Optimize the way tag list is rendered

Instead of retrieve all informations about entries of a tag to just count them, we’ll count them before with a fastest query.

Also change the layout of the tag list in material design

src/Wallabag/CoreBundle/Repository/EntryRepository.php

@@ -309,4 +309,24 @@ class EntryRepository extends EntityRepository
 
         return $qb->getQuery()->getSingleScalarResult();
     }
+
+    /**
+     * Count all entries for a tag and a user.
+     *
+     * @param int $userId
+     * @param int $tagId
+     *
+     * @return int
+     */
+    public function countAllEntriesByUserIdAndTagId($userId, $tagId)
+    {
+        $qb = $this->createQueryBuilder('e')
+            ->select('count(e.id)')
+            ->leftJoin('e.tags', 't')
+            ->where('e.user=:userId')->setParameter('userId', $userId)
+            ->andWhere('t.id=:tagId')->setParameter('tagId', $tagId)
+        ;
+
+        return $qb->getQuery()->getSingleScalarResult();
+    }
 }

src/Wallabag/CoreBundle/Repository/TagRepository.php

@@ -33,19 +33,23 @@ class TagRepository extends EntityRepository
     }
 
     /**
-     * Find all tags with associated entries per user.
+     * Find all tags per user.
      *
      * @param int $userId
      *
      * @return array
      */
-    public function findAllTagsWithEntries($userId)
+    public function findAllTags($userId)
     {
         return $this->createQueryBuilder('t')
+            ->select('t.slug', 't.label', 't.id')
             ->leftJoin('t.entries', 'e')
             ->where('e.user = :userId')->setParameter('userId', $userId)
+            ->groupBy('t.slug')
+            ->addGroupBy('t.label')
+            ->addGroupBy('t.id')
             ->getQuery()
-            ->getResult();
+            ->getArrayResult();
     }
 
     /**