#!/bin/sh
#
# Register (or update) this judger in the web database.  Run it on the *host*,
# after `docker compose up`, whenever JUDGER_PASSWORD / JUDGER_SOCKET_* change.
#
#     ./judger/register-judger.sh
#     ./judger/register-judger.sh main_judger 'my-secret' uoj-judger
#
# It is an upsert, so it is safe to re-run.
#
# judger_name must equal JUDGER_NAME in the judger container (see
# docker-compose.yml); ip is what /judge/sync-judge-client dials, so for
# compose that is the service name `uoj-judger`.
set -eu

JUDGER_NAME="${1:-${JUDGER_NAME:-main_judger}}"
JUDGER_PASSWORD="${2:-${JUDGER_PASSWORD:-_judger_password_}}"
JUDGER_IP="${3:-${JUDGER_IP:-uoj-judger}}"

DB_CONTAINER="${DB_CONTAINER:-uoj-db}"
DB_NAME="${DATABASE_NAME:-app_uoj233}"
DB_USER="${DATABASE_USER:-root}"
DB_PASSWORD="${DATABASE_PASSWORD:-root}"

# Keep passwords free of single quotes: they are embedded in SQL below.
case "$JUDGER_NAME$JUDGER_PASSWORD$JUDGER_IP" in
    *"'"*)
        echo "ERROR: passwords/names must not contain a single quote" >&2
        exit 1
        ;;
esac

docker exec -i "$DB_CONTAINER" \
    mysql -u"$DB_USER" -p"$DB_PASSWORD" "$DB_NAME" <<SQL
insert into judger_info (judger_name, password, ip)
values ('$JUDGER_NAME', '$JUDGER_PASSWORD', '$JUDGER_IP')
on duplicate key update password = values(password), ip = values(ip);
select judger_name, ip from judger_info;
SQL