first commit

services/jwt_service.go

@@ -0,0 +1,121 @@
+package services
+
+import (
+	"errors"
+	"strconv"
+	"time"
+
+	configs "goFiber/config"
+	"log"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+const (
+	TokenTypeAccess  = "access"
+	TokenTypeRefresh = "refresh"
+)
+
+type JWTClaim struct {
+	UserID    uint   `json:"user_id"`
+	Email     string `json:"email"`
+	IsAdmin   bool   `json:"is_admin"`
+	FirstName string `json:"first_name"`
+	LastName  string `json:"last_name"`
+	TokenType string `json:"token_type"`
+	jwt.RegisteredClaims
+}
+
+type JWTService struct{}
+
+func NewJWTService() *JWTService {
+	return &JWTService{}
+}
+
+func (s *JWTService) GenerateToken(
+	userID uint,
+	email string,
+	isAdmin bool,
+	firstName string,
+	lastName string,
+	tokenType string,
+	expiration time.Duration,
+) (string, error) {
+	now := time.Now()
+	claims := &JWTClaim{
+		UserID:    userID,
+		Email:     email,
+		IsAdmin:   isAdmin,
+		FirstName: firstName,
+		LastName:  lastName,
+		TokenType: tokenType,
+		RegisteredClaims: jwt.RegisteredClaims{
+			Subject:   strconv.FormatUint(uint64(userID), 10),
+			ExpiresAt: jwt.NewNumericDate(now.Add(expiration)),
+			IssuedAt:  jwt.NewNumericDate(now),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(configs.AppConfig.JWTSecret))
+}
+
+func (s *JWTService) GenerateTokenPair(
+	userID uint,
+	email string,
+	isAdmin bool,
+	firstName string,
+	lastName string,
+) (string, string, error) {
+	access, err := s.GenerateToken(
+		userID,
+		email,
+		isAdmin,
+		firstName,
+		lastName,
+		TokenTypeAccess,
+		time.Duration(configs.AppConfig.AccessTokenExpireMinutes)*time.Minute,
+	)
+	if err != nil {
+		return "", "", err
+	}
+
+	refresh, err := s.GenerateToken(
+		userID,
+		email,
+		isAdmin,
+		firstName,
+		lastName,
+		TokenTypeRefresh,
+		time.Duration(configs.AppConfig.RefreshTokenExpireDays)*24*time.Hour,
+	)
+	if err != nil {
+		return "", "", err
+	}
+
+	// Log generated tokens (access + refresh)
+	log.Printf("Generated token pair for user=%d email=%s access_exp=%dm refresh_exp=%dd", userID, email, configs.AppConfig.AccessTokenExpireMinutes, configs.AppConfig.RefreshTokenExpireDays)
+	log.Printf("access: %s", access)
+	log.Printf("refresh: %s", refresh)
+
+	return access, refresh, nil
+}
+
+func (s *JWTService) ValidateToken(signedToken string) (*JWTClaim, error) {
+	token, err := jwt.ParseWithClaims(signedToken, &JWTClaim{}, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, errors.New("unexpected signing method")
+		}
+		return []byte(configs.AppConfig.JWTSecret), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	claims, ok := token.Claims.(*JWTClaim)
+	if !ok || !token.Valid {
+		return nil, errors.New("invalid token claims")
+	}
+
+	return claims, nil
+}