Sube carpetas API, API.Tests, Application y Domain del Backend

Club12-Backend/Application/Utils/Helper/Series/SeriesDecisionCalculator.cs

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+using Domain.Entities.Models;
+
+using System;
+using System.Linq;
+
+namespace Application.Utils.Helper.Series;
+
+/// <summary>
+/// Determines whether a best-of-N playoff series has been decided yet.
+/// </summary>
+public static class SeriesDecisionCalculator
+{
+    /// <summary>
+    /// Returns the winning team's id once one team has won more than half of the series' BestOf games, based on finished games recorded so far.
+    /// </summary>
+    public static Guid? DetermineWinner(MatchSeries series)
+    {
+        int winsNeeded = (series.BestOf / 2) + 1;
+
+        int homeWins = series.Matches.Count(game => game.IsFinished && game.WinningTeamId == series.HomeTeamId);
+        if (homeWins >= winsNeeded)
+        {
+            return series.HomeTeamId;
+        }
+
+        int visitorWins = series.Matches.Count(game => game.IsFinished && game.WinningTeamId == series.VisitorTeamId);
+        return visitorWins >= winsNeeded ? series.VisitorTeamId : null;
+    }
+}