[Enhancement] Adds ability to enable/disable sources (#481)

* [Unrelated] updated module name for existing liveview module

* Updated toggle component and moved MP index table to a liveview

* [WIP] reverted MP index table; added source count to MP index

* Moved new live table to sources index

* Added 'enabled' boolean to sources

* Got 'enabled' logic working re: downloading pending media

* Updated sources context to do the right thing when a source is updated

* Docs and tests

* Updated slow indexing to maintain its old schedule if re-enabled

* Hooked up the enabled toggle to the sources page

* [Unrelated] added direct links to various tabs on the sources table

* More tests

* Removed unneeded guard in

* Removed outdated comment

lib/pinchflat_web/controllers/media_profiles/media_profile_controller.ex

@@ -1,20 +1,31 @@
 defmodule PinchflatWeb.MediaProfiles.MediaProfileController do
   use PinchflatWeb, :controller
   use Pinchflat.Sources.SourcesQuery
+  use Pinchflat.Profiles.ProfilesQuery
 
   alias Pinchflat.Repo
   alias Pinchflat.Profiles
+  alias Pinchflat.Sources.Source
   alias Pinchflat.Profiles.MediaProfile
   alias Pinchflat.Profiles.MediaProfileDeletionWorker
 
   def index(conn, _params) do
-    media_profiles =
-      MediaProfile
-      |> where([mp], is_nil(mp.marked_for_deletion_at))
-      |> order_by(asc: :name)
-      |> Repo.all()
+    media_profiles_query =
+      from mp in MediaProfile,
+        as: :media_profile,
+        where: is_nil(mp.marked_for_deletion_at),
+        order_by: [asc: mp.name],
+        select: map(mp, ^MediaProfile.__schema__(:fields)),
+        select_merge: %{
+          source_count:
+            subquery(
+              from s in Source,
+                where: s.media_profile_id == parent_as(:media_profile).id,
+                select: count(s.id)
+            )
+        }
 
-    render(conn, :index, media_profiles: media_profiles)
+    render(conn, :index, media_profiles: Repo.all(media_profiles_query))
   end
 
   def new(conn, params) do