chronic_duration_attribute.rb 1.35 KB
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module ChronicDurationAttribute
  extend ActiveSupport::Concern

  class_methods do
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    def chronic_duration_attr_reader(virtual_attribute, source_attribute)
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      define_method(virtual_attribute) do
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        chronic_duration_attributes[virtual_attribute] || output_chronic_duration_attribute(source_attribute)
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      end
    end

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    def chronic_duration_attr_writer(virtual_attribute, source_attribute, parameters = {})
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      chronic_duration_attr_reader(virtual_attribute, source_attribute)
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      define_method("#{virtual_attribute}=") do |value|
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        chronic_duration_attributes[virtual_attribute] = value.presence || parameters[:default].presence.to_s
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        begin
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          new_value = value.present? ? ChronicDuration.parse(value).to_i : parameters[:default].presence
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          assign_attributes(source_attribute => new_value)
        rescue ChronicDuration::DurationParseError
          # ignore error as it will be caught by validation
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        end
      end
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      validates virtual_attribute, allow_nil: true, duration: true
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    end
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    alias_method :chronic_duration_attr, :chronic_duration_attr_writer
  end

  def chronic_duration_attributes
    @chronic_duration_attributes ||= {}
  end

  def output_chronic_duration_attribute(source_attribute)
    value = attributes[source_attribute.to_s]
    ChronicDuration.output(value, format: :short) if value
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  end
end