#!/bin/sh
#
# 2013-2019 ungleich glarus ag (cdist at ungleich.ch)
#
# This file is part of cdist.
#
# cdist 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.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#

user="$(cat "$__object/parameter/user")"

os=$(cat $__global/explorer/os)
osversion=$(cat "$__global/explorer/os_version")

case "$os" in
    debian|devuan)
        postgres_lib=libpq-dev

        case $osversion in
            6*)
                postgres_version=8.4
            ;;
            7*)
                postgres_version=9.1
            ;;
            8*)
                postgres_version=9.4
            ;;
            9*|ascii/ceres|ascii)
                postgres_version=9.6
            ;;
            10*|11*|beowulf/ceres|beowulf)
                postgres_version=11
            ;;
            *)
                echo "Unsupported OS Version: $osversion" >&2
                exit 1
            ;;
        esac

        # Allow version override
        if [ -f "$__object/parameter/version" ]; then
            postgres_version=$(cat "$__object/parameter/version")
        fi

        postgres_server="postgresql-${postgres_version}"

    ;;
    alpine)
        postgres_lib="postgresql-dev"
        postgres_server="postgresql"
    ;;
    *)
        echo "Unsupported OS: $os" >&2
        exit 1
    ;;
esac

__package "$postgres_server" --state present
__package "$postgres_lib" --state present

require="__package/$postgres_server __package/$postgres_lib" __process postgres --start "service postgresql start"

################################################################################
# Configure PostgreSQL
#
require="__process/postgres" __postgres_role "$user" \
    --state present --login --createdb --superuser

require="__postgres_role/$user" __postgres_database \
        "$user" --state present --owner "$user"

require="__package/$postgres_server" __start_on_boot postgresql

################################################################################
# Create backups
#

if [ ! -f "$__object/parameter/no-backup" ]; then
  require="__package/$postgres_server" __directory /var/backups/postgres \
      --owner postgres --group postgres --parents

  require="__package/$postgres_server __directory/var/backups/postgres" __cron \
      pg_dumpall_under_day \
      --user postgres \
      --hour 8,9,10,11,12,14,15,16,17,18 --minute 0 \
      --command 'nice pg_dumpall -U postgres | gzip > /var/backups/postgres/dumpall-$(date +\%H\%M).sql.gz'

  require="__package/$postgres_server __directory/var/backups/postgres" __cron \
      pg_dumpall_archive \
      --user postgres \
      --hour 2 --minute 0 \
      --command 'nice pg_dumpall -U postgres | gzip > /var/backups/postgres/dumpall-$(date +\%Y\%m\%d-\%H\%M).sql.gz'

  # Delete local backups after 7 days
  require="__package/$postgres_server __directory/var/backups/postgres" __cron \
      pg_dump_cleanup \
      --user postgres \
      --hour 1 --minute 0 \
      --command 'find /var/backups/postgres -type f -mtime +7 -delete'
fi