Rework to use KUKSA.val databroker gRPC API

Rework to move from the WebSocket API with the older KUKSA.val
server to the gRPC "VAL" API of the databroker.

Changes include:
- All VISS WebSocket API code has been removed, and the signal
  providers replumbed to be driven by a new VssClient class with
  a dashboard-specific child class to hold all the gRPC API
  handling.
- The generated code for the VAL API and its dependencies has
  been checked in under lib/generated, as there still does not
  seem to be a good way to generate it during the Flutter build.
- The configuration file is now expected to be "dashboard.yaml"
  instead of "dashboard.yaml".  The authorization token
  field name has been renamed to "authorization", and there are
  new "use-tls" and "ca-certificate" configuration fields.  TLS
  is disabled by default for now, and the default CA certificate
  is /etc/kuksa.val/CA.pem.
- Bumped minimum SDK version to 2.18 in pubspec.yaml to enable
  "super" keyword support.  This matches what the version was set
  to in flutter-homescreen.
- Removed .dart_tool generated output that had been checked in,
  and added .gitignore file from flutter-homescreen so that things
  will hopefully stay clean in the future.

Bug-AGL: SPEC-4762

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Ie23091b759458b5a131bc2d85e62925238839166

1 files changed, 18 insertions, 2 deletions

diff --git a/lib/HomePage.dart b/lib/HomePage.dart
index accf7c1..36d8381 100644
--- a/lib/HomePage.dart
+++ b/lib/HomePage.dart
@@ -6,7 +6,9 @@ import 'package:dashboard_app/widgets/fuel_and_speed.dart';
 import 'package:dashboard_app/widgets/weather.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'vehicle-signals/vss_providers.dart';
+import 'package:dashboard_app/vehicle-signals/vss_client.dart';
+import 'package:dashboard_app/vehicle-signals/vss_provider.dart';
+import 'package:dashboard_app/vehicle-signals/vss_signal_providers.dart';
 
 class FuelRateText extends ConsumerWidget {
   final TextStyle style;
@@ -24,10 +26,24 @@ class FuelRateText extends ConsumerWidget {
   }
 }
 
-class HomePage extends StatelessWidget {
+class HomePage extends ConsumerStatefulWidget {
   const HomePage({Key? key}) : super(key: key);
 
   @override
+  _HomePageState createState() => _HomePageState();
+}
+
+class _HomePageState extends ConsumerState<HomePage> {
+  late VssClient vss;
+
+  initState() {
+    vss = ref.read(vssClientProvider);
+    vss.run();
+
+    super.initState();
+  }
+
+  @override
   Widget build(BuildContext context) {
     SizeConfig().init(context);