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#!/bin/sh
# Copyright (C) 2020  C. McEnroe <june@causal.agency>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

set -u

add=
force=
verbose=
host=$(git config notemap.imapServer)
port=$(git config notemap.imapServerPort)
user=$(git config notemap.imapUser)
pass=$(git config notemap.imapPass)
mailbox=$(git config notemap.imapMailbox)
path=$(git config notemap.mapFile)

OPTS_SPEC="\
git notemap [<options>] [<args>...]
--
M,mailbox=! mirror notes to mailbox
a,add! add new notes to map file
f,force! overwite modified notes in mailbox
h,host=! connect to IMAP on host
m,map-file=! set path to map file
p,port=! connect to IMAP on port
u,user=! log in to IMAP as user
v,verbose! log IMAP protocol to standard error
"
eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"

while [ $# -gt 0 ]; do
	opt=$1
	shift
	case "${opt}" in
		(-M) mailbox=$1; shift;;
		(-a) add=yes;;
		(-f) force=yes;;
		(-h) host=$1; shift;;
		(-m) path=$1; shift;;
		(-p) port=$1; shift;;
		(-u) user=$1; shift;;
		(-v) verbose=yes;;
		(--) break;;
	esac
done
if [ -z "${user}" ]; then
	echo "${0}: username required" >&2
	exit 1
fi

description() {
	cat <<-EOF
		protocol=imaps
		host=${host:-${user#*@}}
		username=${user%@*}
		${pass:+password=${pass}}
	EOF
}

if [ -z "${pass}" ]; then
	pass=$(description | git credential fill | grep '^password=')
	pass=${pass#*=}
fi

printf '%s' "${pass}" | notemap -w \
	${add:+-a} ${force:+-f} ${verbose:+-v} \
	${path:+-m "${path}"} \
	${host:+-h "${host}"} \
	${port:+-p "${port}"} \
	${mailbox:+-M "${mailbox}"} \
	"${user}" "$@"
status=$?
if [ $status -ne 78 ]; then
	description | git credential approve
else
	description | git credential reject
fi
exit $status