Class: Mutator::Machine

Inherits:
Object
  • Object
show all
Defined in:
lib/mutator/machine.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stateholder) ⇒ Machine

Returns a new instance of Machine.



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# File 'lib/mutator/machine.rb', line 5

def initialize(stateholder)
  @stateholder = stateholder
end

Instance Attribute Details

#stateholder ⇒ Object (readonly)

Returns the value of attribute stateholder.



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# File 'lib/mutator/machine.rb', line 3

def stateholder
  @stateholder
end

Class Method Details

.states ⇒ Object 



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# File 'lib/mutator/machine.rb', line 30

def self.states
  self.transitions.map do |t|
    [t[:to], t[:from]]
  end.flatten.uniq
end

Instance Method Details

#current_state ⇒ Object 



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# File 'lib/mutator/machine.rb', line 13

def current_state
  stateholder.state
end

#states ⇒ Object 



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# File 'lib/mutator/machine.rb', line 36

def states
  self.class.states
end

#transition(to:, success: lambda { |_transition| }, failure: lambda { |_transition| }) ⇒ Object 



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# File 'lib/mutator/machine.rb', line 17

def transition(to:, success: lambda { |_transition| }, failure: lambda { |_transition| })
  transition = Transition.new(to: to, from: current_state, machine: self)

  if transition.valid?
    stateholder.state = to
    success.call(transition)
    true
  else
    failure.call(transition)
    false
  end
end

#transitions ⇒ Object 



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# File 'lib/mutator/machine.rb', line 40

def transitions
  self.class.transitions
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mutator/machine.rb', line 9

def valid?
  self.class.states.include? current_state
end