Show top artists in stats page

lib/music_library/scrobble_activity.ex

@@ -240,6 +240,40 @@ defmodule MusicLibrary.ScrobbleActivity do
     Repo.all(query)
   end
 
+  @doc """
+  Gets the top artists by scrobble count for the given number of days.
+  Returns a list of maps with artist information and play counts.
+  """
+  def get_top_artists_by_days(days, opts) do
+    limit = Keyword.get(opts, :limit, 10)
+    current_time = Keyword.get_lazy(opts, :current_time, &DateTime.utc_now/0)
+    timezone = Keyword.get(opts, :timezone, &resolve_timezone!/0)
+
+    cutoff_timestamp =
+      current_time
+      |> DateTime.add(-days, :day)
+      |> NaiveDateTime.beginning_of_day()
+      |> DateTime.from_naive!(timezone)
+      |> DateTime.to_unix()
+
+    query =
+      from t in Track,
+        where: t.scrobbled_at_uts >= ^cutoff_timestamp,
+        group_by: [
+          fragment("json_extract(artist, '$.name')"),
+          fragment("json_extract(artist, '$.musicbrainz_id')")
+        ],
+        select: %{
+          artist_name: fragment("json_extract(artist, '$.name')"),
+          artist_musicbrainz_id: fragment("json_extract(artist, '$.musicbrainz_id')"),
+          play_count: count(t.scrobbled_at_uts)
+        },
+        order_by: [desc: count(t.scrobbled_at_uts)],
+        limit: ^limit
+
+    Repo.all(query)
+  end
+
   @doc """
   Gets top albums for multiple time periods (30, 90, 365 days).
   Returns a map with the results for each period, along with collected and
@@ -268,6 +302,22 @@ defmodule MusicLibrary.ScrobbleActivity do
     }
   end
 
+  @doc """
+  Gets top artists for multiple time periods (30, 90, 365 days).
+  Returns a map with the results for each period.
+  """
+  def get_top_artists_by_periods(opts) do
+    last_30_days = get_top_artists_by_days(30, opts)
+    last_90_days = get_top_artists_by_days(90, opts)
+    last_365_days = get_top_artists_by_days(365, opts)
+
+    %{
+      last_30_days: last_30_days,
+      last_90_days: last_90_days,
+      last_365_days: last_365_days
+    }
+  end
+
   defp resolve_timezone! do
     Application.get_env(:music_library, MusicLibraryWeb)
     |> Keyword.fetch!(:timezone)