Init

lib/splash.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'User.dart' as Users;
+import 'package:http/http.dart' as http;
+
+class SplashScreen extends StatefulWidget {
+  const SplashScreen({Key? key}) : super(key: key);
+
+  @override
+  _SplashScreenState createState() => _SplashScreenState();
+}
+
+class _SplashScreenState extends State<SplashScreen> {
+  @override
+  void initState() {
+    // TODO: implement initState
+    super.initState();
+    init();
+  }
+
+  void init() async {
+    final prefs = await SharedPreferences.getInstance();
+    // http.Response loginResponse = await Users.login('Test1', 'password');
+    // print(loginResponse.body);
+
+    if (!prefs.containsKey("password") || !prefs.containsKey("username")) {
+      Navigator.of(context).pushNamedAndRemoveUntil('/welcome', (route) => false);
+    } else {
+      try {
+        http.Response loginResponse = await Users.login(
+            prefs.getString("username") ?? '',
+            prefs.getString("password") ?? '');
+        print(loginResponse.body);
+        if (loginResponse.body.toLowerCase().contains("success")) {  //Login Success
+          Continue();
+        } else {                                                      //Login Failed
+          LoginFailed();
+        }
+      } catch (error) {                                               //Login Failed
+        LoginFailed();
+      }
+    }
+  }
+
+  void LoginFailed() async{
+    bool dbExist = await Users.cacheDbExist();
+    if (dbExist) {
+      print('cache Database exists, Lets go CACHE!');
+      Continue();
+    } else {
+      Navigator.of(context).pushReplacementNamed('/welcome');
+    }
+  }
+
+  void Continue() async{
+    await Users.initUserData();
+    Navigator.of(context).pushNamedAndRemoveUntil('/', (route) => false);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+        color: Colors.purple,
+        padding: EdgeInsets.all(80),
+        child: Column(
+            mainAxisSize: MainAxisSize.max,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Image(image: AssetImage('images/logo.png')),
+              // Text('Loading', style:TextStyle(color: Colors.grey, fontSize: 20,fontStyle: FontStyle.italic))
+            ]));
+  }
+}