class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
  after_action :flash_to_http_header

  if (Rails.env.development? || Rails.env.test?)
    # https://github.com/RailsApps/rails-devise-pundit/issues/10
    include Pundit
    # https://github.com/elabs/pundit#ensuring-policies-are-used
    #after_action :verify_authorized,  except: :index
    #after_action :verify_policy_scoped, only: :index

    rescue_from Pundit::NotAuthorizedError, with: :user_not_authorized

    private

    def user_not_authorized
      flash[:alert] = 'Access denied.'
      redirect_to (request.referrer || root_path)
    end
  end

  def authenticate_user!(args = nil)
    current_user.present?
  end

  def current_user
    super || User.where(soft_token: soft_token).first_or_initialize
  end

  private

  def flash_to_http_header
    return unless request.xhr?
    return if flash.empty?
    response.headers['X-FlashMessages'] = flash.to_hash.to_json
    flash.discard  # don't want the flash to appear when you reload page
  end

  def soft_token
    session[:user_token] ||= SecureRandom.hex(8)
  end

end