interface FeedInterface

interface FeedInterface extends ContentEntityInterface {
    
    /**
     * Sets the title of the feed.
     *
     * @param string $title
     *   The short title of the feed.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setTitle($title);
    
    /**
     * Returns the url to the feed.
     *
     * @return string
     *   The url to the feed.
     */
    public function getUrl();
    
    /**
     * Sets the url to the feed.
     *
     * @param string $url
     *   A string containing the url of the feed.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setUrl($url);
    
    /**
     * Returns the refresh rate of the feed in seconds.
     *
     * @return int
     *   The refresh rate of the feed in seconds.
     */
    public function getRefreshRate();
    
    /**
     * Sets the refresh rate of the feed in seconds.
     *
     * @param int $refresh
     *   The refresh rate of the feed in seconds.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setRefreshRate($refresh);
    
    /**
     * Returns the last time where the feed was checked for new items.
     *
     * @return int
     *   The timestamp when new items were last checked for.
     */
    public function getLastCheckedTime();
    
    /**
     * Sets the time when this feed was queued for refresh, 0 if not queued.
     *
     * @param int $checked
     *   The timestamp of the last refresh.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setLastCheckedTime($checked);
    
    /**
     * Returns the time when this feed was queued for refresh, 0 if not queued.
     *
     * @return int
     *   The timestamp of the last refresh.
     */
    public function getQueuedTime();
    
    /**
     * Sets the time when this feed was queued for refresh, 0 if not queued.
     *
     * @param int $queued
     *   The timestamp of the last refresh.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setQueuedTime($queued);
    
    /**
     * Returns the parent website of the feed.
     *
     * @return string
     *   The parent website of the feed.
     */
    public function getWebsiteUrl();
    
    /**
     * Sets the parent website of the feed.
     *
     * @param string $link
     *   A string containing the parent website of the feed.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setWebsiteUrl($link);
    
    /**
     * Returns the description of the feed.
     *
     * @return string
     *   The description of the feed.
     */
    public function getDescription();
    
    /**
     * Sets the description of the feed.
     *
     * @param string $description
     *   The description of the feed.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setDescription($description);
    
    /**
     * Returns the primary image attached to the feed.
     *
     * @return string
     *   The URL of the primary image attached to the feed.
     */
    public function getImage();
    
    /**
     * Sets the primary image attached to the feed.
     *
     * @param string $image
     *   An image URL.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setImage($image);
    
    /**
     * Returns the calculated hash of the feed data, used for validating cache.
     *
     * @return string
     *   The calculated hash of the feed data.
     */
    public function getHash();
    
    /**
     * Sets the calculated hash of the feed data, used for validating cache.
     *
     * @param string $hash
     *   A string containing the calculated hash of the feed. Must contain
     *   US ASCII characters only.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setHash($hash);
    
    /**
     * Returns the entity tag HTTP response header, used for validating cache.
     *
     * @return string
     *   The entity tag HTTP response header.
     */
    public function getEtag();
    
    /**
     * Sets the entity tag HTTP response header, used for validating cache.
     *
     * @param string $etag
     *   A string containing the entity tag HTTP response header.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setEtag($etag);
    
    /**
     * Return when the feed was modified last time.
     *
     * @return int
     *   The timestamp of the last time the feed was modified.
     */
    public function getLastModified();
    
    /**
     * Sets the last modification of the feed.
     *
     * @param int $modified
     *   The timestamp when the feed was modified.
     *
     * @return $this
     *   The class instance that this method is called on.
     */
    public function setLastModified($modified);
    
    /**
     * Deletes all items from a feed.
     *
     * This will also reset the last checked and modified time of the feed and
     * save it.
     *
     * @return $this
     *   The class instance that this method is called on.
     *
     * @see \Drupal\aggregator\ItemsImporterInterface::delete()
     */
    public function deleteItems();
    
    /**
     * Updates the feed items by triggering the import process.
     *
     * This will also update the last checked time of the feed and save it.
     *
     * @return bool
     *   TRUE if there is new content for the feed FALSE otherwise.
     *
     * @see \Drupal\aggregator\ItemsImporterInterface::refresh()
     */
    public function refreshItems();

}