[USER STORY 25] - Input Validation for WordGuessGame.

GameHistoryTracker.java

@@ -30,6 +30,9 @@ public void recordPlay(final String gameName, final Integer score) {
         if (score != null) {
             stats.totalScore += score;
             stats.scores.add(score);
+        } else if (score == null) {
+            System.out.println("Score is null");
+        return;
         }
         statsMap.put(gameName, stats);
     }

SudokuGame.java

@@ -19,6 +19,16 @@ public String getName() {
     @Override
     public Optional<Integer> play() {
         System.out.println("[Playing Sudoku - Placeholder]");
+	System.out.println("Welcome to Sudoku! You will be presented with"
+                        + " a 9x9 grid split into 9 different 3x3 grids."
+                        + " Some of the cells will already be filled in"
+                        + " with numbers. Each digit from 1-9 must"
+                        + " appear exactly once in every"
+                        + " row, column, and  3x3 grid. To solve the puzzle,"
+                        + " each cell must be filled in according to the"
+                        + " following conditions");
+
         return Optional.empty();
-    }
+
+	}
 }

WordGuessGame.java

@@ -1,5 +1,5 @@
 import java.util.Optional;
-
+import java.util.Scanner;
 /**
  * A word guessing game similar to Wordle.
  * The player has a limited number of attempts to guess a secret
@@ -12,7 +12,21 @@
  */
 class WordGuessGame implements Game {
 
-    @Override
+// Acceots 5 Alphabetic letters ASCII A-Z or a-z.//
+public String GuessCondition = "^[A-Za-z]{5}$";
+// Maximum number of attempts a player gets //
+public int MaxAttempts = 6;
+
+/**
+*Checks if a guess is valid, non-null, and alphabetic
+*
+*@param guess The user's guess.
+*@return true if valid, false otherwise,
+*/
+boolean isValidGuess(String guess) {
+	return guess != null && guess.matches(GuessCondition);
+}
+	@Override
     public String getName() {
         return "Word Guess";
     }
@@ -31,6 +45,39 @@ public Optional<Integer> play() {
             "Your score is determined by the number of attempts remaining"
             + " after you guessed the word correctly!"
         );
-        return Optional.empty();
-    }
+
+//Remaining attempts and user input// 
+int attemptsLeft = MaxAttempts;
+Scanner scanner = new Scanner(System.in);
+
+//Loop will continue while player has attempts remaining//
+while (attemptsLeft > 0) {
+String guess;
+
+//Loop prompts until a valid guess is entered//
+while (true) {
+	System.out.print
+("Enter a 5-Letter Word: ");
+	guess = scanner.nextLine();
+
+	if (!isValidGuess(guess)) {
+		System.out.println("Inavlid Input: Please enter 5 alphabetic letters (A-Z).");
+		continue;
+}
+	guess = guess.toUpperCase();
+	break;
+}
+
+//Valid input consumes one attempt//
+attemptsLeft--;
+System.out.println("Guess Accepted. Attempts Left: " + attemptsLeft);
+
+break;
+
+}
+
+return Optional.empty();
+
+}
+
 }