[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

lib/pinchflat_web/controllers/sources/source_controller.ex

@@ -8,6 +8,7 @@ defmodule PinchflatWeb.Sources.SourceController do
   alias Pinchflat.Sources.Source
   alias Pinchflat.Media.MediaItem
   alias Pinchflat.Profiles.MediaProfile
+  alias Pinchflat.Media.FileSyncingWorker
   alias Pinchflat.Sources.SourceDeletionWorker
   alias Pinchflat.Downloading.DownloadingHelpers
   alias Pinchflat.SlowIndexing.SlowIndexingHelpers
@@ -175,6 +176,15 @@ defmodule PinchflatWeb.Sources.SourceController do
     )
   end
 
+  def sync_files_on_disk(conn, %{"source_id" => id}) do
+    wrap_forced_action(
+      conn,
+      id,
+      "File sync enqueued.",
+      &FileSyncingWorker.kickoff_with_task/1
+    )
+  end
+
   defp wrap_forced_action(conn, source_id, message, fun) do
     source = Sources.get_source!(source_id)
     fun.(source)