Added firebase database integration

android/app/build.gradle

@@ -12,6 +12,8 @@ if (flutterRoot == null) {
 }
 
 apply plugin: 'com.android.application'
+apply plugin: 'com.google.gms.google-services'
+
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
@@ -26,7 +28,7 @@ android {
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId "com.yourcompany.weight_tracker"
+        applicationId "com.mszalek.weight_tracker"
     }
 
     buildTypes {

android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.yourcompany.weight_tracker"
+          package="com.mszalek.weight_tracker"
           android:versionCode="1"
           android:versionName="0.0.1">
 

android/app/src/main/java/com/yourcompany/weight_tracker/MainActivity.java → android/app/src/main/java/com/mszalek/weight_tracker/MainActivity.java

@@ -1,4 +1,4 @@
-package com.yourcompany.weight_tracker;
+package com.mszalek.weight_tracker;
 
 import android.os.Bundle;
 import io.flutter.app.FlutterActivity;

android/build.gradle

@@ -5,6 +5,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.google.gms:google-services:3.1.0'
     }
 }
 

lib/home_page.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:firebase_database/firebase_database.dart';
 import 'package:flutter/material.dart';
 import 'package:weight_tracker/model/weight_entry.dart';
 import 'package:weight_tracker/weight_entry_dialog.dart';
@@ -13,11 +14,18 @@ class HomePage extends StatefulWidget {
   _HomePageState createState() => new _HomePageState();
 }
 
+final mainReference = FirebaseDatabase.instance.reference();
+
 class _HomePageState extends State<HomePage> {
   List<WeightEntry> weightSaves = new List();
   ScrollController _listViewScrollController = new ScrollController();
   double _itemExtent = 50.0;
 
+  _HomePageState() {
+    mainReference.onChildAdded.listen(_onEntryAdded);
+    mainReference.onChildChanged.listen(_onEntryEdited);
+  }
+
   @override
   Widget build(BuildContext context) {
     return new Scaffold(
@@ -35,7 +43,7 @@ class _HomePageState extends State<HomePage> {
               ? 0.0
               : weightSaves[index].weight - weightSaves[index - 1].weight;
           return new InkWell(
-              onTap: () => _editEntry(weightSaves[index]),
+              onTap: () => _openEditEntryDialog(weightSaves[index]),
               child: new WeightListItem(weightSaves[index], difference));
         },
       ),
@@ -47,45 +55,60 @@ class _HomePageState extends State<HomePage> {
     );
   }
 
-  void _addWeightSave(WeightEntry weightSave) {
-    setState(() {
-      weightSaves.add(weightSave);
-      _listViewScrollController.animateTo(
-        weightSaves.length * _itemExtent,
-        duration: const Duration(microseconds: 1),
-        curve: new ElasticInCurve(0.01),
-      );
-    });
-  }
-
-  _editEntry(WeightEntry weightSave) {
+  _openEditEntryDialog(WeightEntry weightEntry) {
     Navigator
         .of(context)
         .push(
       new MaterialPageRoute<WeightEntry>(
         builder: (BuildContext context) {
-          return new WeightEntryDialog.edit(weightSave);
+          return new WeightEntryDialog.edit(weightEntry);
         },
         fullscreenDialog: true,
       ),
     )
-        .then((newSave) {
-      if (newSave != null) {
-        setState(() => weightSaves[weightSaves.indexOf(weightSave)] = newSave);
+        .then((WeightEntry newEntry) {
+      if (newEntry != null) {
+        mainReference.child(weightEntry.key).set(newEntry.toJson());
       }
     });
   }
 
   Future _openAddEntryDialog() async {
-    WeightEntry save =
+    WeightEntry entry =
     await Navigator.of(context).push(new MaterialPageRoute<WeightEntry>(
         builder: (BuildContext context) {
           return new WeightEntryDialog.add(
               weightSaves.isNotEmpty ? weightSaves.last.weight : 60.0);
         },
         fullscreenDialog: true));
-    if (save != null) {
-      _addWeightSave(save);
+    if (entry != null) {
+      mainReference.push().set(entry.toJson());
     }
   }
+
+  _onEntryAdded(Event event) {
+    setState(() {
+      weightSaves.add(new WeightEntry.fromSnapshot(event.snapshot));
+      weightSaves.sort((we1, we2) => we1.dateTime.compareTo(we2.dateTime));
+    });
+    _scrollToTop();
+  }
+
+  _onEntryEdited(Event event) {
+    var oldValue =
+    weightSaves.singleWhere((entry) => entry.key == event.snapshot.key);
+    setState(() {
+      weightSaves[weightSaves.indexOf(oldValue)] =
+      new WeightEntry.fromSnapshot(event.snapshot);
+      weightSaves.sort((we1, we2) => we1.dateTime.compareTo(we2.dateTime));
+    });
+  }
+
+  _scrollToTop() {
+    _listViewScrollController.animateTo(
+      weightSaves.length * _itemExtent,
+      duration: const Duration(microseconds: 1),
+      curve: new ElasticInCurve(0.01),
+    );
+  }
 }

lib/main.dart

@@ -1,13 +1,13 @@
+import 'package:firebase_database/firebase_database.dart';
 import 'package:flutter/material.dart';
 import 'package:weight_tracker/home_page.dart';
 
-
 void main() {
+  FirebaseDatabase.instance.setPersistenceEnabled(true);
   runApp(new MyApp());
 }
 
 class MyApp extends StatelessWidget {
-
   @override
   Widget build(BuildContext context) {
     return new MaterialApp(
@@ -18,4 +18,4 @@ class MyApp extends StatelessWidget {
       home: new HomePage(title: 'Weight Tracker'),
     );
   }
-}
+}

lib/model/weight_entry.dart

@@ -1,7 +1,25 @@
+import 'package:firebase_database/firebase_database.dart';
+
 class WeightEntry {
+  String key;
   DateTime dateTime;
   double weight;
   String note;
 
   WeightEntry(this.dateTime, this.weight, this.note);
-}
+
+  WeightEntry.fromSnapshot(DataSnapshot snapshot)
+      : key = snapshot.key,
+        dateTime =
+        new DateTime.fromMillisecondsSinceEpoch(snapshot.value["date"]),
+        weight = snapshot.value["weight"].toDouble(),
+        note = snapshot.value["note"];
+
+  toJson() {
+    return {
+      "weight": weight,
+      "date": dateTime.millisecondsSinceEpoch,
+      "note": note
+    };
+  }
+}

pubspec.yaml

@@ -5,23 +5,16 @@ dependencies:
   flutter:
     sdk: flutter
   numberpicker: "^0.1.0"
+#  google_sign_in: 0.3.1
+#  firebase_analytics: 0.0.4
+#  firebase_auth: 0.2.0
+  firebase_database: 0.0.12
 
-# For information on the generic Dart part of this file, see the
-# following page: https://www.dartlang.org/tools/pub/pubspec
-
-# The following section is specific to Flutter.
 flutter:
 
-  # The following line ensures that the Material Icons font is
-  # included with your application, so that you can use the icons in
-  # the Icons class.
   uses-material-design: true
-
-  # To add assets to your application, add an assets section here, in
-  # this "flutter" section, as in:
   assets:
     - assets/scale-bathroom.png
-  #  - images/a_dot_ham.jpeg
 
   # To add assets from package dependencies, first ensure the asset
   # is in the lib/ directory of the dependency. Then,