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 "flutter-" prefix has been dropped from the configuration
  file name (i.e. it's now just "cluster-dashboard.yaml") to match
  the naming used for the other Flutter applications.  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 the other applications.
- The unused navigation support has been removed to simplify
  maintenance, as it is more likely that it will be replaced with
  something else in the future than fixed to be usable.
- 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.  Since pubspec.lock is
  not checked in here, it has also been added to .gitignore.

Bug-AGL: SPEC-4762

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Id35c569cdbb8476a527717ece7b4bb369c4874b7

1 files changed, 159 insertions, 0 deletions

diff --git a/lib/generated/kuksa/val/v1/types.pbenum.dart b/lib/generated/kuksa/val/v1/types.pbenum.dart
new file mode 100644
index 0000000..745d50a
--- /dev/null
+++ b/lib/generated/kuksa/val/v1/types.pbenum.dart
@@ -0,0 +1,159 @@
+///
+//  Generated code. Do not modify.
+//  source: kuksa/val/v1/types.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
+
+// ignore_for_file: UNDEFINED_SHOWN_NAME
+import 'dart:core' as $core;
+import 'package:protobuf/protobuf.dart' as $pb;
+
+class DataType extends $pb.ProtobufEnum {
+  static const DataType DATA_TYPE_UNSPECIFIED = DataType._(0, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UNSPECIFIED');
+  static const DataType DATA_TYPE_STRING = DataType._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_STRING');
+  static const DataType DATA_TYPE_BOOLEAN = DataType._(2, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_BOOLEAN');
+  static const DataType DATA_TYPE_INT8 = DataType._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT8');
+  static const DataType DATA_TYPE_INT16 = DataType._(4, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT16');
+  static const DataType DATA_TYPE_INT32 = DataType._(5, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT32');
+  static const DataType DATA_TYPE_INT64 = DataType._(6, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT64');
+  static const DataType DATA_TYPE_UINT8 = DataType._(7, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT8');
+  static const DataType DATA_TYPE_UINT16 = DataType._(8, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT16');
+  static const DataType DATA_TYPE_UINT32 = DataType._(9, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT32');
+  static const DataType DATA_TYPE_UINT64 = DataType._(10, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT64');
+  static const DataType DATA_TYPE_FLOAT = DataType._(11, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_FLOAT');
+  static const DataType DATA_TYPE_DOUBLE = DataType._(12, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_DOUBLE');
+  static const DataType DATA_TYPE_TIMESTAMP = DataType._(13, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_TIMESTAMP');
+  static const DataType DATA_TYPE_STRING_ARRAY = DataType._(20, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_STRING_ARRAY');
+  static const DataType DATA_TYPE_BOOLEAN_ARRAY = DataType._(21, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_BOOLEAN_ARRAY');
+  static const DataType DATA_TYPE_INT8_ARRAY = DataType._(22, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT8_ARRAY');
+  static const DataType DATA_TYPE_INT16_ARRAY = DataType._(23, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT16_ARRAY');
+  static const DataType DATA_TYPE_INT32_ARRAY = DataType._(24, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT32_ARRAY');
+  static const DataType DATA_TYPE_INT64_ARRAY = DataType._(25, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_INT64_ARRAY');
+  static const DataType DATA_TYPE_UINT8_ARRAY = DataType._(26, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT8_ARRAY');
+  static const DataType DATA_TYPE_UINT16_ARRAY = DataType._(27, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT16_ARRAY');
+  static const DataType DATA_TYPE_UINT32_ARRAY = DataType._(28, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT32_ARRAY');
+  static const DataType DATA_TYPE_UINT64_ARRAY = DataType._(29, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_UINT64_ARRAY');
+  static const DataType DATA_TYPE_FLOAT_ARRAY = DataType._(30, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_FLOAT_ARRAY');
+  static const DataType DATA_TYPE_DOUBLE_ARRAY = DataType._(31, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_DOUBLE_ARRAY');
+  static const DataType DATA_TYPE_TIMESTAMP_ARRAY = DataType._(32, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'DATA_TYPE_TIMESTAMP_ARRAY');
+
+  static const $core.List<DataType> values = <DataType> [
+    DATA_TYPE_UNSPECIFIED,
+    DATA_TYPE_STRING,
+    DATA_TYPE_BOOLEAN,
+    DATA_TYPE_INT8,
+    DATA_TYPE_INT16,
+    DATA_TYPE_INT32,
+    DATA_TYPE_INT64,
+    DATA_TYPE_UINT8,
+    DATA_TYPE_UINT16,
+    DATA_TYPE_UINT32,
+    DATA_TYPE_UINT64,
+    DATA_TYPE_FLOAT,
+    DATA_TYPE_DOUBLE,
+    DATA_TYPE_TIMESTAMP,
+    DATA_TYPE_STRING_ARRAY,
+    DATA_TYPE_BOOLEAN_ARRAY,
+    DATA_TYPE_INT8_ARRAY,
+    DATA_TYPE_INT16_ARRAY,
+    DATA_TYPE_INT32_ARRAY,
+    DATA_TYPE_INT64_ARRAY,
+    DATA_TYPE_UINT8_ARRAY,
+    DATA_TYPE_UINT16_ARRAY,
+    DATA_TYPE_UINT32_ARRAY,
+    DATA_TYPE_UINT64_ARRAY,
+    DATA_TYPE_FLOAT_ARRAY,
+    DATA_TYPE_DOUBLE_ARRAY,
+    DATA_TYPE_TIMESTAMP_ARRAY,
+  ];
+
+  static final $core.Map<$core.int, DataType> _byValue = $pb.ProtobufEnum.initByValue(values);
+  static DataType? valueOf($core.int value) => _byValue[value];
+
+  const DataType._($core.int v, $core.String n) : super(v, n);
+}
+
+class EntryType extends $pb.ProtobufEnum {
+  static const EntryType ENTRY_TYPE_UNSPECIFIED = EntryType._(0, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'ENTRY_TYPE_UNSPECIFIED');
+  static const EntryType ENTRY_TYPE_ATTRIBUTE = EntryType._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'ENTRY_TYPE_ATTRIBUTE');
+  static const EntryType ENTRY_TYPE_SENSOR = EntryType._(2, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'ENTRY_TYPE_SENSOR');
+  static const EntryType ENTRY_TYPE_ACTUATOR = EntryType._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'ENTRY_TYPE_ACTUATOR');
+
+  static const $core.List<EntryType> values = <EntryType> [
+    ENTRY_TYPE_UNSPECIFIED,
+    ENTRY_TYPE_ATTRIBUTE,
+    ENTRY_TYPE_SENSOR,
+    ENTRY_TYPE_ACTUATOR,
+  ];
+
+  static final $core.Map<$core.int, EntryType> _byValue = $pb.ProtobufEnum.initByValue(values);
+  static EntryType? valueOf($core.int value) => _byValue[value];
+
+  const EntryType._($core.int v, $core.String n) : super(v, n);
+}
+
+class View extends $pb.ProtobufEnum {
+  static const View VIEW_UNSPECIFIED = View._(0, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_UNSPECIFIED');
+  static const View VIEW_CURRENT_VALUE = View._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_CURRENT_VALUE');
+  static const View VIEW_TARGET_VALUE = View._(2, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_TARGET_VALUE');
+  static const View VIEW_METADATA = View._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_METADATA');
+  static const View VIEW_FIELDS = View._(10, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_FIELDS');
+  static const View VIEW_ALL = View._(20, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'VIEW_ALL');
+
+  static const $core.List<View> values = <View> [
+    VIEW_UNSPECIFIED,
+    VIEW_CURRENT_VALUE,
+    VIEW_TARGET_VALUE,
+    VIEW_METADATA,
+    VIEW_FIELDS,
+    VIEW_ALL,
+  ];
+
+  static final $core.Map<$core.int, View> _byValue = $pb.ProtobufEnum.initByValue(values);
+  static View? valueOf($core.int value) => _byValue[value];
+
+  const View._($core.int v, $core.String n) : super(v, n);
+}
+
+class Field extends $pb.ProtobufEnum {
+  static const Field FIELD_UNSPECIFIED = Field._(0, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_UNSPECIFIED');
+  static const Field FIELD_PATH = Field._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_PATH');
+  static const Field FIELD_VALUE = Field._(2, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_VALUE');
+  static const Field FIELD_ACTUATOR_TARGET = Field._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_ACTUATOR_TARGET');
+  static const Field FIELD_METADATA = Field._(10, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA');
+  static const Field FIELD_METADATA_DATA_TYPE = Field._(11, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_DATA_TYPE');
+  static const Field FIELD_METADATA_DESCRIPTION = Field._(12, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_DESCRIPTION');
+  static const Field FIELD_METADATA_ENTRY_TYPE = Field._(13, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_ENTRY_TYPE');
+  static const Field FIELD_METADATA_COMMENT = Field._(14, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_COMMENT');
+  static const Field FIELD_METADATA_DEPRECATION = Field._(15, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_DEPRECATION');
+  static const Field FIELD_METADATA_UNIT = Field._(16, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_UNIT');
+  static const Field FIELD_METADATA_VALUE_RESTRICTION = Field._(17, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_VALUE_RESTRICTION');
+  static const Field FIELD_METADATA_ACTUATOR = Field._(20, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_ACTUATOR');
+  static const Field FIELD_METADATA_SENSOR = Field._(30, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_SENSOR');
+  static const Field FIELD_METADATA_ATTRIBUTE = Field._(40, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'FIELD_METADATA_ATTRIBUTE');
+
+  static const $core.List<Field> values = <Field> [
+    FIELD_UNSPECIFIED,
+    FIELD_PATH,
+    FIELD_VALUE,
+    FIELD_ACTUATOR_TARGET,
+    FIELD_METADATA,
+    FIELD_METADATA_DATA_TYPE,
+    FIELD_METADATA_DESCRIPTION,
+    FIELD_METADATA_ENTRY_TYPE,
+    FIELD_METADATA_COMMENT,
+    FIELD_METADATA_DEPRECATION,
+    FIELD_METADATA_UNIT,
+    FIELD_METADATA_VALUE_RESTRICTION,
+    FIELD_METADATA_ACTUATOR,
+    FIELD_METADATA_SENSOR,
+    FIELD_METADATA_ATTRIBUTE,
+  ];
+
+  static final $core.Map<$core.int, Field> _byValue = $pb.ProtobufEnum.initByValue(values);
+  static Field? valueOf($core.int value) => _byValue[value];
+
+  const Field._($core.int v, $core.String n) : super(v, n);
+}
+