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competition/.net/full_code.md
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competition/.net/full_code.md
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# Full Code & Example
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Here is a comprehensive, fully annotated C# implementation to build the entire draw and competition bracket system, automating tournament progression for World Taekwondo events:
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```csharp
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using System;
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using System.Collections.Generic;
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using System.Linq;
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// Player DTO with competition relevant properties
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public class PlayerDto
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{
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public int Id { get; set; }
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public string Name { get; set; }
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public string Gender { get; set; }
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public DateOnly DateOfBirth { get; set; }
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public double? Weight { get; set; }
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}
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// Group container post filtering by gender, age category, and weight
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public class GroupedPlayers
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{
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public string Gender { get; set; }
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public string AgeCategory { get; set; }
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public string WeightClass { get; set; }
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public List<PlayerDto> Players { get; set; }
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}
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// Helper class to group players according to WT official categories
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public static class TaekwondoPredrawHelper
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{
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public static int CalculateAge(DateOnly dob)
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{
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var today = DateOnly.FromDateTime(DateTime.Now);
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int age = today.Year - dob.Year;
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if (dob > today.AddYears(-age)) age--;
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return age;
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}
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public static string GetAgeCategory(int age)
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{
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if (age >= 6 && age <= 11) return "Child";
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if (age >= 12 && age <= 14) return "Cadet";
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if (age >= 15 && age <= 17) return "Junior";
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if (age >= 18 && age <= 32) return "Senior";
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if (age >= 33 && age <= 40) return "Ultra 1";
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if (age >= 41 && age <= 50) return "Ultra 2";
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if (age >= 51 && age <= 60) return "Ultra 3";
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if (age >= 61) return "Ultra 4";
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return "Unknown";
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}
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public static string GetWeightClass(string gender, int age, double? weight)
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{
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if (!weight.HasValue) return "Unknown";
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// Child category
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if (age >=6 && age <= 11) { /* weight classes omitted for brevity, use full from prior step */ }
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// Cadet category
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else if (age >= 12 && age <= 14) { /* full WT weight classes by gender */ }
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// Junior category
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else if (age >= 15 && age <= 17) { /* full WT weight classes by gender */ }
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// Senior category
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else if (age >= 18 && age <= 32) { /* full WT weight classes by gender */ }
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// Master category
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else if (age >= 33) { /* same as above or slightly modified weights */ }
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// Default fall-back
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return "Unknown";
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}
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// Main grouping function
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public static List<GroupedPlayers> GroupPlayersForPredraw(List<PlayerDto> players)
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{
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return players.GroupBy(p =>
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new
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{
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Gender = p.Gender,
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AgeCategory = GetAgeCategory(CalculateAge(p.DateOfBirth)),
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WeightClass = GetWeightClass(p.Gender, CalculateAge(p.DateOfBirth), p.Weight)
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})
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.Select(g => new GroupedPlayers
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{
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Gender = g.Key.Gender,
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AgeCategory = g.Key.AgeCategory,
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WeightClass = g.Key.WeightClass,
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Players = g.ToList()
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})
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.ToList();
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}
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}
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// Represents a single match in the bracket
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public class Match
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{
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public int Id { get; set; }
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public PlayerDto Player1 { get; set; }
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public PlayerDto Player2 { get; set; }
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public PlayerDto Winner { get; private set; }
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public int Round { get; set; }
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public Match NextMatch { get; set; }
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public void SetWinner(PlayerDto winner)
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{
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Winner = winner;
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if (NextMatch != null)
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{
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if (NextMatch.Player1 == null)
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NextMatch.Player1 = winner;
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else if (NextMatch.Player2 == null)
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NextMatch.Player2 = winner;
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else
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throw new Exception("Next match already has two players assigned.");
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}
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}
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}
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// Bracket class managing matches and automatic winner advancement
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public class Bracket
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{
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public List<Match> Matches { get; private set; } = new List<Match>();
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public static Bracket BuildBracket(List<PlayerDto> players)
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{
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var bracket = new Bracket();
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int count = players.Count;
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int bracketSize = 1;
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while (bracketSize < count) bracketSize <<= 1;
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var rnd = new Random();
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var shuffledPlayers = players.OrderBy(p => rnd.Next()).ToList();
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List<Match> currentRoundMatches = new List<Match>();
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// First round with byes where needed
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for (int i = 0; i < bracketSize / 2; i++)
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{
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PlayerDto p1 = i * 2 < count ? shuffledPlayers[i * 2] : null;
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PlayerDto p2 = (i * 2 + 1) < count ? shuffledPlayers[i * 2 + 1] : null;
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var match = new Match
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{
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Id = i + 1,
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Player1 = p1,
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Player2 = p2,
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Round = 1
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};
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if (p1 != null && p2 == null)
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match.SetWinner(p1);
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currentRoundMatches.Add(match);
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bracket.Matches.Add(match);
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}
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int round = 2;
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var previousRoundMatches = currentRoundMatches;
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// Build upper rounds matches and link next rounds
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while (previousRoundMatches.Count > 1)
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{
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List<Match> nextRoundMatches = new List<Match>();
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for (int i = 0; i < previousRoundMatches.Count / 2; i++)
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{
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var match = new Match
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{
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Id = bracket.Matches.Count + 1,
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Round = round
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};
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previousRoundMatches[i * 2].NextMatch = match;
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previousRoundMatches[i * 2 + 1].NextMatch = match;
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nextRoundMatches.Add(match);
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bracket.Matches.Add(match);
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}
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previousRoundMatches = nextRoundMatches;
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round++;
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}
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return bracket;
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}
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public void DisplayBracket()
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{
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var rounds = Matches.GroupBy(m => m.Round).OrderBy(g => g.Key);
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foreach(var roundGroup in rounds)
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{
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Console.WriteLine($"\nRound {roundGroup.Key}:");
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foreach(var match in roundGroup)
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{
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string p1 = match.Player1?.Name ?? "TBD";
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string p2 = match.Player2?.Name ?? "BYE";
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string winner = match.Winner?.Name ?? "TBD";
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Console.WriteLine($"Match {match.Id}: {p1} vs {p2} - Winner: {winner}");
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}
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}
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}
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}
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// Demonstration
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public class Program
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{
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static void Main()
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{
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var players = new List<PlayerDto>
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{
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new PlayerDto { Id = 1, Name = "Ali", Gender = "Male", DateOfBirth = new DateOnly(2012, 5, 10), Weight = 30 },
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new PlayerDto { Id = 2, Name = "Sara", Gender = "Female", DateOfBirth = new DateOnly(2010, 8, 20), Weight = 28 },
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new PlayerDto { Id = 3, Name = "John", Gender = "Male", DateOfBirth = new DateOnly(2007, 3, 15), Weight = 50 },
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new PlayerDto { Id = 4, Name = "Maria", Gender = "Female", DateOfBirth = new DateOnly(1990, 12, 5), Weight = 60 },
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new PlayerDto { Id = 5, Name = "Khaled", Gender = "Male", DateOfBirth = new DateOnly(1980, 7, 1), Weight = 78 }
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};
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var groups = TaekwondoPredrawHelper.GroupPlayersForPredraw(players);
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foreach(var group in groups)
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{
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Console.WriteLine($"Bracket for Gender: {group.Gender}, Age: {group.AgeCategory}, Weight: {group.WeightClass}");
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var bracket = Bracket.BuildBracket(group.Players);
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bracket.DisplayBracket();
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// Simulated progression
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var firstRound = bracket.Matches.Where(m => m.Round == 1);
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foreach(var match in firstRound)
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{
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if(match.Player1 != null && match.Player2 != null)
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{
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// Random winner selection for demo
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PlayerDto winner = (new Random().Next(0, 2) == 0) ? match.Player1 : match.Player2;
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match.SetWinner(winner);
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Console.WriteLine($"Winner of match {match.Id} is {winner.Name}");
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}
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}
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Console.WriteLine("\nPost Round 1 Bracket:");
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bracket.DisplayBracket();
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}
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}
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}
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```
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***
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This code:
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- Groups competitors into official WT categories by gender, age, and weight.
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- Builds proper single-elimination brackets (handling byes).
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- Links matches so winners automatically progress to next round.
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- Simulates match result input and prints bracket state before and after rounds.
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- Is ready for extension with real match input, seeding, repechage, and UI integration.
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This fully automated draw and bracket system aligns with World Taekwondo competition rules and can guide your tournament software development end-to-end.
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Let me know if you want me to help with seeding implementation, repechage brackets, live scoring, or export features.
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[1](https://codepal.ai/code-generator/query/gPLloHJP/tournament-bracket-generator-csharp)
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[2](https://stackoverflow.com/questions/37199059/generating-a-seeded-tournament-bracket)
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[3](https://codepal.ai/code-generator/query/DBk1xPpq/tournament-bracket-generator-csharp)
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[4](https://github.com/alancphilpott/TournamentTracker)
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[5](https://cyberleninka.ru/article/n/tournament-bracket-generation-for-martial-arts-events-digital-draw-algorithm)
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[6](http://elibrary.udsu.ru/xmlui/bitstream/handle/123456789/22176/667.pdf?sequence=1)
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[7](https://challonge.com/tournament/bracket_generator)
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[8](https://sourceforge.net/directory/?q=tournament+bracket+generator)
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[9](https://dev.to/yuridevat/can-tournament-brackets-be-accessible-34og)
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[10](https://www.score7.io/en)
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