/**
* {@inheritdoc}
*/
public function fetch(FeedInterface $feed)
{
if ($feed->label() == 'Do not fetch') {
return FALSE;
}
return parent::fetch($feed);
}
/**
* {@inheritdoc}
*/
public function refresh(FeedInterface $feed)
{
// Store feed URL to track changes.
$feed_url = $feed->getUrl();
// Fetch the feed.
try {
$success = $this->fetcherManager->createInstance($this->config->get('fetcher'))->fetch($feed);
} catch (PluginException $e) {
$success = FALSE;
watchdog_exception('aggregator', $e);
}
// Store instances in an array so we dont have to instantiate new objects.
$processor_instances = array();
foreach ($this->config->get('processors') as $processor) {
try {
$processor_instances[$processor] = $this->processorManager->createInstance($processor);
} catch (PluginException $e) {
watchdog_exception('aggregator', $e);
}
}
// We store the hash of feed data in the database. When refreshing a
// feed we compare stored hash and new hash calculated from downloaded
// data. If both are equal we say that feed is not updated.
$hash = hash('sha256', $feed->source_string);
$has_new_content = $success && $feed->getHash() != $hash;
if ($has_new_content) {
// Parse the feed.
try {
if ($this->parserManager->createInstance($this->config->get('parser'))->parse($feed)) {
if (!$feed->getWebsiteUrl()) {
$feed->setWebsiteUrl($feed->getUrl());
}
$feed->setHash($hash);
// Update feed with parsed data.
$feed->save();
// Log if feed URL has changed.
if ($feed->getUrl() != $feed_url) {
$this->logger->notice('Updated URL for feed %title to %url.', array('%title' => $feed->label(), '%url' => $feed->getUrl()));
}
$this->logger->notice('There is new syndicated content from %site.', array('%site' => $feed->label()));
// If there are items on the feed, let enabled processors process them.
if (!empty($feed->items)) {
foreach ($processor_instances as $instance) {
$instance->process($feed);
}
}
}
} catch (PluginException $e) {
watchdog_exception('aggregator', $e);
}
}
// Processing is done, call postProcess on enabled processors.
foreach ($processor_instances as $instance) {
$instance->postProcess($feed);
}
return $has_new_content;
}
/**
* {@inheritdoc}
*/
public function getFeedDuplicates(FeedInterface $feed)
{
$query = \Drupal::entityQuery('aggregator_feed');
$or_condition = $query->orConditionGroup()->condition('title', $feed->label())->condition('url', $feed->getUrl());
$query->condition($or_condition);
if ($feed->id()) {
$query->condition('fid', $feed->id(), '<>');
}
return $this->loadMultiple($query->execute());
}
/**
* {@inheritdoc}
*/
public function fetch(FeedInterface $feed)
{
$request = $this->httpClient->createRequest('GET', $feed->getUrl());
$feed->source_string = FALSE;
// Generate conditional GET headers.
if ($feed->getEtag()) {
$request->addHeader('If-None-Match', $feed->getEtag());
}
if ($feed->getLastModified()) {
$request->addHeader('If-Modified-Since', gmdate(DateTimePlus::RFC7231, $feed->getLastModified()));
}
try {
$response = $this->httpClient->send($request);
// In case of a 304 Not Modified, there is no new content, so return
// FALSE.
if ($response->getStatusCode() == 304) {
return FALSE;
}
$feed->source_string = $response->getBody(TRUE);
$feed->setEtag($response->getHeader('ETag'));
$feed->setLastModified(strtotime($response->getHeader('Last-Modified')));
$feed->http_headers = $response->getHeaders();
// Update the feed URL in case of a 301 redirect.
if ($response->getEffectiveUrl() != $feed->getUrl()) {
$feed->setUrl($response->getEffectiveUrl());
}
return TRUE;
} catch (RequestException $e) {
$this->logger->warning('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage()));
drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage())), 'warning');
return FALSE;
}
}
/**
* {@inheritdoc}
*/
public function parse(FeedInterface $feed)
{
// Set our bridge extension manager to Zend Feed.
Reader::setExtensionManager(\Drupal::service('feed.bridge.reader'));
try {
$channel = Reader::importString($feed->source_string);
} catch (ExceptionInterface $e) {
watchdog_exception('aggregator', $e);
drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage())), 'error');
return FALSE;
}
$feed->setWebsiteUrl($channel->getLink());
$feed->setDescription($channel->getDescription());
if ($image = $channel->getImage()) {
$feed->setImage($image['uri']);
}
// Initialize items array.
$feed->items = array();
foreach ($channel as $item) {
// Reset the parsed item.
$parsed_item = array();
// Move the values to an array as expected by processors.
$parsed_item['title'] = $item->getTitle();
$parsed_item['guid'] = $item->getId();
$parsed_item['link'] = $item->getLink();
$parsed_item['description'] = $item->getDescription();
$parsed_item['author'] = '';
if ($author = $item->getAuthor()) {
$parsed_item['author'] = $author['name'];
}
$parsed_item['timestamp'] = '';
if ($date = $item->getDateModified()) {
$parsed_item['timestamp'] = $date->getTimestamp();
}
// Store on $feed object. This is where processors will look for parsed items.
$feed->items[] = $parsed_item;
}
return TRUE;
}
/**
* {@inheritdoc}
*/
public function fetch(FeedInterface $feed)
{
$request = new Request('GET', $feed->getUrl());
$feed->source_string = FALSE;
// Generate conditional GET headers.
if ($feed->getEtag()) {
$request = $request->withAddedHeader('If-None-Match', $feed->getEtag());
}
if ($feed->getLastModified()) {
$request = $request->withAddedHeader('If-Modified-Since', gmdate(DateTimePlus::RFC7231, $feed->getLastModified()));
}
try {
/** @var \Psr\Http\Message\UriInterface $actual_uri */
$actual_uri = NULL;
$response = $this->httpClientFactory->fromOptions(['allow_redirects' => ['on_redirect' => function (RequestInterface $request, ResponseInterface $response, UriInterface $uri) use(&$actual_uri) {
$actual_uri = (string) $uri;
}]])->send($request);
// In case of a 304 Not Modified, there is no new content, so return
// FALSE.
if ($response->getStatusCode() == 304) {
return FALSE;
}
$feed->source_string = (string) $response->getBody();
if ($response->hasHeader('ETag')) {
$feed->setEtag($response->getHeaderLine('ETag'));
}
if ($response->hasHeader('Last-Modified')) {
$feed->setLastModified(strtotime($response->getHeaderLine('Last-Modified')));
}
$feed->http_headers = $response->getHeaders();
// Update the feed URL in case of a 301 redirect.
if ($actual_uri && $actual_uri !== $feed->getUrl()) {
$feed->setUrl($actual_uri);
}
return TRUE;
} catch (RequestException $e) {
$this->logger->warning('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage()));
drupal_set_message(t('The feed from %site seems to be broken because of error "%error".', array('%site' => $feed->label(), '%error' => $e->getMessage())), 'warning');
return FALSE;
}
}
/**
* Implements \Drupal\aggregator\Plugin\ProcessorInterface::postProcess().
*
* Expires items from a feed depending on expiration settings.
*/
public function postProcess(FeedInterface $feed)
{
$aggregator_clear = $this->configuration['items']['expire'];
if ($aggregator_clear != AGGREGATOR_CLEAR_NEVER) {
// Delete all items that are older than flush item timer.
$age = REQUEST_TIME - $aggregator_clear;
$result = $this->itemQuery->condition('fid', $feed->id())->condition('timestamp', $age, '<')->execute();
if ($result) {
$entities = $this->itemStorage->loadMultiple($result);
$this->itemStorage->delete($entities);
}
}
}
/**
* Confirms an item removal from a feed.
*
* @param \Drupal\aggregator\FeedInterface $feed
* Feed object representing the feed.
*/
public function deleteFeedItems(FeedInterface $feed)
{
$this->drupalPostForm('admin/config/services/aggregator/delete/' . $feed->id(), array(), t('Delete items'));
$this->assertRaw(t('The news items from %title have been deleted.', array('%title' => $feed->label())), 'Feed items deleted.');
}
/**
* Route title callback.
*
* @param \Drupal\aggregator\FeedInterface $aggregator_feed
* The aggregator feed.
*
* @return string
* The feed label.
*/
public function feedTitle(FeedInterface $aggregator_feed)
{
return Xss::filter($aggregator_feed->label());
}
/**
* {@inheritdoc}
*/
public function getItemCount(FeedInterface $feed)
{
$query = \Drupal::entityQuery('aggregator_item')->condition('fid', $feed->id())->count();
return $query->execute();
}
/**
* {@inheritdoc}
*/
public function postProcess(FeedInterface $feed)
{
// Double the refresh rate.
$feed->refresh->value *= 2;
$feed->save();
}
/**
* Route title callback.
*
* @param \Drupal\aggregator\FeedInterface $aggregator_feed
* The aggregator feed.
*
* @return array
* The feed label as a render array.
*/
public function feedTitle(FeedInterface $aggregator_feed)
{
return ['#markup' => $aggregator_feed->label(), '#allowed_tags' => Xss::getHtmlTagList()];
}
/**
* Route title callback.
*
* @param \Drupal\aggregator\FeedInterface $aggregator_feed
* The aggregator feed.
*
* @return string
* The feed label.
*/
public function feedTitle(FeedInterface $aggregator_feed)
{
return SafeMarkup::xssFilter($aggregator_feed->label());
}
