class Coach::MiddlewareValidator
Attributes
Public Class Methods
Source
# File lib/coach/middleware_validator.rb, line 7 def initialize(middleware, previous_middlewares = [], already_provided = []) @middleware = middleware @previous_middlewares = previous_middlewares.clone @already_provided = already_provided end
Public Instance Methods
Source
# File lib/coach/middleware_validator.rb, line 15 def validated_provides! if missing_requirements.any? raise Coach::Errors::MiddlewareDependencyNotMet.new( @middleware, @previous_middlewares, missing_requirements ) end @middleware.provided + provided_by_chain end
Aggregates provided keys from the given middleware, and all the middleware it uses. Can raise at any level assuming a used middleware is missing a required dependency.
Private Instance Methods
Source
# File lib/coach/middleware_validator.rb, line 43 def middleware_dependencies @middleware_dependencies ||= @middleware.middleware_dependencies.map(&:middleware) end
Source
# File lib/coach/middleware_validator.rb, line 29 def missing_requirements @middleware.requirements - provided_by_chain end
Source
# File lib/coach/middleware_validator.rb, line 33 def provided_by_chain @provided_by_chain ||= begin initial = [@already_provided, @previous_middlewares] middleware_dependencies.reduce(initial) do |(provided, previous), middleware| validator = self.class.new(middleware, previous, provided) [provided + validator.validated_provides!, previous + [middleware]] end.first.flatten.uniq end end