Teso_Mobile/lib/Pages/splash.dart

import 'dart:async';
import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:page_transition/page_transition.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:teso/Services/DynamicLinks.dart';
import 'package:teso/Services/locator.dart';
import 'package:teso/main_screen.dart';
import 'package:teso/util/SizeConfig.dart';
import 'package:teso/util/consts.dart';
import 'LandingPage.dart';
import 'package:http/http.dart' as http;

class Splash extends StatefulWidget {
  @override
  _SplashState createState() => _SplashState();
}

class _SplashState extends State<Splash> with TickerProviderStateMixin {
  List<CameraDescription> connectedCameras;
  Animation<double> _animation;
  AnimationController _controller;
  final DynamicLinkService _dynamicLinkService = locator<DynamicLinkService>();

  gotoPersonnalServer() {
    _controller = AnimationController(
        duration: const Duration(milliseconds: 2000), vsync: this, value: 0.1);
    _animation =
        CurvedAnimation(parent: _controller, curve: Curves.bounceInOut);

    _controller.forward();
  }

  var timeout = const Duration(seconds: 2);
  var ms = const Duration(milliseconds: 1);

  bool gone = false;

  startTimeout() {
    // return new Timer(Duration(seconds: 5), loggedIn);
    loggedIn();
  }

  void handleTimeout() {
    changeScreen();
  }

  changeScreen() async {
    Navigator.pushReplacement(
      context,
      PageTransition(
        type: PageTransitionType.rightToLeft,
        child: LandingPage(
          connectedCameras: connectedCameras,
        ),
      ),
    );
    //Provider.of<HomeProvider>(context, listen: false).getFeeds();
  }

  void loggedIn() async {
    await _dynamicLinkService.handleDynamicLinks();
    SharedPreferences prefs = await SharedPreferences.getInstance();
    String tokens = prefs.getString("tokensTeso");
    if (tokens != null) {
      Navigator.pushReplacement(
        context,
        PageTransition(
          type: PageTransitionType.rightToLeft,
          child: MainScreens(
            connectedCameras: connectedCameras,
          ),
        ),
      );
    } else {
      changeScreen();
    }
  }

  Future<bool> apiversionCheck() async {
    try {
      SharedPreferences prefs = await SharedPreferences.getInstance();
      String token = prefs.getString('tokensTeso');
      Map<String, String> requestHeaders = {
        'Content-type': 'application/json',
        'Authorization': token
      };
      var register = serverLocation + 'api/version/current';
      var client = await http.get(Uri.parse(register)).timeout(
        const Duration(seconds: 5),
        onTimeout: () {
          return http.Response(
              'Error', 408); // Request Timeout response status code
        },
      );
      if (client.statusCode == 200) {
        String currentVersion = prefs.getString("api-version") != null
            ? prefs.getString("api-version")
            : "";
        if (currentVersion != client.body) {
          try {
            var register = Uri.parse(serverLocation + 'api/logout');
            await http.get(register, headers: requestHeaders);
          } catch (_) {}
          await prefs.clear();
          await prefs.setBool("launched", true);
          await prefs.setString("api-version", client.body);
        }
      }
      return true;
    } catch (e) {
      print(e);
      return false;
    }
  }

  @override
  void initState() {
    super.initState();
    gotoPersonnalServer();
    availableCameras().then((value) {
      connectedCameras = value;
    });
    apiversionCheck().then((t) => {startTimeout()});
  }

  @override
  Widget build(BuildContext context) {
    SizeConfig().init(context);
    return Scaffold(
      backgroundColor: Colors.white,
      body: Center(
        child: Column(
//        mainAxisSize: MainAxisSize.max,
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Container(
              alignment: Alignment.center,
              child: ScaleTransition(
                scale: _animation,
                child: Image.asset(
                  "assets/images/tesoCouponInsignia.png",
                  width: 80.0,
                ),
              ),
            ),
            SizedBox(
              height: 20,
            ),
            Text(
              "${Constants.appName}",
              style: TextStyle(
                color: tesoGold,
                fontSize: 25,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
    );
  }
}