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/home/develito/public_html/modules/mod_weblinklogo/installer.php

<?php
/**
 * @copyright	Copyright (C) 2011 Simplify Your Web, Inc. All rights reserved.
 * @license		GNU General Public License version 3 or later; see LICENSE.txt
 */

// No direct access to this file
defined('_JEXEC') or die;

jimport('joomla.filesystem.file');
jimport('joomla.filesystem.folder');

/**
 * Script file of the Weblinklogo module
 */
class mod_weblinklogoInstallerScript
{	
	static $version = '1.2.3';
	static $minimum_needed_library_version = '1.3.1';
	static $download_link = 'http://www.simplifyyourweb.com/index.php/downloads/category/23-libraries';
	static $weblinks_download_link = 'http://extensions.joomla.org/extensions/extension/official-extensions/weblinks';
	
	/**
	 * Called before an install/update method
	 *
	 * @return boolean True on success
	 */
	public function preflight($type, $parent) 
	{
		// check if Weblinks component is present
		
		if (!JFolder::exists(JPATH_ROOT.'/components/com_weblinks')) {
			
			$message = JText::_('MOD_WEBLINKLOGO_MISSING_WEBLINKSCOMPONENT').'. <a href="'.self::$weblinks_download_link.'" target="_blank">'.JText::_('MOD_WEBLINKLOGO_DOWNLOAD_WEBLINKSCOMPONENT').'</a>.';
			JFactory::getApplication()->enqueueMessage($message, 'error');
			return false;
		}
		
		// check if syw library is present
					
		if (!JFolder::exists(JPATH_ROOT.'/libraries/syw')) {			
			
			$message = JText::_('SYW_MISSING_SYWLIBRARY').'. <a href="'.self::$download_link.'" target="_blank">'.JText::_('SYW_DOWNLOAD_SYWLIBRARY').'</a>.';
			JFactory::getApplication()->enqueueMessage($message, 'error');
			return false;
			
		} else {
			jimport('syw.version');			
			if (SYWVersion::isCompatible(self::$minimum_needed_library_version)) {
								
				JFactory::getApplication()->enqueueMessage(JText::_('SYW_COMPATIBLE_SYWLIBRARY'), 'message');					
				return true;
				
			} else {
				
				$message = JText::_('SYW_NONCOMPATIBLE_SYWLIBRARY').'. '.JText::_('SYW_UPDATE_SYWLIBRARY').JText::_('SYW_OR').'<a href="'.self::$download_link.'" target="_blank">'.strtolower(JText::_('SYW_DOWNLOAD_SYWLIBRARY')).'</a>.';
				JFactory::getApplication()->enqueueMessage($message, 'error');
				return false;
			}
		}
		
	}
	
	/**
	 * Called after an install/update method
	 *
	 * @return boolean True on success
	 */
	public function postflight($type, $parent) 
	{						
		echo '';			
		echo '<img src="../modules/mod_weblinklogo/images/logo.png" />';
		echo ' '.JText::_('MOD_WEBLINKLOGO_VERSION').' '.self::$version.'';
		echo ' Olivier Buisard @ <a href="http://www.simplifyyourweb.com" target="_blank">Simplify Your Web</a>';
		echo '';
		
		if ($type == 'update') {
			
			// delete unnecessary files
				
			$files = array();
			$files[] = '/modules/mod_weblinklogo/images/normal.png';
			$files[] = '/modules/mod_weblinklogo/images/grow.png';
			$files[] = '/modules/mod_weblinklogo/images/shrink.png';
			$files[] = '/modules/mod_weblinklogo/stylemaster.css.php';
			$files[] = '/modules/mod_weblinklogo/style.css.php';
			
			foreach ($files as $file) {
				if (JFile::exists(JPATH_ROOT.$file) && !JFile::delete(JPATH_ROOT.$file)) {
					JFactory::getApplication()->enqueueMessage(JText::sprintf('MOD_WEBLINKLOGO_ERROR_DELETINGFILEFOLDER', $file), 'warning');
				}
			}
			
			// upgrade warning
			
			JFactory::getApplication()->enqueueMessage(JText::_('MOD_WEBLINKLOGO_WARNING_RELEASENOTES'), 'warning');
			
			// remove old cached headers which may interfere with fixes, updates or new additions
				
			$filenames_to_delete = array();
			
			$filenames = glob(JPATH_ROOT.'/modules/mod_weblinklogo/style_*.css');
			if ($filenames != false) {
				$filenames_to_delete = array_merge($filenames_to_delete, $filenames);
			}
			
			$filenames = glob(JPATH_ROOT.'/modules/mod_weblinklogo/styles/style_*.css');
			if ($filenames != false) {
				$filenames_to_delete = array_merge($filenames_to_delete, $filenames);
			}
			
			$filenames = glob(JPATH_ROOT.'/modules/mod_weblinklogo/animation_*.js');
			if ($filenames != false) {
				$filenames_to_delete = array_merge($filenames_to_delete, $filenames);
			}
			
			foreach ($filenames_to_delete as $filename) {
				if (JFile::exists($filename) && !JFile::delete($filename)) {
					JFactory::getApplication()->enqueueMessage(JText::sprintf('MOD_WEBLINKLOGO_ERROR_DELETINGFILEFOLDER', $filename), 'warning');
				}
			}
			
			// overrides warning
			
			$defaultemplate = '';
			
			$db = JFactory::getDBO();
			$query = "SELECT template FROM #__template_styles WHERE client_id = 0 AND home = 1";
			$db->setQuery($query);
			try {
				$defaultemplate = $db->loadResult();
			} catch (RuntimeException $e) {
				JFactory::getApplication()->enqueueMessage(JText::_('JERROR_AN_ERROR_HAS_OCCURRED'), 'error');
				return true;
			}
			
			$overrides_path = JPATH_ROOT.'/templates/'.$defaultemplate.'/html/';
			
			if (JFolder::exists($overrides_path.'mod_weblinklogo')) {
				JFactory::getApplication()->enqueueMessage(JText::_('MOD_WEBLINKLOGO_WARNING_OVERRIDES'), 'warning');
			}
		}
		
		// language test
		
		$available_languages = array('en-GB', 'fr-FR', 'pt-BR', 'tr-TR', 'sl-SI');
		$current_language = JFactory::getLanguage()->getTag();
		if (!in_array($current_language, $available_languages)) {
			JFactory::getApplication()->enqueueMessage(JText::sprintf('MOD_WEBLINKLOGO_INFO_LANGUAGETRANSLATE', JFactory::getLanguage()->getName()), 'notice');
		}
		
		return true;
	}	
	
	/**
	 * Called on installation
	 *
	 * @return boolean True on success
	 */
	public function install($parent) {}
	
	/**
	 * Called on update
	 *
	 * @return boolean True on success
	 */
	public function update($parent) {}
	
	/**
	 * Called on uninstallation
	 */
	public function uninstall($parent) {}
	
}
?>