<?php
/**
 * Element: Dependency
 * Displays an error if given file is not found
 *
 * @package         NoNumber Framework
 * @version         13.3.1
 *
 * @author          Peter van Westen <peter@nonumber.nl>
 * @link            http://www.nonumber.nl
 * @copyright       Copyright © 2012 NoNumber All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

defined('_JEXEC') or die;

jimport('joomla.form.formfield');

class JFormFieldNN_Dependency extends JFormField
{
	public $type = 'Dependency';

	protected function getLabel()
	{
		return '';
	}

	protected function getInput()
	{
		$this->params = $this->element->attributes();

		JHtml::_('behavior.mootools');
		JHtml::script('nnframework/script.min.js', false, true);

		$file = $this->def('file');
		if (!$file) {
			$path = ($this->def('path') == 'site') ? '' : '/administrator';
			$label = $this->def('label');
			$file = $this->def('alias', $label);
			$file = preg_replace('#[^a-z-]#', '', strtolower($file));
			$extension = $this->def('extension');
			switch ($extension) {
				case 'com';
					$file = $path . '/components/com_' . $file . '/com_' . $file . '.xml';
					break;
				case 'mod';
					$file = $path . '/modules/mod_' . $file . '/mod_' . $file . '.xml';
					break;
				case 'plg_editors-xtd';
					$file = '/plugins/editors-xtd/' . $file . '.xml';
					break;
				default:
					$file = '/plugins/system/' . $file . '.xml';
					break;
			}
			$label = JText::_($label) . ' (' . JText::_('NN_' . strtoupper($extension)) . ')';
		} else {
			$label = $this->def('label', 'the main extension');
		}

		nnFieldDependency::setMessage($file, $label);

		return '';
	}

	private function def($val, $default = '')
	{
		return (isset($this->params[$val]) && (string) $this->params[$val] != '') ? (string) $this->params[$val] : $default;
	}
}

class nnFieldDependency
{
	static function setMessage($file, $name)
	{
		jimport('joomla.filesystem.file');

		$file = str_replace('\\', '/', $file);
		if (strpos($file, '/administrator') === 0) {
			$file = str_replace('/administrator', JPATH_ADMINISTRATOR, $file);
		} else {
			$file = JPATH_SITE . '/' . $file;
		}
		$file = str_replace('//', '/', $file);

		$file_alt = preg_replace('#(com|mod)_([a-z-_]+\.)#', '\2', $file);

		if (!JFile::exists($file) && !JFile::exists($file_alt)) {
			$msg = JText::sprintf('NN_THIS_EXTENSION_NEEDS_THE_MAIN_EXTENSION_TO_FUNCTION', JText::_($name));
			$message_set = 0;
			$messageQueue = JFactory::getApplication()->getMessageQueue();
			foreach ($messageQueue as $queue_message) {
				if ($queue_message['type'] == 'error' && $queue_message['message'] == $msg) {
					$message_set = 1;
					break;
				}
			}
			if (!$message_set) {
				JFactory::getApplication()->enqueueMessage($msg, 'error');
			}
		}
	}
}
