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/home/develito/www/components/com_faqbookpro/libraries/navigation.php

<?php
/**
* @title Minitek FAQ Book
* @copyright Copyright (C) 2011-2021 Minitek, All rights reserved.
* @license GNU General Public License version 3 or later.
* @author url https://www.minitek.gr/
* @developers Minitek.gr
*/

defined('_JEXEC') or die;

class FAQBookProLibNavigation
{
	public static function getTopicsTree($item, $level = 1)
	{
		$topicModel = JModelLegacy::getInstance('Topic', 'FAQBookProModel');
		$topicParams = json_decode($item->params, false);
  		$output = '';
		$subitems = $topicModel->getTopicChildren($item->id);

if (count($subitems))
		{
			$depth = self::getTopicDepth($item, $levels = 0);

if ($depth === 0)
			{
		  		$item_class = 'NavLeftUL_endpoint';
				$span_class = 'NavLeftUL_endpointIcon';
			}
			else
			{
		  		$item_class = '';
				$span_class = 'NavLeftUL_navIcon fa fa-chevron-right';
			}

$output .= '<li id="liid'.$item->id.'" class="NavLeftUL_item NavLeftUL_topic '.$item_class.'">';
			$output .= '<a href="'.JRoute::_(FAQBookProHelperRoute::getTopicRoute($item->id)).'" class="NavLeftUL_anchor" onclick="return false;">';
			$output .= '';

if (isset($topicParams->topic_icon_class) && $topicParams->topic_icon_class)
			{
				$output .= 'topic_icon_class.'">';
			}

$output .= $item->title.'';
			$output .= '';
			$output .= '</a>';
			$output .= '<ul class="NavLeftUL_sublist level'.$level.'">';

foreach ($subitems as $subitem)
			{
		  		$output .= self::getTopicsTree($subitem, $level + 1);
			}

$output .= '<li id="backliid'.$item->id.'" class="NavLeftUL_backItem"><a href="#" class="NavLeftUL_anchor" rel="nofollow" onclick="return false;">'.JText::_('COM_FAQBOOKPRO_BACK').'</a></li>';
			$output .= '</ul>';
			$output .= '</li>';
		}
		else
		{
	 		$output .= '<li id="liid'.$item->id.'" class="NavLeftUL_item NavLeftUL_topic NavLeftUL_endpoint">';
			$output .= '<a href="'.JRoute::_(FAQBookProHelperRoute::getTopicRoute($item->id)).'" class="NavLeftUL_anchor" onclick="return false;">';
			$output .= '';

if (isset($topicParams->topic_icon_class) && $topicParams->topic_icon_class)
			{
				$output .= 'topic_icon_class.'">';
			}

$output .= $item->title.'';
			$output .= '';
			$output .= '</a>';
			$output .= '</li>';
		}

return $output;
	}

public static function getTopicDepth($item, $levels)
	{
		$topicModel = JModelLegacy::getInstance('Topic', 'FAQBookProModel');
		$children = $topicModel->getTopicChildren($item->id);

if (count($children))
		{
	  		$levels++;

foreach ($children as $child)
			{
		  		if (count($topicModel->getTopicChildren($child->id)))
				{
					return;
				}
			}
		}

return $levels;
	}
}