<?php

function smarty_block_list_pager_frendly($params, $content, &$smarty)
{
    $name = 'pager';
    $max_display_pages = 7;
    extract($params);

    if ($content != NULL && !($num_pages < 2) ) {
        $smarty->clear_assign($name);
        return $content;
    }

    if ($num_pages < 2 ){
        return false;
    }


    $max_display_pages = (floor($max_display_pages / 2) * 2)+ 1; // max_display_pages validation

    $delim = (substr($link, -1) == '/') ? '' : '/';

    $pages = array();
    if ($page != 0) {
        $pages['First'] = $link . $delim . "page/0" . $query_string;
        $pages['Prev'] = $link . $delim . "page/" . ($page - 1) . $query_string;
    }

    if (($page + 1) < $num_pages) {
        $pages['Next'] = $link . $delim . "page/" . ($page + 1) . $query_string;
        $pages['Last'] = $link . $delim . "page/" . ($num_pages - 1) . $query_string;
    }
    $pages['pages'] = array();

        if ($num_pages > $max_display_pages) {
            $page_first = $page - floor($max_display_pages / 2);
            $page_last = $page + floor($max_display_pages / 2);
            if ($page_first < 0) {
                $page_last = $page_last - $page_first;
                $page_first = 0;
            }
            if ($page_last >= $num_pages) {
                $page_first = $page_first - ($page_last - $num_pages + 1);
                $page_last = $num_pages - 1;
            }
        } else {
            $page_first = 0;
            $page_last = $num_pages - 1;
        }

    for ($i = $page_first; $i <= $page_last; $i++ ){
        if ($i == $page){
            $pages['pages'][$i + 1] = false;
        }else {
            $pages['pages'][$i + 1] = $link . $delim . "page/{$i}" . $query_string;
        }
    }

    $smarty->assign($name, $pages);
}