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# frozen_string_literal: true
require "time"
module ActiveSupport
module Messages #:nodoc:
class Metadata #:nodoc:
def initialize(message, expires_at = nil, purpose = nil)
@message, @expires_at, @purpose = message, expires_at, purpose
end
def as_json(options = {})
{ _rails: { message: @message, exp: @expires_at, pur: @purpose } }
end
class << self
def wrap(message, expires_at: nil, expires_in: nil, purpose: nil)
if expires_at || expires_in || purpose
JSON.encode new(encode(message), pick_expiry(expires_at, expires_in), purpose)
else
message
end
end
def verify(message, purpose)
extract_metadata(message).verify(purpose)
end
private
def pick_expiry(expires_at, expires_in)
if expires_at
expires_at.utc.iso8601(3)
elsif expires_in
Time.now.utc.advance(seconds: expires_in).iso8601(3)
end
end
def extract_metadata(message)
data = JSON.decode(message) rescue nil
if data.is_a?(Hash) && data.key?("_rails")
new(decode(data["_rails"]["message"]), data["_rails"]["exp"], data["_rails"]["pur"])
else
new(message)
end
end
def encode(message)
::Base64.strict_encode64(message)
end
def decode(message)
::Base64.strict_decode64(message)
end
end
def verify(purpose)
@message if match?(purpose) && fresh?
end
private
def match?(purpose)
@purpose.to_s == purpose.to_s
end
def fresh?
@expires_at.nil? || Time.now.utc < Time.iso8601(@expires_at)
end
end
end
end
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