progress switching to Timex and allowing user to set week_start_at in settings

lib/shift73k/accounts.ex

@@ -462,4 +462,15 @@ defmodule Shift73k.Accounts do
     |> where(id: ^user_id)
     |> Repo.update_all(set: [fave_shift_template_id: nil])
   end
+
+  ## Week Start at
+
+  @doc """
+  Sets the "week start at" day for user
+  """
+  def set_user_week_start_at(user_id, day) do
+    User
+    |> where(id: ^user_id)
+    |> Repo.update_all(set: [week_start_at: day])
+  end
 end

lib/shift73k/util/dt.ex

@@ -1,10 +1,6 @@
 defmodule Shift73k.Util.Dt do
   @app_vars Application.get_env(:shift73k, :app_global_vars, time_zone: "America/New_York")
-  @time_zone @app_vars[:time_zone]
+  @app_time_zone @app_vars[:time_zone]
 
-  def ndt_to_local(%NaiveDateTime{} = ndt), do: DateTime.from_naive(ndt, @time_zone)
-
-  def format_dt_local({:ok, dt_local}, fstr), do: Calendar.strftime(dt_local, fstr)
-
-  def format_ndt(%NaiveDateTime{} = ndt, fstr), do: ndt |> ndt_to_local() |> format_dt_local(fstr)
+  def app_time_zone, do: @app_time_zone
 end