Implement audio settings

Changes:
- Rework KUKSA.val "VAL" gRPC API implementation to separate it
  from the vehicle model + notifier, and more easily allow using
  it from other notifiers.
- Move volume handling from the vehicle model + notifier to the
  audio set for clarity.
- Wire up the new VSS audio signals in the audio notifier. The
  "rearFront" variable naming has been changed to "fade" in
  several places to match expected terminology.
- Add a balance slider to the audio settings page.
- Change the min/max labels on the fade slider to be Text instead
  of Icon's since we do not have the equivalent to use with the
  balance slider, and text seems like it'd be what you would want
  for any potential future internationalization.
- Rework configuration file to be usable from anywhere via a
  RiverPod Provider instead of tied to the vehicle notifier code,
  and shifted the background and hybrid animation flags to be handled
  with it.  This change removes the built-in asset with defaults in
  favor of maintaining the defaults for the ICS environment in the
  AppConfig and KuksaConfig classes, with a goal of avoiding the need
  for using async methods in the config provider.
- Change some notifiers from using StateNotifier to the RiverPod
  2.0 Notifier class for improved flexibility.  The other notifiers
  will be updated in future work.
- Added select's to several ref.watches in the new hybrid animation
  code to avoid unnecessary repaints.
- Fix several spelling issues in method and parameter names
  across the codebase.

Bug-AGL: SPEC-5001

Change-Id: Iefae417fa870405d659303497d96e519e6b6d1de
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

1 files changed, 162 insertions, 0 deletions

diff --git a/lib/data/data_providers/app_config_provider.dart b/lib/data/data_providers/app_config_provider.dart
new file mode 100644
index 0000000..7e0ddc6
--- /dev/null
+++ b/lib/data/data_providers/app_config_provider.dart
@@ -0,0 +1,162 @@
+import 'dart:io';
+import 'package:flutter/foundation.dart';
+import 'package:flutter_ics_homescreen/core/constants/constants.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:yaml/yaml.dart';
+
+class KuksaConfig {
+  final String hostname;
+  final int port;
+  final String authorization;
+  final bool use_tls;
+  final List<int> ca_certificate;
+  final String tls_server_name;
+
+  static String defaultHostname = 'localhost';
+  static int defaultPort = 55555;
+  static String defaultCaCertPath = '/etc/kuksa-val/CA.pem';
+
+  KuksaConfig(
+      {required this.hostname,
+      required this.port,
+      required this.authorization,
+      required this.use_tls,
+      required this.ca_certificate,
+      required this.tls_server_name});
+
+  static KuksaConfig defaultConfig() {
+    return KuksaConfig(
+        hostname: KuksaConfig.defaultHostname,
+        port: KuksaConfig.defaultPort,
+        authorization: "",
+        use_tls: false,
+        ca_certificate: [],
+        tls_server_name: "");
+  }
+}
+
+class AppConfig {
+  final bool disableBkgAnimation;
+  final bool randomHybridAnimation;
+  final KuksaConfig kuksaConfig;
+
+  static String configFilePath = '/etc/xdg/AGL/ics-homescreen.yaml';
+
+  AppConfig({required this.disableBkgAnimation, required this.randomHybridAnimation, required this.kuksaConfig});
+
+  static KuksaConfig parseKuksaConfig(YamlMap kuksaMap) {
+    try {
+      String hostname = KuksaConfig.defaultHostname;
+      if (kuksaMap.containsKey('hostname')) {
+        hostname = kuksaMap['hostname'];
+      }
+
+      int port = KuksaConfig.defaultPort;
+      if (kuksaMap.containsKey('port')) {
+        port = kuksaMap['port'];
+      }
+
+      String token = "";
+      if (kuksaMap.containsKey('authorization')) {
+        String s = kuksaMap['authorization'];
+        if (s.isNotEmpty) {
+          if (s.startsWith("/")) {
+            debugPrint("Reading authorization token $s");
+            try {
+              token = File(s).readAsStringSync();
+            } on Exception catch (_) {
+              print("ERROR: Could not read authorization token file $token");
+              token = "";
+            }
+          } else {
+            token = s;
+          }
+        }
+      }
+      //debugPrint("authorization = $token");
+
+      bool use_tls = false;
+      if (kuksaMap.containsKey('use-tls')) {
+        var value = kuksaMap['use-tls'];
+        if (value is bool) use_tls = value;
+      }
+      //debugPrint("Use TLS = $use_tls");
+
+      List<int> ca_cert = [];
+      String ca_path = KuksaConfig.defaultCaCertPath;
+      if (kuksaMap.containsKey('ca-certificate')) {
+        ca_path = kuksaMap['ca-certificate'];
+      }
+      try {
+        ca_cert = File(ca_path).readAsBytesSync();
+      } on Exception catch (_) {
+        print("ERROR: Could not read CA certificate file $ca_path");
+        ca_cert = [];
+      }
+      //debugPrint("CA cert = $ca_cert");
+
+      String tls_server_name = "";
+      if (kuksaMap.containsKey('tls-server-name')) {
+        tls_server_name = kuksaMap['tls_server_name'];
+      }
+
+      return KuksaConfig(
+          hostname: hostname,
+          port: port,
+          authorization: token,
+          use_tls: use_tls,
+          ca_certificate: ca_cert,
+          tls_server_name: tls_server_name);
+    } on Exception catch (_) {
+      return KuksaConfig.defaultConfig();
+    }
+  }
+}
+
+final appConfigProvider = Provider((ref) {
+  final configFile = File(AppConfig.configFilePath);
+  try {
+    print("Reading configuration ${AppConfig.configFilePath}");
+    String content = configFile.readAsStringSync();
+    final dynamic yamlMap = loadYaml(content);
+
+    KuksaConfig kuksaConfig;
+    if (yamlMap.containsKey('kuksa')) {
+      kuksaConfig = AppConfig.parseKuksaConfig(yamlMap['kuksa']);
+    } else {
+      kuksaConfig = KuksaConfig(
+          hostname: KuksaConfig.defaultHostname,
+          port: KuksaConfig.defaultPort,
+          authorization: "",
+          use_tls: false,
+          ca_certificate: [],
+          tls_server_name: "");
+    }
+
+    bool disableBkgAnimation = disableBkgAnimationDefault;
+    if (yamlMap.containsKey('disable-bg-animation')) {
+      var value = yamlMap['disable-bg-animation'];
+      if (value is bool) {
+        disableBkgAnimation = value;
+      }
+    }
+
+    bool randomHybridAnimation = randomHybridAnimationDefault;
+    if (yamlMap.containsKey('random-hybrid-animation')) {
+      var value = yamlMap['random-hybrid-animation'];
+      if (value is bool) {
+        randomHybridAnimation = value;
+      }
+    }
+
+    return AppConfig(
+        disableBkgAnimation: disableBkgAnimation,
+        randomHybridAnimation: randomHybridAnimation,
+        kuksaConfig: kuksaConfig);
+  } on Exception catch (_) {
+    return AppConfig(
+        disableBkgAnimation: false,
+        randomHybridAnimation: false,
+        kuksaConfig: KuksaConfig.defaultConfig());
+  }
+});