<?php
/**
 * 模板驱动
 *
 * 模板驱动，商城模板引擎
 *
 *
 * @package    tpl
 */
defined('InShopNC') or exit('Access Invalid!');

class Tpl
{
    /**
     * 单件对象
     */
    private static $instance = null;
    /**
     * 输出模板内容的数组，其他的变量不允许从程序中直接输出到模板
     */
    private static $output_value = array();
    /**
     * 模板路径设置
     */
    private static $tpl_dir = '';
    /**
     * 默认layout
     */
    private static $layout_file = 'layout';

    private function __construct()
    {
    }

    /**
     * 实例化
     *
     * @return obj
     */
    public static function getInstance()
    {
        if (self::$instance === null || !(self::$instance instanceof Tpl)) {
            self::$instance = new Tpl();
        }
        return self::$instance;
    }

    /**
     * 设置模板目录
     *
     * @param string $dir
     * @return bool
     */
    public static function setDir($dir)
    {
        self::$tpl_dir = $dir;
        return true;
    }

    /**
     * 设置布局
     *
     * @param string $layout
     * @return bool
     */
    public static function setLayout($layout)
    {
        self::$layout_file = $layout;
        return true;
    }

    /**
     * 抛出变量
     *
     * @param mixed $output
     * @param  void
     */
    public static function output($output, $input = '')
    {
        self::getInstance();
        self::$output_value[$output] = $input;
    }

    public static function clear()
    {
        self::getInstance();
        self::$output_value = array();
    }

    /**
     * 调用显示模板
     *
     * @param string $page_name
     * @param string $layout
     * @param int $time
     */
    public static function showpage($page_name = '', $layout = '', $time = 2000)
    {
        if (!defined('TPL_NAME')) define('TPL_NAME', 'default');
        self::getInstance();
        if (!empty(self::$tpl_dir)) {
            $tpl_dir = self::$tpl_dir . DS;
        }

        //默认是带有布局文件
        if (empty($layout)) {
            $layout = 'layout' . DS . self::$layout_file . '.php';
        } else {
            $layout = 'layout' . DS . $layout . '.php';
        }

        $layout_file = BASE_PATH . '/templates/' . TPL_NAME . DS . $layout;
        $tpl_file = BASE_PATH . '/templates/' . TPL_NAME . DS . $tpl_dir . $page_name . '.php';
        if (file_exists($tpl_file))
        {
            //对模板变量进行赋值
            $output = self::$output_value;
            //页头
            $output['html_title'] = $output['html_title'] != '' ? $output['html_title'] : $GLOBALS['setting_config']['site_name'];
            $output['seo_keywords'] = $output['seo_keywords'] != '' ? $output['seo_keywords'] : $GLOBALS['setting_config']['site_name'];
            $output['seo_description'] = $output['seo_description'] != '' ? $output['seo_description'] : $GLOBALS['setting_config']['site_name'];
            $output['ref_url'] = getReferer();

            Language::read('common');
            $lang = Language::getLangContent();

            @header("Content-type: text/html; charset=" . CHARSET);
            //判断是否使用布局方式输出模板，如果是，那么包含布局文件，并且在布局文件中包含模板文件
            if ($layout != '')
            {
                if (file_exists($layout_file)) {
                    include($layout_file);
                } else {
                    $error = 'Tpl ERROR:' . 'templates' . DS . $layout . ' is not exists';
                    throw_exception($error);
                }
            } else {
                include_once($tpl_file);
            }
        } else {
            $error = 'Tpl ERROR:' . 'templates' . DS . $tpl_dir . $page_name . '.php' . ' is not exists';
            throw_exception($error);
        }
    }

    /**
     * 显示页面Trace信息
     *
     * @return array
     */
    public static function showTrace()
    {
        $trace = array();
        //当前页面
        $trace[Language::get('nc_debug_current_page')] = $_SERVER['REQUEST_URI'] . '<br>';
        //请求时间
        $trace[Language::get('nc_debug_request_time')] = date('Y-m-d H:i:s', $_SERVER['REQUEST_TIME']) . '<br>';
        //系统运行时间
        $query_time = number_format((microtime(true) - StartTime), 3) . 's';
        $trace[Language::get('nc_debug_execution_time')] = $query_time . '<br>';
        //内存
        $trace[Language::get('nc_debug_memory_consumption')] = number_format(memory_get_usage() / 1024 / 1024, 2) . 'MB' . '<br>';
        //请求方法
        $trace[Language::get('nc_debug_request_method')] = $_SERVER['REQUEST_METHOD'] . '<br>';
        //通信协议
        $trace[Language::get('nc_debug_communication_protocol')] = $_SERVER['SERVER_PROTOCOL'] . '<br>';
        //用户代理
        $trace[Language::get('nc_debug_user_agent')] = $_SERVER['HTTP_USER_AGENT'] . '<br>';
        //会话ID
        $trace[Language::get('nc_debug_session_id')] = session_id() . '<br>';
        //执行日志
        $log = Log::read();
        $trace[Language::get('nc_debug_logging')] = count($log) ? count($log) . Language::get('nc_debug_logging_1') . '<br/>' . implode('<br/>', $log) : Language::get('nc_debug_logging_2');
        $trace[Language::get('nc_debug_logging')] = $trace[Language::get('nc_debug_logging')] . '<br>';
        //文件加载
        $files = get_included_files();
        $trace[Language::get('nc_debug_load_files')] = count($files) . str_replace("\n", '<br/>', substr(substr(print_r($files, true), 7), 0, -2)) . '<br>';
        return $trace;
    }
}