Update brightness script to proper standard

.config/polybar/modules

@@ -56,7 +56,7 @@ label-muted =  %percentage%%
 type = internal/backlight
 card = intel_backlight
 
-format = %{A3:$HOME/.scripts/brightnesscontrol.sh s 30:}%{A4:$HOME/.scripts/brightnesscontrol.sh u 10:}%{A5:$HOME/.scripts/brightnesscontrol.sh d 10:}<ramp> <label>%{A}%{A}%{A}
+format = %{A3:$HOME/.scripts/brictl.sh s 30:}%{A4:$HOME/.scripts/brictl.sh i 10:}%{A5:$HOME/.scripts/brictl.sh d 10:}<ramp> <label>%{A}%{A}%{A}
 format-foreground = ${colors.white-bright}
 
 ramp-0 = %{T3}%{T-}

.config/sxhkd/sxhkdrc

@@ -34,7 +34,7 @@ super + shift + w
 
 # Screen brightness
 super + {F2,F3}
-	brightnesscontrol.sh {down,up} 10
+	brictl.sh {dec,inc} 10
 
 # Screenshot (fullscreen, selection, focused window)
 {_,shift,super} + @Print

.scripts/brictl.sh

@@ -0,0 +1,85 @@
+#!/bin/sh
+
+# Control the display brightness
+# Depends: brightnessctl
+
+help() {
+	B=$(tput bold)
+	U=$(tput smul)
+	N=$(tput sgr0)
+
+	cat << EOF
+${B}NAME${N}
+	brictl.sh - control the display brightness
+
+${B}SYNOPSIS${N}
+	${B}brictl.sh${N} [${U}OPTION${N}] [${U}COMMAND${N}] [<${U}ARG${N}>]
+
+${B}DESCRIPTION${N}
+	${B}brictl.sh${N} uses brightnessctl to change the brightness of the system.
+
+	Commands can be truncated, i.e. "${B}brictl.sh s${N}" for "${B}brictl.sh set${N}"
+	Arguments need to be of numeric value.
+
+${B}OPTIONS${N}
+	${B}-h${N}	Display usage message and exit.
+
+${B}COMMANDS${N}
+	${B}i${N} <${U}AMOUNT${N}>, ${B}inc${N} <${U}AMOUNT${N}>
+		Increase brightness by ${U}AMOUNT${N}, default of 5.
+
+	${B}d${N} <${U}AMOUNT${N}>, ${B}dec${N} <${U}AMOUNT${N}>
+		Decrease brightness by ${U}AMOUNT${N}, default of 5.
+
+	${B}s${N} <${U}LEVEL${N}>, ${B}set${N} <${U}LEVEL${N}>
+		Set brightness to ${U}LEVEL${N}, default of 30.
+
+	${B}g${N}, ${B}get${N}
+		Get brightness level.
+EOF
+}
+
+# Exit if no option is provided
+[ "$#" -eq 0 ] && help && exit 1
+
+SCRIPT="$(basename "$0")"
+
+# Option handling
+while getopts ':h?' opt; do
+	case $opt in
+		h)
+			help
+			exit 0
+			;;
+		\?)
+			echo "$SCRIPT: invalid option '$OPTARG'"
+			echo "Try '$SCRIPT -h' for more information."
+			exit 1
+			;;
+	esac
+done
+
+# Command handling
+shift $((OPTIND - 1))
+case "$1" in
+	i*)
+		NUM=${2:-5}
+		brightnessctl -q s +"$NUM"%
+		;;
+	d*)
+		NUM=${2:-5}
+		brightnessctl -q s "$NUM"%-
+		;;
+	s*)
+		NUM=${2:-30}
+		brightnessctl -q s "$NUM"%
+		;;
+	g*)
+		brightnessctl | awk '/%/ {print substr($4, 2, length($4) - 3)}'
+		;;
+	*)
+		echo "$SCRIPT: invalid command '$1'"
+		echo "Try '$SCRIPT -h' for more information."
+		exit 1
+		;;
+esac

.scripts/brightnesscontrol.sh

@@ -1,43 +0,0 @@
-#!/bin/sh
-
-# General brightness management
-
-RELOAD="$HOME/.scripts/panel/brightness.sh"
-
-[ -z "$2" ] && NUM="5" || NUM="$2"
-
-help() {
-	B=$(tput bold)
-	N=$(tput sgr0)
-
-	cat << EOF
-${B}NAME${N}
-	brightnesscontrol - control the volume of the system
-
-${B}SYNOPSIS${N}
-	./brightnesscontrol.sh <command> [<arg1>]
-
-${B}DESCRIPTION${N}
-	Commands can be truncated, i.e.
-	\`${B}brightnesscontrol.sh s${N}\` for \`${B}brightnesscontrol.sh set${N}\`
-
-	Arguments need to be of numeric value.
-
-${B}COMMANDS${N}
-	${B}u*, up <amount>${N}
-
-	${B}d*, down <amount>${N}
-
-	${B}s*, set <volume>${N}
-
-	${B}g*, getbrightness${N}
-EOF
-}
-
-case "$1" in
-	u*) brightnessctl -q s +"$NUM"% ; $RELOAD ;;
-	d*) brightnessctl -q s "$NUM"%- ; $RELOAD ;;
-	s*) brightnessctl -q s "$NUM"% ; $RELOAD ;;
-	g*) brightnessctl | awk '/%/ {print substr($4, 2, length($4) - 3)}' ;;
-	*)  help ;;
-esac