Class: Decider::Reactor::Module

Inherits:
Module
  • Object
show all
Defined in:
lib/decider/reactor.rb

Defined Under Namespace

Classes: React

Constant Summary collapse

REACT_FALLBACK = 
proc { [nil, proc {}] }

Instance Method Summary collapse

Constructor Details

#initialize(reactions:) ⇒ Module

Returns a new instance of Module.



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# File 'lib/decider/reactor.rb', line 14

def initialize(reactions:)
  define_method(:react) do |action_result|
    context = React.new(action_result: action_result, _actions: [])

    reactions.find(REACT_FALLBACK) do |arg, _|
      case arg
      in Proc => fn
        context.instance_exec(&fn)
      in artype
        action_result in ^artype
      else
        false
      end
    end => [_, handler]

    context.instance_exec(&handler)
    context._actions
  end

  define_method(:lmap_on_action_result) do |fn|
    Decider::Reactor.lmap_on_action_result(fn, self)
  end

  define_method(:rmap_on_action) do |fn|
    Decider::Reactor.rmap_on_action(fn, self)
  end

  define_method(:map_on_action) do |fn|
    Decider::Reactor.rmap_on_action(fn, self)
  end

  define_method(:combine_with_decider) do |decider|
    Decider::Reactor.combine_with_decider(self, decider)
  end
end