Working Low Battery Indicator

DynamicIsland/components/Settings/SettingsView.swift

@@ -586,6 +586,7 @@ struct SettingsView: View {
             SettingsSearchEntry(tab: .battery, title: "Show battery percentage", keywords: ["battery percent"], highlightID: SettingsTab.battery.highlightID(for: "Show battery percentage")),
             SettingsSearchEntry(tab: .battery, title: "Show power status notifications", keywords: ["notifications", "power"], highlightID: SettingsTab.battery.highlightID(for: "Show power status notifications")),
             SettingsSearchEntry(tab: .battery, title: "Show power status icons", keywords: ["power icons", "charging icon"], highlightID: SettingsTab.battery.highlightID(for: "Show power status icons")),
+            SettingsSearchEntry(tab: .battery, title: "Play low battery alert sound", keywords: ["low battery", "alert", "sound"], highlightID: SettingsTab.battery.highlightID(for: "Play low battery alert sound")),
 
             // HUDs
             SettingsSearchEntry(tab: .hud, title: "Show Bluetooth device connections", keywords: ["bluetooth", "hud"], highlightID: SettingsTab.hud.highlightID(for: "Show Bluetooth device connections")),
@@ -1050,6 +1051,8 @@ struct Charge: View {
                     .settingsHighlight(id: highlightID("Show battery indicator"))
                 Defaults.Toggle("Show power status notifications", key: .showPowerStatusNotifications)
                     .settingsHighlight(id: highlightID("Show power status notifications"))
+                Defaults.Toggle("Play low battery alert sound", key: .playLowBatteryAlertSound)
+                    .settingsHighlight(id: highlightID("Play low battery alert sound"))
             } header: {
                 Text("General")
             }

DynamicIsland/models/BatteryStatusViewModel.swift

@@ -11,6 +11,8 @@ class BatteryStatusViewModel: ObservableObject {
     private var powerSourceChangedCallback: IOPowerSourceCallbackType?
     private var runLoopSource: Unmanaged<CFRunLoopSource>?
     var animations: DynamicIslandAnimations = DynamicIslandAnimations()
+    private let lowBatteryAlertSoundPlayer = AudioPlayer()
+    private let lowBatteryAlertThresholds: [Float] = [20, 15, 10, 5]
 
     @ObservedObject var coordinator = DynamicIslandViewCoordinator.shared
 
@@ -63,6 +65,8 @@ class BatteryStatusViewModel: ObservableObject {
 
         case .batteryLevelChanged(let level):
             print("🔋 Battery level: \(Int(level))%")
+            let previousLevel = self.levelBattery
+            self.handleLowBatteryAlertIfNeeded(previousLevel: previousLevel, newLevel: level)
             withAnimation {
                 self.levelBattery = level
             }
@@ -128,6 +132,25 @@ class BatteryStatusViewModel: ObservableObject {
         }
     }
 
+    private func handleLowBatteryAlertIfNeeded(previousLevel: Float, newLevel: Float) {
+        guard Defaults[.playLowBatteryAlertSound] else { return }
+        guard !isPluggedIn, !isCharging else { return }
+        guard newLevel < previousLevel else { return }
+
+        for threshold in lowBatteryAlertThresholds {
+            if previousLevel >= threshold && newLevel < threshold {
+                self.statusText = "Low battery"
+                notifyImportanChangeStatus()
+                playLowBatteryAlertSound()
+                break
+            }
+        }
+    }
+
+    private func playLowBatteryAlertSound() {
+        lowBatteryAlertSoundPlayer.play(fileName: "lowbattery", fileExtension: "mp3")
+    }
+
     deinit {
         print("🔌 Cleaning up battery monitoring...")
         if let managerBatteryId: Int = managerBatteryId {

DynamicIsland/models/Constants.swift

@@ -482,6 +482,7 @@ extension Defaults.Keys {
     static let showBatteryIndicator = Key<Bool>("showBatteryIndicator", default: true)
     static let showBatteryPercentage = Key<Bool>("showBatteryPercentage", default: true)
     static let showPowerStatusIcons = Key<Bool>("showPowerStatusIcons", default: true)
+    static let playLowBatteryAlertSound = Key<Bool>("playLowBatteryAlertSound", default: true)
     
         // MARK: Downloads
     static let enableDownloadListener = Key<Bool>("enableDownloadListener", default: true)