bin: move function from volume to helpers, add notifications to brightness

bin/sway_brightness

@@ -1,7 +1,11 @@
 #!/bin/bash
 source $HOME/.config/sway/bin/sway_helpers
 DEVICE=sysfs/backlight/intel_backlight
-APP=light
+NOTIFY_APP="dunstify -a brightness -h string:x-dunst-stack-tag:brightness"
+ICON=$HOME/.local/share/icons/Tela-circle-dark/16/panel/xfpm-brightness-lcd.svg
+APP="/usr/bin/light -s $DEVICE"
+PRG1="●"
+PRG2="◌"
 
 ## main
 _log BRIGHTNESS INFO args: $*
@@ -9,13 +13,20 @@ _check_app $APP
 
 case $1 in
   d*)
-    light -s $DEVICE -U 10
+    $APP -U 10
+    BR=$($APP)
+    $NOTIFY_APP -i $ICON "$BR" "$(getProgressString 10 "$PRG1" "$PRG2" $BR)"
     ;;
   i*)
-    light -s $DEVICE -A 10
+    $APP -A 10
+    BR=$($APP)
+    $NOTIFY_APP -i $ICON "$BR" "$(getProgressString 10 "$PRG1" "$PRG2" $BR)"
     ;;
-  *)
-    echo "invalid argument: \"$1\""
+  "-h"|"--help")
     echo "arguments: [decrease|increase]"
     ;;
+  *)
+    BR=$($APP)
+    $NOTIFY_APP -i $ICON "$BR" "$(getProgressString 10 "$PRG1" "$PRG2" $BR)"
+    ;;
 esac