Dump

app/controllers/application_controller.rb

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+class ApplicationController < ActionController::Base
+  include Authentication
+  # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
+  allow_browser versions: :modern
+
+  around_action :switch_locale
+
+  def switch_locale(&action)
+    locale = params[:locale] || I18n.default_locale
+    I18n.with_locale(locale, &action)
+  end
+end

app/controllers/concerns/authentication.rb

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+module Authentication
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :require_authentication
+    helper_method :authenticated?
+  end
+
+  class_methods do
+    def allow_unauthenticated_access(**options)
+      skip_before_action :require_authentication, **options
+    end
+  end
+
+  private
+    def authenticated?
+      resume_session
+    end
+
+    def require_authentication
+      resume_session || request_authentication
+    end
+
+    def resume_session
+      Current.session ||= find_session_by_cookie
+    end
+
+    def find_session_by_cookie
+      Session.find_by(id: cookies.signed[:session_id]) if cookies.signed[:session_id]
+    end
+
+    def request_authentication
+      session[:return_to_after_authenticating] = request.url
+      redirect_to new_session_path
+    end
+
+    def after_authentication_url
+      session.delete(:return_to_after_authenticating) || root_url
+    end
+
+    def start_new_session_for(user)
+      user.sessions.create!(user_agent: request.user_agent, ip_address: request.remote_ip).tap do |session|
+        Current.session = session
+        cookies.signed.permanent[:session_id] = { value: session.id, httponly: true, same_site: :lax }
+      end
+    end
+
+    def terminate_session
+      Current.session.destroy
+      cookies.delete(:session_id)
+    end
+end

app/controllers/passwords_controller.rb

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+class PasswordsController < ApplicationController
+  allow_unauthenticated_access
+  before_action :set_user_by_token, only: %i[ edit update ]
+
+  def new
+  end
+
+  def create
+    if user = User.find_by(email_address: params[:email_address])
+      PasswordsMailer.reset(user).deliver_later
+    end
+
+    redirect_to new_session_path, notice: "Password reset instructions sent (if user with that email address exists)."
+  end
+
+  def edit
+  end
+
+  def update
+    if @user.update(params.permit(:password, :password_confirmation))
+      redirect_to new_session_path, notice: "Password has been reset."
+    else
+      redirect_to edit_password_path(params[:token]), alert: "Passwords did not match."
+    end
+  end
+
+  private
+    def set_user_by_token
+      @user = User.find_by_password_reset_token!(params[:token])
+    rescue ActiveSupport::MessageVerifier::InvalidSignature
+      redirect_to new_password_path, alert: "Password reset link is invalid or has expired."
+    end
+end

app/controllers/products_controller.rb

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+class ProductsController < ApplicationController
+  allow_unauthenticated_access only: %i[ index show ]
+  before_action :set_product, only: %i[ show edit update destroy ]
+
+  def index
+    @products = Product.all
+  end
+
+  def show
+  end
+
+  def new
+    @product = Product.new
+  end
+
+  def create
+    @product = Product.new(product_params)
+    if @product.save
+      redirect_to @product
+    else
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  def edit
+  end
+
+  def update
+    if @product.update(product_params)
+      redirect_to @product
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
+  def destroy
+    @product.destroy
+    redirect_to products_path
+  end
+
+  private
+    def set_product
+      @product = Product.find(params[:id])
+    end
+
+    def product_params
+      params.expect(product: [ :name, :description, :featured_image, :inventory_count ])
+    end
+end

app/controllers/sessions_controller.rb

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+class SessionsController < ApplicationController
+  allow_unauthenticated_access only: %i[ new create ]
+  rate_limit to: 10, within: 3.minutes, only: :create, with: -> { redirect_to new_session_url, alert: "Try again later." }
+
+  def new
+  end
+
+  def create
+    if user = User.authenticate_by(params.permit(:email_address, :password))
+      start_new_session_for user
+      redirect_to after_authentication_url
+    else
+      redirect_to new_session_path, alert: "Try another email address or password."
+    end
+  end
+
+  def destroy
+    terminate_session
+    redirect_to new_session_path
+  end
+end

app/controllers/subscribers_controller.rb

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+class SubscribersController < ApplicationController
+  allow_unauthenticated_access
+  before_action :set_product
+
+  def create
+    @product.subscribers.where(subscriber_params).first_or_create
+    redirect_to @product, notice: "You are subscribed!"
+  end
+
+  private
+
+    def set_product
+      @product = Product.find(params[:product_id])
+    end
+
+    def subscriber_params
+      params.expect(subscriber: [ :email ])
+    end
+
+end