Add the update method to the episodes.

app/src/Domain/Repository/Episode/EpisodeRepository.php

@@ -16,6 +16,9 @@ class EpisodeRepository implements EpisodeRepositoryInterface
         private DatabaseHandlerInterface $db
     ) { }
 
+    /**
+     * @param array The query results from the database
+     */
     protected function getEpisodeFromResults(array $results): Episode
     {
         $results['createdAt'] = new DateTimeImmutable($results['created_at']);
@@ -54,8 +57,8 @@ class EpisodeRepository implements EpisodeRepositoryInterface
     public function create(Episode $episode): Episode
     {
         $query = "INSERT INTO episodes (
-            title, link, length, description, serialNumber,
-            explicit, publishedDate, episodeType
+            title, link, length, description, serial_number,
+            explicit, published_date, episode_type
         ) VALUE (
             :title, :link, :length, :description, :serialNumber,
             :explicit, :publishedDate, :episodeType
@@ -76,6 +79,33 @@ class EpisodeRepository implements EpisodeRepositoryInterface
         return $episode;
     }
 
+    public function update(Episode $episode): bool
+    {
+        $query = "UPDATE episodes 
+            SET title = :title,
+                link = :link,
+                length = :length,
+                description = :description,
+                serial_number = :serialNumber,
+                explicit = :explicit,
+                published_date = :publishedDate,
+                episode_type = :episodeType
+            WHERE id = :id";
+
+        $result = $this->db->execute($query, [
+            ':title' => $episode->getTitle(),
+            ':link' => $episode->getLink(),
+            ':length' => $episode->getLength(),
+            ':description' => $episode->getDescription(),
+            ':serialNumber' => $episode->getSerialNumber(),
+            ':explicit' => $episode->isExplicit(),
+            ':publishedDate' => $episode->getPublishedDate(),
+            ':episode_type' => $episode->getEpisodeType(),
+        ]);
+
+        return $result;
+    }
+
     /**
      * @TODO Implement a plan for deleting
      */