Add sb-battery to dwm

home/common/optional/desktop/dwm/default.nix

@@ -16,6 +16,7 @@
     ./scripts/sb-volume.nix
     ./scripts/sb-network-status.nix
     ./scripts/sb-updates.nix
+    ./scripts/sb-battery.nix
 
     # Notification scripts
     ./scripts/dunstify-volume-notification.nix

home/common/optional/desktop/dwm/scripts/sb-battery.nix

@@ -0,0 +1,37 @@
+{ pkgs, ... }:
+{
+  home.packages = with pkgs; [
+    (writeShellScriptBin "sb-cpu-pct" ''
+      BAT=/sys/class/power_supply/BAT0/capacity
+      
+      # Exit script if no battery detected
+      [ ! -f "$BAT" ] && exit
+      
+      STATUS=$(cat /sys/class/power_supply/BAT0/uevent | grep "POWER_SUPPLY_STATUS" | sed "s/^.*=//")
+      capacity=$(cat "$BAT")
+      
+      if [ "$STATUS" == "Charging" ] || [ "$STATUS" == "Not charging" ]; then
+        echo "[󰂄 $capacity%] "
+      else
+        case $capacity in
+          100) echo "[󰁹 $capacity%] ";;
+          9[0-9]) echo "[󰂂 $capacity%] ";;
+          8[0-9]) echo "[󰂁 $capacity%] ";;
+          7[0-9]) echo "[󰂀 $capacity%] ";;
+          6[0-9]) echo "[󰁿 $capacity%] ";;
+          5[0-9]) echo "[󰁾 $capacity%] ";;
+          4[0-9]) echo "[󰁽 $capacity%] ";;
+          3[0-9]) echo "[󰁼 $capacity%] ";;
+          2[0-9]) echo "[󰁻 $capacity%] ";;
+          1[0-9]) echo "[󰁺 $capacity%] ";;
+          [6-9]) echo "[󰁺 $capacity%] ";;
+          [0-5]) echo "[󰂃 $capacity%] ";;
+        esac
+      fi
+      
+      if [[ $capacity -le 20 && $STATUS != "Charging" ]]; then
+        dunstify-battery-notification
+      fi
+    '')
+  ];
+}