User Service

create_user_service.rb

# service name hints that it does
class CreateUserService
  # default attributes that all services should have
  attr_reader :errors, :messages, :output
  
  # custom attributes for what this service does
  attr_reader :user, :send_email
  
  # we receive all parameters in the initialization
  def initialize(user:, send_email: true)
    @user = user
    @send_email = send_email
  end
  
  def perform
    reinitialize
    @user.token = TokenProvider.generate(@user.email) unless @user.token.present?
    if @user.valid?
      @user.save
      UserMailer.welcome_message(user).deliver if @send_email
      @messages << "User #{user.email} successfully created"
      @output = @user
    else
      @errors << @user.errors.full_messages
    end
    
    @errors.empty?
  end
  
  private
  
  # this just makes sure that each time perform is called the errors and
  # messages are reinitialized
  def reinitialize
    @errors = []
    @messages = []
    @output = nil
  end
end