<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 * This class provides email template functions
 *
 * @package    OSB
 * @subpackage EmailTemplate
 * @category   Helpers
 * @author     Deon George
 * @copyright  (c) 2010 Deon George
 * @license    http://dev.leenooks.net/license.html
 */
class EmailTemplate {
	// We'll store the template here
	private $template;
	private $template_mail;
	private $email_data = array();
	private $default_lang = 'en';
	private $components = array('subject','message_text','message_html');

	public function __construct($template,$language_id=NULL) {

		$this->template = ORM::factory('emailtemplate',array('name'=>$template));

		if (! $this->template->loaded())
			throw new Kohana_Exception('Email template :template not defined in DB',array(':template'=>$template));

		if (is_null($language_id))
			$language_id=$this->default_lang;

		$this->template_mail = $this->template->emailtemplate_translate->where('language_id','=',$language_id)->find();
		if (! $this->template_mail->loaded() AND
			($this->template_mail = $this->template->emailtemplate_translate->where('language_id','=',$this->default_lang)->find()) AND ! $this->template_mail->loaded())

			// @todo Change this to log/email the admin
			throw new Kohana_Exception('No template (:template) found for user language (:language_id) or default language (:default_lang)',
				array(':template'=>$this->template->name,':language_id'=>$language_id,':default_lang'=>$this->default_lang));
	}

	public function __set($key,$value) {
		switch ($key) {
			case 'variables':
				// Our variables should be an array
				if (! is_array($value))
					throw new Kohana_Exception('Values for variables should be an array, however :value was given',array(':value'=>$value));

			case 'to':
				$this->email_data[$key] = $value;
				break;

			default:
				throw new Kohana_Exception('Unknown variable :key (:value)',array(':key'=>$key,':value'=>is_string($value) ? $value : serialize($value)));
		}
	}

	public static function instance($template) {
		return new EmailTemplate($template);
	}

	public function variables() {
		$return = array();
		foreach ($this->components as $v)
			foreach ($this->template_mail->variables($v) as $x=>$y)
				if (! in_array($y,$return))
					array_push($return,$y);

		return $return;
	}

	public function send($admin=FALSE) {
		$e = Email::connect();
		$sm = Swift_Message::newInstance();

		foreach ($this->components as $component) {
			$s = $this->template_mail->$component;

			foreach ($this->template_mail->variables($component) as $k => $v)
				$s = str_replace('%'.$v.'%',$this->email_data['variables'][$v],$s);

			switch ($component) {
				case 'message_html':
					$sm->setBody($s,'text/html');
					break;
				case 'message_text':
					$sm->setBody($s,'text/plain');
					break;
				case 'subject':
					$sm->setSubject($s);
					break;

				default:
					throw new Kohana_Exception('Component :component has not been configured in :method',array(':component'=>$component,':method'=>__METHOD__));
			}
		}

		// @todo This should go to the admin defined in email_setup
		if ($admin OR ($mail = Config::testmail($this->template->name)))
			$sm->setTo($mail);
		else
			$sm->setTo($this->email_data['to']);

		// @todo - Setup queue mode
		$e->send($sm);
	}
}
?>