1 files changed, 50 insertions, 0 deletions
diff --git a/actiontext/lib/action_text/engine.rb b/actiontext/lib/action_text/engine.rb
new file mode 100644
index 0000000000..51ff5b575b
--- /dev/null
+++ b/actiontext/lib/action_text/engine.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "rails"
+require "action_controller/railtie"
+require "active_record/railtie"
+require "active_storage/engine"
+
+require "action_text"
+
+module ActionText
+  class Engine < Rails::Engine
+    isolate_namespace ActionText
+    config.eager_load_namespaces << ActionText
+
+    initializer "action_text.attribute" do
+      ActiveSupport.on_load(:active_record) do
+        include ActionText::Attribute
+      end
+    end
+
+    initializer "action_text.attachable" do
+      ActiveSupport.on_load(:active_storage_blob) do
+        include ActionText::Attachable
+
+        def previewable_attachable?
+          representable?
+        end
+      end
+    end
+
+    initializer "action_text.helper" do
+      ActiveSupport.on_load(:action_controller_base) do
+        helper ActionText::Engine.helpers
+      end
+    end
+
+    initializer "action_text.renderer" do |app|
+      app.executor.to_run      { ActionText::Content.renderer = ApplicationController.renderer }
+      app.executor.to_complete { ActionText::Content.renderer = ApplicationController.renderer }
+
+      ActiveSupport.on_load(:action_text_content) do
+        self.renderer = ApplicationController.renderer
+      end
+
+      ActiveSupport.on_load(:action_controller_base) do
+        before_action { ActionText::Content.renderer = ApplicationController.renderer.new(request.env) }
+      end
+    end
+  end
+end