Entity/TagRepository.php
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<?php
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namespace IRI\Bundle\WikiTagBundle\Entity;
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use Doctrine\ORM\EntityRepository;
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use IRI\Bundle\WikiTagBundle\Utils\WikiTagUtils;
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use IRI\Bundle\WikiTagBundle\Entity\Tag;
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/**
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 * TagRepository
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 *
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 * This class was generated by the Doctrine ORM. Add your own custom
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 * repository methods below.
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 */
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class TagRepository extends EntityRepository
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{
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    public function getTagCloud($max_tags)
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    {
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        $qb = $this->getEntityManager()->createQueryBuilder();
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        $qb->select('t.id', 't.label', 'COUNT( dt.id ) AS nb_docs');
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        $qb->from('WikiTagBundle:Tag','t');
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        $qb->leftJoin('t.documents', 'dt', 'WITH', 't = dt.tag');
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        $qb->addGroupBy('t.id');
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        $qb->addOrderBy('nb_docs','DESC');
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        $qb->setMaxResults($max_tags);
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        $query = $qb->getQuery();
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        return $query->getResult();
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    }
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    public function getCompletion($seed)
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    {
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        $qb = $this->getEntityManager()->createQueryBuilder();
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        $qb->select('DISTINCT t.label');
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        $qb->from('WikiTagBundle:Tag','t');
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        $qb->where($qb->expr()->orx(
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            $qb->expr()->like('t.label',$qb->expr()->literal(addcslashes(mysql_real_escape_string($seed),"%_")."%")),
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            $qb->expr()->like('t.label',$qb->expr()->literal("%".addcslashes(mysql_real_escape_string($seed),"%_"))),
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            $qb->expr()->like('t.label',$qb->expr()->literal("% ".addcslashes(mysql_real_escape_string($seed),"%_")."%"))
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        ));
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        $query = $qb->getQuery();
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        return $query->getResult();
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    }
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    private function findSemantizedTag($entityList, $normalized_label)
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    {
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        $tag = null;
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        foreach ($entityList as $entity) {
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            if(!is_null($normalized_label) && (!is_a($entity, "\IRI\Bundle\WikiTagBundle\Model\TagInterface") || $normalized_label !== $entity->getNormalizedLabel())) {
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                continue;
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            }
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            $t = $entity;
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            if($tag==null
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            || $tag->getUrlStatus() === Tag::$TAG_URL_STATUS_DICT['unsemantized']
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            || ($tag->getUrlStatus() === Tag::$TAG_URL_STATUS_DICT['null_result'] && $t->getUrlStatus() !== Tag::$TAG_URL_STATUS_DICT['unsemantized'])) {
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                $tag = $t;
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                if($tag->getUrlStatus()!=Tag::$TAG_URL_STATUS_DICT['unsemantized'] && $tag->getUrlStatus()!=Tag::$TAG_URL_STATUS_DICT['null_result']) {
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                    break;
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                }
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            }
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        }
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        return $tag;
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    }
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    /**
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    * Get or create tag. Returns an array(tag:WikiTagTag, revision_id=int, created:Boolean)
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    * @param $tag_label
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    * @param $doctrine
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    * @return multitype:boolean Ambigous <NULL, \IRI\Bundle\WikiTagBundle\Entity\Tag> Ambigous <NULL, unknown, mixed, string> (array(\IRI\Bundle\WikiTagBundle\Model\TagInterface, revision_id=int, created:Boolean))
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    */
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    public function getOrCreateTag($tag_label, $ignore_wikipedia_info=false)
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    {
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        $tag_label_normalized = WikiTagUtils::normalizeTag($tag_label);
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        // We get the wikipedia references for the tag_label
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        // We get or create the tag object
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        $tags = $this->findBy(array('normalizedLabel' => $tag_label_normalized));
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        $tag = $this->findSemantizedTag($tags, null);
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        $uow = $this->getEntityManager()->getUnitOfWork();
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        if(is_null($tag)) {
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            $tag = $this->findSemantizedTag($uow->getScheduledEntityInsertions(), $tag_label_normalized);
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        }
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        if(is_null($tag)) {
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            $tag = $this->findSemantizedTag($uow->getScheduledEntityUpdates(), $tag_label_normalized);
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        }
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        $wp_request_done = false;
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        if($tag==null) {
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            $tag = new Tag();
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            $tag->setLabel($tag_label_normalized);
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            $tag->setOriginalLabel($tag_label);
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            $tag->setNormalizedLabel($tag_label_normalized);
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            $created = true;
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        }
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        else {
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            $created = false;
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        }
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        // We request Wikipedia if the tag is created or if this is a null result
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        if($created==true || $tag->getUrlStatus()===Tag::$TAG_URL_STATUS_DICT['null_result']) {
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            if($wp_request_done==false) {
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                $wp_response = WikiTagUtils::getWikipediaInfo($tag_label_normalized, null, $ignore_wikipedia_info);
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            }
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            $tag->setWikipediaInfo($wp_response);
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            // Save datas.
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            $em = $this->getEntityManager();
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            $em->persist($tag);
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            $wikipedia_revision_id = $wp_response['revision_id'];
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        }
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        elseif($tag!=null && $tag->getWikipediaPageId()!=null) {
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            $wp_response = WikiTagUtils::getWikipediaInfo(null, $tag->getWikipediaPageId(), $ignore_wikipedia_info);
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            $wikipedia_revision_id = $wp_response['revision_id'];
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        }
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        else {
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            $wikipedia_revision_id = null;
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        }
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        return array($tag, $wikipedia_revision_id, $created);//, $wpReponse);
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    }
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}