dmitriygnatenko-v2/internal/services/handler/admin/auth.go

package admin

import (
	"database/sql"
	"errors"
	"time"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"

	"git.dmitriygnatenko.ru/dima/dmitriygnatenko-v2/internal/models"
)

func LoginHandler(
	envService EnvService,
	authService AuthService,
	userRepository UserRepository,
) fiber.Handler {
	return func(fctx *fiber.Ctx) error {
		ctx := fctx.Context()
		var validate = validator.New()
		var hasErrors bool

		form := models.LoginForm{}

		if fctx.Method() == fiber.MethodPost {
			if err := fctx.BodyParser(&form); err != nil {
				return err
			}

			if err := validate.Struct(form); err != nil {
				hasErrors = true
			}

			if !hasErrors {
				user, err := userRepository.Get(ctx, form.Username)
				if err != nil {
					if !errors.Is(err, sql.ErrNoRows) {
						return err
					}
					hasErrors = true
				}

				if !hasErrors {
					if authService.IsCorrectPassword(form.Password, user.Password) {
						token, err := authService.GenerateToken(*user)
						if err != nil {
							return err
						}

						cookie := new(fiber.Cookie)
						cookie.Name = envService.JWTCookie()
						cookie.Value = token
						cookie.Expires = time.Now().Add(time.Duration(envService.JWTLifetime()) * time.Second)
						fctx.Cookie(cookie)

						return fctx.Redirect("/admin")
					}
					hasErrors = true
				}
			}
		}

		return fctx.Render("admin/login", fiber.Map{
			"form":      form,
			"hasErrors": hasErrors,
		})
	}
}

func LogoutHandler(
	envService EnvService,
) fiber.Handler {
	return func(fctx *fiber.Ctx) error {
		cookie := new(fiber.Cookie)
		cookie.Name = envService.JWTCookie()
		cookie.Expires = time.Now().Add(-1 * time.Second)
		fctx.Cookie(cookie)

		return fctx.Redirect("/admin/login")
	}
}