[Enhancement] Redownload new media after a delay (#173)

* Added redownload-related columns

* Added methods for fetching re-downloadable media items

* Filled out redownload worker + tests

* Added redownload worker to config.exs cron

* Added to UI and README

test/pinchflat/downloading/media_download_worker_test.exs

@@ -62,7 +62,9 @@ defmodule Pinchflat.Downloading.MediaDownloadWorkerTest do
 
       assert media_item.media_filepath == nil
       perform_job(MediaDownloadWorker, %{id: media_item.id})
-      assert Repo.reload(media_item).media_filepath != nil
+      media_item = Repo.reload(media_item)
+
+      assert media_item.media_filepath != nil
     end
 
     test "it saves the metadata to the media_item", %{media_item: media_item} do
@@ -149,6 +151,28 @@ defmodule Pinchflat.Downloading.MediaDownloadWorkerTest do
       assert media_item.media_size_bytes > 0
     end
 
+    test "saves redownloaded_at if this is for a redownload", %{media_item: media_item} do
+      expect(YtDlpRunnerMock, :run, fn _url, _opts, _ot, _addl ->
+        {:ok, render_metadata(:media_metadata)}
+      end)
+
+      perform_job(MediaDownloadWorker, %{id: media_item.id, redownload?: true})
+      media_item = Repo.reload(media_item)
+
+      assert media_item.media_redownloaded_at != nil
+    end
+
+    test "doesn't save redownloaded_at if this is not for a redownload", %{media_item: media_item} do
+      expect(YtDlpRunnerMock, :run, fn _url, _opts, _ot, _addl ->
+        {:ok, render_metadata(:media_metadata)}
+      end)
+
+      perform_job(MediaDownloadWorker, %{id: media_item.id})
+      media_item = Repo.reload(media_item)
+
+      assert media_item.media_redownloaded_at == nil
+    end
+
     test "does not blow up if the record doesn't exist" do
       assert :ok = perform_job(MediaDownloadWorker, %{id: 0})
     end

test/pinchflat/downloading/media_redownload_worker_test.exs

@@ -0,0 +1,44 @@
+defmodule Pinchflat.Downloading.MediaRedownloadWorkerTest do
+  use Pinchflat.DataCase
+
+  import Pinchflat.MediaFixtures
+  import Pinchflat.SourcesFixtures
+  import Pinchflat.ProfilesFixtures
+
+  alias Pinchflat.Downloading.MediaDownloadWorker
+  alias Pinchflat.Downloading.MediaRedownloadWorker
+
+  describe "perform/1" do
+    test "kicks off a task for redownloadable media items" do
+      media_profile = media_profile_fixture(%{redownload_delay_days: 4})
+      source = source_fixture(%{media_profile_id: media_profile.id, inserted_at: now_minus(10, :days)})
+
+      media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(6, :days),
+          media_downloaded_at: now_minus(5, :days)
+        })
+
+      perform_job(MediaRedownloadWorker, %{})
+
+      assert [_] = all_enqueued(worker: MediaDownloadWorker, args: %{id: media_item.id, redownload?: true})
+    end
+
+    test "does not kickoff a task for non-redownloadable media items" do
+      media_profile = media_profile_fixture(%{redownload_delay_days: 4})
+      source = source_fixture(%{media_profile_id: media_profile.id, inserted_at: now_minus(10, :days)})
+
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(6, :days),
+          media_downloaded_at: now_minus(1, :day)
+        })
+
+      perform_job(MediaRedownloadWorker, %{})
+
+      assert [] = all_enqueued(worker: MediaDownloadWorker)
+    end
+  end
+end

test/pinchflat/media_test.exs

@@ -130,6 +130,131 @@ defmodule Pinchflat.MediaTest do
     end
   end
 
+  describe "list_redownloadable_media_items/0" do
+    setup do
+      media_profile = media_profile_fixture(%{redownload_delay_days: 4})
+      source = source_fixture(%{media_profile_id: media_profile.id, inserted_at: now_minus(10, :days)})
+
+      {:ok, %{media_profile: media_profile, source: source}}
+    end
+
+    test "returns media eligible for redownload", %{source: source} do
+      media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(6, :days),
+          media_downloaded_at: now_minus(5, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == [media_item]
+    end
+
+    test "returns media items that were downloaded in past but still meet redownload delay", %{source: source} do
+      media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(20, :days),
+          media_downloaded_at: now_minus(19, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == [media_item]
+    end
+
+    test "does not return media items without a media_downloaded_at", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(5, :days),
+          media_downloaded_at: nil
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items that are set to prevent download", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(5, :days),
+          media_downloaded_at: now(),
+          prevent_download: true
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items that have been culled", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(5, :days),
+          media_downloaded_at: now(),
+          culled_at: now()
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items before the download delay", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(3, :days),
+          media_downloaded_at: now_minus(3, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items that have already been redownloaded", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(5, :days),
+          media_downloaded_at: now(),
+          media_redownloaded_at: now()
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items that were first downloaded well after the upload_date", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          media_downloaded_at: now(),
+          upload_date: now_minus(20, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items that were recently uploaded", %{source: source} do
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          media_downloaded_at: now(),
+          upload_date: now_minus(2, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+
+    test "does not return media items without a redownload delay" do
+      media_profile = media_profile_fixture(%{redownload_delay_days: nil})
+      source = source_fixture(%{media_profile_id: media_profile.id})
+
+      _media_item =
+        media_item_fixture(%{
+          source_id: source.id,
+          upload_date: now_minus(6, :days),
+          media_downloaded_at: now_minus(5, :days)
+        })
+
+      assert Media.list_redownloadable_media_items() == []
+    end
+  end
+
   describe "list_pending_media_items_for/1" do
     test "it returns pending without a filepath for a given source" do
       source = source_fixture()