Module: Pathway::Plugins::Base::DSLMethods

Defined in:
lib/pathway.rb

Instance Method Summary collapse

Instance Method Details

#around(wrapper, &steps) ⇒ Object Also known as: sequence 



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# File 'lib/pathway.rb', line 165

def around(wrapper, &steps)
  @result.then do |state|
    seq = -> (dsl = self) { @result = dsl.run(&steps) }
    _callable(wrapper).call(seq, state)
  end
end

#if_false(cond, &steps) ⇒ Object 



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# File 'lib/pathway.rb', line 179

def if_false(cond, &steps)
  cond = _callable(cond)
  if_true(-> state { !cond.call(state) }, &steps)
end

#if_true(cond, &steps) ⇒ Object Also known as: guard 



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# File 'lib/pathway.rb', line 172

def if_true(cond, &steps)
  cond = _callable(cond)
  around(-> seq, state {
    seq.call if cond.call(state)
  }, &steps)
end

#initialize(state, operation) ⇒ Object 



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# File 'lib/pathway.rb', line 133

def initialize(state, operation)
  @result, @operation = wrap(state), operation
end

#map(callable) ⇒ Object

Execute step and replace the current state completely



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# File 'lib/pathway.rb', line 160

def map(callable)
  bl = _callable(callable)
  @result = @result.then(bl)
end

#run(&bl) ⇒ Object 



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# File 'lib/pathway.rb', line 137

def run(&bl)
  instance_eval(&bl)
  @result
end

#set(callable, *args, to: @operation.result_key) ⇒ Object

Execute step and modify the former state setting the key



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# File 'lib/pathway.rb', line 150

def set(callable, *args, to: @operation.result_key)
  bl = _callable(callable)

  @result = @result.then do |state|
    wrap(bl.call(state, *args))
      .then { |value| state.update(to => value) }
  end
end