leesmith/decent_authentication

class AuthenticateUser
  attr_reader :flash, :user

  def initialize(params)
    @params = params
    @authenticated = false
    @flash = nil
  end

  def call
    if authentication_successful?
      @authenticated = true
      @flash = "Welcome back, #{@user.name}!"
    elsif @user.nil? || @user.enabled?
      @flash = "The email or password you entered was not recognized. Please try again!"
    elsif !@user.enabled?
      @flash = "Your account has been disabled!"
    end
    self
  end

  def success?
    @authenticated
  end

  private

  def authentication_successful?
    @user = User.find_by(email: @params[:email].downcase)
    @user&.authenticate(@params[:password]) && @user&.enabled?
  end
end