Class: Webmidi::Middleware::Stack

Inherits:
Object
  • Object
show all
Defined in:
lib/webmidi/middleware/stack.rb

Defined Under Namespace

Classes: LambdaMiddleware

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ Stack

Returns a new instance of Stack.



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# File 'lib/webmidi/middleware/stack.rb', line 6

def initialize(&block)
  @middlewares = []
  @app_cache = nil
  instance_eval(&block) if block
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/webmidi/middleware/stack.rb', line 22

def build
  return @app_cache if @app_cache

  endpoint = ->(msg) { msg }
  @middlewares.reverse_each do |middleware, options|
    current_app = endpoint
    endpoint = if middleware.is_a?(Proc)
      lambda_adapter(middleware, current_app)
    else
      middleware.new(current_app, **options)
    end
  end
  @app_cache = endpoint
end

#call(message) ⇒ Object 



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# File 'lib/webmidi/middleware/stack.rb', line 18

def call(message)
  build.call(message)
end

#use(middleware_class_or_proc, **options) ⇒ Object 



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# File 'lib/webmidi/middleware/stack.rb', line 12

def use(middleware_class_or_proc, **options)
  @middlewares << [middleware_class_or_proc, options]
  @app_cache = nil
  self
end