Don't hardcode column classes in stats

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.

lib/music_library_web/live/stats_live/index.ex

@@ -34,4 +34,22 @@ defmodule MusicLibraryWeb.StatsLive.Index do
        nav_section: :stats
      )}
   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.
+  defp stats_class(collection) do
+    case Enum.count(collection) do
+      1 -> "grid-cols-1"
+      2 -> "grid-cols-2"
+      3 -> "grid-cols-3"
+      4 -> "grid-cols-4"
+      5 -> "grid-cols-5"
+      6 -> "grid-cols-6"
+      7 -> "grid-cols-7"
+      8 -> "grid-cols-8"
+      9 -> "grid-cols-9"
+      _other -> ""
+    end
+  end
 end