ExpiredToken (to do gem)

	#Quick and easy expired token based on date
	#author: Yannis Kolovos
	class ExpiredToken
	attr_accessor :expire
	def initialize(expire = 0.seconds.from_now)
	raise if not expire.acts_like?(:time)
	@expire = expire
	end
	def token
	Base64.urlsafe_encode64(expire.to_s)
	end
	def self.parse(token)
	Time.zone.parse(Base64.urlsafe_decode64(token))
	end
	def valid?
	expire.future?
	end
	def expired?
	expire.past?
	end
	end
	# Example:
	# make a new client ExpiredToken
	# client_token = ExpiredToken.new(10.seconds.from_now)
	# client_token = ExpiredToken.new(Emm::Application.config.pdf_server_token_expires_at)
	# make a new server ExpiredToken to validate client
	# server_validation = ExpiredToken.new(ExpiredToken.parse(client_token.token))
	#
	# validations:
	# server_validation.valid?
	# see it change
	# loop do
	# p server_validation.valid?
	# sleep 1
	# end

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