#! /bin/bash
#
# tmodloader-nightly.sh
# Backup script for tModLoader. Meant to be sourced by our main backup script
# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
#
# Distributed under terms of the MIT license.
#

set -e

export TERRARIADIR="{{ terraria_root }}/{{ terraria_name }}"
export OUTDIR="$BACKUPSDIR/tmodloader/{{ terraria_name }}"
retention=5 # 5-day retention period

# Sanity checks
if [ -z "$BACKUPSDIR" ]; then
	log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
	return 1
fi
if ! [ -d "$OUTDIR" ]; then
	if ! mkdir -p "$OUTDIR"; then
		log "Unable to find or create output directory: $OUTDIR"
		return 2
	fi
fi
# Enforce permissions on our output directory
chown terraria.ter-admin "$OUTDIR"
chmod 770 "$OUTDIR"

# Purge oldest backup if we need to
currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
# Multiplying by three here because our backups are three-parters
if (( currentbackupcount >= retention * 3 )); then
	find "$OUTDIR"/ -iname "*.tar.gz" -mtime +30 -delete
fi
# WE MAKE BACKUP NOW SERGEI
if cd "$TERRARIADIR"; then
{% if aws.backup_bucket is defined %}
	log "Initiating full tmodloader backup"
	tar czh --exclude="$TERRARIADIR/backups" "$TERRARIADIR" | aws s3 cp - "s3://{{ aws.backup_bucket }}/tmodloader/{{ terraria_name }}/full-$date-server.tar.gz" --storage-class STANDARD
	log "Backing up mod configuration"
	tar czh "{{ terraria_root }}/.local/share/Terraria/ModLoader" | aws s3 cp - "s3://{{ aws.backup_bucket }}/tmodloader/{{ terraria_name }}/full-$date-mods.tar.gz" --storage-class STANDARD
{% endif %}
else
	log "Could not change directory: $TERRARIADIR"
	return 3
fi