fix: links to episodes from downloads

src/Twig/Dto/EpisodeIdDto.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Twig\Dto;
+
+class EpisodeIdDto
+{
+    public function __construct(
+        public string $season,
+        public string $episode,
+    ) {}
+
+    public function asEpisodeId(): string
+    {
+        return "S". str_pad($this->season, 2, "0", STR_PAD_LEFT) .
+        "E". str_pad($this->episode, 2, "0", STR_PAD_LEFT);
+    }
+
+    public function __toString(): string
+    {
+        if ("" !== $this->season && "" !== $this->episode) {
+            return $this->asEpisodeId();
+        }
+        return "";
+    }
+}