Adds thumbnails as episode-level images for podcasts (#201)

lib/pinchflat/podcasts/rss_feed_builder.ex

@@ -75,6 +75,8 @@ defmodule Pinchflat.Podcasts.RssFeedBuilder do
   end
 
   defp build_media_item_xml(source, media_item, url_base) do
+    item_image_path = item_image_path(url_base, media_item)
+
     """
     <item>
       <guid isPermaLink="false">#{media_item.uuid}</guid>
@@ -91,6 +93,10 @@ defmodule Pinchflat.Podcasts.RssFeedBuilder do
       <itunes:author>#{safe(source.custom_name)}</itunes:author>
       <itunes:subtitle>#{safe(media_item.title)}</itunes:subtitle>
       <itunes:summary><![CDATA[#{media_item.description}]]></itunes:summary>
+
+      #{item_image_path && ~s(<itunes:image href="#{safe(item_image_path)}"></itunes:image>)}
+      #{item_image_path && ~s(<podcast:images srcset="#{safe(item_image_path)}" />)}
+
       <itunes:explicit>false</itunes:explicit>
     </item>
     """
@@ -117,6 +123,16 @@ defmodule Pinchflat.Podcasts.RssFeedBuilder do
     end
   end
 
+  def item_image_path(url_base, media_item) do
+    if media_item.thumbnail_filepath && File.exists?(media_item.thumbnail_filepath) do
+      extension = Path.extname(media_item.thumbnail_filepath)
+
+      Path.join(url_base, "#{podcast_route(:episode_image, media_item.uuid)}#{extension}")
+    else
+      nil
+    end
+  end
+
   defp generate_upload_date(media_item) do
     media_item.upload_date
     |> DatetimeUtils.date_to_datetime()

lib/pinchflat_web/controllers/podcasts/podcast_controller.ex

@@ -2,8 +2,9 @@ defmodule PinchflatWeb.Podcasts.PodcastController do
   use PinchflatWeb, :controller
 
   alias Pinchflat.Repo
-  alias Pinchflat.Media.MediaQuery
   alias Pinchflat.Sources.Source
+  alias Pinchflat.Media.MediaItem
+  alias Pinchflat.Media.MediaQuery
   alias Pinchflat.Podcasts.RssFeedBuilder
   alias Pinchflat.Podcasts.PodcastHelpers
 
@@ -40,4 +41,16 @@ defmodule PinchflatWeb.Podcasts.PodcastController do
         |> send_file(200, filepath)
     end
   end
+
+  def episode_image(conn, %{"uuid" => uuid}) do
+    media_item = Repo.get_by!(MediaItem, uuid: uuid)
+
+    if media_item.thumbnail_filepath && File.exists?(media_item.thumbnail_filepath) do
+      conn
+      |> put_resp_content_type(MIME.from_path(media_item.thumbnail_filepath))
+      |> send_file(200, media_item.thumbnail_filepath)
+    else
+      send_resp(conn, 404, "Image not found")
+    end
+  end
 end

lib/pinchflat_web/router.ex

@@ -50,6 +50,7 @@ defmodule PinchflatWeb.Router do
 
     get "/sources/:uuid/feed", Podcasts.PodcastController, :rss_feed
     get "/sources/:uuid/feed_image", Podcasts.PodcastController, :feed_image
+    get "/media/:uuid/episode_image", Podcasts.PodcastController, :episode_image
 
     get "/media/:uuid/stream", MediaItems.MediaItemController, :stream
   end