Use localized scrobbled_at label

lib/music_library_web/live/stats_live/index.ex

@@ -10,6 +10,8 @@ defmodule MusicLibraryWeb.StatsLive.Index do
   attr :title, :string, required: true
   attr :class, :string
 
+  @timezone "Europe/London"
+
   defp album_preview(assigns) do
     ~H"""
     <div
@@ -167,17 +169,25 @@ defmodule MusicLibraryWeb.StatsLive.Index do
   end
 
   defp assign_scrobble_activity(socket, recent_tracks) do
-    recent_release_ids = recent_release_ids(recent_tracks)
+    localized_recent_tracks =
+      Enum.map(recent_tracks, fn t ->
+        %{
+          t
+          | scrobbled_at_label: localize_scrobbled_at(t.scrobbled_at_uts, @timezone)
+        }
+      end)
+
+    recent_release_ids = recent_release_ids(localized_recent_tracks)
 
     collected_releases = Collection.collected_releases(recent_release_ids)
     wishlisted_releases = Wishlist.wishlisted_releases(recent_release_ids)
 
     all_artist_ids = Artists.get_all_artist_ids()
-    recent_artist_ids = recent_artist_ids(recent_tracks)
+    recent_artist_ids = recent_artist_ids(localized_recent_tracks)
     artist_ids = MapSet.intersection(all_artist_ids, recent_artist_ids)
 
     recent_albums =
-      recent_tracks
+      localized_recent_tracks
       |> Enum.uniq_by(fn t -> t.album end)
       |> Enum.map(fn t ->
         %{
@@ -190,7 +200,7 @@ defmodule MusicLibraryWeb.StatsLive.Index do
       end)
 
     socket
-    |> stream(:recent_tracks, recent_tracks, reset: true)
+    |> stream(:recent_tracks, localized_recent_tracks, reset: true)
     |> stream(:recent_albums, recent_albums, reset: true)
     |> assign(
       collected_releases: collected_releases,
@@ -220,6 +230,15 @@ defmodule MusicLibraryWeb.StatsLive.Index do
     end)
   end
 
+  defp localize_scrobbled_at(uts, timezone) do
+    ldt =
+      uts
+      |> DateTime.from_unix!()
+      |> DateTime.shift_zone!(timezone)
+
+    "#{ldt.day}/#{ldt.month}/#{ldt.year} #{ldt.hour}:#{ldt.minute}"
+  end
+
   # The Tailwind build step requires all needed classes to be explicitly referenced
   # in the source code, and not dynamically generated. This implies that one cannot
   # (for example) interpolate a number in a class name.