#!/bin/sh

# Copyright (c) 2022 Emma Tebibyte
# SPDX-License-Identifier: AGPL-3.0-or-later

# Protonkey 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.
# 
# Protonkey 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 this program. If not, see https://www.gnu.org/licenses/.

if ! test -n "$1"; then
	printf "Usage: %s [ProtonMail address]\n" "$0" 1>&2
	exit 64 # syexits(3) EX_USAGE
fi

for command in \
	curl \
	gpg
do
	if ! command -v "$command" > /dev/null; then
		printf "%s: Missing dependency: %s(1)\n" "$0" "$command" 1>&2
		exit 69 # sysexits(3) EX_UNAVAILABLE
	fi
done

URL="https://api.protonmail.ch/pks/lookup?op=get&search=$1"
RESPONSE="$(curl -s "$URL")"

if ! printf "%s\n" "$RESPONSE" | gpg --import >/dev/null 2>&1; then
	printf "%s\n" "$RESPONSE" 1>&2
	exit 76 # sysexits(3) EX_PROTOCOL
else
	exit 0
fi