Save answers

core/lib/src/domain/entities/question_answer.dart

@@ -6,7 +6,6 @@ class QuestionAnswer<T> extends Equatable {
   final T answer;
 
   @override
-  // TODO(dev): implement props.
   List<Object?> get props => [answer];
 
   const QuestionAnswer(this.answer);

core/lib/src/presentation/choice_question/choice_question_page.dart

@@ -20,6 +20,9 @@ class ChoiceQuestionPage extends StatefulWidget {
   /// This field contains the content for a page, including options.
   final ChoiceQuestionData data;
 
+  // Contains the options indices that the user selected.
+  final QuestionAnswer<List<int>>? answer;
+
   /// Callback that is called when [ChoiceQuestionData.isSkip] is true or at
   /// least one option has been selected.
   final OnSendCallback onSend;
@@ -30,6 +33,7 @@ class ChoiceQuestionPage extends StatefulWidget {
   const ChoiceQuestionPage({
     required this.data,
     required this.onSend,
+    this.answer,
     this.onSecondaryButtonTap,
     super.key,
   });
@@ -44,29 +48,30 @@ class _ChoiceQuestionPageState extends State<ChoiceQuestionPage>
   bool _canBeSend = false;
 
   /// Stores the indices of the selected options.
-  List<int> _selectedItems = List.empty();
+  List<int> _answer = List.empty();
 
   @override
   void initState() {
-    final selectedOptions = widget.data.selectedOptions;
+    final selectedOptions =
+        widget.answer?.answer ?? widget.data.selectedOptions;
     super.initState();
     if (selectedOptions != null) {
-      _selectedItems = selectedOptions;
+      _answer = selectedOptions;
       _canBeSend = true;
     }
   }
 
   void _onInputChanged(List<int>? selectedItems) {
     setState(() {
-      _selectedItems = selectedItems ?? List.empty();
+      _answer = selectedItems ?? List.empty();
     });
 
     if (!widget.data.isSkip) {
       final canBeSend = widget.data.ruleType.canBeSend(
             widget.data.ruleValue,
-            _selectedItems.length,
+            _answer.length,
           ) &&
-          _selectedItems.isNotEmpty;
+          _answer.isNotEmpty;
       setState(() => _canBeSend = canBeSend);
     }
   }
@@ -120,12 +125,11 @@ class _ChoiceQuestionPageState extends State<ChoiceQuestionPage>
                             onChanged: _onInputChanged,
                             activeColor: theme.activeColor,
                             inactiveColor: theme.inactiveColor,
-                            selectedOptions: List.of(_selectedItems),
+                            selectedOptions: List.of(_answer),
                           )
                         : _QuestionRadioButtons(
-                            selectedOption: _selectedItems.isEmpty
-                                ? null
-                                : _selectedItems.first,
+                            selectedOption:
+                                _answer.isEmpty ? null : _answer.first,
                             options: options,
                             onChanged: (selectedItem) => _onInputChanged(
                               selectedItem == null ? null : [selectedItem],
@@ -159,9 +163,7 @@ class _ChoiceQuestionPageState extends State<ChoiceQuestionPage>
                             onPressed: () {
                               widget.onSend.call(
                                 index: widget.data.index,
-                                answer: QuestionAnswer<List<int>>(
-                                  _selectedItems,
-                                ),
+                                answer: QuestionAnswer<List<int>>(_answer),
                               );
                             },
                             isEnabled: widget.data.isSkip || _canBeSend,

core/lib/src/presentation/input_question/input_question_page.dart

@@ -24,6 +24,9 @@ class InputQuestionPage extends StatefulWidget {
   /// Contains the content for a page.
   final InputQuestionData data;
 
+  // Contains string that the user enter.
+  final QuestionAnswer? answer;
+
   /// Callback that is called after pressing bottom button if input data is
   /// valid or when the question can be skipped.
   final OnSendCallback onSend;
@@ -34,6 +37,7 @@ class InputQuestionPage extends StatefulWidget {
   const InputQuestionPage({
     required this.data,
     required this.onSend,
+    this.answer,
     this.onSecondaryButtonTap,
     super.key,
   });
@@ -53,6 +57,19 @@ class _InputQuestionPageState extends State<InputQuestionPage> {
 
   bool get isDateType => widget.data.validator.type == InputType.date;
 
+  @override
+  void initState() {
+    super.initState();
+
+    final questionAnswer = widget.answer;
+
+    if (questionAnswer is QuestionAnswer<String>) {
+      _input = questionAnswer.answer;
+    } else if (questionAnswer is QuestionAnswer<DateTime>) {
+      _dateTime = questionAnswer.answer;
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final theme =
@@ -116,6 +133,7 @@ class _InputQuestionPageState extends State<InputQuestionPage> {
                         ? _InputDate(
                             border: border,
                             dateTime: _dateTime,
+                            hasInitialValue: widget.answer != null,
                             hintText: hintText ?? '',
                             onChanged: (value) {
                               if (value != null) {
@@ -135,6 +153,7 @@ class _InputQuestionPageState extends State<InputQuestionPage> {
                             onChanged: (input) =>
                                 setState(() => _input = input),
                             theme: theme,
+                            initialValue: _input,
                             validator: (text) => _canBeSkippedNumber
                                 ? null
                                 : widget.data.validator.validate(text),
@@ -206,6 +225,9 @@ class _InputDate extends StatelessWidget {
   /// The selected date value.
   final DateTime dateTime;
 
+  /// Whether this Input Data has initial date.
+  final bool hasInitialValue;
+
   /// The hint text displayed in the input field.
   final String hintText;
 
@@ -221,6 +243,7 @@ class _InputDate extends StatelessWidget {
   const _InputDate({
     required this.border,
     required this.dateTime,
+    required this.hasInitialValue,
     required this.hintText,
     required this.onChanged,
     required this.theme,
@@ -246,6 +269,7 @@ class _InputDate extends StatelessWidget {
         border: border,
       ),
       format: DateFormat('dd.MM.yyyy'),
+      initialValue: hasInitialValue ? dateTime : null,
       autovalidateMode: AutovalidateMode.onUserInteraction,
       validator: validator,
       onChanged: onChanged,
@@ -266,7 +290,7 @@ class _InputDate extends StatelessWidget {
 }
 
 /// Widget that represents an input field for entering a numeric value.
-class _InputNumber extends StatelessWidget {
+class _InputNumber extends StatefulWidget {
   /// The border for the input field.
   final OutlineInputBorder border;
 
@@ -282,41 +306,64 @@ class _InputNumber extends StatelessWidget {
   /// The validator function that validates the input value.
   final String? Function(String?) validator;
 
+  final String? initialValue;
+
   const _InputNumber({
     required this.border,
     required this.hintText,
     required this.onChanged,
     required this.theme,
     required this.validator,
+    required this.initialValue,
   });
 
+  @override
+  State<_InputNumber> createState() => _InputNumberState();
+}
+
+class _InputNumberState extends State<_InputNumber> {
+  late TextEditingController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = TextEditingController(text: widget.initialValue);
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return DecoratedBox(
       decoration: BoxDecoration(
         borderRadius: const BorderRadius.all(Radius.circular(_radius)),
-        color: theme.inputFill,
+        color: widget.theme.inputFill,
       ),
       child: Form(
         child: TextFormField(
-          maxLines: theme.lines,
+          controller: _controller,
+          maxLines: widget.theme.lines,
           style: TextStyle(
-            color: theme.textColor,
-            fontSize: theme.textSize,
+            color: widget.theme.textColor,
+            fontSize: widget.theme.textSize,
           ),
           autovalidateMode: AutovalidateMode.onUserInteraction,
-          validator: validator,
-          onChanged: onChanged,
+          validator: widget.validator,
+          onChanged: widget.onChanged,
           decoration: InputDecoration(
-            fillColor: theme.inputFill,
-            hintText: hintText,
+            fillColor: widget.theme.inputFill,
+            hintText: widget.hintText,
             hintStyle: TextStyle(
-              color: theme.hintColor,
-              fontSize: theme.hintSize,
+              color: widget.theme.hintColor,
+              fontSize: widget.theme.hintSize,
             ),
-            enabledBorder: border,
-            focusedBorder: border,
-            border: border,
+            enabledBorder: widget.border,
+            focusedBorder: widget.border,
+            border: widget.border,
           ),
         ),
       ),

core/lib/src/presentation/slider_question/slider_question_page.dart

@@ -14,6 +14,9 @@ class SliderQuestionPage extends StatefulWidget {
   /// slider, the initial value of the slider, and other properties.
   final SliderQuestionData data;
 
+  /// Contains the number that the user selected.
+  final QuestionAnswer<double>? answer;
+
   /// Callback that is called after pressing bottom button.
   final OnSendCallback onSend;
 
@@ -23,6 +26,7 @@ class SliderQuestionPage extends StatefulWidget {
   const SliderQuestionPage({
     required this.data,
     required this.onSend,
+    this.answer,
     this.onSecondaryButtonTap,
     super.key,
   });
@@ -37,7 +41,7 @@ class _SliderQuestionPageState extends State<SliderQuestionPage> {
   @override
   void initState() {
     super.initState();
-    _answer = widget.data.initialValue.toDouble();
+    _answer = widget.answer?.answer ?? widget.data.initialValue.toDouble();
   }
 
   @override
@@ -82,7 +86,7 @@ class _SliderQuestionPageState extends State<SliderQuestionPage> {
                     child: _QuestionSlider(
                       minValue: widget.data.minValue,
                       maxValue: widget.data.maxValue,
-                      initialValue: widget.data.initialValue,
+                      initialValue: _answer,
                       onChanged: (value) => setState(() => _answer = value),
                       theme: theme,
                       divisions: widget.data.divisions,
@@ -140,7 +144,7 @@ class _QuestionSlider extends StatefulWidget {
   final int maxValue;
 
   /// Initial value of the slider.
-  final int initialValue;
+  final double initialValue;
 
   /// Number of divisions for the slider.
   final int divisions;
@@ -173,7 +177,7 @@ class _QuestionSliderState extends State<_QuestionSlider> {
 
   @override
   void initState() {
-    _value = widget.initialValue.toDouble();
+    _value = widget.initialValue;
     _onlyInt = widget.initialValue.ceilToDouble() ==
         widget.initialValue.floorToDouble();
     super.initState();
@@ -187,7 +191,7 @@ class _QuestionSliderState extends State<_QuestionSlider> {
     _value = _value >= widget.minValue.toDouble() &&
             _value <= widget.maxValue.toDouble()
         ? _value
-        : widget.initialValue.toDouble();
+        : widget.initialValue;
     return SliderTheme(
       data: SliderThemeData(
         activeTrackColor: widget.theme.activeColor,

core/lib/src/presentation/survey/survey.dart

@@ -131,6 +131,7 @@ class _SurveyState extends State<Survey> {
                     .map<Widget>(
                       (question) => DataToWidgetUtil.createWidget(
                         data: question,
+                        answer: state.answers[question.index],
                         onSend: _cubit.saveAnswer,
                         onGoNext: _surveyController.onNext,
                       ),

core/lib/src/presentation/utils/data_to_widget_util.dart

@@ -20,6 +20,7 @@ abstract class DataToWidgetUtil {
     required QuestionData data,
     required OnSendCallback onSend,
     required VoidCallback onGoNext,
+    QuestionAnswer? answer,
   }) {
     void sendAndGoNext({required int index, required QuestionAnswer answer}) {
       onSend(index: index, answer: answer);
@@ -30,16 +31,19 @@ abstract class DataToWidgetUtil {
       case SliderQuestionData:
         return SliderQuestionPage(
           data: data as SliderQuestionData,
+          answer: answer as QuestionAnswer<double>?,
           onSend: sendAndGoNext,
         );
       case ChoiceQuestionData:
         return ChoiceQuestionPage(
           data: data as ChoiceQuestionData,
+          answer: answer as QuestionAnswer<List<int>>?,
           onSend: sendAndGoNext,
         );
       case InputQuestionData:
         return InputQuestionPage(
           data: data as InputQuestionData,
+          answer: answer,
           onSend: sendAndGoNext,
         );
       case IntroQuestionData: