Add vol utility

1 files changed, 109 insertions, 0 deletions

diff --git a/.local/bin/vol b/.local/bin/vol
new file mode 100755
index 0000000..9df37b6
--- /dev/null
+++ b/.local/bin/vol
@@ -0,0 +1,109 @@
+#!/bin/sh
+
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+
+main()
+{
+	# Handle opts
+	while getopts ":h" opt
+	do
+		case "$opt" in
+			h) usage && exit 0 ;;
+			*)
+				printf "Invalid option passed: %s\n" "$OPTARG" >&2
+				;;
+		esac
+	done
+
+	shift $(( OPTIND - 1 ))
+
+	[ $# -lt 1 ] && usage && exit 1
+
+	case "$1" in
+		inc)
+			amixer set Master ${2:-5}%+ > /dev/null
+			notify="Level increased to $(volume_level)%"
+			;;
+		dec)
+			amixer set Master ${2:-5}%- > /dev/null
+			notify="Level decreased to $(volume_level)%"
+			;;
+		set)
+			amixer set Master $2% > /dev/null
+			notify="Level set to $(volume_level)%"
+			;;
+		on)
+			amixer set Master on > /dev/null
+			notify="Unmuted at $(volume_level)%"
+			;;
+		off)
+			amixer set Master off > /dev/null
+			notify="Muted"
+			;;
+		toggle)
+			case "$(volume_state)" in
+				on) exec $0 off ;;
+				off) exec $0 on ;;
+			esac
+			;;
+	esac
+
+	notify-send -n 19269 -s -i "$(volume_icon)" "Volume" "$notify"
+}
+
+volume_level()
+{
+	amixer get Master | awk '/Left:/ { print $5 }' | head -n 1 | tr -d '[]%'
+}
+
+volume_state()
+{
+	amixer get Master | awk '/Left:/ { print $6 }' | head -n 1 | tr -d '[]'
+}
+
+volume_icon()
+{
+	[ "$(volume_state)" = "off" ] && printf "audio-volume-muted-panel" && return
+	[ $(volume_level) -lt  1 ] && printf "audio-volume-low-zero-panel" && return
+	[ $(volume_level) -lt 30 ] && printf "audio-volume-low-panel" && return
+	[ $(volume_level) -lt 70 ] && printf "audio-volume-medium-panel" && return
+
+	printf "audio-volume-high-panel"
+}
+
+usage()
+{
+	cat <<EOF
+Usage:
+	${0##*/} -h
+	${0##*/} inc [level]
+	${0##*/} dec [level]
+	${0##*/} set <level>
+	${0##*/} on
+	${0##*/} off
+	${0##*/} toggle
+
+Alter the current volume level or state, and add in a notification.
+
+Subcommands:
+	inc     Increase the volume by level, defaults to 5.
+	dec     Decrease the volume by level, defaults to 5.
+	set     Set the volume to level.
+	on      Unmute.
+	off     Mute.
+	toggle  Toggle between muted and unmuted state.
+
+Options:
+	-h  Show this help text and exit.
+EOF
+}
+
+main "$@"