Feature/bmi calc

lib/models/patient_registration_data.dart

@@ -0,0 +1,69 @@
+/*   This file is part of Picos, a health tracking mobile app
+*    Copyright (C) 2022 Healthcare IT Solutions GmbH
+*
+*    This program is free software: you can redistribute it and/or modify
+*    it under the terms of the GNU General Public License as published by
+*    the Free Software Foundation, either version 3 of the License, or
+*    (at your option) any later version.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU General Public License for more details.
+*
+*    You should have received a copy of the GNU General Public License
+*    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import 'package:picos/models/abstract_database_object.dart';
+
+/// Class with patient information collected on registration.
+///
+/// The attributes within this model may be not complete.
+class PatientRegistrationData extends AbstractDatabaseObject {
+  /// Creates a patient registration data object.
+  const PatientRegistrationData({
+    required this.bodyHeight,
+    String? objectId,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+  }) : super(objectId: objectId, createdAt: createdAt, updatedAt: updatedAt);
+
+  /// The database table the objects are stored in.
+  static const String databaseTable = 'patientData';
+
+  /// The patients body height.
+  final int bodyHeight;
+
+  @override
+  get table {
+    return databaseTable;
+  }
+
+  /// Returns a copy of this patient registration data object
+  /// with the given values updated.
+  @override
+  PatientRegistrationData copyWith({
+    int? bodyHeight,
+    String? objectId,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+  }) {
+    return PatientRegistrationData(
+      bodyHeight: bodyHeight ?? this.bodyHeight,
+      objectId: objectId ?? this.objectId,
+      createdAt: createdAt ?? this.createdAt,
+      updatedAt: updatedAt ?? this.updatedAt,
+    );
+  }
+
+  @override
+  List<Object> get props => <Object>[
+    bodyHeight,
+  ];
+
+  @override
+  Map<String, dynamic> get databaseMapping => <String, dynamic>{
+    'BodyHeight': bodyHeight,
+  };
+}

lib/models/weekly.dart

@@ -35,10 +35,10 @@ class Weekly extends AbstractDatabaseObject {
   static const String databaseTable = 'PICOS_weekly';
 
   /// The patients body weight.
-  final int? bodyWeight;
+  final double? bodyWeight;
 
   /// The patients BMI.
-  final int? bmi;
+  final double? bmi;
 
   /// The patients sleep quality assessment.
   final int? sleepQuality;
@@ -57,8 +57,8 @@ class Weekly extends AbstractDatabaseObject {
   @override
   Weekly copyWith({
     DateTime? date,
-    int? bodyWeight,
-    int? bmi,
+    double? bodyWeight,
+    double? bmi,
     int? sleepQuality,
     int? walkingDistance,
     String? objectId,

lib/screens/questionaire_screen/pages/weight.dart

@@ -1,3 +1,22 @@
+/*   This file is part of Picos, a health tracking mobile app
+*    Copyright (C) 2022 Healthcare IT Solutions GmbH
+*
+*    This program is free software: you can redistribute it and/or modify
+*    it under the terms of the GNU General Public License as published by
+*    the Free Software Foundation, either version 3 of the License, or
+*    (at your option) any later version.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU General Public License for more details.
+*
+*    You should have received a copy of the GNU General Public License
+*    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import 'dart:math';
+
 import 'package:flutter/material.dart';
 
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
@@ -6,13 +25,13 @@ import '../widgets/questionaire_page.dart';
 import '../widgets/text_field_card.dart';
 
 /// Questionnaire Weight page.
-class Weight extends StatelessWidget {
+class Weight extends StatefulWidget {
   /// Weight constructor.
   const Weight({
     required this.previousPage,
     required this.nextPage,
     required this.onChangedBodyWeight,
-    required this.onChangedBmi,
+    this.bodyHeight = 0,
     Key? key,
   }) : super(key: key);
 
@@ -23,14 +42,25 @@ class Weight extends StatelessWidget {
   final void Function() nextPage;
 
   /// Callback for body weight.
-  final dynamic Function(String value) onChangedBodyWeight;
+  final dynamic Function(double? weight, double? bmi) onChangedBodyWeight;
+
+  /// The body height.
+  final int bodyHeight;
 
-  /// Callback for bmi.
-  final dynamic Function(String value) onChangedBmi;
+  @override
+  State<Weight> createState() => _WeightState();
+}
 
+class _WeightState extends State<Weight> {
   static String? _bodyWeight;
   static String? _autoCalc;
 
+  double _bmi = 0;
+
+  double _calculateBmi(int height, double bodyWeight) {
+    return (bodyWeight / pow(height / 100, 2));
+  }
+
   @override
   Widget build(BuildContext context) {
 
@@ -40,19 +70,35 @@ class Weight extends StatelessWidget {
     }
 
     return QuestionairePage(
-      backFunction: previousPage,
-      nextFunction: nextPage,
+      backFunction: widget.previousPage,
+      nextFunction: widget.nextPage,
       child: Column(
         children: <TextFieldCard>[
           TextFieldCard(
             label: _bodyWeight!,
             hint: 'kg',
-            onChanged: onChangedBodyWeight,
+            onChanged: (String weightString) {
+              if (weightString == '') {
+                widget.onChangedBodyWeight(null, null);
+                setState(() {
+                  _bmi = 0;
+                });
+                return;
+              }
+
+              double weight = double.parse(weightString);
+
+              setState(() {
+                _bmi = _calculateBmi(widget.bodyHeight, weight);
+              });
+
+              widget.onChangedBodyWeight(weight, _bmi);
+            },
           ),
           TextFieldCard(
             label: 'BMI',
-            hint: 'kg/m² $_autoCalc',
-            onChanged: onChangedBmi,
+            hint: _bmi == 0 ? 'kg/m² $_autoCalc' : _bmi.toString(),
+            disabled: true,
           ),
         ],
       ),