[Enhancement] Added ability to detect when files have been deleted (#399)

* Added function for updating a media item's filepaths on-disk

* Added placeholder action to source page

* Turned the file sync into a job and properly hooked it up to the controller

test/pinchflat/media/file_deletion_test.exs

@@ -1,77 +0,0 @@
-defmodule Pinchflat.Media.FileDeletionTest do
-  use Pinchflat.DataCase
-
-  import Pinchflat.MediaFixtures
-
-  alias Pinchflat.Media.FileDeletion
-
-  describe "delete_outdated_files/2" do
-    test "deletes outdated non-subtitle files" do
-      new_media_item = media_item_with_attachments()
-      old_media_item = media_item_with_attachments()
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(new_media_item.media_filepath)
-      refute File.exists?(old_media_item.media_filepath)
-    end
-
-    test "doesn't delete non-subtitle files if the new file is the same" do
-      new_media_item = media_item_with_attachments()
-      old_media_item = media_item_fixture(%{media_filepath: new_media_item.media_filepath})
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(new_media_item.media_filepath)
-      assert File.exists?(old_media_item.media_filepath)
-    end
-
-    test "doesn't delete the old file if the new file is missing that key" do
-      new_media_item = media_item_fixture(%{media_filepath: nil})
-      old_media_item = media_item_with_attachments()
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(old_media_item.media_filepath)
-    end
-
-    test "deletes outdated subtitle files" do
-      new_media_item = media_item_with_attachments()
-      old_media_item = media_item_with_attachments()
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(get_subtitle_filepath(new_media_item, "en"))
-      refute File.exists?(get_subtitle_filepath(old_media_item, "en"))
-    end
-
-    test "keeps old subtitle files if the new file is the same" do
-      new_media_item = media_item_with_attachments()
-      old_media_item = media_item_fixture(%{subtitle_filepaths: new_media_item.subtitle_filepaths})
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(get_subtitle_filepath(new_media_item, "en"))
-      assert File.exists?(get_subtitle_filepath(old_media_item, "en"))
-    end
-
-    test "doesn't delete old subtitle files if the new file is missing that key" do
-      new_media_item = media_item_fixture(%{subtitle_filepaths: []})
-      old_media_item = media_item_with_attachments()
-
-      assert :ok = FileDeletion.delete_outdated_files(old_media_item, new_media_item)
-
-      assert File.exists?(get_subtitle_filepath(old_media_item, "en"))
-    end
-  end
-
-  defp get_subtitle_filepath(media_item, language) do
-    Enum.reduce_while(media_item.subtitle_filepaths, nil, fn [lang, filepath], acc ->
-      if lang == language do
-        {:halt, filepath}
-      else
-        {:cont, acc}
-      end
-    end)
-  end
-end

test/pinchflat/media/file_syncing_test.exs

@@ -0,0 +1,122 @@
+defmodule Pinchflat.Media.FileSyncingTest do
+  use Pinchflat.DataCase
+
+  import Pinchflat.MediaFixtures
+
+  alias Pinchflat.Media.FileSyncing
+
+  describe "delete_outdated_files/2" do
+    test "deletes outdated non-subtitle files" do
+      new_media_item = media_item_with_attachments()
+      old_media_item = media_item_with_attachments()
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(new_media_item.media_filepath)
+      refute File.exists?(old_media_item.media_filepath)
+    end
+
+    test "doesn't delete non-subtitle files if the new file is the same" do
+      new_media_item = media_item_with_attachments()
+      old_media_item = media_item_fixture(%{media_filepath: new_media_item.media_filepath})
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(new_media_item.media_filepath)
+      assert File.exists?(old_media_item.media_filepath)
+    end
+
+    test "doesn't delete the old file if the new file is missing that key" do
+      new_media_item = media_item_fixture(%{media_filepath: nil})
+      old_media_item = media_item_with_attachments()
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(old_media_item.media_filepath)
+    end
+
+    test "deletes outdated subtitle files" do
+      new_media_item = media_item_with_attachments()
+      old_media_item = media_item_with_attachments()
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(get_subtitle_filepath(new_media_item, "en"))
+      refute File.exists?(get_subtitle_filepath(old_media_item, "en"))
+    end
+
+    test "keeps old subtitle files if the new file is the same" do
+      new_media_item = media_item_with_attachments()
+      old_media_item = media_item_fixture(%{subtitle_filepaths: new_media_item.subtitle_filepaths})
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(get_subtitle_filepath(new_media_item, "en"))
+      assert File.exists?(get_subtitle_filepath(old_media_item, "en"))
+    end
+
+    test "doesn't delete old subtitle files if the new file is missing that key" do
+      new_media_item = media_item_fixture(%{subtitle_filepaths: []})
+      old_media_item = media_item_with_attachments()
+
+      assert :ok = FileSyncing.delete_outdated_files(old_media_item, new_media_item)
+
+      assert File.exists?(get_subtitle_filepath(old_media_item, "en"))
+    end
+  end
+
+  describe "sync_file_presence_on_disk/1" do
+    test "removes attributes whose files are missing" do
+      media_item = media_item_fixture(%{media_filepath: "/tmp/missing_file.mp4"})
+
+      assert media_item.media_filepath
+      assert [updated_media_item] = FileSyncing.sync_file_presence_on_disk([media_item])
+      refute updated_media_item.media_filepath
+    end
+
+    test "doesn't remove attributes where the files still exist" do
+      media_item = media_item_with_attachments()
+
+      assert media_item.media_filepath
+      assert [updated_media_item] = FileSyncing.sync_file_presence_on_disk([media_item])
+      assert updated_media_item.media_filepath
+    end
+
+    test "doesn't touch other attributes if some are missing and some aren't" do
+      media_item = media_item_with_attachments()
+      File.rm(media_item.media_filepath)
+
+      assert media_item.thumbnail_filepath
+      assert media_item.media_filepath
+      assert [updated_media_item] = FileSyncing.sync_file_presence_on_disk([media_item])
+      assert updated_media_item.thumbnail_filepath
+      refute updated_media_item.media_filepath
+    end
+
+    test "removes subtitle files that are missing" do
+      media_item = media_item_fixture(%{subtitle_filepaths: [["en", "/tmp/missing_file.srt"]]})
+
+      assert get_subtitle_filepath(media_item, "en")
+      assert [updated_media_item] = FileSyncing.sync_file_presence_on_disk([media_item])
+      refute get_subtitle_filepath(updated_media_item, "en")
+    end
+
+    test "doesn't remove subtitle files that still exist" do
+      media_item = media_item_with_attachments()
+
+      assert get_subtitle_filepath(media_item, "en")
+      assert [updated_media_item] = FileSyncing.sync_file_presence_on_disk([media_item])
+      assert get_subtitle_filepath(updated_media_item, "en")
+    end
+  end
+
+  defp get_subtitle_filepath(media_item, language) do
+    Enum.reduce_while(media_item.subtitle_filepaths, nil, fn [lang, filepath], acc ->
+      if lang == language do
+        {:halt, filepath}
+      else
+        {:cont, acc}
+      end
+    end)
+  end
+end

test/pinchflat/media/file_syncing_worker_test.exs

@@ -0,0 +1,37 @@
+defmodule Pinchflat.Media.FileSyncingWorkerTest do
+  use Pinchflat.DataCase
+
+  import Pinchflat.MediaFixtures
+  import Pinchflat.SourcesFixtures
+
+  alias Pinchflat.Media.FileSyncingWorker
+
+  describe "kickoff_with_task/3" do
+    test "starts the worker" do
+      source = source_fixture()
+
+      assert [] = all_enqueued(worker: FileSyncingWorker)
+      assert {:ok, _} = FileSyncingWorker.kickoff_with_task(source)
+      assert [_] = all_enqueued(worker: FileSyncingWorker)
+    end
+
+    test "attaches a task" do
+      source = source_fixture()
+
+      assert {:ok, task} = FileSyncingWorker.kickoff_with_task(source)
+      assert task.source_id == source.id
+    end
+  end
+
+  describe "perform/1" do
+    test "syncs file presence on disk" do
+      source = source_fixture()
+      media_item = media_item_fixture(%{media_filepath: "/tmp/missing.mp4", source_id: source.id})
+
+      perform_job(FileSyncingWorker, %{"id" => source.id})
+      updated_media_item = Repo.reload!(media_item)
+
+      refute updated_media_item.media_filepath
+    end
+  end
+end