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 hvac-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 "hvac.yaml" instead
  of "hvac_config.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.
- The Vehicle and VehicleSignals classes have been reworked into
  a VehicleAcStatus class + provider, and users have been updated
  to use the Riverpod provider select functionality to attempt to
  reduce naive over-updating.
- VSS paths have been rationalized to use the definitions in the
  VSSPath class so only one location will need to be updated on any
  signal name changes.
- Added .gitignore file from flutter-homescreen to keep things
  clean in the future.

Bug-AGL: SPEC-4762

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Idbabb54ead52bf38796f264a3c8a270aa170e2cd

3 files changed, 29 insertions, 48 deletions

diff --git a/lib/widgets/left_climate.dart b/lib/widgets/left_climate.dart
index b45eb0b..6e9d275 100644
--- a/lib/widgets/left_climate.dart
+++ b/lib/widgets/left_climate.dart
@@ -3,16 +3,15 @@
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:flutter_hvac/provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_signal_providers.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_path.dart';
 import 'package:numberpicker/numberpicker.dart';
 
-import '../kuksa-server/vehicle_methods.dart';
 import '../size.dart';
 
 class LeftClimateScrollWidget extends ConsumerWidget {
-  LeftClimateScrollWidget({Key? key, required this.socket}) : super(key: key);
-
-  WebSocket socket;
+  LeftClimateScrollWidget({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context, ref) {
@@ -41,16 +40,11 @@ class LeftClimateScrollWidget extends ConsumerWidget {
                 },
                 onChanged: (value) {
                   ref.read(LeftClimateTempProvider.notifier).update(value);
-                  VISS.set(
-                      socket,
-                      ref,
-                      'Vehicle.Cabin.HVAC.Station.Row1.Left.Temperature',
-                      value.toString());
-                  VISS.set(
-                      socket,
-                      ref,
-                      'Vehicle.Cabin.HVAC.Station.Row2.Left.Temperature',
-                      value.toString());
+                  var vss = ref.read(vssClientProvider);
+                  if (vss != null) {
+                    vss.setInt32(VSSPath.vehicleFrontLeftTemp, value);
+                    vss.setInt32(VSSPath.vehicleRearLeftTemp, value);
+                  }
                 },
                 selectedTextStyle: TextStyle(
                   color: Colors.lightBlueAccent,
diff --git a/lib/widgets/right_climate.dart b/lib/widgets/right_climate.dart
index 590b511..9b2cc39 100644
--- a/lib/widgets/right_climate.dart
+++ b/lib/widgets/right_climate.dart
@@ -3,16 +3,15 @@
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:flutter_hvac/provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_signal_providers.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_path.dart';
 import 'package:numberpicker/numberpicker.dart';
 
-import '../kuksa-server/vehicle_methods.dart';
 import '../size.dart';
 
 class RightClimateScrollWidget extends ConsumerWidget {
-  RightClimateScrollWidget({Key? key, required this.socket}) : super(key: key);
-
-  WebSocket socket;
+  RightClimateScrollWidget({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context, ref) {
@@ -40,16 +39,11 @@ class RightClimateScrollWidget extends ConsumerWidget {
                 },
                 onChanged: (value) {
                   ref.read(RightClimateTempProvider.notifier).update(value);
-                  VISS.set(
-                      socket,
-                      ref,
-                      'Vehicle.Cabin.HVAC.Station.Row1.Right.Temperature',
-                      value.toString());
-                  VISS.set(
-                      socket,
-                      ref,
-                      'Vehicle.Cabin.HVAC.Station.Row2.Right.Temperature',
-                      value.toString());
+                  var vss = ref.read(vssClientProvider);
+                  if (vss != null) {
+                    vss.setInt32(VSSPath.vehicleFrontRightTemp, value);
+                    vss.setInt32(VSSPath.vehicleRearRightTemp, value);
+                  }
                 },
                 selectedTextStyle: TextStyle(
                   color: Colors.lightBlueAccent,
diff --git a/lib/widgets/slider.dart b/lib/widgets/slider.dart
index f8bd459..7ca5461 100644
--- a/lib/widgets/slider.dart
+++ b/lib/widgets/slider.dart
@@ -4,14 +4,14 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:flutter_hvac/provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_provider.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_signal_providers.dart';
+import 'package:flutter_hvac/vehicle-signals/vss_path.dart';
 
-import '../kuksa-server/vehicle_methods.dart';
 import '../size.dart';
 
 class SliderControl extends ConsumerWidget {
-  WebSocket socket;
-  SliderControl({Key? key, required this.socket}) : super(key: key);
+  SliderControl({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context, ref) {
@@ -22,20 +22,13 @@ class SliderControl extends ConsumerWidget {
         value: ref.watch(fanSpeedProvider).toDouble(),
         onChanged: (value) {
           ref.read(fanSpeedProvider.notifier).update(value.toInt());
-          VISS.set(socket, ref, 'Vehicle.Cabin.HVAC.Station.Row1.Left.FanSpeed',
-              value.toInt().toString());
-          VISS.set(
-              socket,
-              ref,
-              'Vehicle.Cabin.HVAC.Station.Row1.Right.FanSpeed',
-              value.toInt().toString());
-          VISS.set(socket, ref, 'Vehicle.Cabin.HVAC.Station.Row2.Left.FanSpeed',
-              value.toInt().toString());
-          VISS.set(
-              socket,
-              ref,
-              'Vehicle.Cabin.HVAC.Station.Row2.Right.FanSpeed',
-              value.toInt().toString());
+          var vss = ref.read(vssClientProvider);
+          if (vss != null) {
+            vss.setUint32(VSSPath.vehicleFrontLeftFanSpeed, value.toInt());
+            vss.setUint32(VSSPath.vehicleFrontRightFanSpeed, value.toInt());
+            vss.setUint32(VSSPath.vehicleRearLeftFanSpeed, value.toInt());
+            vss.setUint32(VSSPath.vehicleRearRightFanSpeed, value.toInt());
+          }
         },
         min: 0,
         max: 100,