<?php

class tpl{
		
		private $Contents = array();
		private $Lang;

		private static $pageElementsLoaded = false;
        private static $pageElements = array();

		function tpl()
		{
            $lang = array();
			require_once("Core/Languages/".strtoupper(ACTIVE_LANGUAGE)."/".strtolower(ACTIVE_LANGUAGE).".lang.php");
			$this->Lang = $lang;

            if(!tpl::$pageElementsLoaded)
            {
                tpl::$pageElementsLoaded = true;

                $dirElements = opendir("Core/Page Elements/");
                while(($fileElements = readdir($dirElements)) !== false)
                {
                    if(!is_dir("Core/Page Elements/" . $fileElements) && strpos($fileElements, "element") !== false)
                    {
                        $elementName = "Element_".substr($fileElements,0,strpos($fileElements,"."));
                        require_once("Core/Page Elements/" . $fileElements);

                        if(class_exists($elementName))
                        {
                            $x = new $elementName();
                            $settings = $x::Settings();
                            if($settings["Pageable"] == false)
                            {
                                tpl::$pageElements[$x->elementName] = $x;
                            }
                        }
                    }
                }
                $this->PageElementsLoaded = true;
                closedir($dirElements);

            }
		}
		
		function assign($VarName, $Content, $KeepAlive = 1)
		{
			$this->Contents[$VarName] = $Content;			
		}
		
		function Clear()
		{
			$this->Contents = array();		
		}
		
		function parse( $TemplateFile, $includeElements = false)
		{
			
			$Path = 'Core/Templates/'.$TemplateFile.'.tpl';
			if( !file_exists( $Path ) )
				die("Template Error: While loading the template an error occured. The Template file was not found: ".$Path);	
			
			$createCachedPage = true;
			$TemplateFile = str_replace("/","_",$TemplateFile);
			$cachedPath = 'Core/Templates/Cached/'.$TemplateFile.'.tpl';
			
			if(file_exists($cachedPath))
			{			
				if(filemtime($Path) < filemtime($cachedPath))
				{
					$createCachedPage = false;
				}
			}
			
			if($createCachedPage)
			{
				$handle = fopen($Path, 'r');
				$FileContent =  fread($handle, filesize($Path) );
				fclose($handle);
				
				//search all vars
				$items = array();
				preg_match_all('/\{\$(.*?)\}/',$FileContent,$items);
				foreach($items[1] as $item)
				{	
					$FileContent = str_replace('{$'.$item."}",'<?=$this->getData("'.$item.'")?>',$FileContent);
				}	
				$cachedFile = fopen($cachedPath,"w");
				fwrite($cachedFile,$FileContent);
				fclose($cachedFile);
			}


            ob_start();
			$this->loadCustomVars();
			$assContent = $this->Contents;
	
			include($cachedPath);
					
			$TemplateContent = ob_get_contents();
			ob_end_clean();

			return $TemplateContent;
			
		}

        private function getData($name)
        {
            if(strpos($name,"Element:") !== false)
            {
                $name = str_replace("Element:", "", $name);
                if(isset(tpl::$pageElements[$name]))
                {
                    return tpl::$pageElements[$name]->run();
                }
            }
            return $this->Contents[$name];
        }

		private function loadCustomVars()
		{
			
			foreach($this->Lang as $Key => $Data)
			{				
				$this->assign("L:".$Key, $Data);
			}
			$this->assign("S:SETTING_ROOT",SETTING_ROOT);
			$this->assign("S:SETTING_DOMAIN",SETTING_DOMAIN);
			$this->assign("S:SETTING_LANG", ACTIVE_LANGUAGE);
			$this->assign("S:SETTING_HATCH", ACTIVE_HATCH);
			
			$this->assign("S:PAGE_URL", PAGE_URL);
			$this->assign("S:BASE_URL", BASE_URL);
			$this->assign("S:BASE_URL_COMPONENT", BASE_URL_COMPONENT);
			
			$this->assign("S:SETTING_YEAR", date("Y"));
					
		}
	
	}
?>