Trailcrazer

operation.cr

class Dummy3 < Trailcrazer::Operation
  step :one
  step :two, StepTwo

  # can be a block (pay attention to use {} and not do/end)
  define_step :one, ->(ctx : Trailcrazer::Context, params : OperationType) {
    ctx[:sum] = params[:initial] + 4
    true
  }

  # or a Class (inherit Trailcrazer::Step)
  class StepTwo < Trailcrazer::Step
    def run(ctx : Trailcrazer::Context, params : OperationType)
      ctx[:final] = ctx[:sum] + 6
      true
    end
  end
end