jingle_round_robin

#!/bin/sh -eu
#
# This script is run every 10 minutes

musicdir=/home/broadcast/instanssi-musiikki
jingles=/home/broadcast/jingles.txt
ctrfile=/tmp/jingle-counter

insert () {
    mpc insert "jingles/$1"
}

parse_line () {
    read -r type args || return 1
    case $type in
	audio)
	    echo "Inserting $args"
	    insert "$args"
	    ;;
	voice)
	    echo "$args" | {
		read -r lang msg
		espeak-ng -w $musicdir/jingles/espeak.wav -v $lang -p 55 -s 200 "$msg"
		echo "Inserting speech, lang: $lang, message: $msg"
		insert espeak.wav
	    }
	    ;;
	*)
	    echo FATAL ERROR INVALID COMMAND $type
	    ;;
    esac
}

get_next () {
    grep '^[^#]' $jingles | sed "$1q;d" | parse_line
}

# Do not insert jingle if there's already one in the queue
if mpc playlist -f %file% | grep -q ^jingles/; then
    echo Jingle already queued. Long piece or live underway.
    exit 0
fi

# Manual insertion
if test $# -ge 1; then
    echo "$@" | parse_line
else
    test -e "$ctrfile" && ctr=`cat $ctrfile` || ctr=1
    get_next $ctr || {
	ctr=1
	get_next $ctr
    }
    echo $(( $ctr + 1 )) >$ctrfile
fi