Add balance auto reload

Closes #329

app/controllers/registrar/account_controller.rb

@@ -2,6 +2,7 @@ class Registrar
   class AccountController < BaseController
     skip_authorization_check
     helper_method :iban_max_length
+    helper_method :balance_auto_reload_setting
 
     def show; end
 
@@ -25,5 +26,9 @@ class Registrar
     def iban_max_length
       Iban.max_length
     end
+
+    def balance_auto_reload_setting
+      current_registrar_user.registrar.settings['balance_auto_reload']
+    end
   end
 end

app/controllers/registrar/settings/balance_auto_reload_controller.rb

@@ -0,0 +1,52 @@
+class Registrar
+  module Settings
+    class BalanceAutoReloadController < BaseController
+      before_action :authorize
+
+      def edit
+        @type = if current_registrar.settings['balance_auto_reload']
+                  type_params = current_registrar.settings['balance_auto_reload']['type']
+                                                 .except('name')
+                  BalanceAutoReloadTypes::Threshold.new(type_params)
+                else
+                  BalanceAutoReloadTypes::Threshold.new
+                end
+      end
+
+      def update
+        type = BalanceAutoReloadTypes::Threshold.new(type_params)
+        current_registrar.update!(settings: { balance_auto_reload: { type: type } })
+
+        redirect_to registrar_account_path, notice: t('.saved')
+      end
+
+      def destroy
+        current_registrar.settings.delete('balance_auto_reload')
+        current_registrar.save!
+
+        redirect_to registrar_account_path, notice: t('.disabled')
+      end
+
+      private
+
+      def type_params
+        permitted_params = params.require(:type).permit(:amount, :threshold)
+        normalize_params(permitted_params)
+      end
+
+      def normalize_params(params)
+        params[:amount] = params[:amount].to_f
+        params[:threshold] = params[:threshold].to_f
+        params
+      end
+
+      def authorize
+        authorize!(:manage, :balance_auto_reload)
+      end
+
+      def current_registrar
+        current_registrar_user.registrar
+      end
+    end
+  end
+end