($_REQUEST[$request_param]) ? intval($_REQUEST[$request_param]) : 1;

            $pages_list = array();
            
            $last = ceil($total / $per_page);
            
            if($page<1){
                $page=1;
            }
            
            if($page>$last){
                $page = $last;
            }
            
            $start = ( ( $page - $links ) > 0 ) ? $page - $links : 1;
            $end = ( ( $page + $links ) < $last ) ? $page + $links : $last;
            if ($start > 1) {
                $pages_list[] = 1;
                $pages_list[] = '';
            }
            for ($i = $start; $i <= $end; $i++) {
                $pages_list[] = $i;
            }
            if ($end < $last) {
                $pages_list[] = '';
                $pages_list[] = $last;
            }
            
            return array('total_pages'=>$last, 'cur_page'=>$page, 'per_page'=>$per_page, 'pages_list'=>$pages_list);
        }
    }
}