#!/bin/sh -efu

. shell-error
. shell-getopt

avahi_service_dir=/etc/avahi/services

#usage: publish_service [options] file name service-type port [TXT data ...]
#looks like avahi-publish-service utility
publish_service()
{
    [ -d "$avahi_service_dir" ] || return

    ## read optional args

    local temp=`getopt -n $PROG -o "s:" -l "subtype:" -- "$@"` ||
	fatal "usage: publish_service [options] file name service-type port [TXT data ...]"
    eval set -- "$temp"

    local subtype=
    while :; do
	case "$1" in
		-s|--subtype) subtype="$2";shift ;;
		--) shift; break ;;
	esac
	shift
    done

    ## read args
    local file="$1";shift
    local name="$1";shift
    local type="$1";shift
    local port="$1";shift

    ## write  service definition file and reload avahi
    local f="$avahi_service_dir/$file.service"

    cat>"$f"<<EOF
<?xml version="1.0" standalone="no"?>
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
    <name replace-wildcards="yes">$name</name>
    <service>
	<type>$type</type>
	<port>$port</port>
	$([ -z "$subtype" ] || echo "<subtype>$subtype</subtype>")
	$( while [ $# -gt 0 ]; do echo -n "<txt-record>$1</txt-record>"; shift; done)
    </service>
</service-group>
EOF
}

unpublish_service()
{
    [ -d "$avahi_service_dir" ] || return

    local f="$avahi_service_dir/$1.service"

    [ -f "$f" ] && rm -f "$f"
}