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, 126 insertions, 0 deletions

diff --git a/lib/generated/kuksa/val/v1/val.pbjson.dart b/lib/generated/kuksa/val/v1/val.pbjson.dart
new file mode 100644
index 0000000..e6c035c
--- /dev/null
+++ b/lib/generated/kuksa/val/v1/val.pbjson.dart
@@ -0,0 +1,126 @@
+///
+//  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,deprecated_member_use_from_same_package,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:core' as $core;
+import 'dart:convert' as $convert;
+import 'dart:typed_data' as $typed_data;
+@$core.Deprecated('Use entryRequestDescriptor instead')
+const EntryRequest$json = const {
+  '1': 'EntryRequest',
+  '2': const [
+    const {'1': 'path', '3': 1, '4': 1, '5': 9, '10': 'path'},
+    const {'1': 'view', '3': 2, '4': 1, '5': 14, '6': '.kuksa.val.v1.View', '10': 'view'},
+    const {'1': 'fields', '3': 3, '4': 3, '5': 14, '6': '.kuksa.val.v1.Field', '10': 'fields'},
+  ],
+};
+
+/// Descriptor for `EntryRequest`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List entryRequestDescriptor = $convert.base64Decode('CgxFbnRyeVJlcXVlc3QSEgoEcGF0aBgBIAEoCVIEcGF0aBImCgR2aWV3GAIgASgOMhIua3Vrc2EudmFsLnYxLlZpZXdSBHZpZXcSKwoGZmllbGRzGAMgAygOMhMua3Vrc2EudmFsLnYxLkZpZWxkUgZmaWVsZHM=');
+@$core.Deprecated('Use getRequestDescriptor instead')
+const GetRequest$json = const {
+  '1': 'GetRequest',
+  '2': const [
+    const {'1': 'entries', '3': 1, '4': 3, '5': 11, '6': '.kuksa.val.v1.EntryRequest', '10': 'entries'},
+  ],
+};
+
+/// Descriptor for `GetRequest`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List getRequestDescriptor = $convert.base64Decode('CgpHZXRSZXF1ZXN0EjQKB2VudHJpZXMYASADKAsyGi5rdWtzYS52YWwudjEuRW50cnlSZXF1ZXN0UgdlbnRyaWVz');
+@$core.Deprecated('Use getResponseDescriptor instead')
+const GetResponse$json = const {
+  '1': 'GetResponse',
+  '2': const [
+    const {'1': 'entries', '3': 1, '4': 3, '5': 11, '6': '.kuksa.val.v1.DataEntry', '10': 'entries'},
+    const {'1': 'errors', '3': 2, '4': 3, '5': 11, '6': '.kuksa.val.v1.DataEntryError', '10': 'errors'},
+    const {'1': 'error', '3': 3, '4': 1, '5': 11, '6': '.kuksa.val.v1.Error', '10': 'error'},
+  ],
+};
+
+/// Descriptor for `GetResponse`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List getResponseDescriptor = $convert.base64Decode('CgtHZXRSZXNwb25zZRIxCgdlbnRyaWVzGAEgAygLMhcua3Vrc2EudmFsLnYxLkRhdGFFbnRyeVIHZW50cmllcxI0CgZlcnJvcnMYAiADKAsyHC5rdWtzYS52YWwudjEuRGF0YUVudHJ5RXJyb3JSBmVycm9ycxIpCgVlcnJvchgDIAEoCzITLmt1a3NhLnZhbC52MS5FcnJvclIFZXJyb3I=');
+@$core.Deprecated('Use entryUpdateDescriptor instead')
+const EntryUpdate$json = const {
+  '1': 'EntryUpdate',
+  '2': const [
+    const {'1': 'entry', '3': 1, '4': 1, '5': 11, '6': '.kuksa.val.v1.DataEntry', '10': 'entry'},
+    const {'1': 'fields', '3': 2, '4': 3, '5': 14, '6': '.kuksa.val.v1.Field', '10': 'fields'},
+  ],
+};
+
+/// Descriptor for `EntryUpdate`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List entryUpdateDescriptor = $convert.base64Decode('CgtFbnRyeVVwZGF0ZRItCgVlbnRyeRgBIAEoCzIXLmt1a3NhLnZhbC52MS5EYXRhRW50cnlSBWVudHJ5EisKBmZpZWxkcxgCIAMoDjITLmt1a3NhLnZhbC52MS5GaWVsZFIGZmllbGRz');
+@$core.Deprecated('Use setRequestDescriptor instead')
+const SetRequest$json = const {
+  '1': 'SetRequest',
+  '2': const [
+    const {'1': 'updates', '3': 1, '4': 3, '5': 11, '6': '.kuksa.val.v1.EntryUpdate', '10': 'updates'},
+  ],
+};
+
+/// Descriptor for `SetRequest`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List setRequestDescriptor = $convert.base64Decode('CgpTZXRSZXF1ZXN0EjMKB3VwZGF0ZXMYASADKAsyGS5rdWtzYS52YWwudjEuRW50cnlVcGRhdGVSB3VwZGF0ZXM=');
+@$core.Deprecated('Use setResponseDescriptor instead')
+const SetResponse$json = const {
+  '1': 'SetResponse',
+  '2': const [
+    const {'1': 'error', '3': 1, '4': 1, '5': 11, '6': '.kuksa.val.v1.Error', '10': 'error'},
+    const {'1': 'errors', '3': 2, '4': 3, '5': 11, '6': '.kuksa.val.v1.DataEntryError', '10': 'errors'},
+  ],
+};
+
+/// Descriptor for `SetResponse`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List setResponseDescriptor = $convert.base64Decode('CgtTZXRSZXNwb25zZRIpCgVlcnJvchgBIAEoCzITLmt1a3NhLnZhbC52MS5FcnJvclIFZXJyb3ISNAoGZXJyb3JzGAIgAygLMhwua3Vrc2EudmFsLnYxLkRhdGFFbnRyeUVycm9yUgZlcnJvcnM=');
+@$core.Deprecated('Use subscribeEntryDescriptor instead')
+const SubscribeEntry$json = const {
+  '1': 'SubscribeEntry',
+  '2': const [
+    const {'1': 'path', '3': 1, '4': 1, '5': 9, '10': 'path'},
+    const {'1': 'view', '3': 2, '4': 1, '5': 14, '6': '.kuksa.val.v1.View', '10': 'view'},
+    const {'1': 'fields', '3': 3, '4': 3, '5': 14, '6': '.kuksa.val.v1.Field', '10': 'fields'},
+  ],
+};
+
+/// Descriptor for `SubscribeEntry`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List subscribeEntryDescriptor = $convert.base64Decode('Cg5TdWJzY3JpYmVFbnRyeRISCgRwYXRoGAEgASgJUgRwYXRoEiYKBHZpZXcYAiABKA4yEi5rdWtzYS52YWwudjEuVmlld1IEdmlldxIrCgZmaWVsZHMYAyADKA4yEy5rdWtzYS52YWwudjEuRmllbGRSBmZpZWxkcw==');
+@$core.Deprecated('Use subscribeRequestDescriptor instead')
+const SubscribeRequest$json = const {
+  '1': 'SubscribeRequest',
+  '2': const [
+    const {'1': 'entries', '3': 1, '4': 3, '5': 11, '6': '.kuksa.val.v1.SubscribeEntry', '10': 'entries'},
+  ],
+};
+
+/// Descriptor for `SubscribeRequest`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List subscribeRequestDescriptor = $convert.base64Decode('ChBTdWJzY3JpYmVSZXF1ZXN0EjYKB2VudHJpZXMYASADKAsyHC5rdWtzYS52YWwudjEuU3Vic2NyaWJlRW50cnlSB2VudHJpZXM=');
+@$core.Deprecated('Use subscribeResponseDescriptor instead')
+const SubscribeResponse$json = const {
+  '1': 'SubscribeResponse',
+  '2': const [
+    const {'1': 'updates', '3': 1, '4': 3, '5': 11, '6': '.kuksa.val.v1.EntryUpdate', '10': 'updates'},
+  ],
+};
+
+/// Descriptor for `SubscribeResponse`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List subscribeResponseDescriptor = $convert.base64Decode('ChFTdWJzY3JpYmVSZXNwb25zZRIzCgd1cGRhdGVzGAEgAygLMhkua3Vrc2EudmFsLnYxLkVudHJ5VXBkYXRlUgd1cGRhdGVz');
+@$core.Deprecated('Use getServerInfoRequestDescriptor instead')
+const GetServerInfoRequest$json = const {
+  '1': 'GetServerInfoRequest',
+};
+
+/// Descriptor for `GetServerInfoRequest`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List getServerInfoRequestDescriptor = $convert.base64Decode('ChRHZXRTZXJ2ZXJJbmZvUmVxdWVzdA==');
+@$core.Deprecated('Use getServerInfoResponseDescriptor instead')
+const GetServerInfoResponse$json = const {
+  '1': 'GetServerInfoResponse',
+  '2': const [
+    const {'1': 'name', '3': 1, '4': 1, '5': 9, '10': 'name'},
+    const {'1': 'version', '3': 2, '4': 1, '5': 9, '10': 'version'},
+  ],
+};
+
+/// Descriptor for `GetServerInfoResponse`. Decode as a `google.protobuf.DescriptorProto`.
+final $typed_data.Uint8List getServerInfoResponseDescriptor = $convert.base64Decode('ChVHZXRTZXJ2ZXJJbmZvUmVzcG9uc2USEgoEbmFtZRgBIAEoCVIEbmFtZRIYCgd2ZXJzaW9uGAIgASgJUgd2ZXJzaW9u');