Class: Switcher::Statement

Inherits:
Object
  • Object
show all
Defined in:
lib/switcher/statement.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(instance, spec, state_current = nil, state_prev = nil) ⇒ Statement

Returns a new instance of Statement.



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# File 'lib/switcher/statement.rb', line 3

def initialize(instance, spec, state_current=nil, state_prev=nil)
  @spec          = spec
  @instance      = instance
  @state_prev    = state_prev
  @state_current = state_current
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/switcher/statement.rb', line 10

def name
  @name
end

#states ⇒ Object (readonly)

Returns the value of attribute states.



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# File 'lib/switcher/statement.rb', line 10

def states
  @states
end

Instance Method Details

#force_state(state) ⇒ Object

def publish



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# File 'lib/switcher/statement.rb', line 54

def force_state(state)
  return unless @spec.states_list.include?(state.to_sym) # FIXME - raise exception

  @state_prev    = state_current
  @state_current = state.to_sym

  return @instance
end

#publish(event, target, args) ⇒ Object 



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# File 'lib/switcher/statement.rb', line 20

def publish(event, target, args)
  states = @spec.states
  state  = state_current

  return unless states.has_key?(state)

  listener = states[state]
  facade   = Facade.new(target, args)

  ["before_#{event}", event.to_s].each do |ev|
    listener.trigger(ev, facade, @instance, args)
  end

  set_state(facade)

  listener.trigger("after_#{event}", facade, @instance, args)

  return if facade.bubble_cancelled

  unless @spec.subscribers.empty?
    @spec.subscribers.each do |sub|
      sub_instance = @instance.send(sub.to_sym)

      if sub_instance.respond_to?(:each)
        sub_instance.each { |ti| sub_switch(ti, target, event, args) }
      else
        sub_switch(sub_instance, target, event, args)
      end
    end # each
  end # unless

  return @instance
end

#state_current ⇒ Object 



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# File 'lib/switcher/statement.rb', line 12

def state_current
  (@state_current || @spec.states_list.first).to_sym
end

#state_prev ⇒ Object 



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# File 'lib/switcher/statement.rb', line 16

def state_prev
  @state_prev ? @state_prev.to_sym : nil
end