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<?php
namespace Wallabag\CoreBundle\Helper;
use Psr\Log\LoggerInterface;
use RulerZ\RulerZ;
use Wallabag\CoreBundle\Entity\Entry;
use Wallabag\CoreBundle\Entity\Tag;
use Wallabag\CoreBundle\Repository\EntryRepository;
use Wallabag\CoreBundle\Repository\TagRepository;
use Wallabag\UserBundle\Entity\User;
class RuleBasedTagger
{
private $rulerz;
private $tagRepository;
private $entryRepository;
private $logger;
public function __construct(RulerZ $rulerz, TagRepository $tagRepository, EntryRepository $entryRepository, LoggerInterface $logger)
{
$this->rulerz = $rulerz;
$this->tagRepository = $tagRepository;
$this->entryRepository = $entryRepository;
$this->logger = $logger;
}
/**
* Add tags from rules defined by the user.
*
* @param Entry $entry Entry to tag
*/
public function tag(Entry $entry)
{
$rules = $this->getRulesForUser($entry->getUser());
foreach ($rules as $rule) {
if (!$this->rulerz->satisfies($entry, $rule->getRule())) {
continue;
}
$this->logger->info('Matching rule.', [
'rule' => $rule->getRule(),
'tags' => $rule->getTags(),
]);
foreach ($rule->getTags() as $label) {
$tag = $this->getTag($label);
$entry->addTag($tag);
}
}
}
/**
* Apply all the tagging rules defined by a user on its entries.
*
* @param User $user
*
* @return array<Entry> A list of modified entries
*/
public function tagAllForUser(User $user)
{
$rules = $this->getRulesForUser($user);
$entries = [];
$tagsCache = [];
foreach ($rules as $rule) {
$qb = $this->entryRepository->getBuilderForAllByUser($user->getId());
$entries = $this->rulerz->filter($qb, $rule->getRule());
foreach ($entries as $entry) {
foreach ($rule->getTags() as $label) {
// avoid new tag duplicate by manually caching them
if (!isset($tagsCache[$label])) {
$tagsCache[$label] = $this->getTag($label);
}
$tag = $tagsCache[$label];
$entry->addTag($tag);
}
}
}
return $entries;
}
/**
* Fetch a tag.
*
* @param string $label The tag's label
*
* @return Tag
*/
private function getTag($label)
{
$tag = $this->tagRepository->findOneByLabel($label);
if (!$tag) {
$tag = new Tag();
$tag->setLabel($label);
}
return $tag;
}
/**
* Retrieves the tagging rules for a given user.
*
* @param User $user
*
* @return array<TaggingRule>
*/
private function getRulesForUser(User $user)
{
return $user->getConfig()->getTaggingRules();
}
}
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