phuctmZigexn · @phuctm · Ba Toi Dang · phuctmZigexn · Ba Toi Dang · phuctmZigexn
--- a/app/helpers/sessions_helper.rb
+++ b/app/helpers/sessions_helper.rb
+      end
+    end
  end

  def logged_in?
    !current_user.nil?
  end

+  #forgets a persistent session
+  def forget(user)
+    user.forget
+    cookies.delete(:user_id)
+    cookies.delete(:remember_token)
+  end
+
  def log_out
--- a/app/helpers/sessions_helper.rb
+++ b/app/helpers/sessions_helper.rb
    session[:user_id] = user.id
  end

+  # remember a user in a persistent session
+  def remember(user)
+    user.remember
+    cookies.permanent.signed[:user_id] = user.id
+    cookies.permanent[:remember_token] = user.remember_token
+  end
+
+  # return the user corresponding to the remember token cookie
  def current_user
-    @current_user ||= User.find_by(id: session[:user_id])
+    if user_id = session[:user_id]
--- a/app/models/user.rb
+++ b/app/models/user.rb
                                                  BCrypt::Engine.cost
    BCrypt::Password.create(string, cost: cost)
  end
+
+  # return a random token
+  def User.new_token
+    SecureRandom.urlsafe_base64
+  end
+
+  def remember
+    self.remember_token = User.new_token
+    update_attribute :remember_digest, User.digest(remember_token)