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require "active_support/notifications"
require "stripe"
require "stripe_event/engine" if defined?(Rails)
module StripeEvent
class << self
attr_accessor :adapter, :backend, :namespace, :event_filter
attr_reader :signing_secrets
def configure(&block)
raise ArgumentError, "must provide a block" unless block_given?
block.arity.zero? ? instance_eval(&block) : yield(self)
end
alias :setup :configure
def instrument(event)
event = event_filter.call(event)
backend.instrument namespace.call(event.type), event if event
end
def subscribe(name, callable = Proc.new)
backend.subscribe namespace.to_regexp(name), adapter.call(callable)
end
def all(callable = Proc.new)
subscribe nil, callable
end
def listening?(name)
namespaced_name = namespace.call(name)
backend.notifier.listening?(namespaced_name)
end
def signing_secret=(value)
@signing_secrets = Array(value)
end
alias signing_secrets= signing_secret=
def signing_secret
self.signing_secrets && self.signing_secrets.first
end
end
class Namespace < Struct.new(:value, :delimiter)
def call(name = nil)
"#{value}#{delimiter}#{name}"
end
def to_regexp(name = nil)
%r{^#{Regexp.escape call(name)}}
end
end
class NotificationAdapter < Struct.new(:subscriber)
def self.call(callable)
new(callable)
end
def call(*args)
payload = args.last
subscriber.call(payload)
end
end
class Error < StandardError; end
class UnauthorizedError < Error; end
self.adapter = NotificationAdapter
self.backend = ActiveSupport::Notifications
self.namespace = Namespace.new("stripe_event", ".")
self.event_filter = lambda { |event| event }
end