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<?php
namespace Wallabag\ImportBundle\Import;
use Doctrine\ORM\EntityManager;
use OldSound\RabbitMqBundle\RabbitMq\ProducerInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Wallabag\CoreBundle\Entity\Entry;
use Wallabag\CoreBundle\Entity\Tag;
use Wallabag\CoreBundle\Event\EntrySavedEvent;
use Wallabag\CoreBundle\Helper\ContentProxy;
use Wallabag\CoreBundle\Helper\TagsAssigner;
use Wallabag\UserBundle\Entity\User;
abstract class AbstractImport implements ImportInterface
{
protected $em;
protected $logger;
protected $contentProxy;
protected $tagsAssigner;
protected $eventDispatcher;
protected $producer;
protected $user;
protected $markAsRead;
protected $disableContentUpdate = false;
protected $skippedEntries = 0;
protected $importedEntries = 0;
protected $queuedEntries = 0;
public function __construct(EntityManager $em, ContentProxy $contentProxy, TagsAssigner $tagsAssigner, EventDispatcherInterface $eventDispatcher)
{
$this->em = $em;
$this->logger = new NullLogger();
$this->contentProxy = $contentProxy;
$this->tagsAssigner = $tagsAssigner;
$this->eventDispatcher = $eventDispatcher;
}
public function setLogger(LoggerInterface $logger)
{
$this->logger = $logger;
}
/**
* Set RabbitMQ/Redis Producer to send each entry to a queue.
* This method should be called when user has enabled RabbitMQ.
*
* @param ProducerInterface $producer
*/
public function setProducer(ProducerInterface $producer)
{
$this->producer = $producer;
}
/**
* Set current user.
* Could the current *connected* user or one retrieve by the consumer.
*
* @param User $user
*/
public function setUser(User $user)
{
$this->user = $user;
}
/**
* Set whether articles must be all marked as read.
*
* @param bool $markAsRead
*/
public function setMarkAsRead($markAsRead)
{
$this->markAsRead = $markAsRead;
return $this;
}
/**
* Get whether articles must be all marked as read.
*/
public function getMarkAsRead()
{
return $this->markAsRead;
}
/**
* Set whether articles should be fetched for updated content.
*
* @param bool $disableContentUpdate
*/
public function setDisableContentUpdate($disableContentUpdate)
{
$this->disableContentUpdate = $disableContentUpdate;
return $this;
}
/**
* {@inheritdoc}
*/
public function getSummary()
{
return [
'skipped' => $this->skippedEntries,
'imported' => $this->importedEntries,
'queued' => $this->queuedEntries,
];
}
/**
* Parse one entry.
*
* @param array $importedEntry
*
* @return Entry
*/
abstract public function parseEntry(array $importedEntry);
/**
* Fetch content from the ContentProxy (using graby).
* If it fails return the given entry to be saved in all case (to avoid user to loose the content).
*
* @param Entry $entry Entry to update
* @param string $url Url to grab content for
* @param array $content An array with AT LEAST keys title, html, url, language & content_type to skip the fetchContent from the url
*/
protected function fetchContent(Entry $entry, $url, array $content = [])
{
try {
$this->contentProxy->updateEntry($entry, $url, $content, $this->disableContentUpdate);
} catch (\Exception $e) {
$this->logger->error('Error trying to import an entry.', [
'entry_url' => $url,
'error_msg' => $e->getMessage(),
]);
}
}
/**
* Parse and insert all given entries.
*
* @param $entries
*/
protected function parseEntries($entries)
{
$i = 1;
$entryToBeFlushed = [];
foreach ($entries as $importedEntry) {
if ($this->markAsRead) {
$importedEntry = $this->setEntryAsRead($importedEntry);
}
$entry = $this->parseEntry($importedEntry);
if (null === $entry) {
continue;
}
// store each entry to be flushed so we can trigger the entry.saved event for each of them
// entry.saved needs the entry to be persisted in db because it needs it id to generate
// images (at least)
$entryToBeFlushed[] = $entry;
// flush every 20 entries
if (0 === ($i % 20)) {
$this->em->flush();
foreach ($entryToBeFlushed as $entry) {
$this->eventDispatcher->dispatch(EntrySavedEvent::NAME, new EntrySavedEvent($entry));
}
$entryToBeFlushed = [];
// clear only affected entities
$this->em->clear(Entry::class);
$this->em->clear(Tag::class);
}
++$i;
}
$this->em->flush();
if (!empty($entryToBeFlushed)) {
foreach ($entryToBeFlushed as $entry) {
$this->eventDispatcher->dispatch(EntrySavedEvent::NAME, new EntrySavedEvent($entry));
}
}
}
/**
* Parse entries and send them to the queue.
* It should just be a simple loop on all item, no call to the database should be done
* to speedup queuing.
*
* Faster parse entries for Producer.
* We don't care to make check at this time. They'll be done by the consumer.
*
* @param array $entries
*/
protected function parseEntriesForProducer(array $entries)
{
foreach ($entries as $importedEntry) {
// set userId for the producer (it won't know which user is connected)
$importedEntry['userId'] = $this->user->getId();
if ($this->markAsRead) {
$importedEntry = $this->setEntryAsRead($importedEntry);
}
++$this->queuedEntries;
$this->producer->publish(json_encode($importedEntry));
}
}
/**
* Set current imported entry to archived / read.
* Implementation is different accross all imports.
*
* @param array $importedEntry
*
* @return array
*/
abstract protected function setEntryAsRead(array $importedEntry);
}
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