#!/usr/bin/env bash
#
# write - output functions.
#
# Copyright 2019 Einhard Leichtfuß
#
# This file is part of rsync-backup.
#
# rsync-backup 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.
#
# rsync-backup 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.
#
# You should have received a copy of the GNU Affero General Public License
# along with rsync-backup.  If not, see <https://www.gnu.org/licenses/>.
#


# Write message, prefixed by either 'local' or the respective current host.
# Each argument is printed on its own line.
#
# requires: $host (unset or empty if running on localhost)
#
# $1: secondary prefix
# ${@:2}: messages: string+
#
function prefixed_write
{
	local prefix
	local msg

	test -n "$host" && prefix="${host}: "
	test -n "$1" && prefix+="${1}: "

	printf '%s%s\n' "$prefix" "$2"

	for msg in "${@:3}"
	do
		printf '%s%s\n' "${prefix//?/ }" "$msg"
	done
}

function message
{
	$verbose && prefixed_write '' "$@"
}

function debug
{
	$debug && prefixed_write "Debug" "$@"
}

function error
{
	prefixed_write "Error" "$@" 2>&1
}

function debug_error
{
	$debug && prefixed_write "Debug" "$@" 2>&1
}

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