46 lines
898 B
Ruby
46 lines
898 B
Ruby
RankingEntry = Struct.new :talk_id, :votes, :place
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class Ranking
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include ActiveModel::Model
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attr_accessor :talk_ids
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def ranking
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@ranking ||= ranking_data.map do |talk_id, votes, place|
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RankingEntry.new talk_id, votes, place
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end
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end
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def [](talk_id)
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ranking[talk_id]
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end
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def talk_ids
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@talk_ids ||= []
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end
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private
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def ranking_data
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vote_data.sort_by { |_, votes| -votes }
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.group_by { |_, votes| votes }
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.each_with_index.map do |votes, placement|
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votes.last.map {|talk_vote_data| talk_vote_data << placement + 1 }
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end.flatten(1)
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end
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def vote_data
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blank_vote_data.merge(database_vote_data)
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end
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def blank_vote_data
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talk_ids.map do |talk_id|
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[talk_id, 0]
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end.to_h
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end
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def database_vote_data
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SelectedTalk.group(:talk_id).where(talk_id: @talk_ids).count
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end
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end
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