[mob][photos] Hook iOS into MLController for temperature check only

mobile/lib/services/machine_learning/face_ml/face_ml_service.dart

@@ -137,26 +137,22 @@ class FaceMlService {
       _mlControllerStatus = !Platform.isAndroid;
 
       /// hooking FaceML into [MachineLearningController]
-      if (Platform.isAndroid) {
-        Bus.instance.on<MachineLearningControlEvent>().listen((event) {
-          if (LocalSettings.instance.isFaceIndexingEnabled == false) {
-            return;
-          }
-          _mlControllerStatus = event.shouldRun;
-          if (_mlControllerStatus) {
-            _logger.info(
-              "MLController allowed running ML, faces indexing starting",
-            );
-            unawaited(indexAndClusterAll());
-          } else {
-            _logger
-                .info("MLController stopped running ML, faces indexing paused");
-            pauseIndexingAndClustering();
-          }
-        });
-      } else {
-        unawaited(indexAndClusterAll());
-      }
+      Bus.instance.on<MachineLearningControlEvent>().listen((event) {
+        if (LocalSettings.instance.isFaceIndexingEnabled == false) {
+          return;
+        }
+        _mlControllerStatus = event.shouldRun;
+        if (_mlControllerStatus) {
+          _logger.info(
+            "MLController allowed running ML, faces indexing starting",
+          );
+          unawaited(indexAndClusterAll());
+        } else {
+          _logger
+              .info("MLController stopped running ML, faces indexing paused");
+          pauseIndexingAndClustering();
+        }
+      });
 
       _listenIndexOnDiffSync();
       _listenOnPeopleChangedSync();

mobile/lib/services/machine_learning/machine_learning_controller.dart

@@ -3,6 +3,7 @@ import "dart:io";
 
 import "package:battery_info/battery_info_plugin.dart";
 import "package:battery_info/model/android_battery_info.dart";
+import "package:battery_info/model/iso_battery_info.dart";
 import "package:flutter/foundation.dart" show kDebugMode;
 import "package:logging/logging.dart";
 import "package:photos/core/event_bus.dart";
@@ -33,13 +34,17 @@ class MachineLearningController {
       BatteryInfoPlugin()
           .androidBatteryInfoStream
           .listen((AndroidBatteryInfo? batteryInfo) {
-        _onBatteryStateUpdate(batteryInfo);
+        _onAndroidBatteryStateUpdate(batteryInfo);
       });
-    } else {
-      // Always run Machine Learning on iOS
-      _canRunML = true;
-      Bus.instance.fire(MachineLearningControlEvent(true));
     }
+    if (Platform.isIOS) {
+      BatteryInfoPlugin()
+          .iosBatteryInfoStream
+          .listen((IosBatteryInfo? batteryInfo) {
+        _oniOSBatteryStateUpdate(batteryInfo);
+      });
+    }
+    _fireControlEvent();
   }
 
   void onUserInteraction() {
@@ -55,7 +60,8 @@ class MachineLearningController {
   }
 
   void _fireControlEvent() {
-    final shouldRunML = _isDeviceHealthy && !_isUserInteracting;
+    final shouldRunML =
+        _isDeviceHealthy && (Platform.isAndroid ? !_isUserInteracting : true);
     if (shouldRunML != _canRunML) {
       _canRunML = shouldRunML;
       _logger.info(
@@ -78,18 +84,28 @@ class MachineLearningController {
     _startInteractionTimer();
   }
 
-  void _onBatteryStateUpdate(AndroidBatteryInfo? batteryInfo) {
+  void _onAndroidBatteryStateUpdate(AndroidBatteryInfo? batteryInfo) {
     _logger.info("Battery info: ${batteryInfo!.toJson()}");
-    _isDeviceHealthy = _computeIsDeviceHealthy(batteryInfo);
+    _isDeviceHealthy = _computeIsAndroidDeviceHealthy(batteryInfo);
     _fireControlEvent();
   }
 
-  bool _computeIsDeviceHealthy(AndroidBatteryInfo info) {
+  void _oniOSBatteryStateUpdate(IosBatteryInfo? batteryInfo) {
+    _logger.info("Battery info: ${batteryInfo!.toJson()}");
+    _isDeviceHealthy = _computeIsiOSDeviceHealthy(batteryInfo);
+    _fireControlEvent();
+  }
+
+  bool _computeIsAndroidDeviceHealthy(AndroidBatteryInfo info) {
     return _hasSufficientBattery(info.batteryLevel ?? kMinimumBatteryLevel) &&
         _isAcceptableTemperature(info.temperature ?? kMaximumTemperature) &&
         _isBatteryHealthy(info.health ?? "");
   }
 
+  bool _computeIsiOSDeviceHealthy(IosBatteryInfo info) {
+    return _hasSufficientBattery(info.batteryLevel ?? kMinimumBatteryLevel);
+  }
+
   bool _hasSufficientBattery(int batteryLevel) {
     return batteryLevel >= kMinimumBatteryLevel;
   }

mobile/lib/services/machine_learning/semantic_search/semantic_search_service.dart

@@ -1,6 +1,5 @@
 import "dart:async";
 import "dart:collection";
-import "dart:io";
 import "dart:math" show min;
 
 import "package:computer/computer.dart";
@@ -103,17 +102,13 @@ class SemanticSearchService {
     if (shouldSyncImmediately) {
       unawaited(sync());
     }
-    if (Platform.isAndroid) {
-      Bus.instance.on<MachineLearningControlEvent>().listen((event) {
-        if (event.shouldRun) {
-          _startIndexing();
-        } else {
-          _pauseIndexing();
-        }
-      });
-    } else {
-      _startIndexing();
-    }
+    Bus.instance.on<MachineLearningControlEvent>().listen((event) {
+      if (event.shouldRun) {
+        _startIndexing();
+      } else {
+        _pauseIndexing();
+      }
+    });
   }
 
   Future<void> release() async {