Can create surveys

lib/helpers/posts_helper.dart

@@ -158,6 +158,11 @@ class PostsHelper {
             "time-end", (post.timeEnd.millisecondsSinceEpoch / 1000).floor());
         break;
 
+      case PostKind.SURVEY:
+        request.addString("question", post.survey.question);
+        request.addString("answers", post.survey.answers.join("<>"));
+        break;
+
       default:
         throw Exception("Unsupported post type :" + post.kind.toString());
         break;

lib/models/new_post.dart

@@ -9,6 +9,17 @@ import 'package:meta/meta.dart';
 ///
 /// @author Pierre HUBERT
 
+class NewSurvey {
+  final String question;
+  final Set<String> answers;
+
+  const NewSurvey({
+    @required this.question,
+    @required this.answers,
+  })  : assert(question != null),
+        assert(answers.length > 1);
+}
+
 class NewPost {
   final PostTarget target;
   final int targetID;
@@ -18,6 +29,7 @@ class NewPost {
   final List<int> pdf;
   final PostKind kind;
   final DateTime timeEnd;
+  final NewSurvey survey;
 
   const NewPost({
     @required this.target,
@@ -28,6 +40,7 @@ class NewPost {
     @required this.image,
     @required this.pdf,
     @required this.timeEnd,
+    @required this.survey,
   })  : assert(target != null),
         assert(targetID != null),
         assert(visibility != null),
@@ -35,5 +48,6 @@ class NewPost {
         assert(kind != PostKind.TEXT || content.length > 3),
         assert(kind != PostKind.IMAGE || image != null),
         assert(kind != PostKind.PDF || pdf != null),
-        assert(kind != PostKind.COUNTDOWN || timeEnd != null);
+        assert(kind != PostKind.COUNTDOWN || timeEnd != null),
+        assert(kind != PostKind.SURVEY || survey != null);
 }

lib/ui/dialogs/new_survey_dialog.dart

@@ -0,0 +1,137 @@
+import 'package:comunic/models/new_post.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Create a new survey dialog
+///
+/// @author Pierre Hubert
+
+/// Show a dialog to prompt information about a new survey to create
+Future<NewSurvey> showNewSurveyDialog(
+    {@required BuildContext context, NewSurvey initialSurvey}) async {
+  return await showDialog<NewSurvey>(
+      context: context,
+      builder: (c) => _SurveyDialog(
+            initialSurvey: initialSurvey,
+          ));
+}
+
+class _SurveyDialog extends StatefulWidget {
+  final NewSurvey initialSurvey;
+
+  const _SurveyDialog({Key key, this.initialSurvey}) : super(key: key);
+
+  @override
+  __SurveyDialogState createState() => __SurveyDialogState();
+}
+
+class __SurveyDialogState extends State<_SurveyDialog> {
+  TextEditingController _questionController;
+  final _choiceController = TextEditingController();
+  var _choices = Set<String>();
+
+  bool get canConfirm =>
+      _questionController.text.length > 2 && _choices.length > 1;
+
+  NewSurvey get newSurvey =>
+      NewSurvey(question: _questionController.text, answers: _choices);
+
+  @override
+  void initState() {
+    super.initState();
+    _questionController = TextEditingController(
+      text: widget.initialSurvey == null ? "" : widget.initialSurvey.question,
+    );
+    if (widget.initialSurvey != null) _choices = widget.initialSurvey.answers;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: Text(tr("New survey")),
+      content: _buildBody(),
+      actions: <Widget>[
+        // Cancel
+        MaterialButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text(tr("Cancel").toUpperCase()),
+        ),
+
+        // Confirm
+        MaterialButton(
+          onPressed:
+              canConfirm ? () => Navigator.of(context).pop(newSurvey) : null,
+          child: Text(tr("Confirm").toUpperCase()),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildBody() {
+    return ConstrainedBox(
+      constraints:
+          BoxConstraints(maxHeight: MediaQuery.of(context).size.height - 50),
+      child: SingleChildScrollView(
+        child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: <Widget>[
+              // Survey question
+              TextField(
+                controller: _questionController,
+                onChanged: (s) => setState(() {}),
+                decoration: InputDecoration(
+                    alignLabelWithHint: true, labelText: tr("Question")),
+              ),
+
+              Container(height: 30),
+              Text(tr("Current choices:")),
+              _buildCurrentChoices(),
+
+              Container(
+                height: 10,
+              ),
+
+              // Add choice form
+              TextField(
+                controller: _choiceController,
+                onChanged: (s) => setState(() {}),
+                onSubmitted: (s) => _addChoice(),
+                decoration: InputDecoration(
+                    hintText: tr("New choice..."),
+                    suffixIcon: IconButton(
+                      icon: Icon(Icons.add),
+                      onPressed: () => _choiceController.text.length > 0
+                          ? _addChoice()
+                          : null,
+                    )),
+              ),
+            ]),
+      ),
+    );
+  }
+
+  Widget _buildCurrentChoices() {
+    if (_choices.length == 0) return Text(tr("No choice yet."));
+
+    return Column(
+      children: _choices
+          .map((f) => ListTile(
+              title: Text(f),
+              dense: true,
+              trailing: IconButton(
+                icon: Icon(Icons.delete),
+                iconSize: 15,
+                onPressed: () => setState(() => _choices.remove(f)),
+              )))
+          .toList(),
+    );
+  }
+
+  void _addChoice() {
+    if (_choiceController.text.length == 0) return;
+    setState(() {
+      _choices.add(_choiceController.text);
+      _choiceController.text = "";
+    });
+  }
+}

lib/ui/widgets/post_create_form_widget.dart

@@ -5,6 +5,7 @@ import 'package:comunic/enums/post_target.dart';
 import 'package:comunic/enums/post_visibility_level.dart';
 import 'package:comunic/helpers/posts_helper.dart';
 import 'package:comunic/models/new_post.dart';
+import 'package:comunic/ui/dialogs/new_survey_dialog.dart';
 import 'package:comunic/utils/files_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/post_utils.dart';
@@ -50,6 +51,7 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
   File _postImage;
   List<int> _postPDF;
   DateTime _timeEnd;
+  NewSurvey _postSurvey;
 
   bool get hasImage => _postImage != null;
 
@@ -57,6 +59,8 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
 
   bool get hasTimeEnd => _timeEnd != null;
 
+  bool get hasSurvey => _postSurvey != null;
+
   bool get canSubmitForm =>
       !_isCreating && _postTextController.text.length > 5 ||
       postKind != PostKind.TEXT;
@@ -68,6 +72,8 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
       return PostKind.PDF;
     else if (hasTimeEnd)
       return PostKind.COUNTDOWN;
+    else if (hasSurvey)
+      return PostKind.SURVEY;
     else
       return PostKind.TEXT;
   }
@@ -132,6 +138,13 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
                         selected: postKind == PostKind.COUNTDOWN,
                         onTap: _pickCountdownTime,
                       ),
+
+                      // Add survey
+                      _PostOptionWidget(
+                        icon: Icons.insert_chart,
+                        selected: postKind == PostKind.SURVEY,
+                        onTap: _pickSurvey,
+                      ),
                     ],
                   ),
                 ),
@@ -192,6 +205,7 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
       _postImage = null;
       _postPDF = null;
       _timeEnd = null;
+      _postSurvey = null;
     });
   }
 
@@ -262,6 +276,19 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
     });
   }
 
+  /// Pick a new survey for this post
+  Future<void> _pickSurvey() async {
+    final newSurvey =
+        await showNewSurveyDialog(context: context, initialSurvey: _postSurvey);
+
+    if (newSurvey == null) return;
+
+    _resetPostSelection();
+    setState(() {
+      _postSurvey = newSurvey;
+    });
+  }
+
   /// Submit new post
   Future<void> _submitForm() async {
     if (!canSubmitForm)
@@ -279,7 +306,7 @@ class _PostCreateFormWidgetState extends State<PostCreateFormWidget> {
           image: _postImage,
           pdf: _postPDF,
           timeEnd: _timeEnd,
-      ));
+          survey: _postSurvey));
       setState(() => _isCreating = false);
 
       showSimpleSnack(context, tr("The post has been successfully created!"));