✨ feat(battery): add psutil fallback for battery info when UPower is unavailable

services/battery.py

@@ -1,5 +1,7 @@
 from fabric.core import Property, Service, Signal
 from pydbus import SystemBus
+import psutil
+from gi.repository import GLib
 
 DeviceState = {
     0: "UNKNOWN",
@@ -27,10 +29,16 @@ class Battery(Service):
 
     @Property(int, "readable")
     def percentage(self):
+        if self._use_psutil_fallback:
+            if self._psutil_battery:
+                return int(self._psutil_battery.percent)
+            return 0
         return int(self._battery.Percentage)
 
     @Property(str, "readable")
     def temperature(self):
+        if self._use_psutil_fallback:
+            return "N/A"  # psutil doesn't provide temperature
         return (
             f"{self._battery.Temperature}°C"
             if hasattr(self._battery, "Temperature")
@@ -39,33 +47,60 @@ class Battery(Service):
 
     @Property(str, "readable")
     def time_to_empty(self):
+        if self._use_psutil_fallback:
+            if self._psutil_battery and hasattr(self._psutil_battery, 'secsleft'):
+                return self.seconds_to_hours_minutes(self._psutil_battery.secsleft)
+            return "N/A"
         return self.seconds_to_hours_minutes(getattr(self._battery, "TimeToEmpty", 0))
 
     @Property(str, "readable")
     def time_to_full(self):
+        if self._use_psutil_fallback:
+            return "N/A"  # psutil doesn't provide time to full
         return self.seconds_to_hours_minutes(getattr(self._battery, "TimeToFull", 0))
 
     @Property(str, "readable")
     def icon_name(self):
+        if self._use_psutil_fallback:
+            return "battery"  # Generic icon name for psutil fallback
         return self._battery.IconName
 
     @Property(str, "readable")
     def state(self):
+        if self._use_psutil_fallback:
+            if self._psutil_battery:
+                # psutil returns power_plugged boolean, convert to state
+                if self._psutil_battery.power_plugged:
+                    if self._psutil_battery.percent >= 100:
+                        return "FULLY_CHARGED"
+                    else:
+                        return "CHARGING"
+                else:
+                    return "DISCHARGING"
+            return "UNKNOWN"
         return DeviceState.get(self._battery.State, "UNKNOWN")
 
     @Property(str, "readable")
     def capacity(self):
+        if self._use_psutil_fallback:
+            return "N/A"  # psutil doesn't provide capacity info
         return f"{int(self._battery.Capacity)}%"
 
     @Property(bool, "readable", default_value=False)
     def is_present(self):
+        if self._use_psutil_fallback:
+            return self._psutil_battery is not None
         return self._battery.IsPresent
 
     @Property(str, "readable")
     def power_profile(self):
-        return self._profile_proxy.ActiveProfile
+        if self._profile_proxy:
+            return self._profile_proxy.ActiveProfile
+        return None
 
     def set_power_profile(self, profile: str) -> bool:
+        if not self._profile_proxy:
+            return False
         if profile not in [p.Profile for p in self._profile_proxy.Profiles]:
             return False
         try:
@@ -79,6 +114,8 @@ class Battery(Service):
     def __init__(self):
         super().__init__()
         self._bus = SystemBus()
+        self._use_psutil_fallback = False
+        self._psutil_battery = None
 
         # Battery device
         try:
@@ -87,7 +124,16 @@ class Battery(Service):
             )
             self._battery.onPropertiesChanged = self.handle_battery_change
         except Exception:
-            return
+            # Fallback to psutil if UPower is not available
+            self._use_psutil_fallback = True
+            try:
+                self._psutil_battery = psutil.sensors_battery()
+                if self._psutil_battery is None:
+                    return  # No battery found
+                # Start periodic updates for psutil fallback
+                GLib.timeout_add_seconds(5, self._update_psutil_battery)
+            except Exception:
+                return  # psutil battery not available either
 
         # PowerProfiles
         try:
@@ -103,6 +149,15 @@ class Battery(Service):
 
         self.changed.emit()
 
+    def _update_psutil_battery(self):
+        """Update psutil battery data periodically"""
+        try:
+            self._psutil_battery = psutil.sensors_battery()
+            self.changed.emit()
+        except Exception:
+            pass  # Continue trying
+        return True  # Keep the timeout active
+
     def _handle_profile_props_changed(self, changed):
         """Internal handler for property changes that processes only the changed properties"""
         if "ActiveProfile" in changed: