igmarin/ruby-core-skills

Curated library of 16 public Ruby AI agent skills covering TDD, refactoring, code review, security review, DDD, YARD documentation, and common design patterns.

1.13x

Quality

96%

Does it follow best practices?

Impact

94%

1.13x

Average score across 16 eval scenarios

Securityby

Advisory

Suggest reviewing before use

Implementation Reference

Name: igmarin/ruby-core-skills
Rating: 94.27 (1 reviews)
Author: igmarin

BaseService

# frozen_string_literal: true

module PricingCalculator
  class BaseService
    def initialize(order)
      @order = order
    end

    def calculate
      return nil unless should_calculate?
      compute_result(@order.base_price)
    end

    private

    def should_calculate? = @order.present? && @order.plan&.active?

    def compute_result(_price)
      raise NotImplementedError, "#{self.class}#compute_result must be implemented"
    end
  end
end

NullService

# frozen_string_literal: true

module PricingCalculator
  class NullService < BaseService
    private

    def should_calculate? = false
    def compute_result(_price) = nil
  end
end

Concrete Service Example

# frozen_string_literal: true

module PricingCalculator
  class StandardPricingService < BaseService
    DISCOUNT = 0.10

    private

    def should_calculate?
      super && @order.plan.name == 'standard'
    end

    def compute_result(base_price)
      base_price * (1 - DISCOUNT)
    end
  end
end