justguestbook/cmd/justguestbookd/main.go

package main

import (
	"flag"
	"fmt"
	"justguestbook/internal/configuration"
	"justguestbook/internal/database/sqlite"
	"justguestbook/internal/handlers"
	"justguestbook/pkg/server"
	"log"
	"net/netip"
	"os"
	"os/signal"
	"strings"
	"syscall"
)

var version string

var configFilePath *string = flag.String("conf", "/etc/justguestbook.yaml", "path to a configuration file")
var showVersion *bool = flag.Bool("v", false, "show version")

func main() {
	flag.Parse()

	if *showVersion {
		fmt.Println("justguestbookd ver.", version, "\nCopyright (c) 2022 Alexander \"Arav\" Andreev <me@arav.top>")
		return
	}

	log.SetFlags(0)

	config, err := configuration.LoadConfiguration(*configFilePath)
	if err != nil {
		log.Fatalln(err)
	}

	if len(config.Owner.Password) == 0 {
		log.Fatalln("empty password is not allowed")
	}

	db, err := sqlite.New(config.DBPath)
	if err != nil {
		log.Fatalln("failed to init DB:", err)
	}
	defer db.Close()

	hand := handlers.New(config.Owner.Name, config.Owner.Password, config.AnonymousPosterName, config.PageSize, db, config.CaptchaAddr)

	srv := server.NewHttpServer()

	srv.GET("/", hand.Entries)
	srv.POST("/", hand.New)
	srv.DELETE("/:entry", hand.Delete)
	srv.POST("/:entry/reply", hand.Reply)
	srv.DELETE("/:entry/reply", hand.Delete)

	var network string
	if !strings.ContainsRune(config.ListenOn, ':') {
		network = "unix"
		defer os.Remove(config.ListenOn)
	} else {
		ap, err := netip.ParseAddrPort(config.ListenOn)
		if err != nil {
			log.Fatalln(err)
		}

		if ap.Addr().Is4() {
			network = "tcp4"
		} else if ap.Addr().Is6() {
			network = "tcp6"
		}
	}

	if err := srv.Start(network, config.ListenOn); err != nil {
		log.Fatalln("failed to start a server:", err)
	}

	doneSignal := make(chan os.Signal, 1)
	signal.Notify(doneSignal, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)

	<-doneSignal

	if err := srv.Stop(); err != nil {
		log.Fatalln("failed to properly shutdown a server:", err)
	}

}