removed batsignal. Used a bash script for battery notifications

hosts/laptop/home.nix

@@ -37,7 +37,7 @@ home.stateVersion = "25.11"; # Please read the comment before changing.
 home.packages = [
 #scritps
 (pkgs.callPackage ../../modules/scripts/dontkillsteam.nix {})
-
+(pkgs.callPackage ../../modules/scripts/batterynotify.nix {})
 # # Adds the 'hello' command to your environment. It prints a friendly
 # # "Hello, world!" when run.
 # pkgs.hello

modules/scripts/batterynotify.nix

@@ -0,0 +1,72 @@
+{ writeShellApplication
+, libnotify
+, systemd
+}:
+
+writeShellApplication {
+  name = "custom-batterynotify";
+
+  runtimeInputs = [
+    libnotify   # provides notify-send
+    systemd     # provides systemctl
+  ];
+
+  text = ''
+    set -euo pipefail
+
+    LOW="''${BATTERY_LOW_THRESHOLD:-20}"
+    CRITICAL="''${BATTERY_CRITICAL_THRESHOLD:-5}"
+    FULL="''${BATTERY_FULL_THRESHOLD:-95}"
+    INTERVAL="''${BATTERY_INTERVAL:-30}"
+    ACTION="''${BATTERY_CRITICAL_ACTION:-systemctl suspend}"
+
+    notify() {
+      notify-send -a "Battery" -u "$1" "$2" "$3"
+    }
+
+    get_info() {
+      total=0
+      count=0
+
+      for bat in /sys/class/power_supply/BAT*; do
+        [ -f "$bat/capacity" ] || continue
+        capacity=$(<"$bat/capacity")
+        status=$(<"$bat/status")
+        total=$((total + capacity))
+        count=$((count + 1))
+      done
+
+      [ "$count" -gt 0 ] || exit 0
+      percentage=$((total / count))
+    }
+
+    last_state=""
+
+    while true; do
+      get_info
+      state="$status-$percentage"
+
+      if [[ "$status" == "Discharging" && "$percentage" -le "$CRITICAL" ]]; then
+        notify critical "Battery Critically Low" "$percentage% — suspending."
+        $ACTION
+
+      elif [[ "$status" == "Discharging" && "$percentage" -le "$LOW" ]]; then
+        if [[ "$last_state" != "low" ]]; then
+          notify normal "Battery Low" "$percentage% remaining."
+          last_state="low"
+        fi
+
+      elif [[ "$status" != "Discharging" && "$percentage" -ge "$FULL" ]]; then
+        if [[ "$last_state" != "full" ]]; then
+          notify normal "Battery Full" "$percentage% — unplug charger."
+          last_state="full"
+        fi
+
+      else
+        last_state=""
+      fi
+
+      sleep "$INTERVAL"
+    done
+  '';
+}