#!/bin/bash

# We setup kd as a server which runs profanity, because profanity
# contains important state which it does not save to disk: the most
# recent read message in each chat room and for private messages.
# To do this, uses data directories in /d/p.

# However, if we need to take kd down for maintenance, we can run
# profanity on HOST2 with data directory in /p. To do this, stop
# profanity, run prof-backup, and then systemctl start profanity from
# HOST2, and then run prof. To connect from other machines, run prof
# HOST2_SSH_NAME. To have the profanity service stopped and started with
# switch-mail-host, do touch /p/profanity-here. To do the reverse,
#
# systemctl stop profanity
# rsync /p/profanity{,-config} kdwg.b8.nz:/d/p
# ssh root@kdwg.b8.nz systemctl --now enable profanity

if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
source /a/bin/errhandle/err

source /a/bin/bash_unpublished/source-state
if [[ $HOSTNAME != "$HOST2" ]]; then
  exit 0
fi

case $HOSTNAME in
  kd)
    if systemctl --quiet is-active profanity; then
      rsync /d/p/profanity{,-config} /p
    fi
    ;;
  *)
    if ssh iank@b8.nz systemctl --user --quiet is-active profanity; then
      rsync -a b8.nz:/d/p/profanity{,-config} /p
    fi
    ;;
esac