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

test/pinchflat/podcasts/rss_feed_builder_test.exs

@@ -137,6 +137,34 @@ defmodule Pinchflat.Podcasts.RssFeedBuilderTest do
       assert String.contains?(item_xml, ~s(length="1234"))
       assert String.contains?(item_xml, ~s(type="video/mp4"))
     end
+
+    test "returns image tags if the media has a thumbnail", %{source: source} do
+      media_item = media_item_with_attachments(%{source_id: source.id, media_size_bytes: 1234})
+
+      res = RssFeedBuilder.build(source)
+      [_before, item_xml, _after] = String.split(res, ~r(</?item>))
+
+      assert String.contains?(
+               item_xml,
+               ~s(<itunes:image href="http://localhost:8945/media/#{media_item.uuid}/episode_image.jpg"></itunes:image>)
+             )
+
+      assert String.contains?(
+               item_xml,
+               ~s(<podcast:images srcset="http://localhost:8945/media/#{media_item.uuid}/episode_image.jpg" />)
+             )
+    end
+
+    test "does not return image tags if the media does not have a thumbnail", %{source: source} do
+      media_item = media_item_with_attachments(%{source_id: source.id})
+      File.rm!(media_item.thumbnail_filepath)
+
+      res = RssFeedBuilder.build(source)
+      [_before, item_xml, _after] = String.split(res, ~r(</?item>))
+
+      refute String.contains?(item_xml, ~s(itunes:image))
+      refute String.contains?(item_xml, ~s(podcast:images))
+    end
   end
 
   defp format_date(date) do

test/pinchflat_web/controllers/podcast_controller_test.exs

@@ -1,6 +1,7 @@
 defmodule PinchflatWeb.PodcastControllerTest do
   use PinchflatWeb.ConnCase
 
+  import Pinchflat.MediaFixtures
   import Pinchflat.SourcesFixtures
 
   describe "rss_feed" do
@@ -35,4 +36,25 @@ defmodule PinchflatWeb.PodcastControllerTest do
       assert conn.resp_body == "Image not found"
     end
   end
+
+  describe "episode_image" do
+    test "returns an episode image if one can be found", %{conn: conn} do
+      media_item = media_item_with_attachments()
+
+      conn = get(conn, ~p"/media/#{media_item.uuid}/episode_image" <> ".jpg")
+
+      assert conn.status == 200
+      assert {"content-type", "image/jpeg; charset=utf-8"} in conn.resp_headers
+      assert conn.resp_body == File.read!(media_item.thumbnail_filepath)
+    end
+
+    test "returns 404 if an image cannot be found", %{conn: conn} do
+      media_item = media_item_fixture()
+
+      conn = get(conn, ~p"/media/#{media_item.uuid}/episode_image" <> ".jpg")
+
+      assert conn.status == 404
+      assert conn.resp_body == "Image not found"
+    end
+  end
 end

test/support/fixtures/media_fixtures.ex

@@ -67,16 +67,24 @@ defmodule Pinchflat.MediaFixtures do
   end
 
   def media_item_with_attachments(attrs \\ %{}) do
-    stored_media_filepath =
+    base_dir =
       Path.join([
         Application.get_env(:pinchflat, :media_directory),
-        "#{:rand.uniform(1_000_000)}",
+        "#{:rand.uniform(1_000_000)}"
-        "#{:rand.uniform(1_000_000)}_media.mp4"
       ])
 
+    stored_media_filepath = Path.join(base_dir, "#media.mp4")
+    thumbnail_filepath = Path.join(base_dir, "thumbnail.jpg")
+
     FilesystemUtils.cp_p!(media_filepath_fixture(), stored_media_filepath)
+    FilesystemUtils.cp_p!(thumbnail_filepath_fixture(), thumbnail_filepath)
+
+    merged_attrs =
+      Map.merge(attrs, %{
+        media_filepath: stored_media_filepath,
+        thumbnail_filepath: thumbnail_filepath
+      })
 
-    merged_attrs = Map.merge(attrs, %{media_filepath: stored_media_filepath})
     media_item_fixture(merged_attrs)
   end