Improve server form.

lib/ui/server_form.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:logger/logger.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'dart:convert';
 
 import 'dialog.dart';
@@ -8,18 +9,22 @@ import '../utils/verify_server.dart';
 final log = Logger();
 
 class ServerForm extends StatefulWidget {
-  ServerForm({Key key}) : super(key: key);
+  ServerForm({@required this.defaultNextRoute, Key key}) : super(key: key);
+  final String title = "Server data";
+  final String defaultNextRoute;
 
   @override
   _ServerFormState createState() => _ServerFormState();
 }
 
 class _ServerFormState extends State<ServerForm> {
+  static String title = "Server info";
   Uri zAddress;
   Uri botZAddress;
   bool _autoValidate = false;
   bool _disableFields = false;
   final _serverFormKey = GlobalKey<FormState>();
+  final _scaffoldKey = GlobalKey<ScaffoldState>();
 
   final zController = TextEditingController();
   final botZController = TextEditingController();
@@ -69,18 +74,30 @@ class _ServerFormState extends State<ServerForm> {
     return null;
   }
 
+  Future<String> getNextRoute() async {
+    var persistence = await SharedPreferences.getInstance();
+    String nextRoute = persistence.getString("nextRoute");
+    if (nextRoute != null) {
+      log.d("nextRoute: $nextRoute");
+      return nextRoute;
+    }
+    log.d("defaultNextRoute: ${widget.defaultNextRoute}");
+    return null;
+  }
+
   Future<void> _onPressed() async {
     log.d("Button pressed");
+    var persistence = await SharedPreferences.getInstance();
     setState(() {
       _disableFields = true;
     });
-    Scaffold.of(context).showSnackBar(this.showProgress());
+    _scaffoldKey.currentState.showSnackBar(this.showProgress());
     if (!_serverFormKey.currentState.validate()) {
       setState(() {
         _autoValidate = true;
         _disableFields = false;
       });
-      Scaffold.of(context).hideCurrentSnackBar();
+      _scaffoldKey.currentState.hideCurrentSnackBar();
       return;
     }
 
@@ -101,7 +118,7 @@ class _ServerFormState extends State<ServerForm> {
       setState(() {
         _disableFields = false;
       });
-      Scaffold.of(context).hideCurrentSnackBar();
+      _scaffoldKey.currentState.hideCurrentSnackBar();
     }
 
     if (!resp) {
@@ -111,43 +128,52 @@ class _ServerFormState extends State<ServerForm> {
               "The BotZ server does not target the provided Z server."));
     } else {
       _serverFormKey.currentState.save();
-      // TODO: go to the next window.
+      persistence.setString("zAddress", this.zAddress.toString());
+      persistence.setString("botZAddress", this.botZAddress.toString());
+      String nextRoute = await getNextRoute();
+      if (nextRoute == null) {
+        nextRoute = widget.defaultNextRoute;
+      }
+      Navigator.pushNamed(context, nextRoute);
     }
 
     log.d("Done");
   }
 
+  Form theForm() => Form(
+        key: _serverFormKey,
+        child: Column(children: <Widget>[
+          TextFormField(
+              autofocus: true,
+              autocorrect: false,
+              controller: zController,
+              enabled: !_disableFields,
+              decoration: this._textFieldDecoration("Z server", Icons.http),
+              validator: this.validateZServer,
+              autovalidate: _autoValidate,
+              onSaved: (String addr) {
+                zAddress = Uri.parse(addr);
+              }),
+          TextFormField(
+              autocorrect: false,
+              controller: botZController,
+              enabled: !_disableFields,
+              decoration: this._textFieldDecoration("BotZ server", Icons.http),
+              validator: this.validateServer,
+              autovalidate: _autoValidate,
+              onSaved: (String addr) {
+                botZAddress = Uri.parse(addr);
+              }),
+          RaisedButton(
+            onPressed: _onPressed,
+            child: Text('Save'),
+          ),
+        ]),
+      );
+
   @override
   Widget build(BuildContext context) {
-    return Form(
-      key: _serverFormKey,
-      child: Column(children: <Widget>[
-        TextFormField(
-            autofocus: true,
-            autocorrect: false,
-            controller: zController,
-            enabled: !_disableFields,
-            decoration: this._textFieldDecoration("Z server", Icons.http),
-            validator: this.validateZServer,
-            autovalidate: _autoValidate,
-            onSaved: (String addr) {
-              zAddress = Uri.parse(addr);
-            }),
-        TextFormField(
-            autocorrect: false,
-            controller: botZController,
-            enabled: !_disableFields,
-            decoration: this._textFieldDecoration("BotZ server", Icons.http),
-            validator: this.validateServer,
-            autovalidate: _autoValidate,
-            onSaved: (String addr) {
-              botZAddress = Uri.parse(addr);
-            }),
-        RaisedButton(
-          onPressed: _onPressed,
-          child: Text('Save'),
-        ),
-      ]),
-    );
+    return Scaffold(
+        key: _scaffoldKey, appBar: AppBar(title: Text(title)), body: theForm());
   }
 }