Fix various 15.0 bugs

Issue #821,#820,#819

Signed-off-by: Sean Molenaar <sean@seanmolenaar.eu>

2 files changed, 12 insertions, 4 deletions

diff --git a/lib/Db/Item.php b/lib/Db/Item.php
index d7efdd14b..37497049c 100644
--- a/lib/Db/Item.php
+++ b/lib/Db/Item.php
@@ -591,9 +591,11 @@ class Item extends Entity implements IAPI, \JsonSerializable
      *
      * @return boolean
      */
-    public function isSupportedMime(string $mime): bool
+    public function isSupportedMime(?string $mime): bool
     {
+
         return (
+            $mime !== null ||
             stripos($mime, 'audio/') !== false ||
             stripos($mime, 'image/') !== false ||
             stripos($mime, 'video/') !== false);
diff --git a/lib/Db/ItemMapperV2.php b/lib/Db/ItemMapperV2.php
index edb8ba55f..222340744 100644
--- a/lib/Db/ItemMapperV2.php
+++ b/lib/Db/ItemMapperV2.php
@@ -95,12 +95,18 @@ class ItemMapperV2 extends NewsMapperV2
         return $this->findEntity($builder);
     }
 
-    public function findByGuidHash(string $getGuidHash): Item
+    public function findByGuidHash(string $guidHash): Item
     {
-        throw new DoesNotExistException('fasi');
+        $builder = $this->db->getQueryBuilder();
+        $builder->addSelect('*')
+            ->from($this->tableName)
+            ->andWhere('guid_hash = :guid_hash')
+            ->setParameter(':guid_hash', $guidHash, IQueryBuilder::PARAM_STR);
+
+        return $this->findEntity($builder);
     }
 
-    public function findAllForFeed(int $feedId)
+    public function findAllForFeed(int $feedId): array
     {
         $builder = $this->db->getQueryBuilder();
         $builder->addSelect('*')