show dunst notifications on sound change

hyperland/default.nix

@@ -1,11 +1,34 @@
 { config, pkgs, username,  ... }:
+let
+  volumeChange = pkgs.writeShellScript "volume-change" ''
+    # FROM: https://github.com/jsimonrichard/nix-config/blob/master/modules/my-config/desktop/hyprland/home-manager/desktop/hyprland/keybinds.nix
 
+    # Arbitrary but unique message tag
+    msgTag="dunst-sound"
+
+    # Change the volume using alsa(might differ if you use pulseaudio)
+    wpctl $@ > /dev/null
+
+    # Query wpctl for the current volume and whether or not the speaker is muted
+    volume="$(wpctl get-volume $2 | awk '{print $2 * 100}')"
+    mute="$(wpctl get-volume $2 | awk '{print $3}')"
+    if [[ $volume == 0 || "$mute" == "[MUTED]" ]]; then
+      # Show the sound muted notification
+      dunstify -a "volumeChange" -u low -i audio-volume-muted -h string:x-dunst-stack-tag:$msgTag "Volume muted" 
+    else
+      # Show the volume notification
+      dunstify -a "volumeChange" -u low -i audio-volume-high -h string:x-dunst-stack-tag:$msgTag \
+      -h int:value:"$volume" "Volume: $volume%"
+    fi
+  '';
+in
 {
   home.packages = with pkgs; [
     dunst
     waybar
     swww
     rofi
+    brightnessctl
     # (pkgs.waybar.overrideAttrs (oldAttrs: {
     #   mesonFlags = oldAttrs.mesonFlags ++ [ "-Dexperimental=true" ];
     # }))
@@ -104,6 +127,8 @@
         "$mod, l, exec, hyprlock" # Add a keybinding to lock the screen
         "$mod, C, exec, codium"
         "$mod, E, exec, hyprctl dispatch exit"
+        ",XF86MonBrightnessDown, exec, brightnessctl s 5%-"
+        ",XF86MonBrightnessUp,   exec, brightnessctl s +5%"
       ]
       ++ (
         # workspaces
@@ -130,13 +155,15 @@
       # t -> transparent, cannot be shadowed by other binds.
       # i -> ignore mods, will ignore modifiers.
       binde = [
-        ", XF86AudioRaiseVolume, exec, wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%+ --limit 1.3"
+        ", XF86AudioRaiseVolume, exec, ${volumeChange} set-volume @DEFAULT_AUDIO_SINK@ 5%+ --limit 1.3"
+        "CTRL, XF86AudioRaiseVolume, exec, ${volumeChange} set-volume @DEFAULT_AUDIO_SOURCE@ 5%+ --limit 1"
       ];
       bindle = [
-        ", XF86AudioLowerVolume, exec, wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-"
+        ", XF86AudioLowerVolume, exec, ${volumeChange} set-volume @DEFAULT_AUDIO_SINK@ 5%-"
+        "CTRL, XF86AudioLowerVolume, exec, ${volumeChange} set-volume @DEFAULT_AUDIO_SOURCE@ 5%-"
       ];
       bindl = [
-        ", XF86AudioMute,        exec, wpctl set-mute   @DEFAULT_AUDIO_SINK@ toggle"
+        ", XF86AudioMute,        exec, ${volumeChange} set-mute   @DEFAULT_AUDIO_SINK@ toggle"
       ];
   };
 }