[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_web/controllers/source_controller_test.exs

@@ -7,6 +7,7 @@ defmodule PinchflatWeb.SourceControllerTest do
 
   alias Pinchflat.Repo
   alias Pinchflat.Settings
+  alias Pinchflat.Media.FileSyncingWorker
   alias Pinchflat.Sources.SourceDeletionWorker
   alias Pinchflat.Downloading.MediaDownloadWorker
   alias Pinchflat.Metadata.SourceMetadataStorageWorker
@@ -268,6 +269,23 @@ defmodule PinchflatWeb.SourceControllerTest do
     end
   end
 
+  describe "sync_files_on_disk" do
+    test "forces a file sync", %{conn: conn} do
+      source = source_fixture()
+
+      assert [] = all_enqueued(worker: FileSyncingWorker)
+      post(conn, ~p"/sources/#{source.id}/sync_files_on_disk")
+      assert [_] = all_enqueued(worker: FileSyncingWorker)
+    end
+
+    test "redirects to the source page", %{conn: conn} do
+      source = source_fixture()
+
+      conn = post(conn, ~p"/sources/#{source.id}/sync_files_on_disk")
+      assert redirected_to(conn) == ~p"/sources/#{source.id}"
+    end
+  end
+
   defp create_source(_) do
     source = source_fixture()
     media_item = media_item_with_attachments(%{source_id: source.id})