Start integrating playlist support (#13)

* [WIP] updated the output of VideoCollection to include playlists

* Updated source's name to collection_name; supported playlist ID/name fetching

* Hooked up collection_type to form; refactored enqueue_pending_media_downloads

* Added friendly_name to form

* Added media profile link to source view

* Updates comment

lib/pinchflat/tasks/source_tasks.ex

@@ -3,9 +3,11 @@ defmodule Pinchflat.Tasks.SourceTasks do
   This module contains methods for managing tasks (workers) related to sources.
   """
 
+  alias Pinchflat.Media
   alias Pinchflat.Tasks
   alias Pinchflat.MediaSource.Source
   alias Pinchflat.Workers.MediaIndexingWorker
+  alias Pinchflat.Workers.VideoDownloadWorker
 
   @doc """
   Starts tasks for indexing a source's media.
@@ -30,4 +32,27 @@ defmodule Pinchflat.Tasks.SourceTasks do
       end
     end
   end
+
+  @doc """
+  Starts tasks for downloading videos for any of a sources _pending_ media items.
+
+  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
+  that any stragglers are caught if, for some reason, they weren't enqueued
+  or somehow got de-queued.
+
+  I'm not sure of a case where this would happen, but it's cheap insurance.
+
+  Returns :ok
+  """
+  def enqueue_pending_media_downloads(%Source{} = source) do
+    source
+    |> Media.list_pending_media_items_for()
+    |> Enum.each(fn media_item ->
+      media_item
+      |> Map.take([:id])
+      |> VideoDownloadWorker.new()
+      |> Tasks.create_job_with_task(media_item)
+    end)
+  end
 end