Implement Methods returning points of teams per match

These methods return group_points scored_points and received_points
respectively when given a team that is present in the match
They return 0 when given a team that isn't contesting in that match

app/models/match.rb

@@ -19,17 +19,47 @@ 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
+    return nil unless finished?
+
+    current_leading_team
+  end
+
   def group_match?
     group.present?
   end
 
+  def scored_points_of(team)
+    return 0 unless teams.include?(team)
+
+    match_scores.find_by(team: team).points
+  end
+
+  def received_points_of(team)
+    return 0 unless teams.include?(team)
+
+    match_scores.find { |ms| ms.team != team }.points
+  end
+
+  def group_points_of(team)
+    return 0 unless teams.include?(team)
+
+    case current_leading_team
+    when team
+      3
+    when nil
+      1
+    else
+      0
+    end
+  end
+
   private
 
   def stage_xor_group

spec/models/match_spec.rb

@@ -90,4 +90,67 @@ 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 '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