#!/bin/bash
set -eu

BACKUP=({{ backup_dirs|join(' ') }} {{ backup_dirs_extra|join(' ') }})
OPTIONS=({{ backup_opts }} {{ backup_opts_extra }})

export BORG_REPO="{{ backup_repo }}"
export BORG_PASSCOMMAND="cat {{ borg_pwd_file }}"
KEY_BACKUP="{{ borg_key_backup }}"

MOUNTED=""

MNT="$(echo "$BORG_REPO" | sed "s|\(^.*/mnt\).*|\1|")"
if grep -q "$MNT" /etc/fstab ; then
    [ -d "$BORG_REPO" ] || mount -v "$MNT" && MOUNTED="TRUE"
fi

if [ ! -e "$KEY_BACKUP" ] ; then
    [[ "$BORG_REPO" =~ @ ]] || mkdir -vp --mode=0750 "$BORG_REPO"
    borg init --encryption=repokey
    borg key export "$BORG_REPO" "$KEY_BACKUP"
fi

if [ -e "{{ nc_dir }}/config/config.php" ] ; then
    NCDB="{{ data_dir }}/nextcloud-database.dump"
    sudo -u www-data /usr/bin/php {{ nc_dir }}/occ maintenance:mode --on
    PW="$(grep dbpassword {{ nc_dir }}/config/config.php | \
                   sed -e "s/\W*'dbpassword' => '//" -e "s/',$//")"

    echo -n "Dumping data base into '$NCDB' … "
    mysqldump --single-transaction -h localhost -u nextcloud -p"$PW" nextcloud > "$NCDB"
    chmod 600 "$NCDB"
    echo  "done."
fi

echo "Backup ${BACKUP[@]} to $BORG_REPO."
borg create -v --show-rc "${OPTIONS[@]}" ::'{hostname}-{now}' "${BACKUP[@]}"

borg prune -v --list --prefix='{hostname}-' --show-rc \
     --keep-daily   14 \
     --keep-weekly   8 \
     --keep-monthly  6 \
     --keep-yearly  10

if [ -e "{{ nc_dir }}/config/config.php" ] ; then
    sudo -u www-data /usr/bin/php {{ nc_dir }}/occ maintenance:mode --off
fi

if [ "$MOUNTED" = "TRUE" ] ; then
    umount -v "$MNT"
fi