#!/bin/sh

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

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

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

if [ "$RESPONSE" = "No key found" ]; then
	printf "%s\n" "RESPONSE"
	exit 76 # sysexits(3) EX_PROTOCOL
else
	TEMPKEY=$(mktemp /tmp/pubkey-dl.XXXXXX)
	printf "%s" "$RESPONSE" > "$TEMPKEY"
fi

gpg --import "$TEMPKEY"

exit 0