Add logic to import a batch of Last.fm tracks

lib/last_fm/api.ex

@@ -51,12 +51,14 @@ defmodule LastFm.API do
     |> post_request()
   end
 
-  def get_recent_tracks(config) do
+  def get_recent_tracks(to_uts \\ nil, config) do
     params =
       config
       |> base_params()
       |> Keyword.merge(method: "user.getrecenttracks", limit: 50)
 
+    params = if to_uts, do: Keyword.put(params, :to, to_uts), else: params
+
     config
     |> new_request()
     |> Req.merge(url: "/", params: params)

lib/last_fm/import.ex

@@ -0,0 +1,23 @@
+defmodule LastFm.Import do
+  @insertable_fields [
+    :musicbrainz_id,
+    :title,
+    :artist,
+    :album,
+    :cover_url,
+    :scrobbled_at_uts,
+    :scrobbled_at_label,
+    :last_fm_data
+  ]
+
+  def batch(uts_to) do
+    with {:ok, tracks} <- LastFm.get_tracks(uts_to) do
+      track_params =
+        tracks
+        |> Enum.map(fn t -> Map.take(t, @insertable_fields) end)
+        |> Enum.map(&Map.to_list/1)
+
+      MusicLibrary.Repo.insert_all(LastFm.Track, track_params)
+    end
+  end
+end