<?php
class BS_System_Pagination {

    private 
        $baseUrl,      // URL for pages
        $page = 1,     // current page
        $perPage = 10, // elements per page
        $allElements,  // number of all elements
        $currentCount, // current number of overwent elements
        $allPages;     // number of all pages

    public function 
    __construct($perPage = 10) {
        $this->setPerPage($perPage);
    }


    public function setPage($getParamNum = 0) {

        if (System_Router::getParam($getParamNum) > 0) {
            $this->page = System_Router::getParam($getParamNum);
        }
    }

    public function getPage() {
        return $this->page;
    }


    public function setPerPage($perPage) {
        $this->perPage = (is_integer($perPage)) ? $perPage : 10;
    }
    public function getPerPage() {
        return $this->perPage;
    }

    public function setAllElements($allElements) {
        $this->allElements = (int)$allElements;
    }
    public function getAllElements() {
        return $this->allElements;
    }

    public function getCurrentCount() {
        if (!$this->currentCount) {
            $this->currentCount = ($this->getPage()-1)*$this->getPerPage();
        }
        return $this->currentCount;
    }

    public function getAllPages() {
        if (!$this->allPages) {
            $this->allPages = ceil($this->getAllElements()/$this->getPerPage());
        }
        return $this->allPages;
    }
    
    public function setBaseUrl($baseUrl) {
        $this->baseUrl = $baseUrl;
    }

    public function getBaseUrl() {
        if (!$this->baseUrl) {
            $this->baseUrl = $_SERVER['REQUEST_URI'];
        }
        return $this->baseUrl;
    }
}
?>