Class: CompetitionRankingLeaderboard

Inherits:
Leaderboard show all
Defined in:
lib/competition_ranking_leaderboard.rb

Constant Summary

Constants inherited from Leaderboard

Leaderboard::DEFAULT_LEADERBOARD_REQUEST_OPTIONS, Leaderboard::DEFAULT_OPTIONS, Leaderboard::DEFAULT_PAGE_SIZE, Leaderboard::DEFAULT_REDIS_HOST, Leaderboard::DEFAULT_REDIS_OPTIONS, Leaderboard::DEFAULT_REDIS_PORT, Leaderboard::VERSION

Instance Attribute Summary

Attributes inherited from Leaderboard

#leaderboard_name, #page_size, #reverse

Instance Method Summary collapse

Methods inherited from Leaderboard

#all_leaders, #all_leaders_from, #around_me, #around_me_in, #change_score_for, #change_score_for_member_in, #check_member?, #check_member_in?, #delete_leaderboard, #delete_leaderboard_named, #disconnect, #expire_leaderboard, #expire_leaderboard_at, #expire_leaderboard_at_for, #expire_leaderboard_for, #initialize, #intersect_leaderboards, #leaders, #leaders_in, #member_at, #member_at_in, #member_data_for, #member_data_for_in, #members_from_rank_range, #members_from_rank_range_in, #members_from_score_range, #members_from_score_range_in, #merge_leaderboards, #page_for, #page_for_in, #percentile_for, #percentile_for_in, #rank_for, #rank_member, #rank_member_across, #rank_member_if, #rank_member_if_in, #rank_member_in, #rank_members, #rank_members_in, #ranked_in_list, #remove_member, #remove_member_data, #remove_member_data_in, #remove_member_from, #remove_members_in_score_range, #remove_members_in_score_range_in, #remove_members_outside_rank, #remove_members_outside_rank_in, #score_and_rank_for, #score_for, #score_for_in, #score_for_percentile, #score_for_percentile_in, #top, #top_in, #total_members, #total_members_in, #total_members_in_score_range, #total_members_in_score_range_in, #total_pages, #total_pages_in, #update_member_data, #update_member_data_in

Constructor Details

This class inherits a constructor from Leaderboard

Instance Method Details

#rank_for_in(leaderboard_name, member) ⇒ Object

Retrieve the rank for a member in the named leaderboard.

Parameters:

  • leaderboard_name (String) —

    Name of the leaderboard.

  • member (String) —

    Member name.

Returns:

  • the rank for a member in the leaderboard.



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# File 'lib/competition_ranking_leaderboard.rb', line 10

def rank_for_in(leaderboard_name, member)
  member_score = score_for_in(leaderboard_name, member)
  if @reverse
    return @redis_connection.zcount(leaderboard_name, '-inf', "(#{member_score}") + 1 rescue nil
  else
    return @redis_connection.zcount(leaderboard_name, "(#{member_score}", '+inf') + 1 rescue nil
  end
end

#ranked_in_list_in(leaderboard_name, members, options = {}) ⇒ Object

Retrieve a page of leaders from the named leaderboard for a given list of members.

Parameters:

  • leaderboard_name (String) —

    Name of the leaderboard.

  • members (Array) —

    Member names.

  • options (Hash) (defaults to: {}) —

    Options to be used when retrieving the page from the named leaderboard.

Returns:

  • a page of leaders from the named leaderboard for a given list of members.



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# File 'lib/competition_ranking_leaderboard.rb', line 53

def ranked_in_list_in(leaderboard_name, members, options = {})
  leaderboard_options = DEFAULT_LEADERBOARD_REQUEST_OPTIONS.dup
  leaderboard_options.merge!(options)

  ranks_for_members = []

  responses = @redis_connection.multi do |transaction|
    members.each do |member|
      if @reverse
        transaction.zrank(leaderboard_name, member)
      else
        transaction.zrevrank(leaderboard_name, member)
      end
      transaction.zscore(leaderboard_name, member)
    end
  end unless leaderboard_options[:members_only]

  members.each_with_index do |member, index|
    data = {}
    data[@member_key] = member
    unless leaderboard_options[:members_only]
      data[@score_key] = responses[index * 2 + 1].to_f if responses[index * 2 + 1]
      if data[@score_key] == nil
        next unless leaderboard_options[:include_missing]
      end

      if @reverse
        data[@rank_key] = @redis_connection.zcount(leaderboard_name, '-inf', "(#{data[@score_key]}") + 1 rescue nil
      else
        data[@rank_key] = @redis_connection.zcount(leaderboard_name, "(#{data[@score_key]}", '+inf') + 1 rescue nil
      end
    end

    if leaderboard_options[:with_member_data]
      data[@member_data_key] = member_data_for_in(leaderboard_name, member)
    end

    ranks_for_members << data
  end

  case leaderboard_options[:sort_by]
  when :rank
    ranks_for_members = ranks_for_members.sort_by { |member| member[@rank_key] }
  when :score
    ranks_for_members = ranks_for_members.sort_by { |member| member[@score_key] }
  end

  ranks_for_members
end

#score_and_rank_for_in(leaderboard_name, member) ⇒ Object

Retrieve the score and rank for a member in the named leaderboard.

Parameters:

  • leaderboard_name (String) —

    Name of the leaderboard.

  • member (String) —

    Member name.

Returns:

  • the score and rank for a member in the named leaderboard as a Hash.



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# File 'lib/competition_ranking_leaderboard.rb', line 25

def score_and_rank_for_in(leaderboard_name, member)
  responses = @redis_connection.multi do |transaction|
    transaction.zscore(leaderboard_name, member)
    if @reverse
      transaction.zrank(leaderboard_name, member)
    else
      transaction.zrevrank(leaderboard_name, member)
    end
  end

  responses[0] = responses[0].to_f if responses[0]
  responses[1] =
    if @reverse
      @redis_connection.zcount(leaderboard_name, '-inf', "(#{responses[0]}") + 1 rescue nil
    else
      @redis_connection.zcount(leaderboard_name, "(#{responses[0]}", '+inf') + 1 rescue nil
    end

  {@member_key => member, @score_key => responses[0], @rank_key => responses[1]}
end