#!/bin/bash

# This script performs a backup of key data in the Docker Compose Alfresco
# environment that is started using the companion `docker-compose.yml`
# file.  It backs up the binary data and database.  It ignores the search
# engine and MQ server.  This is not proper for a production environment.

# Notice that we are not compressing any of this backup.  We are counting on
# Git's ability to only deal with differences to get far better effective
# compression over of the data as it is verioned.  Git also compresses these
# files in transit and in storage anyway.  By not putting them in ZIP files, we
# use just as little disk space with one commit and probably 90% smaller over
# 10 commits and 99% smaller over 100 commits.

prepare() {
	echo "Preparing for the backup ..."

	export THISDIR=`dirname "$(readlink -f "$0")"`
	export DOCKER_COMPOSE_DIR=$THISDIR
	export DATA_DIR=$DOCKER_COMPOSE_DIR/data

	source "$THISDIR/common.sh"

	echo "Clearing previous backup (if one exists) ..."
	sudo rm -rf "$DATA_DIR"
	mkdir -p "$DATA_DIR"
}

backup() {
	echo "Performing a backup ..."
}

backup_database() {
	CONTAINER_ID=$1
	SQL_SCHEMA_FILENAME=$2
	SQL_DATA_FILENAME=$3
	DB_NAME=$4
	DB_USERNAME=$5
	DB_DISPLAY=$6
	
	echo "Backing up the $DB_DISPLAY database ..."

	echo "Dumping $DB_DISPLAY database schema ..."
	docker container exec $CONTAINER_ID pg_dump -U $DB_USERNAME -s -f /tmp/$SQL_SCHEMA_FILENAME $DB_NAME

	echo "Dumping $DB_DISPLAY database data ..."
	docker container exec $CONTAINER_ID pg_dump -U $DB_USERNAME -a -f /tmp/$SQL_DATA_FILENAME $DB_NAME

	echo "Copying $DB_DISPLAY database schema from Docker container ..."
	docker cp $CONTAINER_ID:/tmp/$SQL_SCHEMA_FILENAME "${DOCKER_COMPOSE_DIR}/data"

	echo "Copying $DB_DISPLAY database data from Docker container ..."
	docker cp $CONTAINER_ID:/tmp/$SQL_DATA_FILENAME "${DOCKER_COMPOSE_DIR}/data"
}

backup_binaryData() {
	CONTAINER_ID=$1
	DATA_DIRECTORY=$2
	CONTAINER_PATH=$3
	DISPLAY=$4

	echo "Backing up the $DISPLAY binary data ..."

	echo "Copying $DISPLAY binary data ..."
	docker cp -a "$CONTAINER_ID:$CONTAINER_PATH/$DATA_DIRECTORY" "${DOCKER_COMPOSE_DIR}/data"
}

prepare
backup