Added authentication_zero

app/controllers/application_controller.rb

@@ -1,4 +1,32 @@
 class ApplicationController < ActionController::Base
-  # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
-  allow_browser versions: :modern
+  before_action :set_current_request_details
+  before_action :authenticate_user!
+
+  private
+    def current_user
+      Current.user || authenticate_user_from_session
+    end
+    helper_method :current_user
+
+    def authenticate_user_from_session
+      session_record = Session.find_by_id(cookies.signed[:session_token])
+      Current.session = session_record
+      Current.user
+    end
+
+    def user_signed_in?
+      current_user.present?
+    end
+    helper_method :user_signed_in?
+
+    def authenticate_user!
+      unless user_signed_in?
+        redirect_to sign_in_path
+      end
+    end
+
+    def set_current_request_details
+      Current.user_agent = request.user_agent
+      Current.ip_address = request.ip
+    end
 end