Class: RailsStateMachine::StateManager

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_state_machine/state_manager.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(record, state_machine, state_attribute) ⇒ StateManager

Returns a new instance of StateManager.



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# File 'lib/rails_state_machine/state_manager.rb', line 6

def initialize(record, state_machine, state_attribute)
  @record = record
  @state_machine = state_machine
  @state_attribute = state_attribute
end

Instance Attribute Details

#next_event ⇒ Object

Returns the value of attribute next_event.



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# File 'lib/rails_state_machine/state_manager.rb', line 3

def next_event
  @next_event
end

#state_attribute ⇒ Object (readonly)

Returns the value of attribute state_attribute.



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# File 'lib/rails_state_machine/state_manager.rb', line 4

def state_attribute
  @state_attribute
end

#state_before_state_event ⇒ Object

Returns the value of attribute state_before_state_event.



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# File 'lib/rails_state_machine/state_manager.rb', line 3

def state_before_state_event
  @state_before_state_event
end

Instance Method Details

#revert ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 24

def revert
  if @next_event
    self.state = @state_before_state_event
    self.state_event = @next_event.name
  end
end

#source_state ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 31

def source_state
  if @record.new_record?
    state
  else
    state_in_database
  end
end

#state ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 12

def state
  @record.public_send(@state_attribute)
end

#state=(value) ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 20

def state=(value)
  @record.public_send(:"#{@state_attribute}=", value)
end

#state_event ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 39

def state_event
  @record.public_send(:"#{@state_machine.state_attribute}_event")
end

#state_event=(value) ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 43

def state_event=(value)
  @record.public_send(:"#{@state_machine.state_attribute}_event=", value)
end

#state_in_database ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 16

def state_in_database
  @record.public_send(:"#{@state_attribute}_in_database").to_s
end

#transition_allowed_for?(event_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rails_state_machine/state_manager.rb', line 47

def transition_allowed_for?(event_name)
  !!@state_machine.find_event(event_name)&.allowed_from?(state)
end

#transition_to(event_name) ⇒ Object 



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# File 'lib/rails_state_machine/state_manager.rb', line 51

def transition_to(event_name)
  if transition_allowed_for?(event_name)
    self.state_before_state_event = source_state
    event = @state_machine.find_event(event_name)
    self.state = event.future_state_name(state).to_s
    self.state_event = nil
    @next_event = event

    true
  else
    false
  end
end