Add functions to generate dominant colors

lib/music_library/records.ex

@@ -6,7 +6,7 @@ defmodule MusicLibrary.Records do
   import Ecto.Query, warn: false
 
   alias MusicLibrary.Artists
-  alias MusicLibrary.Records.{ArtistRecord, Cover, Record, SearchParser}
+  alias MusicLibrary.Records.{ArtistRecord, Cover, DominantColors, Record, SearchParser}
   alias MusicLibrary.{BackgroundRepo, Repo, Worker}
 
   def essential_fields do
@@ -254,6 +254,21 @@ defmodule MusicLibrary.Records do
     |> BackgroundRepo.insert()
   end
 
+  def generate_dominant_colors(record) do
+    with {:ok, colors} <- DominantColors.extract_dominant_colors(record.cover_data) do
+      update_record(record, %{"dominant_colors" => colors})
+    end
+  end
+
+  def generate_dominant_colors_async(record) do
+    meta = %{title: record.title, artists: Enum.map(record.artists, & &1.name)}
+    params = %{"id" => record.id}
+
+    params
+    |> Worker.GenerateDominantColors.new(meta: meta)
+    |> BackgroundRepo.insert()
+  end
+
   def resize_cover(record) do
     {:ok, thumb_data} = Cover.resize(record.cover_data)
 

lib/music_library/worker/generate_dominant_colors.ex

@@ -0,0 +1,12 @@
+defmodule MusicLibrary.Worker.GenerateDominantColors do
+  use Oban.Worker, queue: :heavy_writes, max_attempts: 3
+
+  @impl Oban.Worker
+  def perform(%Oban.Job{args: %{"id" => record_id}}) do
+    record = MusicLibrary.Records.get_record!(record_id)
+
+    with {:ok, updated_record} <- MusicLibrary.Records.generate_dominant_colors(record) do
+      MusicLibrary.Records.notify_update(updated_record)
+    end
+  end
+end