[Enhancement] Delete media after "x" days (#160)

* [Enhancement] Adds ability to stop media from re-downloading (#159)

* Added column

* Added methods for ignoring media items from future download

* Added new deletion options to controller and UI

* Added controller actions and UI for editing a media item

* Added column to sources

* Added retention period to form

* [WIP] getting retention methods in place

* Hooked up retention worker

* Added column and UI to prevent automatic deletion

* Docs

* Removed unused backfill worker

* Added edit links to media item tabs on source view

* Clarified form wording

* Form wording (again)

lib/pinchflat/media/media_item.ex

@@ -30,7 +30,11 @@ defmodule Pinchflat.Media.MediaItem do
     :subtitle_filepaths,
     :thumbnail_filepath,
     :metadata_filepath,
-    :nfo_filepath
+    :nfo_filepath,
+    # These are user or system controlled fields
+    :prevent_download,
+    :prevent_culling,
+    :culled_at
   ]
   # Pretty much all the fields captured at index are required.
   @required_fields ~w(
@@ -42,7 +46,7 @@ defmodule Pinchflat.Media.MediaItem do
     source_id
     upload_date
     short_form_content
-    )a
+  )a
 
   schema "media_items" do
     # This is _not_ used as the primary key or internally in the database
@@ -70,6 +74,10 @@ defmodule Pinchflat.Media.MediaItem do
     # Will very likely revisit because I can't leave well-enough alone.
     field :subtitle_filepaths, {:array, {:array, :string}}, default: []
 
+    field :prevent_download, :boolean, default: false
+    field :prevent_culling, :boolean, default: false
+    field :culled_at, :utc_datetime
+
     field :matching_search_term, :string, virtual: true
 
     belongs_to :source, Source
@@ -96,4 +104,14 @@ defmodule Pinchflat.Media.MediaItem do
   def filepath_attributes do
     ~w(media_filepath thumbnail_filepath metadata_filepath subtitle_filepaths nfo_filepath)a
   end
+
+  @doc false
+  def filepath_attribute_defaults do
+    filepath_attributes()
+    |> Enum.map(fn
+      :subtitle_filepaths -> {:subtitle_filepaths, []}
+      field -> {field, nil}
+    end)
+    |> Enum.into(%{})
+  end
 end