Consolidate hashing into Cover module

lib/music_library/records/cover.ex

@@ -6,6 +6,10 @@ defmodule MusicLibrary.Records.Cover do
     Vix.Vips.Image.write_to_buffer(thumb, ".jpg")
   end
 
+  def hash(cover_data) do
+    :crypto.hash(:sha256, cover_data) |> Base.encode16()
+  end
+
   def correct_size?(cover_data) do
     {:ok, image} = Vix.Vips.Image.new_from_buffer(cover_data)
 

lib/music_library/records/record.ex

@@ -2,7 +2,7 @@ defmodule MusicLibrary.Records.Record do
   use Ecto.Schema
   import Ecto.Changeset
 
-  alias MusicLibrary.Records.Artist
+  alias MusicLibrary.Records.{Artist, Cover}
 
   @formats [:cd, :vinyl, :blu_ray, :dvd, :multi]
   @types [:album, :ep, :live, :compilation, :single, :other]
@@ -159,11 +159,9 @@ defmodule MusicLibrary.Records.Record do
   end
 
   def generate_cover_hash(record = %__MODULE__{cover_data: cover_data}) do
-    hash = :crypto.hash(:sha256, cover_data) |> Base.encode16()
-
     record
     |> change()
-    |> put_change(:cover_hash, hash)
+    |> put_change(:cover_hash, Cover.hash(cover_data))
   end
 
   def generate_cover_hash(changeset) do
@@ -172,8 +170,7 @@ defmodule MusicLibrary.Records.Record do
         changeset
 
       cover_data ->
-        hash = :crypto.hash(:sha256, cover_data) |> Base.encode16()
+        put_change(changeset, :cover_hash, Cover.hash(cover_data))
-        put_change(changeset, :cover_hash, hash)
     end
   end