<?php

/**
* ownCloud - News
*
* @author Alessandro Cosentino
* @author Bernhard Posselt
* @copyright 2012 Alessandro Cosentino cosenal@gmail.com
* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*
*/

namespace OCA\News\Bl;

use \OCA\AppFramework\Db\DoesNotExistException;

use \OCA\News\Db\Feed;
use \OCA\News\Db\FeedMapper;
use \OCA\News\Utility\FeedFetcher;
use \OCA\News\Utility\FetcherException;

class FeedBl extends Bl {

	private $feedFetcher;

	public function __construct(FeedMapper $feedMapper,
		                        FeedFetcher $feedFetcher,  ItemBl $itemBl){
		parent::__construct($feedMapper);
		$this->feedFetcher = $feedFetcher;
		$this->itemBl = $itemBl;
	}


	// README: only call this for the cronjob because it does not
	// check that the feeds belong to the right user
	public function findAll(){
		return $this->mapper->findAll();
	}


	public function findAllFromUser($userId){
		return $this->mapper->findAllFromUser($userId);
	}


	public function create($feedUrl, $folderId, $userId){
		// first try if the feed exists already
		try {
			$this->mapper->findByUrlHash(md5($feedUrl), $userId);
			throw new BLException('Can not add feed: Exists already');
		} catch(DoesNotExistException $ex){}
		
		try {
			list($feed, $items) = $this->feedFetcher->fetch($feedUrl);
			
			// insert feed
			$feed->setFolderId($folderId);
			$feed = $this->mapper->insert($feed);

			// insert items
			foreach($items as $item){
				$item->setFeedId($feed->getId());
				$this->itemBl->create($item);
			}

			return $feed;
		} catch(FetcherException $ex){
			throw new BLException('Can not add feed: Not found or bad source');
		}
	}


	public function update($feedId, $userId){
		// TODO: update given feed	
	}


	public function move($feedId, $folderId, $userId){
		$feed = $this->find($feedId, $userId);
		$feed->setFolderId($folderId);
		$this->mapper->update($feed);
	}

	// TODO: delete associated items
}