added learn state

js/example.json

@@ -0,0 +1,38 @@
+{
+  "name": "example",
+  "questions": [
+    {
+      "quest": "Q1",
+      "answers": [
+        "A",
+        "B",
+        "C",
+        "D"
+      ],
+      "correct": 0,
+      "explanation": "not close"
+    },
+    {
+      "quest": "Q2",
+      "answers": [
+        "A",
+        "B",
+        "C",
+        "D"
+      ],
+      "correct": 0,
+      "explanation": "not close"
+    },
+    {
+      "quest": "Q3",
+      "answers": [
+        "A",
+        "B",
+        "C",
+        "D"
+      ],
+      "correct": 0,
+      "explanation": "not close"
+    }
+  ]
+}

lib/learn.dart

@@ -3,46 +3,69 @@ import 'package:ju_learn/main.dart';
 
 class QuizPage extends StatefulWidget {
   Vault v;
-  QuizPage(this.v, {super.key});
+  Function saveState;
+  QuizPage(this.v, this.saveState, {super.key});
 
   @override
   // ignore: no_logic_in_create_state, library_private_types_in_public_api
-  _QuizPageState createState() {
-    v.randomize();
-    return _QuizPageState(v);
-  }
+  _QuizPageState createState() => _QuizPageState(v, saveState);
 }
 
 class _QuizPageState extends State<QuizPage> {
-  int _currentQuestionIndex = 0;
-  int ask_state = -1;
-  int _score = 0;
+  int run = 0;
+  Question _currentQuestion = Question("Dummy", ["Dummy aws"], 0, "dummy");
+  int askState = -1;
   Vault v;
-  _QuizPageState(this.v);
+  Function saveState;
+  _QuizPageState(this.v, this.saveState) {
+    _currentQuestion.drawer = 0x0fffffff;
+    v.softReset();
+    _nextQuestion();
+  }
 
   void _checkAnswer(int selectedIndex) {
-    //if (selectedIndex == v.questions[_currentQuestionIndex].correct) {
-    //  setState(() {
-    //    _score++;
-    //  });
-    //}
+    if (selectedIndex == _currentQuestion.correct) {
+      _currentQuestion.drawer++;
+    } else {
+      _currentQuestion.drawer = 0;
+    }
+    _currentQuestion.lastInRun = run;
+    saveState();
     setState(() {
-      ask_state = selectedIndex;
+      askState = selectedIndex;
     });
   }
 
   void _nextQuestion() {
-    setState(() {
-      if (_currentQuestionIndex < v.questions.length - 1) {
-        ask_state = -1;
-        _currentQuestionIndex++;
-      } else {
-        _showResultDialog();
+    Question lowestQ = _currentQuestion;
+    for (var a in v.questions) {
+      if (a == _currentQuestion) continue;
+      int i = a.drawer - lowestQ.drawer;
+      if (i > 1) {
+        continue;
       }
+      if (i < -1) {
+        lowestQ = a;
+        continue;
+      }
+      if ((run - a.lastInRun - 10).abs() -
+              (run - lowestQ.lastInRun - 10).abs() <
+          0) {
+        lowestQ = a;
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _currentQuestion = lowestQ;
+        askState = -1;
       });
+    } else {
+      _currentQuestion = lowestQ;
+    }
+    run++;
   }
 
-  void _showResultDialog() {
+  /*void _showResultDialog() {
     showDialog(
       context: context,
       builder: (BuildContext context) {
@@ -64,7 +87,7 @@ class _QuizPageState extends State<QuizPage> {
         );
       },
     );
-  }
+  }*/
 
   @override
   Widget build(BuildContext context) {
@@ -78,40 +101,38 @@ class _QuizPageState extends State<QuizPage> {
           crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [
             Text(
-              v.questions[_currentQuestionIndex].quest,
+              _currentQuestion.quest,
               style: const TextStyle(
                 fontSize: 20.0,
                 fontWeight: FontWeight.bold,
               ),
             ),
             const SizedBox(height: 20.0),
-            ...v.questions[_currentQuestionIndex].answers.map(
+            ..._currentQuestion.answers.map(
               (option) {
                 return Container(
                     margin: const EdgeInsets.symmetric(vertical: 8.0),
                     child: FilledButton(
-                        onPressed: () => ask_state == -1
+                        onPressed: () => askState == -1
                             ? _checkAnswer(
-                                v.questions[_currentQuestionIndex].answers
-                                    .indexOf(option),
+                                _currentQuestion.answers.indexOf(option),
                               )
                             : _nextQuestion(),
                         style: FilledButton.styleFrom(
                           padding: const EdgeInsets.all(16.0),
-                          backgroundColor: ask_state == -1
+                          backgroundColor: askState == -1
                               ? null
-                              : (v.questions[_currentQuestionIndex].correct ==
-                                      v.questions[_currentQuestionIndex].answers
-                                          .indexOf(option)
+                              : (_currentQuestion.correct ==
+                                      _currentQuestion.answers.indexOf(option)
                                   ? Colors.green
                                   : Colors.red),
                         ),
                         child: Text(option)));
               },
             ),
-            if (ask_state != -1)
+            if (askState != -1)
               Text(
-                v.questions[_currentQuestionIndex].explanation,
+                _currentQuestion.explanation,
                 style: const TextStyle(
                   fontSize: 15.0,
                   fontWeight: FontWeight.bold,

lib/main.dart

@@ -28,21 +28,37 @@ class MainPage extends StatefulWidget {
   const MainPage({super.key});
 
   @override
-  _MainPageState createState() => _MainPageState();
+  MainPageState createState() => MainPageState();
 }
 
-class _MainPageState extends State<MainPage> {
+class MainPageState extends State<MainPage> {
   List<Vault> _vaults = [];
-  _MainPageState() {
+  MainPageState() {
     loadList();
   }
+
+  Vault? getByName(String name) {
+    for (var v in _vaults) {
+      if (v.name == name) return v;
+    }
+    return null;
+  }
+
   loadList() async {
     final prefs = await SharedPreferences.getInstance();
     List<String>? json = prefs.getStringList("vaults");
+    List<String>? jsonState = prefs.getStringList("vaultStates");
     if (json == null) return;
     setState(() {
       _vaults = json.map((e) => Vault.fromJson(jsonDecode(e))).toList();
     });
+    if (jsonState == null) return;
+    for (var s in jsonState) {
+      var sMap = jsonDecode(s);
+      Vault? v = getByName(sMap["name"]);
+      if (v == null) continue;
+      v.loadState(sMap);
+    }
   }
 
   saveList() async {
@@ -51,21 +67,46 @@ class _MainPageState extends State<MainPage> {
         "vaults", _vaults.map((e) => jsonEncode(e.toJson())).toList());
   }
 
-  askToDeleteVault(Vault v) async {
+  saveStateList() async {
+    final prefs = await SharedPreferences.getInstance();
+    prefs.setStringList("vaultStates",
+        _vaults.map((e) => jsonEncode(e.toStateJson())).toList());
+  }
+
+  _vaultMenu(Vault v) async {
+    showModalBottomSheet(
+        context: context,
+        builder: (context) => BottomSheet(
+              builder: (context) => Column(children: [
+                Padding(
+                    padding: const EdgeInsets.all(8),
+                    child: Text(v.name,
+                        style: const TextStyle(
+                          fontSize: 20.0,
+                          fontWeight: FontWeight.bold,
+                        ))),
+                ListTile(
+                  leading: const Icon(Icons.restore),
+                  title: const Text("Reset Vault"),
+                  subtitle: const Text("Reset Vault learn Data to default."),
+                  trailing: const Icon(Icons.chevron_right),
+                  onTap: () {
                     showDialog(
                       context: context,
                       builder: (BuildContext context) {
                         return AlertDialog(
-          title: const Text('Delete Vault'),
-          content: Text('Do you want to delete „${v.name}“ Vault?'),
+                          title: const Text('Reset Vault'),
+                          content:
+                              Text('Do you want to reset „${v.name}“ Vault?'),
                           actions: [
                             TextButton(
-              child: const Text('Delete'),
+                              child: const Text('Reset'),
                               onPressed: () {
                                 setState(() {
-                  _vaults.remove(v);
+                                  v.reset();
                                 });
-                saveList();
+                                saveStateList();
+                                Navigator.of(context).pop();
                                 Navigator.of(context).pop();
                               },
                             ),
@@ -78,6 +119,47 @@ class _MainPageState extends State<MainPage> {
                         );
                       },
                     );
+                  },
+                ),
+                ListTile(
+                    leading: const Icon(Icons.delete),
+                    title: const Text("Vault löschen"),
+                    subtitle: Text('Do you want to delete „${v.name}“ Vault?'),
+                    trailing: const Icon(Icons.chevron_right),
+                    onTap: () async {
+                      showDialog(
+                        context: context,
+                        builder: (BuildContext context) {
+                          return AlertDialog(
+                            title: const Text('Delete Vault'),
+                            content: Text(
+                                'Do you want to delete „${v.name}“ Vault?'),
+                            actions: [
+                              TextButton(
+                                child: const Text('Delete'),
+                                onPressed: () {
+                                  setState(() {
+                                    _vaults.remove(v);
+                                  });
+                                  saveList();
+                                  saveStateList();
+                                  Navigator.of(context).pop();
+                                  Navigator.of(context).pop();
+                                },
+                              ),
+                              TextButton(
+                                  onPressed: () {
+                                    Navigator.of(context).pop();
+                                  },
+                                  child: const Text('Cancle'))
+                            ],
+                          );
+                        },
+                      );
+                    })
+              ]),
+              onClosing: () {},
+            ));
   }
 
   _pickFile() async {
@@ -95,9 +177,8 @@ class _MainPageState extends State<MainPage> {
         });
         saveList();
       } catch (e) {
-        if (kDebugMode) {
         print(e);
-        }
+
         AlertDialog(
             title: const Text('Error'),
             content: const Text('An error has occurred.'),
@@ -114,6 +195,8 @@ class _MainPageState extends State<MainPage> {
     }
   }
 
+  
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -130,11 +213,11 @@ class _MainPageState extends State<MainPage> {
                 onPressed: () {
                   Navigator.push(
                     context,
-                    MaterialPageRoute(builder: (context) => QuizPage(e)),
+                    MaterialPageRoute(builder: (context) => QuizPage(e, saveStateList)),
                   );
                 },
                 onLongPress: () {
-                  askToDeleteVault(e);
+                  _vaultMenu(e);
                 },
                 child: Text(e.name),
               )))
@@ -153,6 +236,8 @@ class Question {
   List<String> answers;
   int correct;
   String explanation;
+  int drawer = 0;
+  int lastInRun = 0;
 
   Question(this.quest, this.answers, this.correct, this.explanation);
 
@@ -201,8 +286,21 @@ class Vault {
     };
   }
 
-  void randomize() {
-    questions.shuffle(Random());
+  Map<String, dynamic> toStateJson() {
+    return {"name": name, "drawers": questions.map((d) => d.drawer).toList()};
+  }
+
+  void reset() {
+    for (var q in questions) {
+      q.drawer = 0;
+      q.lastInRun = 0;
+    }
+  }
+
+  void softReset() {
+    for (var q in questions) {
+      q.lastInRun = 0;
+    }
   }
 
   factory Vault.fromJson(Map<String, dynamic> json) {
@@ -219,4 +317,17 @@ class Vault {
           .toList(),
     );
   }
+  loadState(Map<String, dynamic> json) {
+    if (json["name"] != name) throw ErrorDescription("Wrong Vault Error");
+    if (json["drawers"] is! List<dynamic>) {
+      throw ErrorDescription("fromJSON Error: questions");
+    }
+    var stateList = json["drawers"];
+    for (var i = 0; i < stateList.length; i++) {
+      var q = questions.elementAtOrNull(i);
+      if (q != null) {
+        q.drawer = stateList[i] as int;
+      }
+    }
+  }
 }