config

commit 164daa6df7575bfb74b0a89f7b4e39db3812c455
parent ecfb2bf6258ab48eec31c35a5494fe5e175b7d2c
Author: Jacob R. Edwards <jacobouno@protonmail.com>
Date:   Thu, 10 Sep 2020 12:31:31 -0700

Refactor using functions

Diffstat:
M
scripts/.local/bin/mps
 | 
44
+++++++++++++++++++++-----------------------

1 file changed, 21 insertions(+), 23 deletions(-)
diff --git a/scripts/.local/bin/mps b/scripts/.local/bin/mps
@@ -3,29 +3,27 @@
 
 set -eu
 
+usage() { echo "usage: `basename $0` [-ls]" ;}
+err() { echo "`basename $0`: $@" 1>&2 ;}
+
+# save(file)
+save() {
+	local file="`mpc current -f "%file%" | tr '\n' ',' > "$1"`"
+	local time=`mpc status | awk -F"[ /]+" 'FNR == 2 { print $4; exit }'`
+	echo "${file}${time}" > "$1"
+}
+
+# load(file)
+load() {
+	state="`cat "$1"`"
+	local file=`echo $state | cut -d, -f1`
+	local time=`echo $state | cut -d, -f2-`
+	mpc -q insert "$file" && mpc -q next && mpc -q seek "$time"
+}
+
 case "${1:-"-s"}"
 in
-	-s)
-		file=${2:-"-"}
-		[ "$file" = "-" ] && file="/dev/stdout"
-		mpc current -f "%file%" | tr '\n' ',' > "$file"
-		mpc status | egrep -o "[0-9]+:[0-9]+/[0-9]+:[0-9]+" | cut -d"/" -f1 >> "$file";;
-	-l)
-		if [ $# -lt 2 ]; then
-			echo "No input specified." 1>&2
-			exit 1
-		elif [ ! -f "$2" ]; then
-			echo "File does not exist." 1>&2
-			exit 1
-		else
-			file="$2"
-			track="$(cut -d"," -f1 "$file")"
-			# if time is invalid unhandled error ocours due to mpc next
-			mpc -q insert "${track:?track does not exist}" && mpc -q next
-			mpc -q seek `cut -d"," -f2 "$file"`
-		fi;;
-	*)
-		echo "usage, `basename $0` [-sl]"
-		echo "\t-s, save state to file ('-' for stdout)"
-		echo "\t-l, load state from file";;
+	-s) save "${2:-"/dev/stdout"}";;
+	-l) load "${2:-"/dev/stdin"}";;
+	*) usage; exit 1;;
 esac