Update permission checking

app/controllers/default/units_controller.rb

@@ -1,11 +1,30 @@
 class Default::UnitsController < ApplicationController
   navigation_tab :units
 
+  before_action :find_unit, only: [:import, :export, :destroy]
+
   before_action except: :index do
-    raise AccessForbidden unless current_user.at_least(:admin)
+    case action_name.to_sym
+    when :import, :import_all
+      raise AccessForbidden unless current_user.at_least(:active)
+    else
+      raise AccessForbidden unless current_user.at_least(:admin)
+    end
   end
 
   def index
     @units = current_user.units.defaults_diff
   end
+
+  def import
+  end
+
+  def import_all
+  end
+
+  def export
+  end
+
+  def destroy
+  end
 end