Module: Stateful::ActiveRecord::ClassMethods

Defined in:
lib/Stateful/ActiveRecord/ClassMethods.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(klass) ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 10

def extended(klass)
  klass.define_stateful_column_name_setter_method
  klass.define_stateful_column_name_getter_method
  klass.define_next_state_method
  klass.define_transitions_method
  klass.define_initial_stateQ_method
  klass.define_final_stateQ_method
end

Instance Method Details

#define_event_method(transition) ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 29

def define_event_method(transition)
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(transition.event_name) do
    next_state_name = self.send(stateful_column_name).next_state_name(transition.event_name)
    next_state = self.class.stateful_states.find(next_state_name)
    self.send("#{stateful_column_name}=", next_state)
  end
end

#define_final_stateQ_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 91

def define_final_stateQ_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(:final_state?) do
    final_states.include?(self.send(stateful_column_name))
  end
end

#define_initial_stateQ_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 84

def define_initial_stateQ_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(:initial_state?) do
    self.send(stateful_column_name) == initial_state
  end
end

#define_next_state_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 69

def define_next_state_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(:next_state) do |event_name|
    next_state_name = self.send(stateful_column_name).next_state_name(event_name)
    all_states.find(next_state_name)
  end
end

#define_stateful_column_name_getter_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 55

def define_stateful_column_name_getter_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(stateful_column_name) do
    instance_variable_set("@#{stateful_column_name}", self.class.stateful_states.find(read_attribute(stateful_column_name)))
    if state = instance_variable_get("@#{stateful_column_name}")
      state
    else
      initial_state = self.class.stateful_states.initial_state
      self.send("#{stateful_column_name}=", initial_state.name)
      initial_state
    end
  end
end

#define_stateful_column_name_setter_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 45

def define_stateful_column_name_setter_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method("#{stateful_column_name}=") do |state|
    instance_variable_set("@#{stateful_column_name}", self.class.stateful_states.find(state))
    write_attribute(stateful_column_name, instance_variable_get("@#{stateful_column_name}").name)
    self.save
    instance_variable_get("@#{stateful_column_name}")
  end
end

#define_status_predicate_method(state_name) ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 38

def define_status_predicate_method(state_name)
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method("#{state_name}?") do
    self.send(stateful_column_name).name == state_name
  end
end

#define_transitions_method ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 77

def define_transitions_method
  stateful_column_name = self.instance_variable_get(:@stateful_column_name)
  define_method(:transitions) do
    self.send(stateful_column_name).transitions
  end
end

#stateful_column_name ⇒ Object 



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 25

def stateful_column_name
  @stateful_column_name
end

#stateful_column_name=(stateful_column_name) ⇒ Object

class << self



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# File 'lib/Stateful/ActiveRecord/ClassMethods.rb', line 21

def stateful_column_name=(stateful_column_name)
  @stateful_column_name = stateful_column_name
end