// SiYuan - Build Your Eternal Digital Garden
// Copyright (c) 2020-present, b3log.org
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package model

import (
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/siyuan-note/siyuan/kernel/util"
)

func HookResident() {
	if util.Resident {
		return
	}

	for range time.Tick(time.Second * 30) {
		if 0 == util.CountSessions() {
			util.LogInfof("no active session, exit kernel process now")
			Close(false)
		}
	}
}

func HandleSignal() {
	c := make(chan os.Signal)
	signal.Notify(c, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM)
	s := <-c
	util.LogInfof("received os signal [%s], exit kernel process now", s)
	Close(false)
}