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Merge pull request #3 from sharkyze/fetch-data-from-github
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Fetch data remotely
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@xsaamiir
xsaamiir committed Aug 25, 2020
2 parents 0e8a33e + f15615f commit b3c027c
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Showing 5 changed files with 185 additions and 112 deletions.
3 changes: 3 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -42,3 +42,6 @@ app.*.map.json

# Exceptions to above rules.
!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

# VS Code
.vscode
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281 changes: 175 additions & 106 deletions lib/main.dart
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Original file line number Diff line number Diff line change
@@ -1,34 +1,68 @@
import 'dart:async';
import 'dart:io';

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:flutter_map/flutter_map.dart';
import 'package:geojson/geojson.dart';
import 'package:geolocator/geolocator.dart';
import 'package:geopoint/geopoint.dart';
import 'package:http/http.dart' as http;
import 'package:latlong/latlong.dart';
import 'package:package_info/package_info.dart';
import 'package:paris_masque/geofencing.dart';
import 'package:path_provider/path_provider.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:user_location/user_location.dart';

const privacy =
"L'application ne collecte ni sauvegarde aucune de vos données. Votre position ne quitte jamais votre portable, tous les traitements sont fait sur votre appareil.";
const mapboxAccessToken =
"pk.eyJ1Ijoic2hhcmt5emUiLCJhIjoiY2tlNDl3ZzhjMDJwczMycWdnMGhwdmRvYyJ9.wkVys6dgiAyPJ9nxFg5syQ";
const geoJSONDataUrl =
"https://raw.githubusercontent.com/sharkyze/paris_masque/master/assets/data/coronavirus-port-du-masque-obligatoire-lieux-places-et-marches.geojson";

void main() {
runApp(App());
}

class App extends StatelessWidget {
static Future<Geofencing> _loadGeoJSON() async {
final data = await rootBundle.loadString(
'assets/data/coronavirus-port-du-masque-obligatoire-lieux-places-et-marches.geojson');
Future<Geofencing> _loadGeoJSON() async {
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
File cacheFile = File("$tempPath/data.geojson");

String data;
if (await cacheFile.exists()) {
debugPrint("loading data from cache file");
data = await _loadGeoJSONLocally(cacheFile);
} else {
debugPrint("loading data from network");
data = await _loadGeoJSONRemotely();
cacheFile.writeAsString(data);
}

return Geofencing.fromString(data);
}

static Future<String> _loadGeoJSONRemotely() async {
final res = await http.get(geoJSONDataUrl);

if (res.statusCode == 200) {
// If the server did return a 200 OK response,
// then parse the JSON.
return res.body;
} else {
// If the server did not return a 200 OK response,
// then throw an exception.
throw Exception('Failed to load geojson data from remote source');
}
}

static Future<String> _loadGeoJSONLocally(File file) async {
return file.readAsString();
}

@override
Widget build(BuildContext context) {
return MaterialApp(
Expand All @@ -48,44 +82,75 @@ class App extends StatelessWidget {
home: FutureBuilder(
future: _loadGeoJSON(),
builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot) {
Widget widget;

if (snapshot.hasData) {
widget = HomePage(geofencing: snapshot.data);
return HomePage(geofencing: snapshot.data);
} else if (snapshot.hasError) {
widget = Text(
"Oups, une erreur est survenue, veuillez réessayer ultérieurement 🤦‍♀️🤦‍♀️",
style: TextStyle(fontSize: 20));
return ErrorPage();
} else {
widget = Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
SizedBox(
child: CircularProgressIndicator(),
width: 50,
height: 50,
),
const Padding(
padding: EdgeInsets.only(top: 16),
child: Text(
'Données en cours de téléchargement 📡',
style: TextStyle(fontSize: 20),
),
)
],
),
);
return SplashPage();
}

return widget;
},
),
);
}
}

class CenteredColumn extends StatelessWidget {
final List<Widget> children;

const CenteredColumn({Key key, @required this.children}) : super(key: key);

@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: this.children,
),
);
}
}

class SplashPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Layout(
body: CenteredColumn(
children: [
SizedBox(
child: Image.asset("assets/images/paris-masque-square.png"),
height: MediaQuery.of(context).size.height * 0.3,
),
SizedBox(height: 20),
SizedBox(
child: CircularProgressIndicator(),
width: 40,
height: 40,
),
],
),
);
}
}

class ErrorPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Layout(
body: CenteredColumn(
children: [
Text(
"Oups, une erreur est survenue 😢. Veuillez réessayer ultérieurement...",
style: TextStyle(fontSize: 20),
textAlign: TextAlign.center,
)
],
),
);
}
}

class Layout extends StatelessWidget {
final Widget body;
final List<Widget> appBarActions;
Expand Down Expand Up @@ -204,67 +269,64 @@ class _HomePageState extends State<HomePage> {
),
],
body: Container(
child: Center(
child: RefreshIndicator(
onRefresh: _checkShouldWearMask,
child: Stack(
fit: StackFit.expand,
children: [
ListView(),
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
if (this._status == _HomePageStatus.loading)
Text(
"Vérification en cours... ⌛",
style: TextStyle(fontSize: 20),
),
if (this._status == _HomePageStatus.success)
ShouldWearMask(this._matchedMaskLocations),
SizedBox(height: 16),
if (this._status != _HomePageStatus.loading)
Text("Glisser l'écran vers le bas pour actualiser"),
if (this._status == _HomePageStatus.error_geolocation)
Column(
children: [
Text(
"💥",
style: TextStyle(fontSize: 50),
child: RefreshIndicator(
onRefresh: _checkShouldWearMask,
child: Stack(
fit: StackFit.expand,
children: [
ListView(),
CenteredColumn(
children: <Widget>[
if (this._status == _HomePageStatus.loading)
Text(
"Vérification en cours... ⌛",
style: TextStyle(fontSize: 20),
),
if (this._status == _HomePageStatus.success)
ShouldWearMask(this._matchedMaskLocations),
SizedBox(height: 16),
if (this._status != _HomePageStatus.loading)
Text("Glisser l'écran vers le bas pour actualiser"),
if (this._status == _HomePageStatus.error_geolocation)
Column(
children: [
Text(
"💥",
style: TextStyle(fontSize: 50),
textAlign: TextAlign.center,
),
SizedBox(height: 10),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: Text(
"L'application a besoin de votre position pour fonctionner",
style: TextStyle(fontSize: 20),
softWrap: true,
textAlign: TextAlign.center,
),
SizedBox(height: 10),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: Text(
"L'application a besoin de votre position pour fonctionner",
style: TextStyle(fontSize: 20),
softWrap: true,
textAlign: TextAlign.center,
),
),
SizedBox(height: 16),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: RichText(
textAlign: TextAlign.center,
text: TextSpan(children: [
TextSpan(
text: "Assurez-vous\n",
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 16),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: RichText(
textAlign: TextAlign.center,
text: TextSpan(children: [
TextSpan(
text: "Assurez-vous\n",
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
TextSpan(text: privacy + "\n\n")
]),
),
)
],
),
],
),
],
),
),
TextSpan(text: privacy + "\n\n")
]),
),
)
],
),
],
),
],
),
),
),
Expand All @@ -285,21 +347,23 @@ class ShouldWearMask extends StatelessWidget {
? _matchedMaskLocations.first.properties["nom_long"]
: "";

return Column(children: [
Text(shouldWearMask ? "Oui 😷" : "Non 🎉", style: style),
SizedBox(height: 16),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: Text(
shouldWearMask
? "Le masque est obligatoire dans le secteur\n« $maskZoneName »"
: "Profitez bien, mais faîtes quand même attention 🙏",
style: TextStyle(fontSize: 18),
softWrap: true,
textAlign: TextAlign.center,
),
)
]);
return Column(
children: [
Text(shouldWearMask ? "Oui 😷" : "Non 🎉", style: style),
SizedBox(height: 16),
Padding(
padding: const EdgeInsets.only(right: 8, left: 8),
child: Text(
shouldWearMask
? "Le masque est obligatoire dans le secteur\n« $maskZoneName »"
: "Profitez bien, mais faîtes attention quand même 🙏",
style: TextStyle(fontSize: 18),
softWrap: true,
textAlign: TextAlign.center,
),
)
],
);
}
}

Expand Down Expand Up @@ -462,9 +526,14 @@ class _MapPageState extends State<MapPage> {

@override
void initState() {
super.initState();
mapController = MapController();
}

@override
void didChangeDependencies() {
super.didChangeDependencies();
loadData();
super.initState();
}

@override
Expand Down
6 changes: 3 additions & 3 deletions pubspec.lock
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Original file line number Diff line number Diff line change
Expand Up @@ -262,7 +262,7 @@ packages:
source: hosted
version: "0.14.0+3"
http:
dependency: transitive
dependency: "direct main"
description:
name: http
url: "https://pub.dartlang.org"
Expand Down Expand Up @@ -437,12 +437,12 @@ packages:
source: hosted
version: "1.7.0"
path_provider:
dependency: transitive
dependency: "direct main"
description:
name: path_provider
url: "https://pub.dartlang.org"
source: hosted
version: "1.6.11"
version: "1.6.14"
path_provider_linux:
dependency: transitive
description:
Expand Down

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