Configurable units fixes

Notable changes:
- Add pressure unit to the units model.
- Add tire pressure unit configuration page under settings.
- Rework the VSS client, provider, and the associated handling in
  the vehicle and audio state providers to make the signal updating
  code reusable for processing the result of VAL API get commands.
- Add logic to get the initial values of the used VSS signals so
  the initial application state looks sane in demo scenarios.
- Add VSS signal support to the units provider so that changes will
  be pushed out for e.g. IC use.
- Fix pressure unit use in various widgets.
- Fix up range calculation for dashboard to correctly account for
  units and the incoming VSS value being in meters.
- Fix some unit naming inconsistencies around capitalization.

Bug-AGL: SPEC-5031, SPEC-5032

Change-Id: I33ac735dfbe35283bd30c92aa157cbdb7af1837c
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

1 files changed, 62 insertions, 3 deletions

diff --git a/lib/data/data_providers/units_notifier.dart b/lib/data/data_providers/units_notifier.dart
index f7c25aa..26b79da 100644
--- a/lib/data/data_providers/units_notifier.dart
+++ b/lib/data/data_providers/units_notifier.dart
@@ -1,13 +1,72 @@
-import '../../export.dart';
+import 'package:flutter_ics_homescreen/export.dart';
+import 'package:protos/val-api.dart';
 
-class UnitsNotifier extends StateNotifier<Units> {
-  UnitsNotifier(super.state);
+class UnitsNotifier extends Notifier<Units> {
+  @override
+  Units build() {
+    return const Units.initial();
+  }
+
+  bool handleSignalUpdate(DataEntry entry) {
+    bool handled = true;
+    switch (entry.path) {
+      case VSSPath.vehicleHmiDistanceUnit:
+        if (entry.value.hasString()) {
+          String value = entry.value.string;
+          DistanceUnit unit = DistanceUnit.kilometers;
+          if (value != "KILOMETERS") unit = DistanceUnit.miles;
+          state = state.copyWith(distanceUnit: unit);
+        }
+        break;
+      case VSSPath.vehicleHmiTemperatureUnit:
+        if (entry.value.hasString()) {
+          String value = entry.value.string;
+          TemperatureUnit unit = TemperatureUnit.celsius;
+          if (value != "C") unit = TemperatureUnit.fahrenheit;
+          state = state.copyWith(temperatureUnit: unit);
+        }
+        break;
+      case VSSPath.vehicleHmiPressureUnit:
+        if (entry.value.hasString()) {
+          String value = entry.value.string;
+          PressureUnit unit = PressureUnit.kilopascals;
+          if (value != "KPA") unit = PressureUnit.psi;
+          state = state.copyWith(pressureUnit: unit);
+        }
+        break;
+      default:
+        handled = false;
+    }
+    return handled;
+  }
 
   void setDistanceUnit(DistanceUnit unit) {
     state = state.copyWith(distanceUnit: unit);
+    var valClient = ref.read(valClientProvider);
+    valClient.setString(
+      VSSPath.vehicleHmiDistanceUnit,
+      unit == DistanceUnit.kilometers ? "KILOMETERS" : "MILES",
+      true,
+    );
   }
 
   void setTemperatureUnit(TemperatureUnit unit) {
     state = state.copyWith(temperatureUnit: unit);
+    var valClient = ref.read(valClientProvider);
+    valClient.setString(
+      VSSPath.vehicleHmiTemperatureUnit,
+      unit == TemperatureUnit.celsius ? "C" : "F",
+      true,
+    );
+  }
+
+  void setPressureUnit(PressureUnit unit) {
+    state = state.copyWith(pressureUnit: unit);
+    var valClient = ref.read(valClientProvider);
+    valClient.setString(
+      VSSPath.vehicleHmiPressureUnit,
+      unit == PressureUnit.kilopascals ? "KPA" : "PSI",
+      true,
+    );
   }
 }