#!/bin/bash

rm_ife() {
    if [[ -e "$1" ]]; then
        rm -r "$1"
    fi
}

# Check if server is started
status=$(systemctl show mcbe -p ActiveState --value)
if [[ $status != active ]]; then
    echo "mcbe.service is inactive. Exiting."
    exit 1
fi

# get time
hour=$(date +%H)
day=$(date +%d)
month=$(date +%m)
year=$(date +%Y)

# cd to backup dir
cd /vol/data/backup

# hourly backup
mcbe-exec say "Autosaving..."
rm_ife worlds-hourly-$hour
mcbe-backup worlds-hourly-$hour

# 10#$var construction is to force base-10 interpretation of variable
# because otherwise, numbers starting with 0 are interpreted as octal
if [[ 10#$hour -eq 1 ]]; then
    # if no players are present, restart the server
    # should help deal with any memory leaks or other bugs
    players=""
    while [[ -z $players ]]; do
        players=$(mcbe-exec list | head -n 1 | cut -d ' ' -f 3 | cut -d '/' -f 1)
    done
    if [[ $players -eq 0 ]]; then
	mcbe-restart
    fi

    # save daily and longterm backups
    rm_ife worlds-daily-$day
    mv worlds-hourly-$hour worlds-daily-$day
    if [[ 10#$day -eq 1 ]]; then
	mv worlds-daily-$day worlds-$year-$month-$day
    fi
fi