Module: Control::State::ClassMethods

Defined in:
lib/control/state.rb

Instance Method Summary collapse

Instance Method Details

#final? ⇒ Boolean

Checks if a state is final. There can be no transitions.



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# File 'lib/control/state.rb', line 55

def final?
  !!@final
end

#is_state? ⇒ Boolean

Checks if class is a state



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# File 'lib/control/state.rb', line 37

def is_state?
  true
end

#next_states(*states) ⇒ Array<State>

Getter/setter for possible next_states



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# File 'lib/control/state.rb', line 15

def next_states(*states)
  if states.any?
    if states.include? :none
      @final = true
    else
      @next_states = states.map{|s| s.to_s.classify}.compact
    end
  else
    if @final                                         # state is final, there are no possible next states
      Array.new
    else                                              # state is not final, carry on
      if @next_states                                 # possible next states were previously declared in class
        @next_states.map { |s| Kernel.qualified_const_get(s) }
      else                                            # all states connected to the workflow are valid, no constrains
        workflow_class.states
      end
    end
  end
end

#workflow_class ⇒ Class

Gets the workflow class associated with the state



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# File 'lib/control/state.rb', line 43

def workflow_class
  unless @workflow_class
    reflect_on_all_associations.each do |a|
      klass = a.klass
      @workflow_class = klass if klass.respond_to?(:is_workflow?) && klass.is_workflow?
    end
  end
  @workflow_class
end