9b92fb715a
- PowerInfo model + BatteryMath (health %, condition, watts, time fmt) — unit-tested - PowerMonitor reads AppleSmartBattery via IORegistry (no root/entitlements): charge, cycles, design/raw-max capacity, temperature, voltage, amperage, time-to-empty/full, adapter watts; graceful no-battery (desktop) path - Wire powerInfo into SystemMonitor (every 3rd cycle) - Battery & Power section in Power & Storage tab; battery in menu-bar dropdown - 10 new tests (42 total); cross-checked vs pmset/ioreg: health 96.9%, 114 cycles, 30.8C, matches ground truth exactly Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
78 sor
3.5 KiB
Swift
78 sor
3.5 KiB
Swift
import Foundation
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import IOKit
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/// Reads battery / power state from the AppleSmartBattery IORegistry entry.
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/// No entitlements or root required. On a desktop Mac (no battery) it reports
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/// `hasBattery == false` and AC power.
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final class PowerMonitor {
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func fetchPowerInfo() -> PowerInfo {
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let service = IOServiceGetMatchingService(kIOMainPortDefault, IOServiceMatching("AppleSmartBattery"))
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guard service != 0 else {
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// No battery (e.g. Mac mini / Studio / Pro): assume AC power.
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return PowerInfo(
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hasBattery: false, currentCharge: 100, isCharging: false, isPluggedIn: true,
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fullyCharged: true, cycleCount: nil, designCapacity: nil, maxCapacity: nil,
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temperature: nil, voltage: nil, amperage: nil, timeToEmpty: nil,
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timeToFull: nil, adapterWatts: nil
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)
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}
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defer { IOObjectRelease(service) }
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var unmanagedProps: Unmanaged<CFMutableDictionary>?
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guard IORegistryEntryCreateCFProperties(service, &unmanagedProps, kCFAllocatorDefault, 0) == KERN_SUCCESS,
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let props = unmanagedProps?.takeRetainedValue() as? [String: Any] else {
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return PowerInfo(
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hasBattery: false, currentCharge: 100, isCharging: false, isPluggedIn: true,
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fullyCharged: true, cycleCount: nil, designCapacity: nil, maxCapacity: nil,
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temperature: nil, voltage: nil, amperage: nil, timeToEmpty: nil,
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timeToFull: nil, adapterWatts: nil
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)
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}
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let int = { (key: String) -> Int? in props[key] as? Int }
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let bool = { (key: String) -> Bool? in props[key] as? Bool }
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// Percent charge: CurrentCapacity is 0–100 on Apple Silicon.
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let currentCharge = int("CurrentCapacity") ?? 0
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let isCharging = bool("IsCharging") ?? false
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let isPluggedIn = bool("ExternalConnected") ?? false
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let fullyCharged = bool("FullyCharged") ?? false
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let cycleCount = int("CycleCount")
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let designCapacity = int("DesignCapacity")
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// Raw (mAh) capacity is the meaningful "full charge capacity" on AS.
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let maxCapacity = int("AppleRawMaxCapacity") ?? int("MaxCapacity")
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let temperature = int("Temperature").map { Double($0) / 100.0 } // centi-°C
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let voltage = int("Voltage").map { Double($0) / 1000.0 } // mV → V
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let amperage = int("Amperage")
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let timeToEmpty = normalizedMinutes(int("AvgTimeToEmpty"), valid: !isPluggedIn)
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let timeToFull = normalizedMinutes(int("AvgTimeToFull"), valid: isCharging)
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let adapterWatts = (props["AdapterDetails"] as? [String: Any])?["Watts"] as? Int
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return PowerInfo(
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hasBattery: true,
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currentCharge: currentCharge,
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isCharging: isCharging,
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isPluggedIn: isPluggedIn,
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fullyCharged: fullyCharged,
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cycleCount: cycleCount,
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designCapacity: designCapacity,
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maxCapacity: maxCapacity,
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temperature: temperature,
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voltage: voltage,
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amperage: amperage,
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timeToEmpty: timeToEmpty,
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timeToFull: timeToFull,
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adapterWatts: adapterWatts
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)
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}
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/// AppleSmartBattery reports 65535 (or 0) for "still calculating"; treat as unknown.
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private func normalizedMinutes(_ value: Int?, valid: Bool) -> Int? {
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guard valid, let value, value > 0, value != 65535 else { return nil }
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return value
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}
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}
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