Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
@@ -32,12 +34,14 @@ gem 'jquery-rails'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.4.4', require: false
 
+gem 'rubocop', require: false
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
-  gem 'rspec'
-  gem 'rspec-rails', ">= 2.0.0.beta"
   gem 'rails-controller-testing'
+  gem 'rspec'
+  gem 'rspec-rails', '>= 2.0.0.beta'
 end
 
 group :development do
@@ -45,8 +49,8 @@ group :development do
   gem 'web-console', '>= 4.1.0'
   # Display performance information such as SQL time and flame graphs for each request in your browser.
   # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
-  gem 'rack-mini-profiler', '~> 2.0'
   gem 'listen', '~> 3.3'
+  gem 'rack-mini-profiler', '~> 2.0'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
 end
@@ -60,4 +64,4 @@ group :test do
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]

Gemfile.lock

@@ -62,6 +62,7 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
+    ast (2.4.2)
     autoprefixer-rails (10.2.4.0)
       execjs
     bcrypt (3.1.16)
@@ -117,6 +118,9 @@ GEM
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
+    parallel (1.20.1)
+    parser (3.0.0.0)
+      ast (~> 2.4.1)
     public_suffix (4.0.6)
     puma (5.2.2)
       nio4r (~> 2.0)
@@ -158,11 +162,13 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (~> 1.0)
+    rainbow (3.0.0)
     rake (13.0.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.1.1)
+    rexml (3.2.4)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -184,6 +190,18 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.10.2)
+    rubocop (1.11.0)
+      parallel (~> 1.10)
+      parser (>= 3.0.0.0)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml
+      rubocop-ast (>= 1.2.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.4.1)
+      parser (>= 2.7.1.5)
+    ruby-progressbar (1.11.0)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -215,6 +233,7 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
+    unicode-display_width (2.0.0)
     web-console (4.1.0)
       actionview (>= 6.0.0)
       activemodel (>= 6.0.0)
@@ -254,6 +273,7 @@ DEPENDENCIES
   rails-controller-testing
   rspec
   rspec-rails (>= 2.0.0.beta)
+  rubocop
   sass-rails (>= 6)
   selenium-webdriver
   spring

Rakefile

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require_relative "config/application"
+require_relative 'config/application'
 
 Rails.application.load_tasks

app/channels/application_cable/channel.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end

app/channels/application_cable/connection.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end

app/controllers/application_controller.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+
+# Base for application controllers
 class ApplicationController < ActionController::Base
   helper_method :current_user
   helper_method :logged_in?
@@ -13,15 +16,13 @@ class ApplicationController < ActionController::Base
   protected
 
   def notices_from_errors(record)
-    messages = record.errors.messages.map do |attribute, messages|
+    errors = record.errors.messages.map do |attribute, messages|
       messages.map { |message| "#{attribute} #{message}".capitalize }
     end
-    messages.flatten
+    errors.flatten
   end
 
   def ensure_admin
-    unless current_user&.admin?
+    redirect_to '/welcome', notice: 'You are not allowed to perform this action' unless current_user&.admin?
-      redirect_to '/welcome', notice: 'You are not allowed to perform this action'
-    end
   end
 end

app/controllers/authors_controller.rb

@@ -1,6 +1,9 @@
+# frozen_string_literal: true
+
+# Authors controller
 class AuthorsController < ApplicationController
   before_action :ensure_admin
-  before_action :set_author, only: [:edit, :update]
+  before_action :set_author, only: %i[edit update]
 
   def index
     @authors = Author.all
@@ -11,9 +14,7 @@ class AuthorsController < ApplicationController
   end
 
   def update
-    if @author.update(author_params)
+    redirect_to '/authors' if @author.update(author_params)
-      redirect_to '/authors'
-    end
   end
 
   private

app/controllers/books_controller.rb

@@ -1,26 +1,25 @@
+# frozen_string_literal: true
+
+# Books controller
 class BooksController < ApplicationController
-  before_action :set_book, only: [:show, :edit, :update, :add_to_cart]
+  before_action :set_book, only: %i[show edit update add_to_cart]
-  before_action :ensure_admin, only: [:edit, :update]
+  before_action :ensure_admin, only: %i[edit update]
 
   def index
-    if current_user&.admin?
+    books = if current_user&.admin?
-      books = Book.all
+              Book.all
             else
-      books = Book.published
+              Book.published
             end
     @books = books.map { |book| BooksPresenter.new(book) }
   end
 
-  def show
+  def show; end
-  end
 
-  def edit
+  def edit; end
-  end
 
   def update
-    if @book.update(book_params)
+    redirect_to '/books' if @book.update(book_params)
-      redirect_to '/books'
-    end
   end
 
   def add_to_cart

app/controllers/sessions_controller.rb

@@ -1,30 +1,36 @@
+# frozen_string_literal: true
+
+# Sessions controller
 class SessionsController < ApplicationController
-  def new
+  def new; end
-  end
 
   def create
     @user = User.find_by(email: params[:email])
-    unless @user
+    problem = problem_with_login
-      redirect_to '/welcome', notice: 'Wrong email address'
+    if problem
-      return
+      redirect_to '/welcome', notice: problem
-    end
+    else
-    unless @user.authenticate(params[:password])
-      redirect_to '/welcome', notice: 'Wrong password'
-      return
-    end
-    if @user.blocked?
-      redirect_to '/welcome', notice: 'You are blocked, please contact support'
-      return
-    end
       session[:user_id] = @user.id
       redirect_to '/welcome'
     end
+  end
 
   def delete
     session.delete(:user_id)
     redirect_to '/welcome', notice: 'Logged out properly'
   end
 
-  def welcome
+  def welcome; end
+
+  private
+
+  def problem_with_login
+    if !@user
+      'Wrong email address'
+    elsif !@user.authenticate(params[:password])
+      'Wrong password'
+    elsif @user.blocked?
+      'You are blocked, please contact support'
+    end
   end
 end

app/controllers/users_controller.rb

@@ -1,5 +1,8 @@
+# frozen_string_literal: true
+
+# Users controller
 class UsersController < ApplicationController
-  before_action :ensure_admin, only: [:destroy, :block]
+  before_action :ensure_admin, only: %i[destroy block]
 
   def index
     @users = User.all
@@ -21,15 +24,14 @@ class UsersController < ApplicationController
 
   def password_recovery_request
     @user = User.where(email: params['email']).first
-    recovery_password = ('a'..'z').to_a.shuffle[0,8].join
+    recovery_password = ('a'..'z').to_a.sample(8).join
     @user.recovery_password = recovery_password
     @user.save
     UserMailer.with(user: @user, recovery_password: recovery_password).password_recovery.deliver_now
     redirect_to '/welcome', notice: "Recovery email sent to #{params['email']}"
   end
 
-  def password_recovery_request_form
+  def password_recovery_request_form; end
-  end
 
   def recover_password_form
     @recovery_password = params[:recovery_password]

app/helpers/application_helper.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
 end

app/helpers/books_helper.rb

@@ -1,7 +1,10 @@
+# frozen_string_literal: true
+
 module BooksHelper
   def cart_summary
-    number_to_currency(@books.map{ |b| b.price }.reduce(:+))
+    number_to_currency(@books.map(&:price).reduce(:+))
   end
+
   def can_book_be_added?(book)
     logged_in? && book.quantity.positive? && !current_user.books.exists?(book.id)
   end

app/helpers/sessions_helper.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module SessionsHelper
 end

app/helpers/users_helper.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module UsersHelper
 end

app/jobs/application_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
   # Automatically retry jobs that encountered a deadlock
   # retry_on ActiveRecord::Deadlocked

app/mailers/application_mailer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationMailer < ActionMailer::Base
   default from: 'from@example.com'
   layout 'mailer'

app/mailers/user_mailer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UserMailer < ApplicationMailer
   def password_recovery
     @user = params[:user]

app/models/application_record.rb

@@ -1,23 +1,28 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
   def update(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'update', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'update', params: to_json)
     result
   end
+
   def save(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'save', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'save', params: to_json)
     result
   end
+
   def self.create(*args)
     result = super(*args)
     AuditRecord.create(model: self.class, action: 'create', params: result.to_json)
     result
   end
+
   def decrement!(*args)
     result = super(*args)
-    AuditRecord.create(model: self.class, action: 'decrement!', params: self.to_json)
+    AuditRecord.create(model: self.class, action: 'decrement!', params: to_json)
     result
   end
 end

app/models/audit_record.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class AuditRecord < ActiveRecord::Base
 end

app/models/author.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Author < ApplicationRecord
   validates :first_name, presence: true
   validates :last_name, presence: true

app/models/book.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Book < ApplicationRecord
   has_and_belongs_to_many :authors
 

app/models/user.rb

@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 class User < ApplicationRecord
   has_and_belongs_to_many :books
 
   has_secure_password
   has_secure_password :recovery_password, validations: false
-  enum role: [:customer, :admin], _default: :customer
+  enum role: %i[customer admin], _default: :customer
-  enum status: [:ready, :blocked], _default: :ready
+  enum status: %i[ready blocked], _default: :ready
 
   validates :email, presence: true, uniqueness: true, format: { with: URI::MailTo::EMAIL_REGEXP }
   validates :role, presence: true
@@ -12,6 +14,6 @@ class User < ApplicationRecord
   validates :password, {
     presence: true,
     length: { minimum: 8 },
-    if: lambda{ new_record? || !password.nil? }
+    if: -> { new_record? || !password.nil? }
   }
 end

app/presenters/books_presenter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BooksPresenter < SimpleDelegator
   include ActiveSupport::NumberHelper
 

bin/bundle

@@ -8,46 +8,46 @@
 # this file is here to facilitate running it.
 #
 
-require "rubygems"
+require 'rubygems'
 
 m = Module.new do
   module_function
 
   def invoked_as_script?
-    File.expand_path($0) == File.expand_path(__FILE__)
+    File.expand_path($PROGRAM_NAME) == File.expand_path(__FILE__)
   end
 
   def env_var_version
-    ENV["BUNDLER_VERSION"]
+    ENV['BUNDLER_VERSION']
   end
 
   def cli_arg_version
     return unless invoked_as_script? # don't want to hijack other binstubs
-    return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`
+    return unless 'update'.start_with?(ARGV.first || ' ') # must be running `bundle update`
+
     bundler_version = nil
     update_index = nil
     ARGV.each_with_index do |a, i|
-      if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
+      bundler_version = a if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
-        bundler_version = a
-      end
       next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
-      bundler_version = $1
+
+      bundler_version = Regexp.last_match(1)
       update_index = i
     end
     bundler_version
   end
 
   def gemfile
-    gemfile = ENV["BUNDLE_GEMFILE"]
+    gemfile = ENV['BUNDLE_GEMFILE']
     return gemfile if gemfile && !gemfile.empty?
 
-    File.expand_path("../../Gemfile", __FILE__)
+    File.expand_path('../Gemfile', __dir__)
   end
 
   def lockfile
     lockfile =
       case File.basename(gemfile)
-      when "gems.rb" then gemfile.sub(/\.rb$/, gemfile)
+      when 'gems.rb' then gemfile.sub(/\.rb$/, gemfile)
       else "#{gemfile}.lock"
       end
     File.expand_path(lockfile)
@@ -55,8 +55,10 @@ m = Module.new do
 
   def lockfile_version
     return unless File.file?(lockfile)
+
     lockfile_contents = File.read(lockfile)
     return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
+
     Regexp.last_match(1)
   end
 
@@ -73,28 +75,32 @@ m = Module.new do
 
     requirement = bundler_gem_version.approximate_recommendation
 
-    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new("2.7.0")
+    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new('2.7.0')
 
-    requirement += ".a" if bundler_gem_version.prerelease?
+    requirement += '.a' if bundler_gem_version.prerelease?
 
     requirement
   end
 
   def load_bundler!
-    ENV["BUNDLE_GEMFILE"] ||= gemfile
+    ENV['BUNDLE_GEMFILE'] ||= gemfile
 
     activate_bundler
   end
 
   def activate_bundler
     gem_error = activation_error_handling do
-      gem "bundler", bundler_requirement
+      gem 'bundler', bundler_requirement
     end
     return if gem_error.nil?
+
     require_error = activation_error_handling do
-      require "bundler/version"
+      require 'bundler/version'
     end
-    return if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+    if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+      return
+    end
+
     warn "Activating bundler (#{bundler_requirement}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_requirement}'`"
     exit 42
   end
@@ -109,6 +115,4 @@ end
 
 m.load_bundler!
 
-if m.invoked_as_script?
+load Gem.bin_path('bundler', 'bundle') if m.invoked_as_script?
-  load Gem.bin_path("bundler", "bundle")
-end

bin/rails

@@ -1,5 +1,7 @@
 #!/usr/bin/env ruby
-load File.expand_path("spring", __dir__)
+# frozen_string_literal: true
+
+load File.expand_path('spring', __dir__)
 APP_PATH = File.expand_path('../config/application', __dir__)
-require_relative "../config/boot"
+require_relative '../config/boot'
-require "rails/commands"
+require 'rails/commands'

bin/rake

@@ -1,5 +1,7 @@
 #!/usr/bin/env ruby
-load File.expand_path("spring", __dir__)
+# frozen_string_literal: true
-require_relative "../config/boot"
+
-require "rake"
+load File.expand_path('spring', __dir__)
+require_relative '../config/boot'
+require 'rake'
 Rake.application.run

bin/setup

@@ -1,5 +1,7 @@
 #!/usr/bin/env ruby
-require "fileutils"
+# frozen_string_literal: true
+
+require 'fileutils'
 
 # path to your application root.
 APP_ROOT = File.expand_path('..', __dir__)

bin/spring

@@ -1,13 +1,15 @@
 #!/usr/bin/env ruby
-if !defined?(Spring) && [nil, "development", "test"].include?(ENV["RAILS_ENV"])
+# frozen_string_literal: true
-  gem "bundler"
+
-  require "bundler"
+if !defined?(Spring) && [nil, 'development', 'test'].include?(ENV['RAILS_ENV'])
+  gem 'bundler'
+  require 'bundler'
 
   # Load Spring without loading other gems in the Gemfile, for speed.
-  Bundler.locked_gems&.specs&.find { |spec| spec.name == "spring" }&.tap do |spring|
+  Bundler.locked_gems&.specs&.find { |spec| spec.name == 'spring' }&.tap do |spring|
     Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
-    gem "spring", spring.version
+    gem 'spring', spring.version
-    require "spring/binstub"
+    require 'spring/binstub'
   rescue Gem::LoadError
     # Ignore when Spring is not installed.
   end

bin/webpack

@@ -1,18 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
-ENV["NODE_ENV"]  ||= "development"
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
+require 'pathname'
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
                                            Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
+require 'webpacker'
-require "webpacker/webpack_runner"
+require 'webpacker/webpack_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::WebpackRunner.run(ARGV)
 end

bin/webpack-dev-server

@@ -1,18 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
-ENV["NODE_ENV"]  ||= "development"
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
+require 'pathname'
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
                                            Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
+require 'webpacker'
-require "webpacker/dev_server_runner"
+require 'webpacker/dev_server_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::DevServerRunner.run(ARGV)
 end

bin/yarn

@@ -1,17 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
-  yarn = ENV["PATH"].split(File::PATH_SEPARATOR).
+  yarn = ENV['PATH'].split(File::PATH_SEPARATOR)
-    select { |dir| File.expand_path(dir) != __dir__ }.
+                    .reject { |dir| File.expand_path(dir) == __dir__ }
-    product(["yarn", "yarn.cmd", "yarn.ps1"]).
+                    .product(['yarn', 'yarn.cmd', 'yarn.ps1'])
-    map { |dir, file| File.expand_path(file, dir) }.
+                    .map { |dir, file| File.expand_path(file, dir) }
-    find { |file| File.executable?(file) }
+                    .find { |file| File.executable?(file) }
 
   if yarn
     exec yarn, *ARGV
   else
-    $stderr.puts "Yarn executable was not detected in the system."
+    warn 'Yarn executable was not detected in the system.'
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
+    warn 'Download Yarn at https://yarnpkg.com/en/docs/install'
     exit 1
   end
 end

config.ru

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
-require_relative "config/environment"
+require_relative 'config/environment'
 
 run Rails.application
 Rails.application.load_server

config/application.rb

@@ -1,6 +1,8 @@
-require_relative "boot"
+# frozen_string_literal: true
 
-require "rails/all"
+require_relative 'boot'
+
+require 'rails/all'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.

config/boot.rb

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
-require "bundler/setup" # Set up gems listed in the Gemfile.
+require 'bundler/setup' # Set up gems listed in the Gemfile.
-require "bootsnap/setup" # Speed up boot time by caching expensive operations.
+require 'bootsnap/setup' # Speed up boot time by caching expensive operations.

config/environment.rb

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 # Load the Rails application.
-require_relative "application"
+require_relative 'application'
 
 # Initialize the Rails application.
 Rails.application.initialize!

config/environments/development.rb

@@ -1,4 +1,6 @@
-require "active_support/core_ext/integer/time"
+# frozen_string_literal: true
+
+require 'active_support/core_ext/integer/time'
 
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.

config/environments/production.rb

@@ -1,4 +1,6 @@
-require "active_support/core_ext/integer/time"
+# frozen_string_literal: true
+
+require 'active_support/core_ext/integer/time'
 
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
@@ -88,8 +90,8 @@ Rails.application.configure do
   # require "syslog/logger"
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
 
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
+  if ENV['RAILS_LOG_TO_STDOUT'].present?
-    logger           = ActiveSupport::Logger.new(STDOUT)
+    logger           = ActiveSupport::Logger.new($stdout)
     logger.formatter = config.log_formatter
     config.logger    = ActiveSupport::TaggedLogging.new(logger)
   end

config/environments/test.rb

@@ -1,4 +1,6 @@
-require "active_support/core_ext/integer/time"
+# frozen_string_literal: true
+
+require 'active_support/core_ext/integer/time'
 
 # The test environment is used exclusively to run your application's
 # test suite. You never need to work with it otherwise. Remember that

config/initializers/application_controller_renderer.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # ActiveSupport::Reloader.to_prepare do

config/initializers/assets.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.

config/initializers/backtrace_silencers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
@@ -5,4 +7,4 @@
 
 # You can also remove all the silencers if you're trying to debug a problem that might stem from framework code
 # by setting BACKTRACE=1 before calling your invocation, like "BACKTRACE=1 ./bin/rails runner 'MyClass.perform'".
-Rails.backtrace_cleaner.remove_silencers! if ENV["BACKTRACE"]
+Rails.backtrace_cleaner.remove_silencers! if ENV['BACKTRACE']

config/initializers/content_security_policy.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy

config/initializers/cookies_serializer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Specify a serializer for the signed and encrypted cookie jars.

config/initializers/filter_parameter_logging.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
-Rails.application.config.filter_parameters += [
+Rails.application.config.filter_parameters += %i[
-  :passw, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn
+  passw secret token _key crypt salt certificate otp ssn
 ]

config/initializers/inflections.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections

config/initializers/mime_types.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new mime types for use in respond_to blocks:

config/initializers/permissions_policy.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Define an application-wide HTTP permissions policy. For further
 # information see https://developers.google.com/web/updates/2018/06/feature-policy
 #

config/initializers/wrap_parameters.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # This file contains settings for ActionController::ParamsWrapper which

config/puma.rb

@@ -1,28 +1,30 @@
+# frozen_string_literal: true
+
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers: a minimum and maximum.
 # Any libraries that use thread pools should be configured to match
 # the maximum value specified for Puma. Default is set to 5 threads for minimum
 # and maximum; this matches the default thread size of Active Record.
 #
-max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
+max_threads_count = ENV.fetch('RAILS_MAX_THREADS', 5)
-min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
+min_threads_count = ENV.fetch('RAILS_MIN_THREADS') { max_threads_count }
 threads min_threads_count, max_threads_count
 
 # Specifies the `worker_timeout` threshold that Puma will use to wait before
 # terminating a worker in development environments.
 #
-worker_timeout 3600 if ENV.fetch("RAILS_ENV", "development") == "development"
+worker_timeout 3600 if ENV.fetch('RAILS_ENV', 'development') == 'development'
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
-port ENV.fetch("PORT") { 3000 }
+port ENV.fetch('PORT', 3000)
 
 # Specifies the `environment` that Puma will run in.
 #
-environment ENV.fetch("RAILS_ENV") { "development" }
+environment ENV.fetch('RAILS_ENV', 'development')
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+pidfile ENV.fetch('PIDFILE', 'tmp/pids/server.pid')
 
 # Specifies the number of `workers` to boot in clustered mode.
 # Workers are forked web server processes. If using threads and workers together

config/routes.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   resources :users
   get 'login', to: 'sessions#new'

config/spring.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 Spring.watch(
-  ".ruby-version",
+  '.ruby-version',
-  ".rbenv-vars",
+  '.rbenv-vars',
-  "tmp/restart.txt",
+  'tmp/restart.txt',
-  "tmp/caching-dev.txt"
+  'tmp/caching-dev.txt'
 )

db/migrate/20210319142051_create_authors.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateAuthors < ActiveRecord::Migration[6.1]
   def change
     create_table :authors do |t|
@@ -7,6 +9,6 @@ class CreateAuthors < ActiveRecord::Migration[6.1]
       t.timestamps
     end
 
-    add_index :authors, [ :first_name, :last_name ]
+    add_index :authors, %i[first_name last_name]
   end
 end

db/migrate/20210319142054_create_books.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateBooks < ActiveRecord::Migration[6.1]
   def change
     create_table :books do |t|

db/migrate/20210319142059_create_authors_books.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateAuthorsBooks < ActiveRecord::Migration[6.1]
   def change
     create_table :authors_books do |t|

db/migrate/20210320130542_create_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateUsers < ActiveRecord::Migration[6.1]
   def change
     create_table :users do |t|

db/migrate/20210320212922_change_username_to_email.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ChangeUsernameToEmail < ActiveRecord::Migration[6.1]
   def change
     rename_column :users, :username, :email

db/migrate/20210320233401_add_password_recovery_code_to_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddPasswordRecoveryCodeToUsers < ActiveRecord::Migration[6.1]
   def change
     add_column :users, :password_recovery_code, :string

db/migrate/20210321093857_change_password_recovery_code_to_recovery_password_digest.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ChangePasswordRecoveryCodeToRecoveryPasswordDigest < ActiveRecord::Migration[6.1]
   def change
     rename_column :users, :password_recovery_code, :recovery_password_digest

db/migrate/20210321135711_add_role_to_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddRoleToUsers < ActiveRecord::Migration[6.1]
   def change
     add_column :users, :role, :integer

db/migrate/20210321213901_add_status_to_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddStatusToUsers < ActiveRecord::Migration[6.1]
   def change
     add_column :users, :status, :integer

db/migrate/20210321225317_create_audit_records.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateAuditRecords < ActiveRecord::Migration[6.1]
   def change
     create_table :audit_records do |t|

db/migrate/20210321235625_add_quantity_to_books.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddQuantityToBooks < ActiveRecord::Migration[6.1]
   def change
     add_column :books, :quantity, :integer

db/migrate/20210322002803_create_books_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateBooksUsers < ActiveRecord::Migration[6.1]
   def change
     create_table :books_users do |t|

db/schema.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
@@ -10,60 +12,58 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_03_22_002803) do
+ActiveRecord::Schema.define(version: 20_210_322_002_803) do
-
+  create_table 'audit_records', force: :cascade do |t|
-  create_table "audit_records", force: :cascade do |t|
+    t.string 'model'
-    t.string "model"
+    t.string 'action'
-    t.string "action"
+    t.string 'params'
-    t.string "params"
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "authors", force: :cascade do |t|
+  create_table 'authors', force: :cascade do |t|
-    t.string "first_name"
+    t.string 'first_name'
-    t.string "last_name"
+    t.string 'last_name'
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.index ["first_name", "last_name"], name: "index_authors_on_first_name_and_last_name"
+    t.index %w[first_name last_name], name: 'index_authors_on_first_name_and_last_name'
   end
 
-  create_table "authors_books", force: :cascade do |t|
+  create_table 'authors_books', force: :cascade do |t|
-    t.integer "book_id"
+    t.integer 'book_id'
-    t.integer "author_id"
+    t.integer 'author_id'
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.index ["author_id"], name: "index_authors_books_on_author_id"
+    t.index ['author_id'], name: 'index_authors_books_on_author_id'
-    t.index ["book_id"], name: "index_authors_books_on_book_id"
+    t.index ['book_id'], name: 'index_authors_books_on_book_id'
   end
 
-  create_table "books", force: :cascade do |t|
+  create_table 'books', force: :cascade do |t|
-    t.string "title"
+    t.string 'title'
-    t.decimal "price", precision: 10, scale: 2
+    t.decimal 'price', precision: 10, scale: 2
-    t.boolean "published"
+    t.boolean 'published'
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.integer "quantity"
+    t.integer 'quantity'
-    t.index ["published"], name: "index_books_on_published"
+    t.index ['published'], name: 'index_books_on_published'
   end
 
-  create_table "books_users", force: :cascade do |t|
+  create_table 'books_users', force: :cascade do |t|
-    t.integer "book_id"
+    t.integer 'book_id'
-    t.integer "user_id"
+    t.integer 'user_id'
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.index ["book_id"], name: "index_books_users_on_book_id"
+    t.index ['book_id'], name: 'index_books_users_on_book_id'
-    t.index ["user_id"], name: "index_books_users_on_user_id"
+    t.index ['user_id'], name: 'index_books_users_on_user_id'
   end
 
-  create_table "users", force: :cascade do |t|
+  create_table 'users', force: :cascade do |t|
-    t.string "email"
+    t.string 'email'
-    t.string "password_digest"
+    t.string 'password_digest'
-    t.datetime "created_at", precision: 6, null: false
+    t.datetime 'created_at', precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
-    t.string "recovery_password_digest"
+    t.string 'recovery_password_digest'
-    t.integer "role"
+    t.integer 'role'
-    t.integer "status"
+    t.integer 'status'
   end
-
 end

db/seeds.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 books = Book.create([
                       {
                         title: 'Journey to the Center of the Earth',
-    price: 10900,
+                        price: 10_900,
                         published: true,
                         quantity: 100
                       },
@@ -22,7 +24,7 @@ books = Book.create([
                         price: 3700,
                         published: true,
                         quantity: 5
-  },
+                      }
                     ])
 
 authors = Author.create([
@@ -32,7 +34,7 @@ authors = Author.create([
                           },
                           {
                             first_name: 'Dick',
-    last_name: 'Pick',
+                            last_name: 'Pick'
                           },
                           {
                             first_name: 'Rick',
@@ -41,7 +43,7 @@ authors = Author.create([
                           {
                             first_name: 'Alan',
                             last_name: 'Milne'
-  },
+                          }
                         ])
 
 books.first.authors << authors.first
@@ -68,5 +70,5 @@ User.create([
                 password: 'aaaaaaaa',
                 role: :customer,
                 status: :ready
-  },
+              }
             ])

spec/controllers/application_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe ApplicationController do

spec/controllers/sessions_controller_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe SessionsController do
@@ -8,14 +10,14 @@ RSpec.describe SessionsController do
     end
   end
   describe 'get create' do
-    # TODO test session status
+    # TODO: test session status
     subject { get 'create' }
     it 'redirects to /welcome' do
       expect(subject).to redirect_to('/welcome')
     end
   end
   describe 'get delete' do
-    # TODO test session status
+    # TODO: test session status
     subject { get 'delete' }
     it 'redirects to /welcome' do
       expect(subject).to redirect_to('/welcome')

spec/controllers/users_controller_spec.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe UsersController do
-  before(:all) do # TODO change it to cleanup after each test
+  before(:all) do # TODO: change it to cleanup after each test
     User.destroy_all
   end
   let(:user1) do
@@ -40,7 +42,7 @@ RSpec.describe UsersController do
       srand(10)
       subject
       email_text = ActionMailer::Base.deliveries.last.body.raw_source
-      expect(email_text).to match("recover_password/#{user1.id}/tfohbclx")
+      expect(email_text).to match("recover_password/#{user1.id}/jeravuxl")
     end
     it 'sends a recovery email to the proper email' do
       subject

spec/mailers/previews/user_mailer_preview.rb

@@ -1,4 +1,5 @@
+# frozen_string_literal: true
+
 # Preview all emails at http://localhost:3000/rails/mailers/user
 class UserMailerPreview < ActionMailer::Preview
-
 end

spec/mailers/user_mailer_spec.rb

@@ -1,4 +1,6 @@
-require "rails_helper"
+# frozen_string_literal: true
+
+require 'rails_helper'
 
 RSpec.describe UserMailer, type: :mailer do
   # TODO

spec/rails_helper.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 # This file is copied to spec/ when you run 'rails generate rspec:install'
 require 'spec_helper'
 ENV['RAILS_ENV'] ||= 'test'
 require File.expand_path('../config/environment', __dir__)
 # Prevent database truncation if the environment is production
-abort("The Rails environment is running in production mode!") if Rails.env.production?
+abort('The Rails environment is running in production mode!') if Rails.env.production?
 require 'rspec/rails'
 # Add additional requires below this line. Rails is not loaded until this point!
 

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by the `rails generate rspec:install` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause
@@ -46,51 +48,49 @@ RSpec.configure do |config|
 
   # The settings below are suggested to provide a good initial experience
   # with RSpec, but feel free to customize to your heart's content.
-=begin
+  #   # This allows you to limit a spec run to individual examples or groups
-  # This allows you to limit a spec run to individual examples or groups
+  #   # you care about by tagging them with `:focus` metadata. When nothing
-  # you care about by tagging them with `:focus` metadata. When nothing
+  #   # is tagged with `:focus`, all examples get run. RSpec also provides
-  # is tagged with `:focus`, all examples get run. RSpec also provides
+  #   # aliases for `it`, `describe`, and `context` that include `:focus`
-  # aliases for `it`, `describe`, and `context` that include `:focus`
+  #   # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
-  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  #   config.filter_run_when_matching :focus
-  config.filter_run_when_matching :focus
+  #
-
+  #   # Allows RSpec to persist some state between runs in order to support
-  # Allows RSpec to persist some state between runs in order to support
+  #   # the `--only-failures` and `--next-failure` CLI options. We recommend
-  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  #   # you configure your source control system to ignore this file.
-  # you configure your source control system to ignore this file.
+  #   config.example_status_persistence_file_path = "spec/examples.txt"
-  config.example_status_persistence_file_path = "spec/examples.txt"
+  #
-
+  #   # Limits the available syntax to the non-monkey patched syntax that is
-  # Limits the available syntax to the non-monkey patched syntax that is
+  #   # recommended. For more details, see:
-  # recommended. For more details, see:
+  #   #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
-  #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
+  #   #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
-  #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+  #   #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
-  #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
+  #   config.disable_monkey_patching!
-  config.disable_monkey_patching!
+  #
-
+  #   # Many RSpec users commonly either run the entire suite or an individual
-  # Many RSpec users commonly either run the entire suite or an individual
+  #   # file, and it's useful to allow more verbose output when running an
-  # file, and it's useful to allow more verbose output when running an
+  #   # individual spec file.
-  # individual spec file.
+  #   if config.files_to_run.one?
-  if config.files_to_run.one?
+  #     # Use the documentation formatter for detailed output,
-    # Use the documentation formatter for detailed output,
+  #     # unless a formatter has already been configured
-    # unless a formatter has already been configured
+  #     # (e.g. via a command-line flag).
-    # (e.g. via a command-line flag).
+  #     config.default_formatter = "doc"
-    config.default_formatter = "doc"
+  #   end
-  end
+  #
-
+  #   # Print the 10 slowest examples and example groups at the
-  # Print the 10 slowest examples and example groups at the
+  #   # end of the spec run, to help surface which specs are running
-  # end of the spec run, to help surface which specs are running
+  #   # particularly slow.
-  # particularly slow.
+  #   config.profile_examples = 10
-  config.profile_examples = 10
+  #
-
+  #   # Run specs in random order to surface order dependencies. If you find an
-  # Run specs in random order to surface order dependencies. If you find an
+  #   # order dependency and want to debug it, you can fix the order by providing
-  # order dependency and want to debug it, you can fix the order by providing
+  #   # the seed, which is printed after each run.
-  # the seed, which is printed after each run.
+  #   #     --seed 1234
-  #     --seed 1234
+  #   config.order = :random
-  config.order = :random
+  #
-
+  #   # Seed global randomization in this process using the `--seed` CLI option.
-  # Seed global randomization in this process using the `--seed` CLI option.
+  #   # Setting this allows you to use `--seed` to deterministically reproduce
-  # Setting this allows you to use `--seed` to deterministically reproduce
+  #   # test failures related to randomization by passing the same `--seed` value
-  # test failures related to randomization by passing the same `--seed` value
+  #   # as the one that triggered the failure.
-  # as the one that triggered the failure.
+  #   Kernel.srand config.seed
-  Kernel.srand config.seed
-=end
 end