Merge pull request #50 from turniere/ticket/TURNIERE-216

Implement Group Score Update on match_score points change

app/controllers/match_scores_controller.rb

@@ -13,6 +13,7 @@ class MatchScoresController < ApplicationController
   # PATCH/PUT /scores/1
   def update
     if @match_score.update(match_score_params)
+      UpdateGroupsGroupScoresAndSave.call(group: @match_score.match.group) if @match_score.part_of_group_match?
       render json: @match_score
     else
       render json: @match_score.errors, status: :unprocessable_entity

app/interactors/update_groups_group_scores.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class UpdateGroupsGroupScores
+  include Interactor
+
+  def call
+    context.object_to_save = GroupStageService.update_group_scores(context.group)
+  rescue StandardError
+    context.fail!
+  end
+end

app/models/group_score.rb

@@ -3,7 +3,4 @@
 class GroupScore < ApplicationRecord
   belongs_to :team
   belongs_to :group
-
-  # :)
-  alias_attribute :received_points, :recieved_points
 end

app/models/match.rb

@@ -19,17 +19,41 @@ class Match < ApplicationRecord
     stage ? stage.owner : group.owner
   end
 
-  def winner
-    return nil unless finished?
+  def current_leading_team
     return nil if match_scores.first.points == match_scores.second.points
 
     match_scores.max_by(&:points).team
   end
 
+  def winner
+    finished? ? current_leading_team : nil
+  end
+
   def group_match?
     group.present?
   end
 
+  def scored_points_of(team)
+    teams.include?(team) ? match_scores.find_by(team: team).points : 0
+  end
+
+  def received_points_of(team)
+    teams.include?(team) ? match_scores.find { |ms| ms.team != team }.points : 0
+  end
+
+  def group_points_of(team)
+    return 0 unless (finished? || in_progress?) && teams.include?(team)
+
+    case current_leading_team
+    when team
+      3
+    when nil
+      1
+    else
+      0
+    end
+  end
+
   private
 
   def stage_xor_group

app/models/match_score.rb

@@ -5,4 +5,8 @@ class MatchScore < ApplicationRecord
   belongs_to :team
 
   delegate :owner, to: :match
+
+  def part_of_group_match?
+    match.group_match?
+  end
 end

app/organizers/update_groups_group_scores_and_save.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class UpdateGroupsGroupScoresAndSave
+  include Interactor::Organizer
+
+  organize UpdateGroupsGroupScores, SaveApplicationRecordObject
+end

app/services/group_stage_service.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 class GroupStageService
-  def self.generate_group_stage(groups)
+  class << self
+    def generate_group_stage(groups)
       raise 'Cannot generate group stage without groups' if groups.length.zero?
 
       # raise an error if the average group size is not a whole number
@@ -11,11 +12,12 @@ class GroupStageService
       Stage.new level: -1, groups: groups
     end
 
-  def self.get_group_object_from(team_array)
-    Group.new matches: generate_all_matches_between(team_array)
+    def get_group_object_from(team_array)
+      Group.new matches: generate_all_matches_between(team_array),
+                group_scores: team_array.map { |team| GroupScore.new team: team }
     end
 
-  def self.generate_all_matches_between(teams)
+    def generate_all_matches_between(teams)
       matches = []
       teams.combination(2).to_a # = matchups
            .each_with_index do |matchup, i|
@@ -29,4 +31,29 @@ class GroupStageService
       end
       matches
     end
+
+    # Updates all group_scores of the given group
+    #
+    # @param group Group the group to update the group_scores in
+    # @return [Array] the changed group_scores that need to be saved
+    def update_group_scores(group)
+      changed_group_scores = []
+      group.teams.each do |team|
+        group_score = group.group_scores.find_by(team: team)
+        matches = group.matches.select { |match| match.teams.include? team }
+        # reset previous values
+        group_score.group_points = 0
+        group_score.scored_points = 0
+        group_score.received_points = 0
+        matches.each do |match|
+          # calculate points for every match
+          group_score.group_points += match.group_points_of team
+          group_score.scored_points += match.scored_points_of team
+          group_score.received_points += match.received_points_of team
+        end
+        changed_group_scores << group_score
+      end
+      changed_group_scores
+    end
+  end
 end

db/migrate/0000_create_schema.rb

@@ -104,7 +104,7 @@ class CreateSchema < ActiveRecord::Migration[5.2]
     create_table :group_scores do |t|
       t.integer :group_points, default: 0
       t.integer :scored_points, default: 0
-      t.integer :recieved_points, default: 0
+      t.integer :received_points, default: 0
 
       t.belongs_to :team, index: true, foreign_key: { on_delete: :cascade }, null: false
       t.belongs_to :group, index: true, foreign_key: { on_delete: :cascade }, null: false

spec/controllers/match_scores_controller_spec.rb

@@ -34,7 +34,7 @@ RSpec.describe MatchScoresController, type: :controller do
         before(:each) do
           apply_authentication_headers_for @owner
         end
-
+        context 'when match_score update succeeds' do
           it 'updates the requested score' do
             put :update, params: { id: @match_score.to_param }.merge(valid_update)
             @match_score.reload
@@ -49,6 +49,20 @@ RSpec.describe MatchScoresController, type: :controller do
           end
         end
 
+        context 'when match_score update fails' do
+          before do
+            allow_any_instance_of(MatchScore)
+              .to receive(:update)
+              .and_return(false)
+          end
+
+          it 'returns unprocessable entity' do
+            put :update, params: { id: @match_score.to_param }.merge(valid_update)
+            expect(response).to have_http_status(:unprocessable_entity)
+          end
+        end
+      end
+
       context 'as another user' do
         before(:each) do
           apply_authentication_headers_for create(:user)
@@ -61,4 +75,45 @@ RSpec.describe MatchScoresController, type: :controller do
       end
     end
   end
+
+  describe 'on a real tournament' do
+    before do
+      @owner = create(:user)
+      @tournament = create(:group_stage_tournament, stage_count: 0, match_factory: :filled_group_match, owner: @owner)
+      @group = @tournament.stages.first.groups.first
+      @match_score = @group.matches.first.match_scores.first
+    end
+
+    let(:valid_update) do
+      {
+        points: 42
+      }
+    end
+
+    describe 'updating a match_score' do
+      before(:each) do
+        apply_authentication_headers_for @owner
+        expect(UpdateGroupsGroupScoresAndSave).to receive(:call).once.with(group: @group).and_return(context)
+      end
+
+      shared_examples_for 'successful_update_of_match_score' do
+        it 'returns a 200 status code' do
+          put :update, params: { id: @match_score.to_param }.merge(valid_update)
+          expect(response).to be_successful
+        end
+      end
+
+      context 'when group_score calculation succeeds' do
+        let(:context) { double(:context, success?: true) }
+
+        it_should_behave_like 'successful_update_of_match_score'
+      end
+
+      context 'when group_score calculation fails' do
+        let(:context) { double(:context, success?: false) }
+
+        it_should_behave_like 'successful_update_of_match_score'
+      end
+    end
+  end
 end

spec/controllers/statistics_controller_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe StatisticsController, type: :controller do
 
     context 'tournament with a group stage' do
       before do
-        @tournament = create(:group_stage_only_tournament)
+        @tournament = create(:group_stage_tournament, stage_count: 0)
         @group_stage = @tournament.stages.find_by(level: -1)
         @most_dominant_score = create(:group_score,
                                       team: @tournament.teams.first,

spec/factories/groups.rb

@@ -4,13 +4,17 @@ FactoryBot.define do
   factory :group do
     transient do
       match_count { 4 }
+      match_factory { :group_match }
     end
 
     sequence(:number)
     stage
 
     after(:create) do |group, evaluator|
-      create_list(:group_match, evaluator.match_count, group: group)
+      create_list(evaluator.match_factory, evaluator.match_count, group: group)
+      group.group_scores = group.teams.map do |team|
+        create(:group_score, team: team, group: group)
+      end
     end
   end
 end

spec/factories/matches.rb

@@ -34,14 +34,18 @@ FactoryBot.define do
   factory :group_match, class: Match do
     group
     position { 0 }
-    factory :running_group_match do
+    factory :filled_group_match do
       transient do
         match_scores_count { 2 }
       end
+
+      factory :running_group_match do
+        state { :in_progress }
+      end
+
       after(:create) do |match, evaluator|
         match.match_scores = create_list(:match_score, evaluator.match_scores_count)
       end
-      state { :in_progress }
     end
 
     factory :undecided_group_match do

spec/factories/stages.rb

@@ -7,9 +7,10 @@ FactoryBot.define do
       level { -1 }
       transient do
         group_count { 4 }
+        match_factory { :group_match }
       end
       after(:create) do |stage, evaluator|
-        stage.groups = create_list(:group, evaluator.group_count)
+        stage.groups = create_list(:group, evaluator.group_count, match_factory: evaluator.match_factory)
       end
     end
 

spec/factories/tournaments.rb

@@ -12,15 +12,6 @@ FactoryBot.define do
       tournament.teams = create_list(:team, evaluator.teams_count, tournament: tournament)
     end
 
-    factory :group_stage_only_tournament do
-      transient do
-        group_count { 2 }
-      end
-      after(:create) do |tournament, evaluator|
-        tournament.stages << create(:group_stage, group_count: evaluator.group_count)
-      end
-    end
-
     factory :stage_tournament do
       transient do
         stage_count { 1 }
@@ -44,8 +35,14 @@ FactoryBot.define do
       end
 
       factory :group_stage_tournament do
-        after(:create) do |tournament, _evaluator|
-          tournament.stages << create(:group_stage)
+        transient do
+          group_count { 2 }
+          match_factory { :group_match }
+        end
+        after(:create) do |tournament, evaluator|
+          tournament.stages << create(:group_stage,
+                                      match_factory: evaluator.match_factory,
+                                      group_count: evaluator.group_count)
         end
       end
     end

spec/interactors/add_group_stage_to_tournament_interactor_spec.rb

@@ -11,7 +11,7 @@ RSpec.describe AddGroupStageToTournament do
 
   before do
     @empty_tournament = create(:stageless_tournament)
-    @group_stage_tournament = create(:group_stage_only_tournament, group_count: 0)
+    @group_stage_tournament = create(:group_stage_tournament, stage_count: 0, group_count: 0)
     @group_stage = create(:group_stage)
     @groups = Hash[1 => create_list(:team, 4), 2 => create_list(:team, 4)].values
   end

spec/interactors/add_playoffs_to_tournament_interactor_spec.rb

@@ -14,7 +14,7 @@ RSpec.describe AddPlayoffsToTournament do
   end
 
   before do
-    @group_stage_tournament = create(:group_stage_only_tournament, group_count: 0)
+    @group_stage_tournament = create(:group_stage_tournament, stage_count: 0, group_count: 0)
     @playoff_stage_tournament = create(:stageless_tournament)
     @full_tournament = create(:dummy_stage_tournament)
     @stages = create_list(:stage, 3)

spec/interactors/update_groups_group_scores_interactor_spec.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+RSpec.describe UpdateGroupsGroupScores do
+  before do
+    @group = create(:group)
+    @group_scores = create_list(:group_score, 2)
+  end
+
+  context 'save succeeds' do
+    let(:context) do
+      UpdateGroupsGroupScores.call(group: @group)
+    end
+
+    before do
+      allow(GroupStageService)
+        .to receive(:update_group_scores).with(@group)
+                                         .and_return(@group_scores)
+    end
+
+    it 'succeeds' do
+      expect(context).to be_a_success
+    end
+
+    it 'provides the objects to save' do
+      expect(context.object_to_save).to eq(@group_scores)
+    end
+  end
+
+  context 'exception is thrown' do
+    let(:context) do
+      UpdateGroupsGroupScores.call(group: @group)
+    end
+    before do
+      allow(GroupStageService)
+        .to receive(:update_group_scores).with(@group)
+                                         .and_throw('This failed :(')
+    end
+
+    it 'fails' do
+      test = context.failure?
+      expect(test).to eq(true)
+    end
+  end
+end

spec/models/match_score_spec.rb

@@ -7,4 +7,14 @@ RSpec.describe MatchScore, type: :model do
     it { should belong_to :match }
     it { should belong_to :team }
   end
+
+  describe '#part_of_group_match?' do
+    it 'is part of a group match' do
+      expect(create(:running_group_match).match_scores.first.part_of_group_match?).to eq(true)
+    end
+
+    it 'isn\'t part of a group match' do
+      expect(create(:running_playoff_match).match_scores.first.part_of_group_match?).to eq(false)
+    end
+  end
 end

spec/models/match_spec.rb

@@ -90,4 +90,86 @@ RSpec.describe Match, type: :model do
       end
     end
   end
+
+  context '#points_of' do
+    before do
+      @match = create(:running_group_match)
+      teams = @match.teams
+      @team1 = teams.first
+      @team2 = teams.second
+      @uninvolved_team = create(:team)
+    end
+    context 'even match' do
+      before do
+        @match.match_scores.each do |ms|
+          ms.points = 34
+          ms.save!
+        end
+      end
+
+      it 'returns correct group_points' do
+        expect(@match.group_points_of(@team1)).to be(1)
+        expect(@match.group_points_of(@team2)).to be(1)
+        expect(@match.group_points_of(@uninvolved_team)).to be(0)
+      end
+
+      it 'returns correct scored_points' do
+        expect(@match.scored_points_of(@team1)).to be(34)
+        expect(@match.scored_points_of(@team2)).to be(34)
+        expect(@match.scored_points_of(@uninvolved_team)).to be(0)
+      end
+
+      it 'returns correct received_points' do
+        expect(@match.received_points_of(@team1)).to be(34)
+        expect(@match.received_points_of(@team2)).to be(34)
+        expect(@match.received_points_of(@uninvolved_team)).to be(0)
+      end
+    end
+
+    context 'not started match' do
+      before do
+        @not_started_match = create(:running_group_match, state: :not_started)
+        @team1 = @not_started_match.teams.first
+      end
+
+      it 'returns correct group_points' do
+        expect(@not_started_match.group_points_of(@team1)).to be(0)
+      end
+
+      it 'returns correct scored_points' do
+        expect(@match.scored_points_of(@team1)).to be(0)
+      end
+
+      it 'returns correct received_points' do
+        expect(@match.received_points_of(@team1)).to be(0)
+      end
+    end
+
+    context 'uneven match' do
+      before do
+        @match.match_scores.each do |ms|
+          ms.points = ms.team == @team1 ? 42 : 17
+          ms.save!
+        end
+      end
+
+      it 'returns correct group_points' do
+        expect(@match.group_points_of(@team1)).to be(3)
+        expect(@match.group_points_of(@team2)).to be(0)
+        expect(@match.group_points_of(@uninvolved_team)).to be(0)
+      end
+
+      it 'returns correct scored_points' do
+        expect(@match.scored_points_of(@team1)).to be(42)
+        expect(@match.scored_points_of(@team2)).to be(17)
+        expect(@match.scored_points_of(@uninvolved_team)).to be(0)
+      end
+
+      it 'returns correct received_points' do
+        expect(@match.received_points_of(@team1)).to be(17)
+        expect(@match.received_points_of(@team2)).to be(42)
+        expect(@match.received_points_of(@uninvolved_team)).to be(0)
+      end
+    end
+  end
 end

spec/services/group_stage_service_spec.rb

@@ -2,29 +2,34 @@
 
 RSpec.describe GroupStageService do
   before do
-    @stage = create(:stage)
     @teams1 = create_list(:team, 4)
     @teams2 = create_list(:team, 4)
-    @groups = Hash[1 => @teams1, 2 => @teams2].values
+    @prepared_groups = Hash[1 => @teams1, 2 => @teams2].values
   end
   describe '#generate_group_stage method' do
     it 'returns a stage object' do
-      group_stage = GroupStageService.generate_group_stage(@groups)
+      group_stage = GroupStageService.generate_group_stage(@prepared_groups)
       expect(group_stage).to be_a(Stage)
     end
 
     it 'returns a stage object with level -1' do
-      group_stage_level = GroupStageService.generate_group_stage(@groups).level
+      group_stage_level = GroupStageService.generate_group_stage(@prepared_groups).level
       expect(group_stage_level).to be(-1)
     end
 
     it 'adds the provided groups to the stage' do
-      group_stage_teams = GroupStageService.generate_group_stage(@groups).teams
-      expect(group_stage_teams).to match_array(@groups.flatten)
+      group_stage_teams = GroupStageService.generate_group_stage(@prepared_groups).teams
+      expect(group_stage_teams).to match_array(@prepared_groups.flatten)
+    end
+
+    it 'adds GroupScore objects for every team present in the group' do
+      group_stage = GroupStageService.generate_group_stage(@prepared_groups)
+      teams_in_group_scores = group_stage.groups.map { |g| g.group_scores.map(&:team) }.flatten
+      expect(teams_in_group_scores).to match_array(@prepared_groups.flatten)
     end
 
     it 'raises exception when given different sizes of groups' do
-      unequal_groups = @groups
+      unequal_groups = @prepared_groups
       unequal_groups.first.pop
       expect { GroupStageService.generate_group_stage(unequal_groups) }
         .to raise_exception 'Groups need to be equal size'
@@ -72,4 +77,72 @@ RSpec.describe GroupStageService do
       end
     end
   end
+
+  describe '#update_group_scores' do
+    shared_examples_for 'only_return_group_scores' do
+      it 'only returns group_scores' do
+        @changed_group_scores.each do |gs|
+          expect(gs).to be_a(GroupScore)
+        end
+      end
+    end
+
+    context 'with only undecided matches' do
+      before do
+        @group = create(:group, match_factory: :running_group_match)
+        @group.matches.each do |match|
+          match.match_scores.each do |ms|
+            ms.points = 42
+            ms.save!
+          end
+        end
+        @changed_group_scores = GroupStageService.update_group_scores(@group)
+      end
+
+      it 'assigns one point to every team' do
+        @changed_group_scores.map(&:group_points).each do |points|
+          expect(points).to be(1)
+        end
+      end
+
+      it 'returns correct values for received_points' do
+        @changed_group_scores.map(&:received_points).each do |points|
+          expect(points).to be(42)
+        end
+      end
+
+      it 'returns correct values for scored_points' do
+        @changed_group_scores.map(&:scored_points).each do |points|
+          expect(points).to be(42)
+        end
+      end
+
+      it_should_behave_like 'only_return_group_scores'
+    end
+
+    context 'with only decided matches' do
+      before do
+        @group = create(:group, match_factory: :running_group_match)
+        @group.matches.each_with_index do |match, i|
+          match.match_scores.each_with_index do |ms, j|
+            match_score_number = i + j
+            ms.points = match_score_number
+            ms.save!
+          end
+        end
+        @changed_group_scores = GroupStageService.update_group_scores(@group)
+      end
+
+      it 'assigns the right amount of points' do
+        winning_teams = @changed_group_scores.select { |gs| gs.group_points == 3 }
+        losing_teams = @changed_group_scores.select { |gs| gs.group_points == 0 }
+        # Assure that half of the teams won and got 3 points
+        expect(winning_teams.size).to be(@changed_group_scores.size / 2)
+        # and half of them lost and got 0
+        expect(losing_teams.size).to be(@changed_group_scores.size / 2)
+      end
+
+      it_should_behave_like 'only_return_group_scores'
+    end
+  end
 end