firestore_helpers 3.2.0

Firestore helper function to create dynamic and location based queries

example/lib/main.dart

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firestorehelpertest/databaseservice.dart';
import 'package:firestorehelpertest/location.dart';
import 'package:flutter/material.dart';

/// This is a little demo app to test `getDataInArea` 
/// If you want to try this you have to create your own 
/// Firebase project and add the google-service.json.

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'FireStoreHelpers Test',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'FireStoreHelpers Test'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  double newLatitude;
  double newLongitude;
  String newName;

  double currentLatitude = 35.681167;
  double currentLongitude = 139.767052;
  double currentRadius = 1000;

  final DatabaseService dbService = new DatabaseService();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Text('Current position:'),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                  child: TextField(
                    controller:
                        TextEditingController(text: currentLatitude.toString()),
                    onChanged: (s) => currentLatitude = double.parse(s),
                    decoration: InputDecoration(
                      hintText: 'lat',
                    ),
                  ),
                ),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                  child: TextField(
                    controller: TextEditingController(
                        text: currentLongitude.toString()),
                    onChanged: (s) => currentLongitude = double.parse(s),
                    decoration: InputDecoration(hintText: 'long'),
                  ),
                )
              ],
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Text('Show locations in radius:'),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                  child: TextField(
                    controller:
                        TextEditingController(text: currentRadius.toString()),
                    onChanged: (s) => currentRadius = double.parse(s),
                    decoration: InputDecoration(
                      hintText: 'radius in km',
                    ),
                  ),
                ),
                SizedBox(
                  width: 10.0,
                ),
                RaisedButton(
                  child: Text('Update'),
                  onPressed: () => setState(() {}),
                ),
              ],
            ),
            Expanded(
              child: StreamBuilder<List<Location>>(
                stream: dbService.getLocations(
                    center: GeoPoint(currentLatitude, currentLongitude),
                    radiusInKm: currentRadius),
                builder: (context, snapShot) {
                  if (!snapShot.hasData || snapShot.data.isEmpty) {
                    return Center(child: Text('No Data'));
                  } else {
                    return ListView.builder(
                        itemCount: snapShot.data.length,
                        itemBuilder: (context, index) {
                          var item = snapShot.data[index];

                          return ListTile(
                            title: Text(
                                '${item.name}   (lat:${item.position.latitude} / long:${item.position.longitude})'),
                            subtitle: Text('distance: ${item.distance}'),
                          );
                        });
                  }
                },
              ),
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Text('Add new location:'),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                    child: TextField(
                  onChanged: (s) => setState(() => newName = s),
                  decoration: InputDecoration(
                    hintText: 'name',
                  ),
                )),
                SizedBox(
                  width: 10.0,
                ),
                RaisedButton(
                  child: Text('Add'),
                  onPressed: newName != null &&
                          newLatitude != null &&
                          newLongitude != null
                      ? addLocation
                      : null,
                ),
              ],
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Text('Position:'),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                  child: TextField(
                    onChanged: (s) =>
                        setState(() => newLatitude = double.parse(s)),
                    decoration: InputDecoration(
                      hintText: 'lat',
                    ),
                  ),
                ),
                SizedBox(
                  width: 10.0,
                ),
                Expanded(
                  child: TextField(
                    onChanged: (s) =>
                        setState(() => newLongitude = double.parse(s)),
                    decoration: InputDecoration(hintText: 'long'),
                  ),
                )
              ],
            ),
          ],
        ),
      ),
    );
  }

  Future<void> addLocation() async {
    await dbService.createLocation(
        new Location(newName, GeoPoint(newLatitude, newLongitude)));
    newName = null;
    newLatitude = null;
    newLongitude = null;
    setState(() {});
  }
}