#!/usr/bin/env bash

### CONSTANTS

SYMPA_CONF=/etc/sympa/sympa/sympa.conf
SYMPA_DOMAIN=$(grep '^domain' "$SYMPA_CONF" | cut -f2)

### FUNCTIONS

function create_temp_dir {
	temp_name="$SYMPA_DOMAIN-$(date '+%F')"
    temp_dir="/tmp/$temp_name"
    mkdir "$temp_dir"
}

function export_database {
    db_name=sympa
    db_user=sympa
    db_passwd=$(grep '^db_passwd' /etc/sympa/sympa/sympa.conf | cut -f2)
    PGPASSWORD=$db_passwd pg_dump -h localhost -U "$db_user" "$db_name" | gzip >"$temp_dir/database.psql.gz"
}

function export_files {
    tar -C / -cf "$temp_dir/files.tar" etc/sympa/sympa/sympa.conf
    tar -C / -uf "$temp_dir/files.tar" etc/sympa/data_structure.version
    tar -C / -uf "$temp_dir/files.tar" etc/sympa/auth.conf
    
    tar -C / -uf "$temp_dir/files.tar" var/lib/sympa
    tar -C / -uf "$temp_dir/files.tar" var/spool/sympa

    tar -C / -uf "$temp_dir/files.tar" etc/postfix/main.cf
    tar -C / -uf "$temp_dir/files.tar" etc/dkimkeys/mail.private
    tar -C / -uf "$temp_dir/files.tar" etc/letsencrypt

    gzip "$temp_dir/files.tar"
}

function export {
    create_temp_dir
    export_database
    export_files
    tar -C $temp_dir -cf "$temp_name.sympa" .
    rm "$temp_dir" -rf
}

### MAIN

# execute as root or use `sudo`
[[ $(id -u) != 0 ]] && exec sudo $(dirname "$0")/$(basename "$0")

set -Eeu
export