Module: Foobara::StateMachine::Sugar::ClassMethods

Defined in:
foobara-0.0.110/projects/state_machine/src/sugar.rb

Instance Method Summary collapse

Instance Method Details

#create_can_methods ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 107

def create_can_methods
  transitions.each do |transition|
    define_method "can_#{transition}?" do
      can?(transition)
    end
  end
end

#create_enums ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 90

def create_enums
  self.state = Enumerated::Values.new(states)
  self.transition = Enumerated::Values.new(transitions)
end

#create_state_predicate_methods ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 95

def create_state_predicate_methods
  states.each do |state|
    define_method "currently_#{state}?" do
      current_state == state
    end

    define_method "ever_#{state}?" do
      current_state == state || log.any? { |log_entry| log_entry.from == state }
    end
  end
end

#create_transition_methods ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 115

def create_transition_methods
  transitions.each do |transition|
    define_method "#{transition}!" do |&block|
      perform_transition!(transition, &block)
    end
  end
end

#desugarize_transition_map ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 10

def desugarize_transition_map
  self.transition_map = {}

  raw_transition_map.each_pair do |from_state, transitions|
    Util.array(from_state).each do |state|
      state = state.to_sym

      transitions.each_pair do |transition, next_state|
        transition = transition.to_sym
        next_state = next_state.to_sym

        transitions_for_state = transition_map[state] ||= {}

        if transitions_for_state.key?(transition)
          # :nocov:
          raise TransitionAlreadyDefinedError, "There's already a #{transition} for #{state}"
          # :nocov:
        end

        transitions_for_state[transition] = next_state
      end
    end
  end

  transition_map.freeze
end

#determine_states_and_transitions ⇒ Object 



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# File 'foobara-0.0.110/projects/state_machine/src/sugar.rb', line 37

def determine_states_and_transitions
  computed_non_terminal_states = transition_map.keys.uniq
  computed_terminal_states = []
  computed_transitions = []

  transition_map.each_value do |transitions|
    transitions.each_pair do |transition, to_state|
      computed_transitions << transition unless computed_transitions.include?(transition)

      if !computed_non_terminal_states.include?(to_state) && !computed_terminal_states.include?(to_state)
        computed_terminal_states << to_state
      end
    end
  end

  if terminal_states
    all_states = computed_non_terminal_states + computed_terminal_states
    validate_terminal_states(computed_terminal_states, all_states)
    # User has marked states as explicitly terminal even though they might have transitions
    # This is allowed. So fix any such computations.
    computed_non_terminal_states -= terminal_states
    computed_terminal_states |= terminal_states
  else
    self.terminal_states = computed_terminal_states.freeze
  end

  self.non_terminal_states = computed_non_terminal_states.freeze

  computed_states = computed_non_terminal_states + computed_terminal_states

  if states
    validate_states(computed_states)
  else
    self.states = computed_states.freeze
  end

  if transitions
    validate_transitions(computed_transitions)
  else
    self.transitions = computed_transitions.freeze
  end

  if initial_state
    unless states.include?(initial_state)
      raise BadInitialState, "Initial state explicitly set to #{
        initial_state
      } but should have been one of #{states}"
    end
  else
    self.initial_state = states.first
  end
end