From 2cfc92bca1c09efd12684b6ea42d4c0df9faa3b7 Mon Sep 17 00:00:00 2001
From: Hadi <112569860+anotherhadi@users.noreply.github.com>
Date: Fri, 18 Apr 2025 10:18:21 +0200
Subject: [PATCH] change my keyboard backlight depending on the battery lvl

---
 home/system/hyprland/default.nix            |  1 +
 home/system/hyprland/keyboard-backlight.nix | 32 +++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 home/system/hyprland/keyboard-backlight.nix

diff --git a/home/system/hyprland/default.nix b/home/system/hyprland/default.nix
index ae66cbf..07bc2ca 100644
--- a/home/system/hyprland/default.nix
+++ b/home/system/hyprland/default.nix
@@ -16,6 +16,7 @@ in {
     ./animations.nix
     ./bindings.nix
     ./polkitagent.nix
+    ./keyboard-backlight.nix # CHANGEME: This is for my laptop only
     # FIXME: Broken on unstable
     # ./hyprspace.nix
   ];
diff --git a/home/system/hyprland/keyboard-backlight.nix b/home/system/hyprland/keyboard-backlight.nix
new file mode 100644
index 0000000..1014f01
--- /dev/null
+++ b/home/system/hyprland/keyboard-backlight.nix
@@ -0,0 +1,32 @@
+# Turn the keyboard red/off when the battery is low
+{ pkgs, config, ... }:
+let
+  keyboard-backlight = pkgs.writeShellScriptBin "keyboard-backlight" ''
+    function set_keyboard_backlight {
+      local color=$1
+        echo $color > /sys/devices/platform/hp-wmi/rgb_zones/zone00
+        echo $color > /sys/devices/platform/hp-wmi/rgb_zones/zone01
+        echo $color > /sys/devices/platform/hp-wmi/rgb_zones/zone02
+        echo $color > /sys/devices/platform/hp-wmi/rgb_zones/zone03
+    }
+    state="white"
+    while true; do
+      BATTERY_LEVEL=$(cat /sys/class/power_supply/BAT*/capacity)
+      if [[ $BATTERY_LEVEL -le 10 ]]; then
+        if [[ $state == "red" ]];then
+          state="white"
+          set_keyboard_backlight "000000"
+        else
+          state="red"
+          set_keyboard_backlight "FF0000"
+        fi
+      else
+        state="white"
+        set_keyboard_backlight ${config.lib.stylix.colors.base0D}
+      fi
+      sleep 2
+    done
+  '';
+in {
+  wayland.windowManager.hyprland.settings.exec-once = [ keyboard-backlight ];
+}