Implement the update method

app/src/Domain/Repository/Channel/ChannelRepository.php

@@ -113,13 +113,36 @@ class ChannelRepository implements ChannelRepositoryInterface
         return $results->insertId;
     }
 
+    /**
+     * @param Channel $channel
+     * @return bool
+     * @throws Throwable
+     */
     public function update(Channel $channel): bool
     {
-        $query = "UPDATE channels SET ";
+        $query = "UPDATE channels SET name = ?,
+                                      slug = ?,
+                                      description = ?,
+                                      link = ?,
+                                      language = ?,
+                                      copyright = ?,
+                                      explicit = ?";
+
+        $results = await($this->db->query($query, [
+            $channel->getName(),
+            $channel->getSlug(),
+            $channel->getDescription(),
+            $channel->getLink(),
+            $channel->getLanguage(),
+            $channel->getCopyright(),
+            $channel->isExplicit(),
+        ]));
+
+        return (bool) $results->affectedRows;
     }
 
     public function delete(Channel $channel): bool
     {
-
+        return false;
     }
 }