feat: manager that uses the words from the dictionnary in ~/res/

src/WordManager.java

@@ -0,0 +1,51 @@
+import java.io.*;
+import java.util.*;
+
+public class WordManager {
+
+    private static final String FILE_PATH = "../res/hangman_words.txt";
+
+    private final Map<String, List<String>> wordsByDifficulty = new HashMap<>();
+
+    public WordManager() throws IOException {
+        wordsByDifficulty.put("EASY", new ArrayList<>());
+        wordsByDifficulty.put("MEDIUM", new ArrayList<>());
+        wordsByDifficulty.put("HARD", new ArrayList<>());
+        loadWords();
+    }
+
+    private void loadWords() throws IOException {
+        try (BufferedReader reader = new BufferedReader(new FileReader(FILE_PATH))) {
+            String line;
+            String section = "";
+            while ((line = reader.readLine()) != null) {
+                line = line.trim();
+                if (line.startsWith("#")) {
+                    section = line.substring(1).toUpperCase();
+                } else if (!line.isEmpty() && wordsByDifficulty.containsKey(section)) {
+                    wordsByDifficulty.get(section).add(line.toLowerCase()); // make all words lowercase
+                }
+            }
+        } catch (FileNotFoundException e) {
+            throw new IOException("File not found: " + FILE_PATH);
+        }
+    }
+
+    public String getRandomWord(int difficulty) {
+        String key = mapDifficulty(difficulty);
+        List<String> list = wordsByDifficulty.get(key);
+        if (list == null || list.isEmpty()) return null;
+
+        Random rand = new Random();
+        return list.get(rand.nextInt(list.size()));
+    }
+
+    private String mapDifficulty(int difficulty) {
+        return switch (difficulty) {
+            case 1 -> "EASY";
+            case 2 -> "MEDIUM";
+            case 3 -> "HARD";
+            default -> "EASY"; // Default value
+        };
+    }
+}