Serve local cover images

lib/music_library/records.ex

@@ -42,6 +42,11 @@ defmodule MusicLibrary.Records do
   """
   def get_record!(id), do: Repo.get!(Record, id)
 
+  def get_image!(id) do
+    record = get_record!(id)
+    {:ok, record.image_data}
+  end
+
   @doc """
   Creates a record.
 

lib/music_library/records/importer.ex

@@ -61,6 +61,14 @@ defmodule MusicLibrary.Records.Importer do
     end
   end
 
+  def import_cover_image(record) do
+    with {:ok, image_data} <- blob_get(record.image_url) do
+      record
+      |> Rec.add_image_data(image_data)
+      |> MusicLibrary.Repo.update!()
+    end
+  end
+
   def import_all do
     Rec
     |> MusicLibrary.Repo.all()
@@ -97,4 +105,25 @@ defmodule MusicLibrary.Records.Importer do
         {:error, msg}
     end
   end
+
+  defp blob_get(url) do
+    req =
+      Finch.build(:get, url, [
+        {"User-Agent", "MusicLibrary/0.1.0 ( cloud8421@gmail.com )"}
+      ])
+
+    case Finch.request(req, MusicLibrary.Finch) do
+      {:ok, response} when response.status == 200 ->
+        {:ok, response.body}
+
+      {:ok, response} when response.status in 301..308 ->
+        location = :proplists.get_value("location", response.headers)
+        blob_get(location)
+
+      other ->
+        msg = "Failed to fetch data from #{url}, reason: #{inspect(other)}"
+        Logger.error(msg)
+        {:error, msg}
+    end
+  end
 end

lib/music_library/records/record.ex

@@ -7,7 +7,8 @@ defmodule MusicLibrary.Records.Record do
   schema "records" do
     field :type, Ecto.Enum, values: [:album, :ep, :live, :compilation, :single, :other]
     field :title, :string
-    field :image, :string
+    field :image_url, :string
+    field :image_data, :binary
     field :year, :integer
     field :musicbrainz_id, Ecto.UUID
     field :genres, {:array, :string}
@@ -25,8 +26,8 @@ defmodule MusicLibrary.Records.Record do
   @doc false
   def changeset(record, attrs) do
     record
-    |> cast(attrs, [:type, :title, :musicbrainz_id, :year, :genres, :image])
-    |> validate_required([:type, :title, :musicbrainz_id, :year, :genres, :image])
+    |> cast(attrs, [:type, :title, :musicbrainz_id, :year, :genres, :image_url])
+    |> validate_required([:type, :title, :musicbrainz_id, :year, :genres, :image_url])
   end
 
   def add_artists(record, artists_attrs) do
@@ -34,4 +35,8 @@ defmodule MusicLibrary.Records.Record do
     |> change()
     |> put_embed(:artists, artists_attrs)
   end
+
+  def add_image_data(record, image_data) do
+    change(record, image_data: image_data)
+  end
 end