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PATH: home / letacommog / letaweb / protected / modules / helpSystem / modules / client / controllers

<?php

/**
 * TopicController class file.
 * @author  Digital Mesh <info@digitalmesh.com>
 * @copyright Copyright &copy; Digital Mesh 2013-
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 * @package HelpSystem
 */

/**
 * TopicController Class is used to list all topics under a particular section 
 * and also to display content of an individual topic selected. 
 */
class TopicController extends DMController
{
	/**
	 * Index function will return list of all available topics under a particular
	 * section when a section Id is passed to it. If a Topic Id is passed then
	 * Index function will return Text(Content) related to that topic Id.  
	 */
	public function actionIndex()
	{
		$sectionId	= CHttpRequest::getParam('sectionId', 0);//Section Id
		$topicId	= CHttpRequest::getParam('topicId', 0);//Topic Id
		$topicDao = new TopicDao();
		$data = $topicDao->getSection($sectionId);//Get List of all topics under the particular section id passed as parameter
		$topicTree = $this->getTopicTree($data);
		$this->renderPartial('index',array(
												'topicTree' => $topicTree,
												'sectionId' => $sectionId,
												));
	}
	/**
	 * actionView is public function
	 * This function is called to get
	 * single topic details in the help widget
	 */
	public function actionView(){
		$sectionId	= CHttpRequest::getParam('sectionId', 0);//Section Id
		$topicId	= CHttpRequest::getParam('topicId', 0);//Topic Id
		$next = 0;
		$prev = 0;
		$topicDao = new TopicDao();
		$data = $topicDao->getSection($sectionId);//Get List of all topics under the particular section id passed as parameter	
		if(!empty($data)){
			$topicTree = $this->getTopicTree($data);
			$topic = $topicDao->getTopic($topicId);
			$page = $this->createNextPre($topicTree);//Get all pages.
			
			$index = array_search($topicId, array_values($page));//Current Page(Index of Current Topic Id)
			$next = ($index < count($page)-1)?$page[$index+1]:0;//Next page(Next Topic Id)
			$prev = ($index != 0)?$page[$index-1]:0;//Previous page(Previous Topic Id)
			$this->renderPartial('topic',array(
					'topic' => $topic,
					'sectionId' => $sectionId,
					'topicId' => $topicId,
					'next' => $next,
					'prev' => $prev,
			));
		}
	}
	/**
	 *  *
	 * @param $data:- Contains list of all topics available under a particular section
	 * This function will return an array of Topic Id's for Pagination.
	 * @return $page array
	 */
	private function buildTree($data)
	{
		$page = array();
		foreach($data as $topic)
		{
			$page[] = $topic->TopicId;
			if(!empty($topic->Topics)){
				foreach($topic->Topics as $child)
				{
					$page[] = $child->TopicId;
					if($child->Topics){
						$children = $this->getChildTopicId($child);
						foreach ($children as $sub){
							$page[] = $sub;
						}
					}
				}
			}
		 }
		 return $page;
	}
	/**
	 * Returns all Sub Topics of a given n Topic.
	 * It further returns the sub topics of the child Topics until it's empty.  
	 * @param integer $topic
	 * @return $children array
	 */
	private function getChildTopicId($topic){
		if(!empty($topic->Topics)){
			$children = array();
			foreach ($topic->Topics as $child){
				$children[]=$child->TopicId;
				if($child->Topics){
					$subChildren = $this->getChildTopicId($child);
					foreach ($subChildren as $sub){
						$children[] = $sub;
					}
				}
			}
			return $children;
		}
	}
	
	/**
	 * Returns the topic tree 
	 * @param array $topicList
	 * @return $topicTree array
	 */
	private function getTopicTree($topicList){
		$topicTree = array();
	
		if(!empty($topicList)){
			foreach ($topicList as $topic){
				$children = '';
				if(!empty($topic->Topics)){
					foreach($topic->Topics as $child){
						$children[]=
						array(
								'id'=>$child->TopicId,
								'title' => $child->TopicTexts[0]->Title,
								'sectionId'=>$child->SectionId,
								'children'=>$this->createChildTree($child)
						);
					}
						
				}
				$topicTree[] = array(
						'id'=>$topic->TopicId,
						'title'=>$topic->TopicTexts[0]->Title,
						'sectionId'=>$topic->SectionId,
						'children'=>$children);
	
			}
		}
		return $topicTree;
	
	}
	
	/**
	 * Returns all pages of the given topic tree as an array of topicId's
	 * @param array $topicTree
	 * @return $page array
	 */
	private function createNextPre($topicTree){
		$page = array();
		
		foreach($topicTree as $topic)
		{
			$page[] = $topic['id'];
			if(!empty($topic['children'])){
					$children = array();
					$children = $this->createNextPre($topic['children']);
					$page = array_merge($page,$children);
				
			}
		}
		return $page;
	}
	
	/**
	 * Returns all topics sorted by Order 
	 * @param Topic $topic
	 * @return $children array
	 */
	private function createChildTree($topic){
		$children = array();
		foreach($topic->Topics as $child){
				
			$children[$child->Order]=
			array(
					'id'=>$child->TopicId,
					'title' => $child->TopicTexts[0]->Title,
					'sectionId'=>$child->SectionId,
					'children'=>$this->createChildTree($child)
			);
	
				
	
		}
		ksort($children);
		return $children;
	}
}

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