Class: Lab42::StateMachine::State

Inherits:
Object
  • Object
show all
Defined in:
lib/lab42/state_machine/state.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#designation ⇒ Object (readonly)

Returns the value of attribute designation.



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# File 'lib/lab42/state_machine/state.rb', line 5

def designation
  @designation
end

#triggers ⇒ Object (readonly)

Returns the value of attribute triggers.



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# File 'lib/lab42/state_machine/state.rb', line 5

def triggers
  @triggers
end

Instance Method Details

#_match(input, trigger) ⇒ Object 



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# File 'lib/lab42/state_machine/state.rb', line 24

def _match(input, trigger)
  case trigger
  when Lab42::Match
    m =trigger.match(input)
    m.success? && m
  when TrueClass
    true
  when FalseClass
    raise StopIteration
  when Symbol
    input.send trigger
  end
end

#add(trigger, action, new_state) ⇒ Object 



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# File 'lib/lab42/state_machine/state.rb', line 7

def add(trigger, action, new_state)
  trigger = Lab42::Match.new(trigger) if Regexp === trigger
  new_state ||= designation
  @triggers << [trigger, action, new_state]
end

#freeze ⇒ Object 



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# File 'lib/lab42/state_machine/state.rb', line 38

def freeze
  super
  @triggers.freeze
end

#transition(accumulator, input) ⇒ Object 



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# File 'lib/lab42/state_machine/state.rb', line 13

def transition(accumulator, input)
  triggers.each do |trigger, action, new_state|
    match = _match input, trigger
    next unless match
    output, new_acc, new_state1 = _apply(match, accumulator, input: input, to: action)
    output = output.string if Lab42::Match === output
    return [output, new_acc || accumulator, new_state1 || new_state || designation]
  end
  [input, accumulator, designation]
end