Hangman Rewrite

2025-09-11 17:58:26 -04:00 · 2021-09-27 02:00:19 +00:00
parent 68e96cd1bb
commit 486916944b
21 changed files with 2640 additions and 4835 deletions
--- a/src/NadekoBot/Modules/Games/Common/Hangman/HangmanGame.cs
+++ b/src/NadekoBot/Modules/Games/Common/Hangman/HangmanGame.cs
@@ -0,0 +1,122 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using AngleSharp.Text;
+
+namespace NadekoBot.Modules.Games.Hangman
+{
+    public sealed class HangmanGame
+    {
+        public enum Phase { Running, Ended }
+        public enum GuessResult { NoAction, AlreadyTried, Incorrect, Guess, Win }
+
+        public record State(
+            int Errors,
+            Phase Phase,
+            string Word,
+            GuessResult GuessResult,
+            List<char> missedLetters,
+            string ImageUrl)
+        {
+            public bool Failed => Errors > 5;
+        }
+
+        private Phase CurrentPhase { get; set; }
+        
+        private readonly HashSet<char> _incorrect = new();
+        private readonly HashSet<char> _correct = new();
+        private readonly HashSet<char> _remaining = new();
+
+        private readonly string _word;
+        private readonly string _imageUrl;
+
+        public HangmanGame(HangmanTerm term)
+        {
+            _word = term.Word;
+            _imageUrl = term.ImageUrl;
+            
+            _remaining = _word
+                .ToLowerInvariant()
+                .Where(x => x.IsLetter())
+                .Select(char.ToLowerInvariant)
+                .ToHashSet();
+        }
+
+        public State GetState(GuessResult guessResult = GuessResult.NoAction)
+            => new State(_incorrect.Count,
+                CurrentPhase,
+                CurrentPhase == Phase.Ended
+                    ? _word
+                    : GetScrambledWord(),
+                guessResult,
+                _incorrect.ToList(),
+                CurrentPhase == Phase.Ended
+                    ? _imageUrl
+                    : string.Empty);
+
+        private string GetScrambledWord()
+        {
+            Span<char> output = stackalloc char[_word.Length * 2];
+            for (var i = 0; i < _word.Length; i++)
+            {
+                var ch = _word[i];
+                if (ch == ' ')
+                    output[i*2] = ' ';
+                if (!ch.IsLetter() || !_remaining.Contains(char.ToLowerInvariant(ch)))
+                    output[i*2] = ch;
+                else
+                    output[i*2] = '_';
+
+                output[i * 2 + 1] = ' ';
+            }
+
+            return new(output);
+        }
+
+        // todo lock
+        public State Guess(string guess)
+        {
+            if (CurrentPhase != Phase.Running)
+                return GetState(GuessResult.NoAction);
+
+            guess = guess.Trim();
+            if (guess.Length > 1)
+            {
+                if (guess.Equals(_word, StringComparison.InvariantCultureIgnoreCase))
+                {
+                    CurrentPhase = Phase.Ended;
+                    return GetState(GuessResult.Win);
+                }
+
+                return GetState(GuessResult.NoAction);
+            }
+
+            var charGuess = guess[0];
+            if (!char.IsLetter(charGuess))
+                return GetState(GuessResult.NoAction);
+
+            if (_incorrect.Contains(charGuess) || _correct.Contains(charGuess))
+                return GetState(GuessResult.AlreadyTried);
+
+            if (_remaining.Remove(charGuess))
+            {
+                if (_remaining.Count == 0)
+                {
+                    CurrentPhase = Phase.Ended;
+                    return GetState(GuessResult.Win);
+                }
+
+                return GetState(GuessResult.Guess);
+            }
+
+            _incorrect.Add(charGuess);
+            if (_incorrect.Count > 5)
+            {
+                CurrentPhase = Phase.Ended;
+                return GetState(GuessResult.Incorrect);
+            }
+
+            return GetState(GuessResult.Incorrect);
+        }
+    }
+}