<?php

/**
 * Enter description here...
 *
 * example：
 * <pre>
 *
 * </pre>
 *
 * @name QLib_Paging
 * @version
 * @package
 * @author peter.zyliu peter.zyliu@gmail.com
 * @since 1.0
 */
class YHMUtils_Paging extends Q_Paging
{

    /**
     * 路径
     *
     * @var String
     */
    private $path = '';

    /**
     * 查询参数
     * String or Array
     * @var mixed
     */
    private $query;

    /**
     * 分页集尺寸
     *
     * @var Integer
     */
    private $pageSetSize = 11;

    /**
     * 子串
     *
     * @var String
     */
    private $substring = '?';

    /**
     * 连接符号
     *
     * @var String
     */
    private $sign = '=';

    /**
     * 对符
     *
     * @var String
     */
    private $pairs = '&';

    /**
     * jsName
     * @var String
     */
    private $jsFName = '';

    /**
     * 废弃参数
     * @var String
     */
    private $disuse = null;

    /**
     * 设置分页链接中的关键字
     *
     * @var String
     */
    private $keyword = 'page';

    /**
     * 是否开启rewrite url
     *
     * @var bool
     */
    private $rewrite = false;

    /**
     * 附加参数
     * @var string
     */
    private $appendParam = '';

    /**
     * 分页中代码当前页码的常量
     *
     */
    const PAGER_VARIABLE_STRING = "%{PAGE_NO}";


    /**
     * 新的获取当前偏移
     * @return Integer
     */
    public function getNewCurrent()
    {
        if ($this->currentPage > 1) {
            return min($this->currentPage, $this->getPageNum());
        }
        $pageNo = !isset($_GET[$this->keyword]) ? 0 : (int)(intval($_GET[$this->keyword]) * $this->getSize()) - $this->getSize();
        return (int)($pageNo < 0 ? 0 : $pageNo);
    }

    /**
     * 重载当前页方法
     * @return Integer
     */
    public function getCurrent()
    {
        if ($this->currentPage > 1) {
            return min($this->currentPage, $this->getPageNum());
        }
        $pageNo = isset($_GET[$this->keyword]) ? (int)intval($_GET[$this->keyword]) : 1;
        if ($pageNo <= 0) {
            $pageNo = 1;
        }
        $this->currentPage = min($pageNo, $this->getPageNum());
        return $this->currentPage;
    }

    /**
     * 获取关键词
     * @return String
     */
    public function getKeyword()
    {
        return $this->keyword;
    }

    /**
     * 设置关键词
     *
     * @param String $keyword
     * @return QLib_Paging
     */
    public function setKeyword($keyword)
    {
        if (!empty($keyword)) {
            $this->keyword = $keyword;
        }
        return $this;
    }

    /**
     * 设置js名字
     * @param String $name
     * @return Q_Page_Abstract
     */
    public function setFJs($name)
    {
        if (!empty($name)) {
            $this->jsFName = $name;
        }
        return $this;
    }

    /**
     * 设置附加参数
     * @param string $param
     * @return Q_Page_Abstract
     */
    public function setAppendParam($param)
    {
        $this->appendParam = $param;
        return $this;
    }

    /**
     * 获取附加参数
     * @return string
     */
    public function getAppendParam()
    {
        return $this->appendParam;
    }

    /**
     * 获取分页js名字
     * @return String
     *
     */
    public function getFJs()
    {
        return $this->jsFName;
    }

    /**
     *
     * 设置链接的路径
     *
     * @param String $path
     * @return QLib_Paging
     */
    public function setPath($path)
    {
        if (!empty($path)) {
            $this->path = trim($path);
        }
        return $this;
    }

    /**
     * 设置连续Url
     *
     * @param bool $seo
     * @return QLib_Paging
     */
    public function rewrite($rw = true)
    {
        if ($rw == true) {
            $this->substring = '';
            $this->sign = '/';
            $this->pairs = '/';
            $this->rewrite = true;
        }
        return $this;
    }

    /**
     * 取得程序路径
     * @return String
     */
    public function getPath()
    {
        return $this->path;
    }

    /**
     * 设置分页集尺寸
     *
     * @param integer $num 大于1
     * @return QLib_Paging
     */
    public function setPageSetSize($num)
    {
        $this->pageSetSize = (int)intval($num);
        return $this;
    }

    /**
     * 取得分页集尺寸
     *
     * @return integer
     */
    public function getPageSetSize()
    {
        return (int)$this->pageSetSize;
    }

    /**
     * 获取查询参数
     * @return String
     */
    public function getQuery()
    {
        if (empty($this->query)) {
            $this->query = $this->autoUrl();
        }
        if (is_array($this->query) && count($this->query) > 0) {
            $_query = array();
            foreach ($this->query as $key => $value) {
                if ($key == $this->getKeyword()) {
                    continue;
                }
                if (is_array($value)) {
                    foreach ($value as $k => $val) {
                        $_query[] = "{$key}[]" . $this->sign . $val;
                    }
                } else {
                    $_query[] = "{$key}" . $this->sign . $value;
                }
            }
            $this->query = $this->pairs . implode($this->pairs, $_query);
        }
        return $this->query ? $this->query : '';
    }

    /**
     * 获取URL
     *
     * @param Integer $pageNo
     * @return String
     */
    public function getUrl($pageNo)
    {
        $query = $this->getQuery();
        if (strstr($query, self::PAGER_VARIABLE_STRING) && is_string($query)) {
            $query = str_replace(self::PAGER_VARIABLE_STRING, $pageNo, $query);
        } else {
            if (empty($query)) {
                $query = $this->getKeyword() . $this->sign . $pageNo;
            } else {
                $query = $this->getKeyword() . $this->sign . $pageNo . $query;
            }
        }
        $url = $this->getPath() . $this->substring . $query;
        if ($this->getFJs()) {
            $url = $query;
        }
        return $url;
    }

    /**
     * 设置查询参数
     *
     * @param mixed $query String or Array
     * @return QLib_Paging
     */
    public function setQuery($query)
    {
        $this->query = $query;
        return $this;
    }


    /**
     * 自动组织 URL
     * @return Array
     */
    private function autoUrl()
    {
        $queryOpt = $_SERVER['REQUEST_URI'];
        $queryArg = parse_url($queryOpt);
        $queryOpt = isset($queryArg['query']) ? explode('&', $queryArg['query']) : array();
        $query = array();
        foreach ($queryOpt as $key => $val) {
            $strTmp = explode('=', $val);
            if (count($strTmp) < 2 || empty($strTmp[0]) || $strTmp[1] == '' || $strTmp[0] == $this->getKeyword()) {
                continue;
            }
            if (is_array($this->disuse)) {
                if (in_array($strTmp[1], $this->disuse) || in_array($strTmp[0], $this->disuse)) {
                    continue;
                }
            } else {
                if ($strTmp[1] == $this->disuse || $strTmp[0] == $this->disuse) {
                    continue;
                }
            }
            $query[$strTmp[0]] = $strTmp[1];
        }
        return $query;
    }

    /**
     * set废弃参数
     * @param mixed $disuse
     * @return QLib_Paging
     */
    public function setDisuse($disuse = null)
    {
        $this->disuse = $disuse;
        return $this;
    }
}