[Enhancement] Allow setting preference for video/audio codec (#255)

* [WIP] started on codec parser

* Added codec preferences to settings model

* [WIP] added basic codec preference fields to settings form

* Hooked up the backend portion of the codec preference work

* Added codec settings to frontend

* Ensured you can remove codec data

lib/pinchflat/settings/setting.ex

@@ -11,7 +11,14 @@ defmodule Pinchflat.Settings.Setting do
     :pro_enabled,
     :yt_dlp_version,
     :apprise_version,
-    :apprise_server
+    :apprise_server,
+    :video_codec_preference,
+    :audio_codec_preference
+  ]
+
+  @virtual_fields [
+    :video_codec_preference_string,
+    :audio_codec_preference_string
   ]
 
   @required_fields ~w(
@@ -25,12 +32,43 @@ defmodule Pinchflat.Settings.Setting do
     field :yt_dlp_version, :string
     field :apprise_version, :string
     field :apprise_server, :string
+
+    field :video_codec_preference, {:array, :string}, default: []
+    field :audio_codec_preference, {:array, :string}, default: []
+    field :video_codec_preference_string, :string, default: nil, virtual: true
+    field :audio_codec_preference_string, :string, default: nil, virtual: true
   end
 
   @doc false
   def changeset(setting, attrs) do
     setting
     |> cast(attrs, @allowed_fields)
+    |> cast(attrs, @virtual_fields, empty_values: [])
+    |> convert_codec_preference_strings()
     |> validate_required(@required_fields)
   end
+
+  defp convert_codec_preference_strings(changeset) do
+    fields = [
+      video_codec_preference_string: :video_codec_preference,
+      audio_codec_preference_string: :audio_codec_preference
+    ]
+
+    Enum.reduce(fields, changeset, fn {virtual_field, actual_field}, changeset ->
+      case get_change(changeset, virtual_field) do
+        nil ->
+          changeset
+
+        value ->
+          new_value =
+            value
+            |> String.split(">")
+            |> Enum.map(&String.trim/1)
+            |> Enum.reject(&(String.trim(&1) == ""))
+            |> Enum.map(&String.downcase/1)
+
+          put_change(changeset, actual_field, new_value)
+      end
+    end)
+  end
 end