Media downloading indexing options (round 2) (#14)

* Adds options + option builder + metadata parsing for media thumbnails

* Added release-type options to media profile; built option parser for indexing operations

* Added new media_profile options to creation form; made show helper for rendering database items

* Added options for downloading/embedding metadata

* Adds option on sources to not download media (index only)

* reformatted docs

lib/pinchflat/tasks/source_tasks.ex

@@ -35,6 +35,7 @@ defmodule Pinchflat.Tasks.SourceTasks do
 
   @doc """
   Starts tasks for downloading videos for any of a sources _pending_ media items.
+  Jobs are not enqueued if the source is set to not download media. This will return :ok.
 
   NOTE: this starts a download for each media item that is pending,
   not just the ones that were indexed in this job run. This should ensure
@@ -45,7 +46,7 @@ defmodule Pinchflat.Tasks.SourceTasks do
 
   Returns :ok
   """
-  def enqueue_pending_media_downloads(%Source{} = source) do
+  def enqueue_pending_media_downloads(%Source{download_media: true} = source) do
     source
     |> Media.list_pending_media_items_for()
     |> Enum.each(fn media_item ->
@@ -55,4 +56,8 @@ defmodule Pinchflat.Tasks.SourceTasks do
       |> Tasks.create_job_with_task(media_item)
     end)
   end
+
+  def enqueue_pending_media_downloads(%Source{download_media: false} = _source) do
+    :ok
+  end
 end