[Enhancement] Custom media lifecycle scripts (#219)

* Namespaced notification modules under lifecycle

* Added a JSON encoder for all the main model types

* Added startup task to create user script file

* Hook up user script event to media download

* Hooked up media deletion user script

* Added jq to docker deps

* Updated README

lib/pinchflat/profiles/media_profile.ex

@@ -6,6 +6,7 @@ defmodule Pinchflat.Profiles.MediaProfile do
   use Ecto.Schema
   import Ecto.Changeset
 
+  alias __MODULE__
   alias Pinchflat.Sources.Source
 
   @allowed_fields ~w(
@@ -84,4 +85,17 @@ defmodule Pinchflat.Profiles.MediaProfile do
   def ext_regex do
     ~r/\.({{ ?ext ?}}|%\( ?ext ?\)[sS])$/
   end
+
+  @doc false
+  def json_exluded_fields do
+    ~w(__meta__ __struct__ sources)a
+  end
+
+  defimpl Jason.Encoder, for: MediaProfile do
+    def encode(value, opts) do
+      value
+      |> Map.drop(MediaProfile.json_exluded_fields())
+      |> Jason.Encode.map(opts)
+    end
+  end
 end