#!/bin/bash

POSTGRES_USER=hackmd

error_msg="usage: $0 backup_path db_container uploads_volume"
backup_path="${1:?$error_msg}"
db_container="${2:?$error_msg}"
uploads_volume="${3:?$error_msg}"

backup_path="$(realpath "$backup_path")"
working_dir="/tmp/codimd-$(date +'%FT%H-%M-%S')"

mkdir -p "$working_dir"

echo "--- Extracting $backup_path to $working_dir..."
7zr x -o"$working_dir" "$backup_path"

echo "--- Restoring the database..."
cat "$working_dir/db.sql" | docker exec -i $db_container psql -U $POSTGRES_USER

echo "--- Restoring uploads..."
docker run --rm -v "$uploads_volume":/data \
                -v "$working_dir":/bkp alpine \
    tar xf /bkp/uploads.tar

rm -rf "$working_dir"