1 files changed, 336 insertions, 0 deletions
diff --git a/lib/Service/FeedServiceV2.php b/lib/Service/FeedServiceV2.php
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+<?php
+/**
+ * Nextcloud - 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 2012 Alessandro Cosentino
+ * @copyright 2012-2014 Bernhard Posselt
+ */
+
+namespace OCA\News\Service;
+
+use FeedIo\Reader\ReadErrorException;
+use HTMLPurifier;
+
+use OCA\News\Db\FeedMapperV2;
+use OCA\News\Fetcher\FeedFetcher;
+use OCA\News\Service\Exceptions\ServiceConflictException;
+use OCA\News\Service\Exceptions\ServiceNotFoundException;
+use OCP\AppFramework\Db\Entity;
+use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+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\Config\Config;
+use OCA\News\Utility\Time;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Class FeedService
+ *
+ * @package OCA\News\Service
+ */
+class FeedServiceV2 extends Service
+{
+    /**
+     * Class to fetch feeds.
+     * @var FeedFetcher
+     */
+    protected $feedFetcher;
+    /**
+     * Items service.
+     *
+     * @var ItemServiceV2
+     */
+    protected $itemService;
+    /**
+     * HTML Purifier
+     * @var HTMLPurifier
+     */
+    protected $purifier;
+
+    /**
+     * FeedService constructor.
+     *
+     * @param FeedMapperV2    $mapper      DB layer for feeds
+     * @param FeedFetcher     $feedFetcher FeedIO interface
+     * @param ItemServiceV2   $itemService Service to manage items
+     * @param HTMLPurifier    $purifier    HTML Purifier
+     * @param LoggerInterface $logger      Logger
+     */
+    public function __construct(
+        FeedMapperV2 $mapper,
+        FeedFetcher $feedFetcher,
+        ItemServiceV2 $itemService,
+        HTMLPurifier $purifier,
+        LoggerInterface $logger
+    ) {
+        parent::__construct($mapper, $logger);
+
+        $this->feedFetcher = $feedFetcher;
+        $this->itemService = $itemService;
+        $this->purifier = $purifier;
+    }
+
+    /**
+     * Finds all feeds of a user
+     *
+     * @param  string $userId the name of the user
+     *
+     * @return Feed[]
+     */
+    public function findAllForUser(string $userId): array
+    {
+        return $this->mapper->findAllFromUser($userId);
+    }
+
+    /**
+     * Finds a feed of a user
+     *
+     * @param string $userId the name of the user
+     * @param string $id     the id of the feed
+     *
+     * @return Feed
+     *
+     * @throws DoesNotExistException
+     * @throws MultipleObjectsReturnedException
+     */
+    public function findForUser(string $userId, string $id): Feed
+    {
+        return $this->mapper->findFromUser($userId, $id);
+    }
+
+    /**
+     * @param int $id
+     *
+     * @return Feed[]
+     */
+    public function findAllFromFolder(int $id): array
+    {
+        return $this->mapper->findAllFromFolder($id);
+    }
+
+    /**
+     * Finds all feeds of a user and all items in it
+     *
+     * @param  string $userId the name of the user
+     *
+     * @return Feed[]
+     */
+    public function findAllForUserRecursive(string $userId): array
+    {
+        $feeds = $this->mapper->findAllFromUser($userId);
+
+        foreach ($feeds as &$feed) {
+            $items = $this->itemService->findAllForFeed($feed->getId());
+            $feed->items = $items;
+        }
+        return $feeds;
+    }
+
+    /**
+     * Finds all feeds
+     *
+     * @return Feed[]
+     */
+    public function findAll(): array
+    {
+        return $this->mapper->findAll();
+    }
+
+    /**
+     * Check if a feed exists for a user
+     *
+     * @param string $userID the name of the user
+     * @param string $url    the feed URL
+     *
+     * @return bool
+     */
+    public function existsForUser(string $userID, string $url): bool
+    {
+        try {
+            $this->mapper->findByURL($userID, $url);
+            return true;
+        } catch (DoesNotExistException $e) {
+            return false;
+        }
+    }
+
+
+    /**
+     * Creates a new feed
+     *
+     * @param string      $userId   Feed owner
+     * @param string      $feedUrl  Feed URL
+     * @param int         $folderId Target folder, defaults to root
+     * @param string|null $title    The OPML feed title
+     * @param string|null $user     Basic auth username, if set
+     * @param string|null $password Basic auth password if username is set
+     *
+     * @return Feed the newly created feed
+     *
+     * @throws ServiceConflictException The feed already exists
+     * @throws ServiceNotFoundException The url points to an invalid feed
+     */
+    public function create(
+        string $userId,
+        string $feedUrl,
+        int $folderId = 0,
+        bool $full_text = false,
+        ?string $title = null,
+        ?string $user = null,
+        ?string $password = null
+    ): Feed {
+        if ($this->existsForUser($userId, $feedUrl)) {
+            throw new ServiceConflictException('Feed with this URL exists');
+        }
+
+        try {
+            /**
+             * @var Feed   $feed
+             * @var Item[] $items
+             */
+            list($feed, $items) = $this->feedFetcher->fetch($feedUrl, true, $full_text, false, $user, $password);
+            if ($feed === null) {
+                throw new ServiceNotFoundException('Failed to fetch feed');
+            }
+
+            $feed->setFolderId($folderId)
+                ->setUserId($userId)
+                ->setArticlesPerUpdate(count($items));
+
+            if (!is_null($title)) {
+                $feed->setTitle($title);
+            }
+
+            if (!is_null($user)) {
+                $feed->setBasicAuthUser($user)
+                    ->setBasicAuthUser($password);
+            }
+
+            $feed = $this->mapper->insert($feed);
+
+            return $feed;
+        } catch (ReadErrorException $ex) {
+            $this->logger->debug($ex->getMessage());
+            throw new ServiceNotFoundException($ex->getMessage());
+        }
+    }
+
+
+    /**
+     * Update a feed
+     *
+     * @param  Feed   $feed   Feed item
+     * @param  bool   $force  update even if the article exists already
+     *
+     * @return Feed|Entity Database feed entity
+     */
+    public function fetch(Feed $feed, bool $force = false)
+    {
+        if ($feed->getPreventUpdate() === true) {
+            return $feed;
+        }
+
+        // for backwards compability it can be that the location is not set
+        // yet, if so use the url
+        $location = $feed->getLocation() ?? $feed->getUrl();
+
+        try {
+            /**
+             * @var Feed   $feed
+             * @var Item[] $items
+             */
+            list($fetchedFeed, $items) = $this->feedFetcher->fetch(
+                $location,
+                false,
+                $feed->getHttpLastModified(),
+                $feed->getFullTextEnabled(),
+                $feed->getBasicAuthUser(),
+                $feed->getBasicAuthPassword()
+            );
+
+            // if there is no feed it means that no update took place
+            if (!$fetchedFeed) {
+                return $feed;
+            }
+
+            // 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 > $feed->getArticlesPerUpdate()) {
+                $feed->setArticlesPerUpdate($itemCount);
+            }
+
+            $feed->setHttpLastModified($fetchedFeed->getHttpLastModified());
+            $feed->setHttpEtag($fetchedFeed->getHttpEtag());
+            $feed->setLocation($fetchedFeed->getLocation());
+
+            // insert items in reverse order because the first one is
+            // usually the newest item
+            for ($i = $itemCount - 1; $i >= 0; $i--) {
+                $item = $items[$i];
+                $item->setFeedId($feed->getId());
+
+                $item->setTitle($item->getTitle());
+                $item->setUrl($item->getUrl());
+                $item->setAuthor($item->getAuthor());
+                $item->setSearchIndex($item->getSearchIndex());
+                $item->setRtl($item->getRtl());
+                $item->setLastModified($item->getLastModified());
+                $item->setPubDate($item->getPubDate());
+                $item->setUpdatedDate($item->getUpdatedDate());
+                $item->setEnclosureMime($item->getEnclosureMime());
+                $item->setEnclosureLink($item->getEnclosureLink());
+                $item->setBody($this->purifier->purify($item->getBody()));
+
+                // update modes: 0 nothing, 1 set unread
+                if ($feed->getUpdateMode() === 1) {
+                    $item->setUnread(true);
+                }
+
+                $this->itemService->insertOrUpdate($item);
+            }
+
+            // mark feed as successfully updated
+            $feed->setUpdateErrorCount(0);
+            $feed->setLastUpdateError(null);
+        } catch (ReadErrorException $ex) {
+            $feed->setUpdateErrorCount($feed->getUpdateErrorCount() + 1);
+            $feed->setLastUpdateError($ex->getMessage());
+        }
+
+        return $this->mapper->update($feed);
+    }
+
+    public function delete(string $user, int $id)
+    {
+        $feed = $this->mapper->findFromUser($user, $id);
+        $this->mapper->delete($feed);
+    }
+
+    public function purgeDeleted()
+    {
+        $this->mapper->purgeDeleted();
+    }
+
+    public function fetchAll()
+    {
+        return $this->mapper->findAll();
+    }
+}