<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace Think\Behavior;

/**
 * 系统行为扩展：定位模板文件
 * @category   Think
 * @package  Think
 * @subpackage  Behavior
 * @author   liu21st <liu21st@gmail.com>
 */
class LocationTemplate {
    // 行为扩展的执行入口必须是run
    public function run(&$templateFile){
        // 自动定位模板文件
        if(!is_file($templateFile))
            $templateFile   = $this->parseTemplateFile($templateFile);
    }

    /**
     * 自动定位模板文件
     * @access private
     * @param string $templateFile 文件名
     * @return string
     */
    private function parseTemplateFile($template) {
        $template   =   str_replace(':','/',$template);
        if(''==$template) {
            // 如果模板文件名为空 按照默认规则定位
            $template = CONTROLLER_NAME.'/'.ACTION_NAME;
        }elseif(false === strpos($template,'/')){
            $template = CONTROLLER_NAME.'/'.$template;
        }elseif(false === strpos($template,'.')) {
            $template   =  $template;
        }
        $templateFile   =   MODULE_PATH.'view/'.$template.'.html';
        if(!is_file($templateFile))
            throw_exception(L('_TEMPLATE_NOT_EXIST_').'['.$templateFile.']');
        return $templateFile;
    }
}