#!/bin/bash

###################################################################################
# Tryton Backup: attachments and database
#
# 1. Backup database and send to remote backups server throught rsync using
# ssh public/private key configuration.
# 2. Set X days to preserve db backups
# 3. Backup data folder of wordpress
# 4. Set X days to preserve wp backups dir
# 5. Get report statistics and send push message throught gotify
# self-hosted server (https://gotify.net/).
#
# Tools needed: pg_dump, gzip, rsync, rdiff-backup, curl
###################################################################################

PATH=$PATH:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

# variables push notifications
readonly GOTIFY_TOKEN="ABlynaRwExiItgY"
readonly GOTIFY_HOST="https://push.studi7.com"
readonly GOTIFY_PRIORITY=5
# backup db variables
readonly BACKUP_DB_FILE="pg-sqlbkp-"`date +\%Y\%m\%d`".sql.gz"
readonly BACKUP_DB_CONNECTION="postgresql://handycat:hand15zzycat@localhost:5432/handycat"
# backup data variables
readonly ATTACH_DIR="/home/raimon/attachments"
# remote settings
readonly REMOTE_SERVER="backups.studi7.com"
readonly REMOTE_PATH="/home/debian/backups/handycat"
readonly REMOTE_TRYTON_DB_FOLDER="tryton/db"
readonly REMOTE_TRYTON_DIR_FOLDER="tryton/attachments"
readonly BACKUP_PRESERVE_DAYS=30

# init notification message
MESSAGE="Backup task init: **"`date +"%d/%m/%Y %H:%M:%S"`"**  \r"

# dump postgreSQL
pg_dump --dbname=$BACKUP_DB_CONNECTION | gzip -9 > $BACKUP_DB_FILE
rsync -AaxzPh --remove-source-files $BACKUP_DB_FILE "$REMOTE_SERVER:$REMOTE_PATH/$REMOTE_TRYTON_DB_FOLDER"

# clear X days old remote db backups
ssh $REMOTE_SERVER 'bash -s' << EOF
find "$REMOTE_PATH/$REMOTE_WP_TRYTON_FOLDER" -maxdepth 1 -mtime +$BACKUP_PRESERVE_DAYS -print -exec "rm" -R {} \;
EOF

# rdiff-backup all dir of attachments
rdiff-backup $ATTACH_DIR "$REMOTE_SERVER::$REMOTE_PATH/$REMOTE_TRYTON_DIR_FOLDER"
# clear X days old increments of backup dir
rdiff-backup --remove-older-than "${BACKUP_PRESERVE_DAYS}D" "$REMOTE_SERVER::$REMOTE_PATH/$REMOTE_TRYTON_DIR_FOLDER"

MESSAGE="${MESSAGE} Backup task end: **"`date +"%d/%m/%Y %H:%M:%S"`"**  \r"

# send gotify notification
TITLE="Custom $(hostname) Backup"
EXTRAS="{\"client::display\": {\"contentType\": \"text/markdown\"}}"
curl -X POST "$GOTIFY_HOST/message?token=$GOTIFY_TOKEN" -H "accept: application/json" -H "Content-Type: application/json" \
  -d "{ \"message\": \"${MESSAGE}\", \"priority\": ${GOTIFY_PRIORITY}, \"title\": \"${TITLE}\", \"extras\": ${EXTRAS} }"