main.go

package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"

	"login-sample/platform/authenticator"
	"login-sample/platform/router"

	"github.com/gin-gonic/gin"
)

func main() {
	auth, err := authenticator.New()
	if err != nil {
		log.Fatalf("Failed to initialize the authenticator: %v", err)
	}

	gin.SetMode(gin.ReleaseMode)
	rtr := router.New(auth)

	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	srv := &http.Server{Addr: ":" + port, Handler: rtr}

	idleConnsClosed := make(chan struct{})

	go func() {
		sigterm := make(chan os.Signal, 1)
		signal.Notify(sigterm, syscall.SIGINT, syscall.SIGTERM)
		<-sigterm

		log.Printf("Terminating")

		if err := srv.Shutdown(context.Background()); err != nil {
			log.Fatalf("HTTP server Shutdown: %v", err)
		}
		close(idleConnsClosed)
	}()

	log.Printf("Listening on port %s", port)
	if err := srv.ListenAndServe(); err != http.ErrServerClosed {
		// Error starting or closing listener:
		log.Fatalf("HTTP server ListenAndServe: %v", err)
	}

	<-idleConnsClosed
}