install.php

<?php

/**
 * JEvents Component for Joomla 2.5.x
 *
 * @version     3.1.27
 * @releasedate June 2014
 * @package     JEvents
 * @copyright   Copyright (C) 2008-2012 GWE Systems Ltd, 2006-2008 JEvents Project Group
 * @license     GNU/GPLv2, see http://www.gnu.org/licenses/gpl-2.0.html
 * @link        http://www.jevents.net
 */

// no direct access
defined('_JEXEC') or die('Restricted access');

jimport('joomla.filesystem.folder');
jimport('joomla.filesystem.file');
jimport( 'joomla.application.component.helper' );

class Pkg_JeventsInstallerScript
{
	public function preflight ($type, $parent) {
		// Joomla! broke the update call, so we have to create a workaround check.
		$db = JFactory::getDbo();
		$db->setQuery("SELECT enabled FROM #__extensions WHERE element = 'com_jevents'");
                                 $is_enabled = $db->loadResult();   
		if (!$is_enabled){
			$this->hasJEventsInst = 0;
			return;
		} else {
			$this->hasJEventsInst = 1;
			return;
		}
	}

	public function update($parent)
	{
		return true;
	}

	public function install($parent)
			
	{	
		return true;
	}

	public function uninstall($parent)
	{
		return true;
	}

	/*
	 * enable the plugins
	 */
	
	public function postflight($type, $parent)
	{
		// CSS Styling:
		?> 
		<style type="text/css">
			.adminform tr th:first-child {display:none;}
			table.adminform tr td {padding:15px;}
			div.jev_install {background-color:#f4f4f4;border:1px solid #ccc; border-radius:5px; padding:10px;}
			.installed {clear:both;display:inline-block;}
			.installed ul { width:350px;padding-left:0px;border: 1px solid #ccc;border-radius: 5px;}
			.installed ul li:first-child {border-top-left-radius: 5px;border-top-right-radius: 5px;}
			.installed ul li:last-child {border-bottom-left-radius: 5px;border-bottom-right-radius: 5px;}
			.installed ul li {padding:8px;list-style-type:none;}
			.installed ul li:nth-child(odd) {background-color: #fff;}
			.installed ul li:nth-child(even) {background-color: #D6D6D6;}
			.proceed {display:inline-block; vertical-align:top;}
			div.proceed ul {text-align:center;list-style-type:none;}
			div.proceed ul li {padding:5px;background-color:#fff;border:1px solid #ccc;margin-bottom:10px;border-radius:5px;}
		</style>
		<?php
		// End of CSS Styling
		if ($this->hasJEventsInst == 1) { $inst_text = JText::_('JEV_INST_VERSION_UPRG'); } else {  $inst_text = JText::_('JEV_INST_VERSION');}

		echo "<div class='jev_install'>
				<div class='jev_logo'><img src='http://www.jevents.net/images/JeventsTransparent.png' /></div>
				<div class='version'><h2>". $inst_text .": ".$parent->get('manifest')->version."</h2></div>
				<div class='installed'> 
					<ul>
						<li>JEvents Core Component</li>
						<li>JEvents Module - Latest Events </li>
						<li>JEvents Module - Mini Calendar </li>
						<li>JEvents Module - Filter </li>
						<li>JEvents Module - Legend </li>
						<li>JEvents Module - Switch View </li>
						<li>JEvents Plugin - Search </li>
						<li>JEvents Plugin - Finder </li>
					</ul>
				</div>
				
				<div class='proceed'> 
					<ul>
						<li><a href='index.php?option=com_jevents&task=params.edit' alt='JEvents Configuration'><img src='components/com_jevents/assets/images/jevents_config_sml.png' alt='Configuration Page' /><br/> Configuration</a><br/></li>
						<li><a href='http://www.jevents.net/forum' alt='JEvents Forum'><img src='components/com_jevents/assets/images/support_forum.jpg' alt='JEvents Forum' /><br/>Support Forums</a><br/></li>
						<li><a href='http://www.jevents.net/jevents-15-topmenu/documentation' alt='JEvents Documentation'><img src='components/com_jevents/assets/images/documentation.jpg' alt='JEvents Documentation' /><br/>Documentation</a></li>
					</ul>
				</div>";

		
		if ($this->hasJEventsInst == 0)
		{
			// enable plugin
			$db = JFactory::getDbo();
			$query = "SELECT * FROM #__extensions WHERE name='plg_content_finder' and type='plugin' and element='finder'";
			$db->setQuery($query);
			$finder_q = $db->loadObject();
			$finder = $finder_q->enabled;

			$query = 'SHOW TABLES LIKE "' . $db->getPrefix() . 'finder_types"';
			$db->setQuery($query);
			$finder_types = $db->loadObjectList();

			if (!count($finder_types))
			{
				echo "<div class='alert alert-warning'> Warning! your Joomla! installation is missing the finder_types database table.<br/><br/> You should run a database check and then fix if an error is reporting by <a href='index.php?option=com_installer&view=database' class='btn-warning btn button'>Clicking Here</a></div>";
			}

			if ($finder == 1 && count($finder_types))
			{
				$query = "UPDATE #__extensions SET enabled=1 WHERE folder='finder' and type='plugin' and element='jevents'";
				$db->setQuery($query);
				$db->query();
			}

			$query = "UPDATE #__extensions SET enabled=1 WHERE folder='search' and type='plugin' and element='eventsearch'";
			$db->setQuery($query);
			$db->query();
		}
		echo "</div>";

	}

}