<?php

class Template {
    private $path;
    private $data = array();

    public static function render($name, Array $data)
    {
	$template = new Template($name);
	$template->addData($data);
	return $template->fillIn();
    }

    public function __construct($name)
    {
        if (strpos($name, '../') !== false)
            throw new Exception("Template name contains illegal path component.");

        $this->path = $this->getPath($name);

        if ($this->path === false)
            throw new Exception("Template $name not found in templates/ directory.");

        if (!is_readable($this->path))
            throw new Exception("Template $name not readable.");
    }

    public function id()
    {
	return $this->path;
    }

    protected function getPath($name)
    {
	$hallinta = Hallinta::instance();

	$path = $hallinta->basedir() . 'masks/' . $hallinta->module() . '/templates/' . $name . '.phtml';
	if (file_exists($path)) return $path;

	$path = $hallinta->basedir() . 'templates/' . $name . '.phtml';
	if (file_exists($path)) return $path;

	return false;
    }

    public function add($name, $value)
    {
        $this->data[$name] = $value;
    }

    public function addData(Array $data)
    {
	foreach ($data as $name => $value)
	    $this->data[$name] = $value;
    }

    public function fillIn()
    {
        extract($this->data);

	try {
	    ob_start();
	    include($this->path);
	    $text = ob_get_clean();
	} catch (Exception $e) {
	    $text = ob_get_clean();
	    throw new Exception($e->getMessage());
	} catch (Error $e) {
	    $text = ob_get_clean();
	    throw new Exception($e->getMessage());
	}

        return $text;
    }

    public function ajaxLoad(Array $data)
    {
	$this->addData($data);
	return $this->fillIn();
    }
}