session_helpers.rb

helpers do

	def login(user)
		session[:id] = user.id
	end

	def logged_in?
		session[:id] != nil
	end

	# ANOTHER APPROACH:
	# current_user.present?
	# !!current_user

	def current_user
		@user ||= User.find(session[:id]) if session[:id]
	end

# ANOTHER APPROACH:
# @current_user ||= User.where(id: session[:id]).first

# clears just that session id
	def logout!
		session[:id] = nil
		redirect '/'
	end
end

# logout versus logout!
# ANOTHER APPROACH TO LOGOUT!:

		# session.delete(:user_id)
		# clears EVERYTHING
		# session.clear