Improve words list, add dictionary

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.2
-app.versionCode=2
+app.versionName=0.0.3
+app.versionCode=3

lib/provider/data.dart

@@ -6,10 +6,12 @@ class Data extends ChangeNotifier {
   // Configuration available values
   List _availableLangValues = ['fr'];
   List _availableWordLengthValues = ['5'];
+  List _availableLevelValues = ['easy', 'normal'];
   List _availableSkinValues = ['default'];
 
   List get availableLangValues => _availableLangValues;
   List get availableWordLengthValues => _availableWordLengthValues;
+  List get availableLevelValues => _availableLevelValues;
   List get availableSkinValues => _availableSkinValues;
 
   // Application default configuration
@@ -17,6 +19,8 @@ class Data extends ChangeNotifier {
   String _langDefault = 'fr';
   String _length = '';
   String _lengthDefault = '5';
+  String _level = '';
+  String _levelDefault = 'normal';
   String _skin = '';
   String _skinDefault = 'default';
 
@@ -41,6 +45,12 @@ class Data extends ChangeNotifier {
     notifyListeners();
   }
 
+  String get level => _level;
+  void updateLevel(String level) {
+    _level = level;
+    notifyListeners();
+  }
+
   String get skin => _skin;
   void updateSkin(String skin) {
     _skin = skin;
@@ -86,6 +96,8 @@ class Data extends ChangeNotifier {
       break;
       case 'length': { return _length; }
       break;
+      case 'level': { return _level; }
+      break;
       case 'skin': { return _skin; }
       break;
     }
@@ -97,6 +109,8 @@ class Data extends ChangeNotifier {
       break;
       case 'length': { return _availableWordLengthValues; }
       break;
+      case 'level': { return _availableLevelValues; }
+      break;
       case 'skin': { return _availableSkinValues; }
       break;
     }
@@ -109,6 +123,8 @@ class Data extends ChangeNotifier {
       break;
       case 'length': { updateLength(parameterValue); }
       break;
+      case 'level': { updateLevel(parameterValue); }
+      break;
       case 'skin': { updateSkin(parameterValue); }
       break;
     }
@@ -120,6 +136,7 @@ class Data extends ChangeNotifier {
     final prefs = await SharedPreferences.getInstance();
     setParameterValue('lang', prefs.getString('lang') ?? _langDefault);
     setParameterValue('length', prefs.getString('length') ?? _lengthDefault);
+    setParameterValue('level', prefs.getString('level') ?? _levelDefault);
     setParameterValue('skin', prefs.getString('skin') ?? _skinDefault);
   }
 

lib/utils/game_utils.dart

@@ -28,7 +28,7 @@ class GameUtils {
     do {
       randomPickWord = RandomPickWord();
       int wordLength = int.parse(myProvider.length);
-      await randomPickWord.init(myProvider.lang, wordLength);
+      await randomPickWord.init(myProvider.lang, wordLength, myProvider.level);
 
       if (randomPickWord.word != '') {
         word = randomPickWord.word;

lib/utils/random_pick_word.dart

@@ -8,24 +8,46 @@ class RandomPickWord {
   static Set<String> wordList = <String>{};
   static Set<String> dictionary = <String>{};
   static int _length = 5;
+  static String _level = '';
 
   RandomPickWord();
 
   String _word = '';
   String get word => _word;
 
-  init(String lang, int length) async {
+  init(String lang, int length, String level) async {
     _length = length;
+    _level = level;
     _word = '';
-    await wordFromLocalFile(lang, length);
+    await wordFromLocalFile(lang, length, level);
   }
 
-  Future<void> wordFromLocalFile(String lang, int length) async {
-    if (length != _length || wordList.isEmpty || dictionary.isEmpty) {
+  Future<void> wordFromLocalFile(String lang, int length, String level) async {
+    if (length != _length || level != _level || wordList.isEmpty || dictionary.isEmpty) {
       _length = length;
+      _level = level;
       wordList.clear();
+
+      String wordBaseFilename = 'words-' + length.toString() + '-' + lang;
+
+      // Get full dictionnary (eligible words)
+      print('Reload dictionary');
+      try {
+        String wordsFile = wordBaseFilename + '-' + 'dictionnary';
+        var data = await rootBundle.loadString('assets/files/' + wordsFile + '.txt');
+        LineSplitter.split(data).forEach((line) {
+          if (line.length == length) {
+            dictionary.add(line.toUpperCase());
+          }
+        });
+      } catch (e) {
+        throw "Failed loading dictionary database";
+      }
+
+      // Get guessable words list (will pick random word from)
+      print('Reload words list (' + level + ')');
       try {
-        String wordsFile = 'words-' + length.toString() + '-' + lang;
+        String wordsFile = wordBaseFilename + '-' + level;
         var data = await rootBundle.loadString('assets/files/' + wordsFile + '.txt');
         LineSplitter.split(data).forEach((line) {
           if (line.length == length) {
@@ -35,9 +57,11 @@ class RandomPickWord {
       } catch (e) {
         throw "Failed loading words database";
       }
+
     }
 
-    print('Words found in file: ' + wordList.length.toString());
+    print('Words in dictionary: ' + dictionary.length.toString());
+    print('Words in words list: ' + wordList.length.toString());
 
     // Check we have enough words
     if (wordList.length < 1) {