#!/bin/bash

# Modified from https://gist.github.com/ssddanbrown/8507ba236508ce5e362f1a7dc3b233cf

# Directory to store backups within
# Should not end with a slash and not be stored within
# the BookStack directory
BACKUP_ROOT_DIR="$HOME"

# Directory of the BookStack install
# Should not end with a slash.
BOOKSTACK_DIR="/var/www/bookstack"

# Enter BookStack dir
cd $BOOKSTACK_DIR || exit

# Check update
git fetch origin release -n
[ -n "$(git diff @ @{u})" ] || { echo "Up-to-date" && exit; }

# Get database options from BookStack .env file
export $(cat "$BOOKSTACK_DIR/.env" | grep ^DB_ | xargs)

# Create an export name and location
DATE=$(date "+%Y-%m-%d_%H-%M-%S")
BACKUP_NAME="bookstack_backup_$DATE"
BACKUP_DIR="$BACKUP_ROOT_DIR/$BACKUP_NAME"
mkdir -p "$BACKUP_DIR"

# Use loaded .env variables to create DB dump
mysqldump -u "$DB_USERNAME" -p"$DB_PASSWORD" "$DB_DATABASE" > "$BACKUP_DIR/database.sql"

# Create backup archive
tar -czpPf - "$BACKUP_DIR/database.sql" "$BOOKSTACK_DIR/.env" "$BOOKSTACK_DIR/storage/uploads" "$BOOKSTACK_DIR/public/uploads" "$BOOKSTACK_DIR/themes" \
  | gpg -e -r 0 > "$BACKUP_DIR.tar.gz.gpg"

# Cleanup non-archive directory
rm -r "$BACKUP_DIR"

# Upload archive
rclone copy "$BACKUP_DIR.tar.gz.gpg" od-1:/upload -vP
rm "$BACKUP_DIR.tar.gz.gpg"

# Run BookStack upgrade commands
git pull origin release
composer install --no-dev
php artisan migrate
php artisan cache:clear
php artisan view:clear