#!/usr/bin/env bash

## Variables ##

if [[ -z "$HOSTNAME" ]]; then
	echo "*** Pulling Hostname From Command ***"
	export HOSTNAME="`hostname`"
fi
if [[ -z "$HOSTNAME" ]]; then
	echo "*** Pulling Hostname From /etc/ File ***"
	export HOSTNAME="`cat /etc/hostname`"
fi

EXTRA="$1"
TAG="System"
DATE="`date "+%Y%m%d-%H%M%S"`"
BACKUP_DIR="/srv/backup"
BASENAME="Backup"
BACKUP="$BACKUP_DIR/$BASENAME.$DATE.$HOSTNAME.$TAG.zip"

## Initialization ##

echo "*** Creating Backup Directory ***"
sudo mkdir -pv "$BACKUP_DIR"
sudo mkdir -pv "$BACKUP_DIR/TRASH"
sudo chmod -Rv 775 "$BACKUP_DIR"
sudo chown -Rv root:root "$BACKUP_DIR"

## Cleanup ##

echo "*** Removing Old Backups ***"
cd "$BACKUP_DIR"
sudo mv -v "$BASENAME"*"$TAG"* TRASH/
sudo rm -v TRASH/*

## Main

echo "*** Creating backup at '$BACKUP' ***"
sudo zip -rv "$BACKUP" \
	/etc /var/{log,mail,spool} /srv /boot \
	/usr/local/etc $EXTRA \
	-x /srv/backup
status="$?"

if [[ "$status" != 0 ]]; then
	echo "*** ERROR: Failed to create '$BACKUP', file may be incorrect. ***"
fi

if [[ -e "$BACKUP" ]]; then
	ls -alh "$BACKUP"
	echo "*** '$BACKUP' created successfully! ***"s
else
	echo "*** '$BACKUP' not found! ***"
	exit 1
fi

exit 0