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