Translation helper strips ! from action name for lazy translations

lib/telegram/bot/updates_controller/translation.rb

@@ -0,0 +1,36 @@
+module Telegram
+  module Bot
+    class UpdatesController
+      # Provides helpers similar to AbstractController::Translation
+      # but by default uses `action_name_i18n_key` in lazy translation keys
+      # which strips `!` from action names by default. This makes translating
+      # strings for commands more convenient.
+      #
+      # To disable this behaviour use `alias_method :action_name_i18n_key, :action_name`.
+      module Translation
+        # See toplevel description.
+        def translate(key, options = {})
+          if key.to_s.start_with?('.')
+            path = controller_path.tr('/', '.')
+            defaults = [:"#{path}#{key}"]
+            defaults << options[:default] if options[:default]
+            options[:default] = defaults.flatten
+            key = "#{path}.#{action_name_i18n_key}#{key}"
+          end
+          I18n.translate(key, options)
+        end
+        alias :t :translate
+
+        # Strips trailing `!` from action_name.
+        def action_name_i18n_key
+          action_name.chomp('!')
+        end
+
+        def localize(*args)
+          I18n.localize(*args)
+        end
+        alias :l :localize
+      end
+    end
+  end
+end