#!/bin/bash
### Copyright 1999-2026. WebPros International GmbH. All rights reserved.

[ -z "$PLESK_INSTALLER_DEBUG" ] || set -x
[ -z "$PLESK_INSTALLER_STRICT_MODE" ] || set -e

export LC_ALL=C
unset GREP_OPTIONS

RET_SUCCESS=0
RET_WARN=1
RET_FATAL=2

is_function_defined()
{
	local fn="$1"
	case "$(type $fn 2>/dev/null)" in
	*function*)
		return 0
		;;
	esac
	return 1
}

# @params are tags in format "key=value"
# Report body (human readable information) is read from stdin
# and copied to stderr.
make_error_report()
{
	local report_file="${PLESK_INSTALLER_ERROR_REPORT:-}"

	local python_bin=
	for bin in "/opt/psa/bin/python" "/usr/local/psa/bin/python" "/usr/bin/python2" "/opt/psa/bin/py3-python" "/usr/local/psa/bin/py3-python" "/usr/libexec/platform-python" "/usr/bin/python3"; do
		if [ -x "$bin" ]; then
			python_bin="$bin"
			break
		fi
	done

	if [ -n "$report_file" -a -x "$python_bin" ]; then
		"$python_bin" -c 'import sys, json
report_file = sys.argv[1]
error = sys.stdin.read()

sys.stderr.write(error)

data = {
	"error": error,
}

for tag in sys.argv[2:]:
	k, v = tag.split("=", 1)
	data[k] = v

with open(report_file, "a") as f:
	json.dump(data, f)
	f.write("\n")
' "$report_file" "date=$(date --utc --iso-8601=ns)" "$@"
	else
		cat - >&2
	fi
}

detect_platform()
{
	. /etc/os-release
	os_name="$ID"
	os_version="${VERSION_ID%%.*}"
	os_arch="$(uname -m)"
	if [ -e /etc/debian_version ]; then
		case "$os_arch" in
			x86_64)  pkg_arch="amd64" ;;
			aarch64) pkg_arch="arm64" ;;
		esac
		if [ -n "$VERSION_CODENAME" ]; then
			os_codename="$VERSION_CODENAME"
		else
			case "$os_name$os_version" in
				debian10) os_codename="buster"   ;;
				debian11) os_codename="bullseye" ;;
				debian12) os_codename="bookworm" ;;
				ubuntu18) os_codename="bionic"   ;;
				ubuntu20) os_codename="focal"    ;;
				ubuntu22) os_codename="jammy"    ;;
				ubuntu24) os_codename="noble"    ;;
			esac
		fi
	fi

	case "$os_name$os_version" in
		rhel7|centos7|cloudlinux7|virtuozzo7)
			package_manager="yum"
		;;
		rhel*|centos*|cloudlinux*|almalinux*|rocky*)
			package_manager="dnf"
		;;
		debian*|ubuntu*)
			package_manager="apt"
		;;
	esac

	if [ "$os_name" = "ubuntu" -o "$os_name" = "debian" ]; then
		PRODUCT_ROOT_D="/opt/psa"
	else
		PRODUCT_ROOT_D="/usr/local/psa"
	fi
}

has_os_impl_function()
{
	local prefix="$1"
	local fn="${prefix}_${os_name}${os_version}"
	is_function_defined "$fn"
}

call_os_impl_function()
{
	local prefix="$1"
	shift
	local fn="${prefix}_${os_name}${os_version}"
	"$fn" "$@"
}

skip_checker_on_flag()
{
	local name="$1"
	local flag="$2"

	if [ -f "$flag" ]; then
		echo "$name was skipped due to flag file." >&2
		exit $RET_SUCCESS
	fi
}

skip_checker_on_env()
{
	local name="$1"
	local env="$2"

	if [ -n "$env" ]; then
		echo "$name was skipped due to environment variable." >&2
		exit $RET_SUCCESS
	fi
}

checker_main()
{
	local fnprefix="$1"
	shift

	detect_platform
	# try to execute checker only if all attributes are detected
	[ -n "$os_name" -a -n "$os_version" ] || return $RET_SUCCESS

	for checker in "${fnprefix}_${os_name}${os_version}" "${fnprefix}_${os_name}" "${fnprefix}"; do
		if is_function_defined "$checker"; then
			local rc=$RET_SUCCESS
			"$checker" "$@" || rc=$?
			[ "$(( $rc & $RET_FATAL ))" = "0" ] || return $RET_FATAL
			[ "$(( $rc & $RET_WARN  ))" = "0" ] || return $RET_WARN
			return $rc
		fi
	done
	return $RET_SUCCESS
}

#!/bin/sh
### Copyright 1999-2026. WebPros International GmbH. All rights reserved.

# If env variable PLESK_INSTALLER_ERROR_REPORT=path_to_file is specified then in case of error
# free_ram_check.sh writes single line json report into it with the following fields:
# - "stage": "ramcheck"
# - "level": "error"
# - "errtype": "notenoughfreeram"
# - "required": required RAM, human readable (e.g. "600 MB")
# - "available": available RAM, human readable (e.g. "255 MB")
# - "needtofree": amount of RAM which should be added or freed, human readable (e.g. "345 MB")
# - "date": time of error occurance ("2020-03-24T06:59:43,127545441+0000")
# - "error": human readable error message ("There is not enough RAM available.")

human_readable_size()
{
	echo "$1" | awk '
		function human(x) {
			s = "MGTEPYZ";
			while (x >= 1000 && length(s) > 1) {
				x /= 1024; s = substr(s, 2);
			}
			# 0.05 below will make sure the value is rounded up
			return sprintf("%.1f %sB", x + 0.05, substr(s, 1, 1));
		}
		{ print human($1); }'
}

check_free_ram()
{
	local required="$1"
	local available_mem
	available_mem=$(free -m | awk '/^Mem:/ {print $7}')

	if [ "$available_mem" -lt "$required" ] ; then
		local needtofree
		needtofree="`human_readable_size $((required - available_mem))`"
		make_error_report 'stage=ramcheck' 'level=error' 'errtype=notenoughfreeram' \
			"required=$required MB" "available=$available_mem MB" "needtofree=$needtofree" <<-EOL
				There is not enough RAM available. You need to free up $needtofree.
		EOL
		exit $RET_FATAL
	fi
}

checker_main 'check_free_ram' "$@"