Rails 6 with Devise Starter Template

devise_rails_template.rb

# frozen_string_literal: true

# Writing and Reading to files
require 'fileutils'

def add_gems
  gem 'devise'
  gem 'simple_form'
end

def source_paths
  [__dir__]
end

def setup_simple_form
  generate 'simple_form:install --bootstrap'
end

def setup_users
  generate 'devise:install'
  environment "config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }",
              env: 'development'
  generate :devise, 'User', 'username:string:uniq', 'admin:boolean'
  rails_command 'db:migrate'
  generate 'devise:views'

  in_root do
    migration = Dir.glob('db/migrate/*').max_by { |f| File.mtime(f) }
    gsub_file migration, /:admin/, ':admin, default: false'
  end
  inject_into_file 'app/controllers/application_controller.rb', before: 'end' do
    "\n  before_action :configure_permitted_parameters, if: :devise_controller?

    protected
    def configure_permitted_parameters
      added_attrs = %i[username email password password_confirmation remember_me]
      devise_parameter_sanitizer.permit :sign_up, keys: added_attrs
      devise_parameter_sanitizer.permit :account_update, keys: added_attrs
    end\n"
  end

  inject_into_file 'app/models/user.rb', before: 'end' do
    "\n validates :username, presence: true, uniqueness: { case_sensitive: false }
        validate :validate_username
        attr_writer :login

        def login
            @login || username || email
        end

        def validate_username
            errors.add(:username, :invalid) if User.where(email: username).exists?
        end

        def self.find_for_database_authentication(warden_conditions)
            conditions = warden_conditions.dup
            if login = conditions.delete(:login)
                where(conditions.to_hash).where(['lower(username) = :value OR lower(email) = :value', {value: login.downcase}]).first
            elsif conditions.key?(:username) || conditions.key?(:email)
                where(conditions.to_h).first
            end
        end\n"
  end

  inject_into_file 'config/initializers/devise.rb', after: '# config.authentication_keys = [:email]' do
    "\n config.authentication_keys = [:login]\n"
  end

  find_and_replace_in_file('app/views/devise/sessions/new.html.erb', 'email', 'login')

  inject_into_file 'app/views/devise/registrations/new.html.erb', before: '<%= f.input :email' do
    "\n<%= f.input :username %>\n"
  end

  inject_into_file 'app/views/devise/registrations/edit.html.erb', before: '<%= f.input :email' do
    "\n<%= f.input :username %>\n"
  end
end

def find_and_replace_in_file(file_name, old_content, new_content)
  text = File.read(file_name)
  new_contents = text.gsub(old_content, new_content)
  File.open(file_name, 'w') { |file| file.write new_contents }
end

def demo_rails_commands
  generate(:controller, 'pages home')
  route "root to: 'pages#home'"
  rails_command 'g scaffold post title:string body:text --no-scaffold-stylesheet'
  rails_command 'db:migrate'
end

def add_bootstrap
  run 'yarn add bootstrap jquery popper.js'
  inject_into_file 'config/webpack/environment.js', before: 'module.exports = environment' do
    "const webpack = require('webpack')
        environment.plugins.append('Provide',
            new webpack.ProvidePlugin({
                $: 'jquery',
                jQuery: 'jquery',
                Popper: ['popper.js', 'default']
            })
        )\n"
  end
  inject_into_file 'app/javascript/packs/application.js', after: '// const imagePath = (name) => images(name, true)' do
    "\nimport 'bootstrap';
        import './stylesheets/application.scss';\n"
  end
  FileUtils.mkdir_p('app/javascript/packs/stylesheets')
  app_scss = 'app/javascript/packs/stylesheets/application.scss'
  FileUtils.touch(app_scss)
  append_to_file app_scss do
    "\n@import '~bootstrap/scss/bootstrap';\n"
  end
end

def add_bootstrap_navbar
  navbar = 'app/views/layouts/_navbar.html.erb'
  FileUtils.touch(navbar)
  inject_into_file 'app/views/layouts/application.html.erb', before: '<%= yield %>' do
    "\n<%= render 'layouts/navbar' %>\n"
  end

  append_to_file navbar do
    '<nav class="navbar navbar-expand-lg navbar-light bg-light">
        <%= link_to Rails.application.class.parent_name, root_path, class:"navbar-brand" %>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarSupportedContent">
          <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
              <%= link_to "Home", root_path, class:"nav-link" %>
            </li>
            <li class="nav-item">
              <%= link_to "Posts", posts_path, class:"nav-link" %>
            </li>
          </ul>
          <ul class="navbar-nav ml-auto">
            <% if current_user %>
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    <%= current_user.username %>
                </a>
                <div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown">
                    <%= link_to "Account Settings", edit_user_registration_path, class:"dropdown-item" %>
                    <%= link_to "New Post", new_post_path, class:"dropdown-item" %>
                    <div class="dropdown-divider"></div>
                    <%= link_to "Logout", destroy_user_session_path, method: :delete, class:"dropdown-item" %>
                </div>
            </li>
            <% else %>
            <li class="nav-item">
                <%= link_to "Create Account", new_user_registration_path, class:"nav-link" %>
            </li>
            <li class="nav-item">
              <%= link_to "Login", new_user_session_path, class:"nav-link" %>
            </li>
            <% end %>
          </ul>
        </div>
      </nav>'
  end
end

source_paths

add_gems

after_bundle do
  setup_simple_form
  setup_users

#   demo_rails_commands

  add_bootstrap
  add_bootstrap_navbar
end