45 lines
1.1 KiB
Ruby
45 lines
1.1 KiB
Ruby
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class Item
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module Search
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module Fields
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class SetField < Field
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def initialize(*args)
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super(*args)
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@values = {true => Set.new, false => Set.new}
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end
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def <<(filter)
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if filter.value.respond_to?(:each)
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filter.value.each do |value|
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add_value(value, filter.positive?)
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end
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else
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add_value(filter.value, filter.positive?)
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end
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end
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def to_flex_params
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{
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key => nil_if_empty(@values[true]),
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:"negative_#{key}" => nil_if_empty(@values[false])
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}
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end
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private
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def add_value(value, is_positive)
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if @values[!is_positive].include?(value)
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raise Item::Search::Contradiction,
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"positive #{key} and negative #{key} both contain #{value}"
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end
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@values[is_positive] << value
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end
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def nil_if_empty(set)
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set unless set.empty?
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end
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end
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end
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end
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end
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