Class: Tapioca::Compilers::Dsl::StateMachines

Inherits:
Base
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/tapioca/compilers/dsl/state_machines.rb

Overview

‘Tapioca::Compilers::Dsl::StateMachines` generates RBI files for classes that setup a [`state_machine`](github.com/state-machines/state_machines). The generator also processes the extra methods generated by [StateMachines Active Record](github.com/state-machines/state_machines-activerecord) and [StateMachines Active Model](github.com/state-machines/state_machines-activemodel) integrations.

For example, with the following ‘Vehicle` class:

~~~rb class Vehicle

state_machine :alarm_state, initial: :active, namespace: :'alarm' do
  event :enable do
    transition all => :active
  end

  event :disable do
    transition all => :off
  end

  state :active, :value => 1
  state :off, :value => 0
end

end ~~~

this generator will produce the RBI file ‘vehicle.rbi` with the following content:

~~~rbi # vehicle.rbi # typed: true class Vehicle

include StateMachineInstanceHelperModule
extend StateMachineClassHelperModule

module StateMachineClassHelperModule
  sig { params(event: T.any(String, Symbol)).returns(String) }
  def human_alarm_state_event_name(event); end

  sig { params(state: T.any(String, Symbol)).returns(String) }
  def human_alarm_state_name(state); end
end

module StateMachineInstanceHelperModule
  sig { returns(T::Boolean) }
  def alarm_active?; end

  sig { returns(T::Boolean) }
  def alarm_off?; end

  sig { returns(Integer) }
  def alarm_state; end

  sig { params(value: Integer).returns(Integer) }
  def alarm_state=(value); end

  sig { params(state: T.any(String, Symbol)).returns(T::Boolean) }
  def alarm_state?(state); end

  sig { params(args: T.untyped).returns(T::Array[T.any(String, Symbol)]) }
  def alarm_state_events(*args); end

  sig { returns(T.any(String, Symbol)) }
  def alarm_state_name; end

  sig { params(args: T.untyped).returns(T::Array[::StateMachines::Transition]) }
  def alarm_state_paths(*args); end

  sig { params(args: T.untyped).returns(T::Array[::StateMachines::Transition]) }
  def alarm_state_transitions(*args); end

  sig { returns(T::Boolean) }
  def can_disable_alarm?; end

  sig { returns(T::Boolean) }
  def can_enable_alarm?; end

  sig { params(args: T.untyped).returns(T::Boolean) }
  def disable_alarm(*args); end

  sig { params(args: T.untyped).returns(T::Boolean) }
  def disable_alarm!(*args); end

  sig { params(args: T.untyped).returns(T.nilable(::StateMachines::Transition)) }
  def disable_alarm_transition(*args); end

  sig { params(args: T.untyped).returns(T::Boolean) }
  def enable_alarm(*args); end

  sig { params(args: T.untyped).returns(T::Boolean) }
  def enable_alarm!(*args); end

  sig { params(args: T.untyped).returns(T.nilable(::StateMachines::Transition)) }
  def enable_alarm_transition(*args); end

  sig { params(event: T.any(String, Symbol), args: T.untyped).returns(T::Boolean) }
  def fire_alarm_state_event(event, *args); end

  sig { returns(String) }
  def human_alarm_state_name; end
end

end ~~~

Instance Attribute Summary

Attributes inherited from Base

#processable_constants

Instance Method Summary collapse

Methods inherited from Base

#handles?, #initialize

Constructor Details

This class inherits a constructor from Tapioca::Compilers::Dsl::Base

Instance Method Details

#decorate(root, constant) ⇒ Object 



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# File 'lib/tapioca/compilers/dsl/state_machines.rb', line 125

def decorate(root, constant)
  return if constant.state_machines.empty?

  root.path(constant) do |klass|
    instance_module_name = "StateMachineInstanceHelperModule"
    class_module_name = "StateMachineClassHelperModule"

    instance_module = klass.create_module(instance_module_name)
    class_module = klass.create_module(class_module_name)

    constant.state_machines.each_value do |machine|
      state_type = state_type_for(machine)

      define_state_accessor(instance_module, machine, state_type)
      define_state_predicate(instance_module, machine)
      define_event_helpers(instance_module, machine)
      define_path_helpers(instance_module, machine)
      define_name_helpers(instance_module, class_module, machine)
      define_scopes(class_module, machine)

      define_state_methods(instance_module, machine)
      define_event_methods(instance_module, machine)
    end

    matching_integration_name = ::StateMachines::Integrations.match(constant)&.integration_name

    case matching_integration_name
    when :active_record
      define_activerecord_methods(instance_module)
    end

    klass.create_include(instance_module_name)
    klass.create_extend(class_module_name)
  end
end

#gather_constants ⇒ Object 



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# File 'lib/tapioca/compilers/dsl/state_machines.rb', line 162

def gather_constants
  Object.descendants.select { |mod| mod < ::StateMachines::InstanceMethods }
end