LinuxGSM/lgsm/functions/update_minecraft_bedrock.sh

#!/bin/bash
# LinuxGSM update_minecraft_bedrock.sh module
# Author: Daniel Gibbs
# Contributors: http://linuxgsm.com/contrib
# Website: https://linuxgsm.com
# Description: Handles updating of Minecraft Bedrock servers.

functionselfname="$(basename "$(readlink -f "${BASH_SOURCE[0]}")")"

#random number for userAgent
randnum=$((1 + RANDOM % 5000))

fn_update_minecraft_dl() {
	fn_fetch_file "https://minecraft.azureedge.net/bin-linux/bedrock-server-${remotebuild}.zip" "" "" "" "${tmpdir}" "bedrock_server.${remotebuild}.zip"
	echo -e "Extracting to ${serverfiles}...\c"
	if [ "${firstcommandname}" == "INSTALL" ]; then
		unzip -oq "${tmpdir}/bedrock_server.${remotebuild}.zip" -x "server.properties" -d "${serverfiles}"
	else
		unzip -oq "${tmpdir}/bedrock_server.${remotebuild}.zip" -x "permissions.json" "server.properties" "allowlist.json" -d "${serverfiles}"
	fi
	local exitcode=$?
	if [ "${exitcode}" == "0" ]; then
		fn_print_ok_eol_nl
		fn_script_log_pass "Extracting to ${serverfiles}"
		chmod u+x "${serverfiles}/bedrock_server"
		fn_clear_tmp
	else
		fn_print_fail_eol_nl
		fn_script_log_fatal "Extracting to ${serverfiles}"
		fn_clear_tmp
		core_exit.sh
	fi
}

fn_update_minecraft_localbuild() {
	# Gets local build info.
	fn_print_dots "Checking local build: ${remotelocation}"
	# Uses log file to gather info.
	# Log is generated and cleared on startup but filled on shutdown.
	requirerestart=1
	localbuild=$(grep Version "${consolelogdir}"/* 2> /dev/null | tail -1 | sed 's/.*Version //')
	if [ -z "${localbuild}" ]; then
		fn_print_error "Checking local build: ${remotelocation}"
		fn_print_error_nl "Checking local build: ${remotelocation}: no log files containing version info"
		fn_print_info_nl "Checking local build: ${remotelocation}: forcing server restart"
		fn_script_log_error "No log files containing version info"
		fn_script_log_info "Forcing server restart"

		check_status.sh
		# If server stopped.
		if [ "${status}" == "0" ]; then
			exitbypass=1
			command_start.sh
			fn_firstcommand_reset
			sleep 3
			exitbypass=1
			command_stop.sh
			fn_firstcommand_reset
		# If server started.
		else
			exitbypass=1
			command_stop.sh
			fn_firstcommand_reset
		fi
	fi

	if [ -z "${localbuild}" ]; then
		localbuild=$(grep Version "$(ls -tr "${consolelogdir}"/* 2> /dev/null)" | tail -1 | sed 's/.*Version //')
	fi

	if [ -z "${localbuild}" ]; then
		localbuild="0"
		fn_print_error "Checking local build: ${remotelocation}: waiting for local build: missing local build info"
		fn_script_log_error "Missing local build info"
		fn_script_log_error "Set localbuild to 0"
	else
		fn_print_ok "Checking local build: ${remotelocation}"
		fn_script_log_pass "Checking local build"
	fi
}

fn_update_minecraft_remotebuild() {
	# Gets remote build info.
	if [ "${mcversion}" == "latest" ]; then
		remotebuild=$(curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -Ls -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.${randnum}.212 Safari/537.36" "https://www.minecraft.net/en-us/download/server/bedrock/" | grep -o 'https://minecraft.azureedge.net/bin-linux/[^"]*' | sed 's/.*\///' | grep -Eo "[.0-9]+[0-9]")
	else
		remotebuild="${mcversion}"
	fi

	if [ "${firstcommandname}" != "INSTALL" ]; then
		fn_print_dots "Checking remote build: ${remotelocation}"
		# Checks if remotebuild variable has been set.
		if [ -z "${remotebuild}" ] || [ "${remotebuild}" == "null" ]; then
			fn_print_fail "Checking remote build: ${remotelocation}"
			fn_script_log_fatal "Checking remote build"
			core_exit.sh
		else
			fn_print_ok "Checking remote build: ${remotelocation}"
			fn_script_log_pass "Checking remote build"
		fi
	else
		# Checks if remotebuild variable has been set.
		if [ -z "${remotebuild}" ] || [ "${remotebuild}" == "null" ]; then
			fn_print_failure "Unable to get remote build"
			fn_script_log_fatal "Unable to get remote build"
			core_exit.sh
		fi
	fi
}

fn_update_minecraft_compare() {
	# Removes dots so if statement can compare version numbers.
	fn_print_dots "Checking for update: ${remotelocation}"
	localbuilddigit=$(echo -e "${localbuild}" | tr -cd '[:digit:]')
	remotebuilddigit=$(echo -e "${remotebuild}" | tr -cd '[:digit:]')
	if [ "${localbuilddigit}" -ne "${remotebuilddigit}" ] || [ "${forceupdate}" == "1" ]; then
		fn_print_ok_nl "Checking for update: ${remotelocation}"
		echo -en "\n"
		echo -e "Update available"
		echo -e "* Local build: ${red}${localbuild}${default}"
		echo -e "* Remote build: ${green}${remotebuild}${default}"
		echo -en "\n"
		fn_script_log_info "Update available"
		fn_script_log_info "Local build: ${localbuild}"
		fn_script_log_info "Remote build: ${remotebuild}"
		fn_script_log_info "${localbuild} > ${remotebuild}"

		unset updateonstart
		check_status.sh
		# If server stopped.
		if [ "${status}" == "0" ]; then
			exitbypass=1
			fn_update_minecraft_dl
			if [ "${requirerestart}" == "1" ]; then
				exitbypass=1
				command_start.sh
				fn_firstcommand_reset
				exitbypass=1
				command_stop.sh
				fn_firstcommand_reset
			fi
		# If server started.
		else
			fn_print_restart_warning
			exitbypass=1
			command_stop.sh
			fn_firstcommand_reset
			exitbypass=1
			fn_update_minecraft_dl
			exitbypass=1
			command_start.sh
			fn_firstcommand_reset
		fi
		unset exitbypass
		date +%s > "${lockdir}/lastupdate.lock"
		alert="update"
		alert.sh
	else
		fn_print_ok_nl "Checking for update: ${remotelocation}"
		echo -en "\n"
		echo -e "No update available"
		echo -e "* Local build: ${green}${localbuild}${default}"
		echo -e "* Remote build: ${green}${remotebuild}${default}"
		echo -en "\n"
		fn_script_log_info "No update available"
		fn_script_log_info "Local build: ${localbuild}"
		fn_script_log_info "Remote build: ${remotebuild}"
	fi
}

# The location where the builds are checked and downloaded.
remotelocation="minecraft.net"

if [ "${firstcommandname}" == "INSTALL" ]; then
	fn_update_minecraft_remotebuild
	fn_update_minecraft_dl
else
	fn_print_dots "Checking for update"
	fn_print_dots "Checking for update: ${remotelocation}"
	fn_script_log_info "Checking for update: ${remotelocation}"
	fn_update_minecraft_localbuild
	fn_update_minecraft_remotebuild
	fn_update_minecraft_compare
fi