Class: Acts::As::Multiple::StateMachines::SupportingClasses::StateTransition

Inherits:
Object
  • Object
show all
Defined in:
lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(state_machine, options) ⇒ StateTransition

Returns a new instance of StateTransition.



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 10

def initialize(state_machine, options)
  @from  = options[:from].to_s
  @to    = options[:to].to_s
  @guard = options[:guard] || NOOP
  @opts  = options
  @sm = state_machine
end

Instance Attribute Details

#from ⇒ Object (readonly)

Returns the value of attribute from.



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 8

def from
  @from
end

#opts ⇒ Object (readonly)

Returns the value of attribute opts.



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 8

def opts
  @opts
end

#sm ⇒ Object (readonly)

Returns the value of attribute sm.



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 8

def sm
  @sm
end

#to ⇒ Object (readonly)

Returns the value of attribute to.



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 8

def to
  @to
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 38

def ==(obj)
  @from == obj.from && @to == obj.to
end

#guard(obj) ⇒ Object 



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 18

def guard(obj)
  @guard ? sm.send(:run_transition_action, obj, @guard) : true
end

#perform(record) ⇒ Object 



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# File 'lib/acts/as/multiple/state_machines/supporting_classes/state_transition.rb', line 22

def perform(record)
  return false unless guard(record)
  loopback = sm.current_state(record).to_s == to
  states = sm.state_map
  next_state = states[to]
  old_state = states[sm.current_state(record).to_s]

  next_state.entering(record) unless loopback

  record.update_attribute(sm.state_column, next_state.value)

  next_state.entered(record) unless loopback
  old_state.exited(record) unless loopback
  true
end