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, 133 insertions, 0 deletions

diff --git a/lib/generated/kuksa/val/v1/val.pbgrpc.dart b/lib/generated/kuksa/val/v1/val.pbgrpc.dart
new file mode 100644
index 0000000..3a9a3c8
--- /dev/null
+++ b/lib/generated/kuksa/val/v1/val.pbgrpc.dart
@@ -0,0 +1,133 @@
+///
+//  Generated code. Do not modify.
+//  source: kuksa/val/v1/val.proto
+//
+// @dart = 2.12
+// ignore_for_file: annotate_overrides,camel_case_types,constant_identifier_names,directives_ordering,library_prefixes,non_constant_identifier_names,prefer_final_fields,return_of_invalid_type,unnecessary_const,unnecessary_import,unnecessary_this,unused_import,unused_shown_name
+
+import 'dart:async' as $async;
+
+import 'dart:core' as $core;
+
+import 'package:grpc/service_api.dart' as $grpc;
+import 'val.pb.dart' as $0;
+export 'val.pb.dart';
+
+class VALClient extends $grpc.Client {
+  static final _$get = $grpc.ClientMethod<$0.GetRequest, $0.GetResponse>(
+      '/kuksa.val.v1.VAL/Get',
+      ($0.GetRequest value) => value.writeToBuffer(),
+      ($core.List<$core.int> value) => $0.GetResponse.fromBuffer(value));
+  static final _$set = $grpc.ClientMethod<$0.SetRequest, $0.SetResponse>(
+      '/kuksa.val.v1.VAL/Set',
+      ($0.SetRequest value) => value.writeToBuffer(),
+      ($core.List<$core.int> value) => $0.SetResponse.fromBuffer(value));
+  static final _$subscribe =
+      $grpc.ClientMethod<$0.SubscribeRequest, $0.SubscribeResponse>(
+          '/kuksa.val.v1.VAL/Subscribe',
+          ($0.SubscribeRequest value) => value.writeToBuffer(),
+          ($core.List<$core.int> value) =>
+              $0.SubscribeResponse.fromBuffer(value));
+  static final _$getServerInfo =
+      $grpc.ClientMethod<$0.GetServerInfoRequest, $0.GetServerInfoResponse>(
+          '/kuksa.val.v1.VAL/GetServerInfo',
+          ($0.GetServerInfoRequest value) => value.writeToBuffer(),
+          ($core.List<$core.int> value) =>
+              $0.GetServerInfoResponse.fromBuffer(value));
+
+  VALClient($grpc.ClientChannel channel,
+      {$grpc.CallOptions? options,
+      $core.Iterable<$grpc.ClientInterceptor>? interceptors})
+      : super(channel, options: options, interceptors: interceptors);
+
+  $grpc.ResponseFuture<$0.GetResponse> get($0.GetRequest request,
+      {$grpc.CallOptions? options}) {
+    return $createUnaryCall(_$get, request, options: options);
+  }
+
+  $grpc.ResponseFuture<$0.SetResponse> set($0.SetRequest request,
+      {$grpc.CallOptions? options}) {
+    return $createUnaryCall(_$set, request, options: options);
+  }
+
+  $grpc.ResponseStream<$0.SubscribeResponse> subscribe(
+      $0.SubscribeRequest request,
+      {$grpc.CallOptions? options}) {
+    return $createStreamingCall(
+        _$subscribe, $async.Stream.fromIterable([request]),
+        options: options);
+  }
+
+  $grpc.ResponseFuture<$0.GetServerInfoResponse> getServerInfo(
+      $0.GetServerInfoRequest request,
+      {$grpc.CallOptions? options}) {
+    return $createUnaryCall(_$getServerInfo, request, options: options);
+  }
+}
+
+abstract class VALServiceBase extends $grpc.Service {
+  $core.String get $name => 'kuksa.val.v1.VAL';
+
+  VALServiceBase() {
+    $addMethod($grpc.ServiceMethod<$0.GetRequest, $0.GetResponse>(
+        'Get',
+        get_Pre,
+        false,
+        false,
+        ($core.List<$core.int> value) => $0.GetRequest.fromBuffer(value),
+        ($0.GetResponse value) => value.writeToBuffer()));
+    $addMethod($grpc.ServiceMethod<$0.SetRequest, $0.SetResponse>(
+        'Set',
+        set_Pre,
+        false,
+        false,
+        ($core.List<$core.int> value) => $0.SetRequest.fromBuffer(value),
+        ($0.SetResponse value) => value.writeToBuffer()));
+    $addMethod($grpc.ServiceMethod<$0.SubscribeRequest, $0.SubscribeResponse>(
+        'Subscribe',
+        subscribe_Pre,
+        false,
+        true,
+        ($core.List<$core.int> value) => $0.SubscribeRequest.fromBuffer(value),
+        ($0.SubscribeResponse value) => value.writeToBuffer()));
+    $addMethod(
+        $grpc.ServiceMethod<$0.GetServerInfoRequest, $0.GetServerInfoResponse>(
+            'GetServerInfo',
+            getServerInfo_Pre,
+            false,
+            false,
+            ($core.List<$core.int> value) =>
+                $0.GetServerInfoRequest.fromBuffer(value),
+            ($0.GetServerInfoResponse value) => value.writeToBuffer()));
+  }
+
+  $async.Future<$0.GetResponse> get_Pre(
+      $grpc.ServiceCall call, $async.Future<$0.GetRequest> request) async {
+    return get(call, await request);
+  }
+
+  $async.Future<$0.SetResponse> set_Pre(
+      $grpc.ServiceCall call, $async.Future<$0.SetRequest> request) async {
+    return set(call, await request);
+  }
+
+  $async.Stream<$0.SubscribeResponse> subscribe_Pre($grpc.ServiceCall call,
+      $async.Future<$0.SubscribeRequest> request) async* {
+    yield* subscribe(call, await request);
+  }
+
+  $async.Future<$0.GetServerInfoResponse> getServerInfo_Pre(
+      $grpc.ServiceCall call,
+      $async.Future<$0.GetServerInfoRequest> request) async {
+    return getServerInfo(call, await request);
+  }
+
+  $async.Future<$0.GetResponse> get(
+      $grpc.ServiceCall call, $0.GetRequest request);
+  $async.Future<$0.SetResponse> set(
+      $grpc.ServiceCall call, $0.SetRequest request);
+  $async.Stream<$0.SubscribeResponse> subscribe(
+      $grpc.ServiceCall call, $0.SubscribeRequest request);
+  $async.Future<$0.GetServerInfoResponse> getServerInfo(
+      $grpc.ServiceCall call, $0.GetServerInfoRequest request);
+}