#!/bin/bash

## Sauvegarde distante via un Borg local puis rsync du repo##
# Auteur : Jaxom <jaxom@tchack.xyz>
# Credits to https://blog.andrewkeech.com/posts/170719_borg.html
# and https://jstaf.github.io/2018/03/12/backups-with-borg-rsync.html
# Repo initialement créé avec "borg init --encryption=repokey /var/backups/borgRepoRPi/"
# Exclure le repo du rsync quotidien via "RsyncExclusions.txt"

## Suivi ##
# 19-02-25 Ca marche mais ne backup que les fichiers YNH-auto, notamment sans les data Nextcloud.
# 19-05-14 Ajout etape Nextcloud suite a changement gestion Backup_core_only
# 19-07-07 Debug suite a verrouillage de mi-juin et absence de rsync distant.

#identifiants pour transmission des SMS via FreeMobile
user=""
pass=""

## AUTO Part ##
#From  @djib https://forum.yunohost.org/t/sauvegardes-automatiques-a-j-1-j-7-et-j-30/6495
#Modified by @jaxom on 2018-12-19
#Licenced under GPL. https://www.gnu.org/licenses/gpl.html

#GOAL: Creates a backup and removes some of the previous backups
#HOWTO: call it via cron as frequently as you want


# Backups are created with the following prefix
PREFIX="auto-"
# All backups with the previous prefix are deleted except the following dates
TODAY=`date '+%Y-%m-%d'`
LAST_WEEK=`date -d "7 days ago" '+%Y-%m-%d'`
BEGINNING_OF_MONTH=`date '+%Y-%m-01'`
BEGINNING_OF_LAST_MONTH=`date -d "last month" '+%Y-%m-01'`

#separation between apps, config and Nextcloud without data
export BACKUP_CORE_ONLY=0
yunohost backup create -n $PREFIX$TODAY-core --system
yunohost backup create -n $PREFIX$TODAY-apps --apps `yunohost app list -i | grep id| sed 's/id: //' | sed 's/nextcloud//' | tr -d '\n'`

#New management of data-only backups by Yunohost, see https://yunohost.org/#/backup_fr
export BACKUP_CORE_ONLY=1
yunohost backup create -n $PREFIX$TODAY-apps-NC --apps nextcloud

#Removal of old backups
cd /home/yunohost.backup/archives
rm `ls | grep $PREFIX | grep -v "$TODAY\|$LAST_WEEK\|$BEGINNING_OF_MONTH\|$BEGINNING_OF_LAST_MONTH"`

## BORG Part ##

# the envvar $REPONAME is something you should just hardcode
export REPOSITORY="/var/backups/borgRepoRPi"
# Fill in your password file here, borg picks it up automatically
#https://borgbackup.readthedocs.io/en/stable/faq.html#how-can-i-specify-the-encryption-passphrase-programmatically
#export BORG_PASSCOMMAND="cat /root/.borgRepoRpi.passphrase"
export BORG_PASSPHRASE=""

# Dossier à sauvegarder
DossierLocal=$REPOSITORY
#Dossier de sauvegarde sur le NAS
DossierDistant=/share/homes/Elias/

#Créer une sauvegarde
borg create $REPOSITORY::$TODAY /home/yunohost.backup/archives/auto-*

# Reset en cas d'erreur
if [ "$?" = "1" ] ; then
    export BORG_PASSPHRASE=""
    exit 1
fi

#Pruner le repo
borg prune -v --list --stats --keep-weekly=4 --keep-monthly=-1 $REPOSITORY >> /var/log/rsyncNasHerve/rsync-borg.log


#Transférer le repo actualisé
rsync -azPvH --delete-during --bwlimit=2.1m $DossierLocal admin@NASHerve:$DossierDistant >> /var/log/rsyncNasHerve/rsync-borg.log

#Confirmer par mail

#Confirmer par SMS
message="RPi borg "+`date +%Y-%m-%d_%H:%M:%S`
curl -s -i -k "https://smsapi.free-mobile.fr/sendmsg?user=$user&pass=$pass&msg=$message"

# Reset le password Borg
#export BORG_PASSCOMMAND=""
export BORG_PASSPHRASE=""
exit 0