Class: Golem::DSL::TransitionDef

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

Instance Method Summary collapse

Constructor Details

#initialize(machine, event, from_state, options = {}, &block) ⇒ TransitionDef

Returns a new instance of TransitionDef.



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# File 'lib/golem/dsl/transition_def.rb', line 7

def initialize(machine, event, from_state, options = {}, &block)
  @machine = machine
  @event = event
  @from = from_state
  
  if options[:to].blank? || options[:to] == :self
    @to = options[:to] = @state
  else
    @to = @machine.get_or_define_state(options[:to])
  end
  
  callbacks = {}
  callbacks[:on_transition] = options[:action] if options[:action]

  @transition = Golem::Model::Transition.new(@from, @to || @from, options[:guards], callbacks)

  if options[:comment]
    @transition.comment = options[:comment]
  end

  instance_eval(&block) if block

  @from.transitions_on_event[@event] ||= []
  @from.transitions_on_event[@event] << @transition
end

Instance Method Details

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



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# File 'lib/golem/dsl/transition_def.rb', line 44

def action(callback = nil, &block)
  #if @transition.callbacks[:on_transition]
  #  puts "WARNING: Overriding event action for #{@transition.to_s.inspect}."
  #end

  callback = block unless callback

  @transition.callbacks[:on_transition] = Golem::Model::Callback.new(callback)
end

#comment(comment) ⇒ Object 



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# File 'lib/golem/dsl/transition_def.rb', line 54

def comment(comment)
  if @transition.comment
    @transition.comment += "\n#{comment}"
  else
    @transition.comment = comment
  end
end

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



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# File 'lib/golem/dsl/transition_def.rb', line 33

def guard(callback_or_options = {}, guard_options = {}, &block)
  if callback_or_options.kind_of? Hash
    callback = block
    guard_options = callback_or_options
  else
    callback = callback_or_options
  end
  
  @transition.guards << Golem::Model::Condition.new(callback, guard_options)
end