Extracting tournament round building logic
This commit is contained in:
Dan Buch
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dd06034974
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efd2178294
@ -16,105 +16,4 @@ class MashTournament < ActiveRecord::Base
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:conditions => {:number => number}
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)
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end
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def valid_number_of_contenders?(n_contenders)
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[8, 16, 32, 64, 128].include?(n_contenders)
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end
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def create_rounds_for_contenders(n_contenders)
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if not valid_number_of_contenders?(n_contenders)
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raise StandardError.new(
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"The number of contenders must be 8, 16, 32, 64, or 128! " +
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"Got '#{n_contenders}'"
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)
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end
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round = 1
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while n_contenders > 1
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create_round(round, n_contenders)
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n_contenders = n_contenders / 2
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round += 1
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end
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self.total_rounds = round - 1
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end
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def fill_in_next_round
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self.rounds.sort{ |a,b| a.number <=> b.number}.each do |round|
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if not round.done?
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return assign_maps_for_round(round)
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end
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end
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end
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private
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def create_round(round_number, n_contenders)
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round = MashTournamentRound.new(
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:mash_tournament_id => self.id,
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:number => round_number,
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:mash_count => n_contenders / 2
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)
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round.save!
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n_contenders.times do
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Mash.new(
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:mash_tournament_id => self.id,
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:mash_tournament_round_id => round.id
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).save!
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end
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end
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def assign_maps_for_round(round)
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if round.number == 1
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return assign_maps_for_round_one(round)
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end
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previous = MashTournamentRound.find_by_mash_tournament_id_and_number(
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self.id, round.number - 1
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)
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previous_winners = previous.mashes.collect(&:winner_id)
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pool = Map.all(
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:order => 'RANDOM()',
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:conditions => ['id in ?', previous_winners]
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)
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filled_in = []
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round.mashes.each do |mash|
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mash.map_a = pool.pop.id
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mash.map_b = pool.pop.id
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mash.save!
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filled_in << mash
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end
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filled_in
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end
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def assign_maps_for_round_one(round)
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pool = Map.all(
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:order => 'RANDOM()',
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:limit => round.mash_count * 2
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)
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logger.info("Populating mashes from pool: #{pool.inspect}")
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filled_in = []
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round.mashes.each do |mash|
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map_a = pool.pop
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map_b = pool.pop
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logger.info("Assigning `map_a` from #{map_a.inspect}, " +
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"`map_b` from #{map_b.inspect} to mash #{mash.inspect}")
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mash.map_a = map_a
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mash.map_b = map_b
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mash.save!
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filled_in << mash
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end
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filled_in
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end
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end
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113
rails/map-mash/lib/mash_tournament_builder.rb
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113
rails/map-mash/lib/mash_tournament_builder.rb
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@ -0,0 +1,113 @@
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class MashTournamentBuilder
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attr_accessor :tournament, :tournament_model, :round_model
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attr_accessor :map_model, :mash_model
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def initialize(tournament, tournament_model, round_model, map_model, mash_model)
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@tournament = tournament
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@tournament_model = tournament_model
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@round_model = round_model
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@map_model = map_model
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@mash_model = mash_model
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end
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def valid_number_of_contenders?(n_contenders)
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[8, 16, 32, 64, 128].include?(n_contenders)
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end
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def create_rounds_for_contenders(n_contenders)
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if not valid_number_of_contenders?(n_contenders)
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raise StandardError.new(
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"The number of contenders must be 8, 16, 32, 64, or 128! " +
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"Got '#{n_contenders}'"
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)
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end
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round = 1
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while n_contenders > 1
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create_round(round, n_contenders)
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n_contenders = n_contenders / 2
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round += 1
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end
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@tournament.total_rounds = round - 1
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end
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def fill_in_next_round
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@tournament.rounds.sort{ |a,b| a.number <=> b.number}.each do |round|
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if not round.done?
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return assign_maps_for_round(round)
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end
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end
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end
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private
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def create_round(round_number, n_contenders)
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round = @round_model.new(
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:mash_tournament_id => @tournament.id,
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:number => round_number,
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:mash_count => n_contenders / 2
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)
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round.save!
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n_contenders.times do
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@mash_model.new(
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:mash_tournament_id => @tournament.id,
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:mash_tournament_round_id => round.id
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).save!
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end
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end
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def assign_maps_for_round(round)
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if round.number == 1
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return assign_maps_for_round_one(round)
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end
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previous = @round_model.find_by_mash_tournament_id_and_number(
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@tournament.id, round.number - 1
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)
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previous_winners = previous.mashes.collect(&:winner_id)
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pool = @map_model.all(
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:order => 'RANDOM()',
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:conditions => ['id in ?', previous_winners]
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)
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filled_in = []
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round.mashes.each do |mash|
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mash.map_a = pool.pop.id
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mash.map_b = pool.pop.id
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mash.save!
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filled_in << mash
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end
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filled_in
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end
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def assign_maps_for_round_one(round)
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pool = @map_model.all(
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:order => 'RANDOM()',
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:limit => round.mash_count * 2
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)
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logger.info("Populating mashes from pool: #{pool.inspect}")
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filled_in = []
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round.mashes.each do |mash|
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map_a = pool.pop
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map_b = pool.pop
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logger.info("Assigning `map_a` from #{map_a.inspect}, " +
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"`map_b` from #{map_b.inspect} to mash #{mash.inspect}")
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mash.map_a = map_a
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mash.map_b = map_b
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mash.save!
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filled_in << mash
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end
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filled_in
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end
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end
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64
rails/map-mash/spec/lib/mash_tournament_builder_spec.rb
Normal file
64
rails/map-mash/spec/lib/mash_tournament_builder_spec.rb
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@ -0,0 +1,64 @@
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require 'spec_helper'
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describe MashTournamentBuilder do
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let(:subject) do
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MashTournamentBuilder.new(
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MashTournament.make(:requester => Requester.make),
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MashTournament, MashTournamentRound, Map, Mash
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)
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end
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let(:mock_subject) do
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@tournament = mock(Object)
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@tournament_model = mock(Object)
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@round_model = mock(Object)
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@map_model = mock(Object)
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@mash_model = mock(Object)
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MashTournamentBuilder.new(
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@tournament, @tournament_model,
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@round_model, @map_model, @mash_model
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)
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end
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context 'creating rounds' do
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it 'should reject invalid numbers of contenders' do
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[11, 24, 40].each do |n|
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expect do
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subject.create_rounds_for_contenders(n)
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end.to raise_error
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end
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end
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before(:all) do
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subject.map_model.destroy_all
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40.times do
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subject.map_model.make.save
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end
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end
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[[8, 3], [16, 4], [32, 5]].each do |n_contenders,n_rounds|
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context "for #{n_contenders} total contenders" do
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it "should create #{n_rounds} rounds" do
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subject.create_rounds_for_contenders(n_contenders)
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subject.tournament.total_rounds.should == n_rounds
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end
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end
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end
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end
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context 'filling in rounds' do
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before(:each) do
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subject.id.should_not be_nil
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subject.create_rounds_for_contenders(8)
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end
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xit 'should fill in every map for every mash in a given round' do
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subject.fill_in_next_round
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subject.round(1).mashes.each do |mash|
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mash.map_a.should_not be_nil
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mash.map_b.should_not be_nil
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end
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end
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end
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end
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@ -5,56 +5,7 @@ describe MashTournament do
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@valid_attributes = {:requester_id => 1}
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end
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before(:each) do
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@requester = Requester.make
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@requester.save!
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subject.requester_id = @requester.id
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subject.save!
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subject.reload
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end
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it "should create a new instance given valid attributes" do
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MashTournament.create!(@valid_attributes)
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end
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context 'creating rounds' do
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it 'should reject invalid numbers of contenders' do
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[11, 24, 40].each do |n|
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expect do
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subject.create_rounds_for_contenders(n)
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end.to raise_error
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end
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end
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before(:all) do
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Map.destroy_all
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40.times do
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Map.make.save
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end
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end
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[[8, 3], [16, 4], [32, 5]].each do |n_contenders,n_rounds|
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context "for #{n_contenders} total contenders" do
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it "should create #{n_rounds} rounds" do
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subject.create_rounds_for_contenders(n_contenders)
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subject.total_rounds.should == n_rounds
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end
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end
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end
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end
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context 'filling in rounds' do
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before(:each) do
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subject.id.should_not be_nil
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subject.create_rounds_for_contenders(8)
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end
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xit 'should fill in every map for every mash in a given round' do
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subject.fill_in_next_round
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subject.round(1).mashes.each do |mash|
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mash.map_a.should_not be_nil
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mash.map_b.should_not be_nil
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end
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end
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end
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end
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