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<?php
/**
* ownCloud - News
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Alessandro Cosentino <cosenal@gmail.com>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @copyright Alessandro Cosentino 2012
* @copyright Bernhard Posselt 2012, 2014
*/
namespace OCA\News\Service;
use \OCP\ILogger;
use \OCP\IL10N;
use \OCP\AppFramework\Db\DoesNotExistException;
use \OCA\News\Db\Feed;
use \OCA\News\Db\Item;
use \OCA\News\Db\FeedMapper;
use \OCA\News\Db\ItemMapper;
use \OCA\News\Fetcher\Fetcher;
use \OCA\News\Fetcher\FetcherException;
use \OCA\News\ArticleEnhancer\Enhancer;
use \OCA\News\Config\Config;
class FeedService extends Service {
private $feedFetcher;
private $itemMapper;
private $feedMapper;
private $logger;
private $l10n;
private $timeFactory;
private $autoPurgeMinimumInterval;
private $enhancer;
private $purifier;
private $loggerParams;
public function __construct(FeedMapper $feedMapper,
Fetcher $feedFetcher,
ItemMapper $itemMapper,
ILogger $logger,
IL10N $l10n,
$timeFactory,
Config $config,
Enhancer $enhancer,
$purifier,
$loggerParams){
parent::__construct($feedMapper);
$this->feedFetcher = $feedFetcher;
$this->itemMapper = $itemMapper;
$this->logger = $logger;
$this->l10n = $l10n;
$this->timeFactory = $timeFactory;
$this->autoPurgeMinimumInterval =
$config->getAutoPurgeMinimumInterval();
$this->enhancer = $enhancer;
$this->purifier = $purifier;
$this->feedMapper = $feedMapper;
$this->loggerParams = $loggerParams;
}
/**
* Finds all feeds of a user
* @param string $userId the name of the user
* @return Feed[]
*/
public function findAll($userId){
return $this->feedMapper->findAllFromUser($userId);
}
/**
* Finds all feeds from all users
* @return array of feeds
*/
public function findAllFromAllUsers() {
return $this->feedMapper->findAll();
}
/**
* Creates a new feed
* @param string $feedUrl the url to the feed
* @param int $folderId the folder where it should be put into, 0 for root
* folder
* @param string $userId for which user the feed should be created
* @param string $title if given, this is used for the opml feed title
* @throws ServiceConflictException if the feed exists already
* @throws ServiceNotFoundException if the url points to an invalid feed
* @return Feed the newly created feed
*/
public function create($feedUrl, $folderId, $userId, $title=null){
// first try if the feed exists already
try {
list($feed, $items) = $this->feedFetcher->fetch($feedUrl);
// try again if feed exists depending on the reported link
try {
$this->feedMapper->findByUrlHash($feed->getUrlHash(), $userId);
throw new ServiceConflictException(
$this->l10n->t('Can not add feed: Exists already'));
// If no matching feed was found everything was ok
} catch(DoesNotExistException $ex){}
// insert feed
$itemCount = count($items);
$feed->setFolderId($folderId);
$feed->setUserId($userId);
$feed->setArticlesPerUpdate($itemCount);
if ($title) {
$feed->setTitle($title);
}
$feed = $this->feedMapper->insert($feed);
// insert items in reverse order because the first one is usually
// the newest item
$unreadCount = 0;
for($i=$itemCount-1; $i>=0; $i--){
$item = $items[$i];
$item->setFeedId($feed->getId());
// check if item exists (guidhash is the same)
// and ignore it if it does
try {
$this->itemMapper->findByGuidHash(
$item->getGuidHash(), $item->getFeedId(), $userId);
continue;
} catch(DoesNotExistException $ex){
$unreadCount += 1;
$item = $this->enhancer->enhance($item, $feed->getLink());
$item->setBody($this->purifier->purify($item->getBody()));
$this->itemMapper->insert($item);
}
}
// set unread count
$feed->setUnreadCount($unreadCount);
return $feed;
} catch(FetcherException $ex){
$this->logger->debug($ex->getMessage(), $this->loggerParams);
throw new ServiceNotFoundException($ex->getMessage());
}
}
/**
* Runs all the feed updates
*/
public function updateAll(){
// TODO: this method is not covered by any tests
$feeds = $this->feedMapper->findAll();
foreach($feeds as $feed){
try {
$this->update($feed->getId(), $feed->getUserId());
} catch(\Exception $ex){
$this->logger->debug(
'Could not update feed ' . $ex->getMessage(),
$this->loggerParams
);
}
}
}
/**
* Updates a single feed
* @param int $feedId the id of the feed that should be updated
* @param string $userId the id of the user
* @throws ServiceNotFoundException if the feed does not exist
* @return Feed the updated feed entity
*/
public function update($feedId, $userId){
try {
$existingFeed = $this->feedMapper->find($feedId, $userId);
if($existingFeed->getPreventUpdate() === true) {
return $existingFeed;
}
// for backwards compability it can be that the location is not set
// yet, if so use the url
$location = $existingFeed->getLocation();
if (!$location) {
$location = $existingFeed->getUrl();
}
try {
list($fetchedFeed, $items) = $this->feedFetcher->fetch(
$location,
false,
$existingFeed->getLastModified(),
$existingFeed->getEtag()
);
// if there is no feed it means that no update took place
if (!$fetchedFeed) {
return $existingFeed;
}
// update number of articles on every feed update
$itemCount = count($items);
// this is needed to adjust to updates that add more items
// than when the feed was created. You can't update the count
// if it's lower because it may be due to the caching headers
// that were sent as the request and it might cause unwanted
// deletion and reappearing of feeds
if ($itemCount > $existingFeed->getArticlesPerUpdate()) {
$existingFeed->setArticlesPerUpdate($itemCount);
}
$existingFeed->setLastModified($fetchedFeed->getLastModified());
$existingFeed->setEtag($fetchedFeed->getEtag());
$existingFeed->setLocation($fetchedFeed->getLocation());
$this->feedMapper->update($existingFeed);
// insert items in reverse order because the first one is
// usually the newest item
for($i=$itemCount-1; $i>=0; $i--){
$item = $items[$i];
$item->setFeedId($existingFeed->getId());
try {
$this->itemMapper->findByGuidHash(
$item->getGuidHash(), $feedId, $userId
);
} catch(DoesNotExistException $ex){
$item = $this->enhancer->enhance($item,
$existingFeed->getLink());
$item->setBody(
$this->purifier->purify($item->getBody())
);
$this->itemMapper->insert($item);
}
}
} catch(FetcherException $ex){
// failed updating is not really a problem, so only log it
$this->logger->debug(
'Can not update feed with url ' . $existingFeed->getUrl() .
' and location ' . $existingFeed->getLocation() .
': ' . $ex->getMessage(),
$this->loggerParams
);
}
return $this->feedMapper->find($feedId, $userId);
} catch (DoesNotExistException $ex){
throw new ServiceNotFoundException('Feed does not exist');
}
}
/**
* Moves a feed into a different folder
* @param int $feedId the id of the feed that should be moved
* @param int $folderId the id of the folder where the feed should be moved
* to
* @param string $userId the name of the user whose feed should be moved
* @throws ServiceNotFoundException if the feed does not exist
*/
public function move($feedId, $folderId, $userId){
$feed = $this->find($feedId, $userId);
$feed->setFolderId($folderId);
$this->feedMapper->update($feed);
}
/**
* Rename a feed
* @param int $feedId the id of the feed that should be moved
* @param string $feedTitle the new title of the feed
* @param string $userId the name of the user whose feed should be renamed
* @throws ServiceNotFoundException if the feed does not exist
*/
public function rename($feedId, $feedTitle, $userId) {
$feed = $this->find($feedId, $userId);
$feed->setTitle($feedTitle);
$this->feedMapper->update($feed);
}
/**
* Import articles
* @param array $json the array with json
* @param string $userId the username
* @return Feed if one had to be created for nonexistent feeds
*/
public function importArticles($json, $userId) {
$url = 'http://owncloud/nofeed';
$urlHash = md5($url);
// build assoc array for fast access
$feeds = $this->findAll($userId);
$feedsDict = [];
foreach($feeds as $feed) {
$feedsDict[$feed->getLink()] = $feed;
}
$createdFeed = false;
// loop over all items and get the corresponding feed
// if the feed does not exist, create a separate feed for them
foreach ($json as $entry) {
$item = Item::fromImport($entry);
$item->setLastModified($this->timeFactory->getTime());
$feedLink = $entry[
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