Module: Dec

Defined in:
lib/dec.rb

Constant Summary collapse

HASH_ARRAY = 
-> (h, k) { h[k] = [] }
NS = 
"_dec_".freeze

Instance Method Summary collapse

Instance Method Details

#_executor ⇒ Object 



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# File 'lib/dec.rb', line 7

def _executor
  @_dec_executor ||= Hash.new(&HASH_ARRAY)
end

#dec(*args, &block) ⇒ Object 



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# File 'lib/dec.rb', line 43

def dec(*args, &block)
  @_dec_stack = dec_stack + args << block
end

#dec_calls ⇒ Object 



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# File 'lib/dec.rb', line 15

def dec_calls
  @_dec_calls ||= []
end

#dec_stack ⇒ Object 



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# File 'lib/dec.rb', line 11

def dec_stack
  @_dec_stack ||= []
end

#method_added(method_sym) ⇒ Object 



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# File 'lib/dec.rb', line 19

def method_added(method_sym)
  return if method_sym.to_s.start_with?(NS) || dec_calls.include?(method_sym) || dec_stack.empty?

  dec_calls << method_sym

  alias_method :"#{NS}#{method_sym}", method_sym

  _executor[method_sym] = dec_stack
    .select { |fn| fn.respond_to?(:call) }
    .reverse

  dec_stack.clear

  class_eval "    def \#{method_sym}(*args, **kwargs, &block)\n      result = send(:\#{NS}\#{method_sym}, *args, *kwargs, &block)\n      stack = self.class._executor[:\#{method_sym}]\n\n      stack.each { |action| result = action.call(result) }\n      result\n    end\n  RB\nend\n", __FILE__, __LINE__ + 1