Class: Golem::DSL::EventDef

Inherits:
Object
  • Object
show all
Defined in:
lib/golem/dsl/event_def.rb

Instance Method Summary collapse

Constructor Details

#initialize(machine, on_state, event_name, options, &block) ⇒ EventDef

Returns a new instance of EventDef.



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# File 'lib/golem/dsl/event_def.rb', line 6

def initialize(machine, on_state, event_name, options, &block)
  @machine = machine
  @state = on_state
  @event = @machine.get_or_define_event(event_name)

  if options[:to]
    @to = @machine.get_or_define_state(options[:to])
  end

  @guards = []

  guard = options[:if] || options[:guard]
  if guard
    if guard.kind_of?(Golem::Model::Condition)
      @guards << guard
    else
      @guards << Golem::Model::Condition.new(guard, options[:guard_options] || {})
    end
  end

  action = options[:action] || options[:on_transition]
  @action = Golem::Model::Callback.new(action) if action

  
  instance_eval(&block) if block_given?

  if @state.transitions_on_event[@event].blank?
    transition :to => (@to || @state), :guards => @guards, :action => @action
  end
end

Instance Method Details

#action(callback = nil, &block) ⇒ Object 



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# File 'lib/golem/dsl/event_def.rb', line 81

def action(callback = nil, &block)
  callback = block unless callback

  @action = Golem::Model::Callback.new(callback)
end

#guard(callback_or_options = {}, guard_options = {}, &block) ⇒ Object 



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# File 'lib/golem/dsl/event_def.rb', line 69

def guard(callback_or_options = {}, guard_options = {}, &block)
  # FIXME: are guard_options ever actually used?
  if callback_or_options.kind_of? Hash
    callback = block
    guard_options = callback_or_options
  else
    callback = callback_or_options
  end

  @guards << Golem::Model::Condition.new(callback, guard_options)
end

#transition(options = {}, &block) ⇒ Object 



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# File 'lib/golem/dsl/event_def.rb', line 37

def transition(options = {}, &block)
  if options[:to] == :self
    to = @state
  elsif options[:to]
    to = @machine.get_or_define_state(options[:to])
  else
    to = @to
  end

  options[:to] = to

  guard = options[:if] || options[:guard]
  if guard
    if guard.kind_of?(Golem::Model::Condition)
      guards = @guards + [guard]
    else
      guards = @guards + [Golem::Model::Condition.new(guard)]
    end
  end

  options[:guards] = guards || @guards.dup
  
  action = options[:action] || options[:on_transition]
  if action
    options[:action] = Golem::Model::Callback.new(action) unless action.kind_of?(Golem::Model::Callback)
  else
    options[:action] = @action
  end

  TransitionDef.new(@machine, @event, @state, options.dup, &block)
end