45 lines
942 B
Ruby
45 lines
942 B
Ruby
class ConflictCoefficient
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attr_reader :left, :right
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def self.all
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Talk.find(:all, from: :halfnarp_friendly).map(&:id).combination(2).map do |talks|
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ConflictCoefficient.new talks.first, talks.last
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end
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end
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def self.all_as_hash
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conflicts_hash = {}
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all.each do |coefficient|
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conflicts_hash[coefficient.left] = {} unless conflicts_hash[coefficient.left]
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conflicts_hash[coefficient.left][coefficient.right] = coefficient.per_cent
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end
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conflicts_hash
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end
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def conflicts
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@conflicts ||= talk_preferences.select do |talk_preference|
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talk_preference.include_all? [@left, @right]
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end.count
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end
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def total_votes
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talk_preferences.count
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end
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def initialize(left, right)
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@left, @right = left, right
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end
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def per_cent
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Rational(100 * conflicts, total_votes).to_f
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end
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private
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def talk_preferences
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@talk_preferences ||= TalkPreference.this_years
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end
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end
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