Updated source's friendly_name to default to the collection_name (#29)

lib/pinchflat/media_source/source.ex

@@ -5,6 +5,7 @@ defmodule Pinchflat.Sources.Source do
 
   use Ecto.Schema
   import Ecto.Changeset
+  import Pinchflat.Utils.ChangesetUtils
 
   alias Pinchflat.Media.MediaItem
   alias Pinchflat.Profiles.MediaProfile
@@ -25,6 +26,7 @@ defmodule Pinchflat.Sources.Source do
     collection_name
     collection_id
     collection_type
+    friendly_name
     download_media
     original_url
     media_profile_id
@@ -53,6 +55,7 @@ defmodule Pinchflat.Sources.Source do
   def changeset(source, attrs) do
     source
     |> cast(attrs, @allowed_fields)
+    |> dynamic_default(:friendly_name, fn cs -> get_field(cs, :collection_name) end)
     |> validate_required(@required_fields)
     |> unique_constraint([:collection_id, :media_profile_id])
   end

lib/pinchflat/sources.ex

@@ -118,7 +118,7 @@ defmodule Pinchflat.Sources do
 
   defp add_source_details_by_collection_type(source, changeset, source_details) do
     %Ecto.Changeset{changes: changes} = changeset
-    collection_type = source.collection_type || changes[:collection_type]
+    collection_type = Ecto.Changeset.get_field(changeset, :collection_type)
 
     collection_changes =
       case collection_type do

lib/pinchflat/utils/changeset_utils.ex

@@ -0,0 +1,19 @@
+defmodule Pinchflat.Utils.ChangesetUtils do
+  @moduledoc """
+  Utility methods for working with changesets
+  """
+
+  import Ecto.Changeset
+
+  @doc """
+  Sets the default value of a field if it is nil by applying the given function.
+
+  Returns %Ecto.Changeset{}.
+  """
+  def dynamic_default(changeset, key, value_fn) do
+    case get_field(changeset, key) do
+      nil -> put_change(changeset, key, value_fn.(changeset))
+      _ -> changeset
+    end
+  end
+end

lib/pinchflat/utils/function_utils.ex

@@ -1,6 +1,6 @@
 defmodule Pinchflat.Utils.FunctionUtils do
   @moduledoc """
-  Utility functions for working with functions
+  Utility methods for working with functions
   """
 
   @doc """

lib/pinchflat/utils/string_utils.ex

@@ -1,6 +1,6 @@
 defmodule Pinchflat.Utils.StringUtils do
   @moduledoc """
-  Utility functions for working with strings
+  Utility methods for working with strings
   """
 
   @doc """