/joomla/templates/gantry/html/base_override.php

<?php
/**
 * @version   $Id: base_override.php 9830 2013-04-29 23:56:49Z btowles $
 * @author    RocketTheme http://www.rockettheme.com
 * @copyright Copyright (C) 2007 - 2013 RocketTheme, LLC
 * @license   http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
 */
defined('_JEXEC') or die;

if (!function_exists('base_override_getAvailablePlatformVersions')) {
	/**
	 * Get the list of available platform versions
	 * @return array the list of available Platform Versions
	 */
	function base_override_getAvailablePlatformVersions($dir)
	{
		$family = substr(JVERSION, 0, strpos(JVERSION, '.'));
		$dir    = rtrim($dir, '/\\');
		// find all entries in the dir
		$entries = array();
		if ($handle = opendir($dir)) {
			while (false !== ($entry = readdir($handle))) {
				if ($entry != "." && $entry != ".." && preg_match(sprintf('/^%s\./', $family), $entry) && is_dir($dir . '/' . $entry)) {
					$key             = (preg_match('/^\d+\.\d+$/', $entry)) ? $entry . '.0' : $entry;
					$entries[$entry] = $key;
				}
			}
			closedir($handle);
		}
		$entries = array_filter($entries, 'base_override_versionfilter');
		uksort($entries, 'version_compare');
		return array_reverse(array_keys($entries));
	}

	function base_override_versionfilter($version)
	{
		$jversion = new JVersion();
		return version_compare($version, $jversion->getShortVersion(), '<=');
	}
}

$go_app              = JFactory::getApplication();
$go_current_template = $go_app->getTemplate(true);
$go_search_paths     = array();
$go_jversion         = new JVersion();
$go_backtrace        = debug_backtrace();
$go_called_path      = preg_replace('#[/\\\\]+#', '/', $go_backtrace[0]['file']);
$go_called_array     = explode('/', $go_called_path);

$go_template  = array_pop($go_called_array);
$go_view      = array_pop($go_called_array);
$go_extension = array_pop($go_called_array);

$go_relative_template_override_path = $go_view . '/' . $go_template;
if ($go_extension != 'html') {
	$go_relative_template_override_path = $go_extension . '/' . $go_relative_template_override_path;
}

JLog::add(JText::sprintf('PLG_SYSTEM_GANTRY_LOG_USING_OVERRRIDE', $go_backtrace[0]['file']), JLog::DEBUG, 'gantry');

$go_template_platform_versions = base_override_getAvailablePlatformVersions(implode('/', array(
                                                                                              dirname(__FILE__),
                                                                                              'joomla'
                                                                                         )));
foreach ($go_template_platform_versions as $go_template_version) {
	$go_search_paths[] = implode('/', array(
	                                       dirname(__FILE__),
	                                       'joomla',
	                                       $go_template_version,
	                                       $go_relative_template_override_path
	                                  ));
}

if (defined('GANTRY_OVERRIDES_PATH')) {
	$go_output = '';

	// add fallback rokoverride paths
	$go_platform_versions = gantry_getAvailablePlatformVersions(GANTRY_OVERRIDES_PATH);
	foreach ($go_platform_versions as $go_platform_version) {
		$go_search_paths[] = implode('/', array(
		                                       GANTRY_OVERRIDES_PATH,
		                                       $go_platform_version,
		                                       $go_current_template->params->get('override_set', '2.5'),
		                                       $go_relative_template_override_path
		                                  ));

	}
}

JLog::add(JText::sprintf('PLG_SYSTEM_GANTRY_LOG_OVERRIDE_SEARCH_PATH', implode(',', $go_search_paths)), JLog::DEBUG, 'gantry');
// cycle through the search path and use the first thats there
foreach ($go_search_paths as $go_search_path) {
	if (is_file($go_search_path)) {
		JLog::add(JText::sprintf('PLG_SYSTEM_GANTRY_LOG_FOUND_OVERRIDE_FILE', $go_search_path), JLog::DEBUG, 'gantry');
		ob_start();
		include $go_search_path;
		$go_output = ob_get_clean();
		echo $go_output;
		return;
	}
}

// fallback case to route back to default overrides
if (isset($this) && isset($filetofind)) {
	// Fallback for components
	array_shift($this->_path['template']);
	$go_current_layout = $this->getLayout();
	$go_current_tpl    = preg_replace('/^' . $go_current_layout . '_/', '', pathinfo($filetofind, PATHINFO_FILENAME));
	if ($go_current_tpl == pathinfo($filetofind, PATHINFO_FILENAME)) $go_current_tpl = null;
	echo $this->loadTemplate($go_current_tpl);
	return;
} elseif (isset($module) && isset($path) && isset($attribs)) {
	// Build the base path for the layout
	$go_bPath = JPATH_BASE . '/modules/' . $module->module . '/tmpl/' . basename($go_backtrace[0]['file']);
	$go_dPath = JPATH_BASE . '/modules/' . $module->module . '/tmpl/default.php';

	if (file_exists($go_bPath)) {
		require $go_bPath;
		return;
	} elseif (file_exists($go_dPath)) {
		require $go_dPath;
		return;
	}
}
JLog::add(JText::sprintf('PLG_SYSTEM_GANTRY_LOG_UNABLE_TO_FIND_FALLBACK', $go_backtrace[0]['file']), JLog::ERROR, 'gantry');
throw new Exception(JText::sprintf('PLG_SYSTEM_GANTRY_ERROR_UNABLE_TO_FIND_FALLBACK_OVERRIDE', $go_backtrace[0]['file']));