Modified authentication with user_signed_in? and current_user

app/controllers/application_controller.rb

@@ -3,10 +3,24 @@ class ApplicationController < ActionController::Base
   before_action :authenticate
 
   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
-      if session_record = Session.find_by_id(cookies.signed[:session_token])
-        Current.session = session_record
-      else
+      unless user_signed_in?
         redirect_to sign_in_path
       end
     end

app/controllers/home_controller.rb

@@ -1,4 +1,5 @@
 class HomeController < ApplicationController
+  skip_before_action :authenticate
   def index
   end
 end

app/views/home/index.html.erb

@@ -1,23 +1,19 @@
 <p style="color: green"><%= notice %></p>
-
-<p>Signed as <%= Current.user.email %></p>
-
-<h2>Login and verification</h2>
-
-<div>
-  <%= link_to "Change password", edit_password_path %>
-</div>
-
-<div>
-  <%= link_to "Change email address", edit_identity_email_path %>
-</div>
-
-<h2>Access history</h2>
-
-<div>
-  <%= link_to "Devices & Sessions", sessions_path %>
-</div>
-
-<br>
-
-<%= button_to "Log out", Current.session, method: :delete %>
+<% if user_signed_in? %>
+  <p>Signed as <%= current_user.email %></p>
+  <h2>Login and verification</h2>
+  <div>
+    <%= link_to "Change password", edit_password_path %>
+  </div>
+  <div>
+    <%= link_to "Change email address", edit_identity_email_path %>
+  </div>
+  <h2>Access history</h2>
+  <div>
+    <%= link_to "Devices & Sessions", sessions_path %>
+  </div>
+  <br>
+  <%= button_to "Log out", Current.session, method: :delete %>
+<% else %>
+  <%= link_to "Log in", sign_in_path %>
+<% end %>