Created
January 29, 2015 04:20
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| module OnSomething | |
| def self.included(base) | |
| base.extend(ClassMethods) | |
| end | |
| module ClassMethods | |
| def on(type) | |
| attr_accessor "#{type}_starts_at" | |
| attr_accessor "#{type}_ends_at" | |
| class_eval(%Q! | |
| def on_#{type}? | |
| Time.now >= #{type}_starts_at && Time.now <= #{type}_ends_at | |
| end | |
| !) | |
| end | |
| end | |
| end | |
| class Sale | |
| include OnSomething | |
| on :sale | |
| end | |
| sale = Sale.new | |
| sale.sale_starts_at = Time.now | |
| sale.sale_ends_at = Time.now + 10 | |
| puts sale.on_sale? |
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