create and moove into new directories for BegushiyBashkir and

yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarbacreate and moove into new directories for BegushiyBashkir and
yalarba

main_dc/BB/api_bb/internal/service/jwt_service.go

@@ -0,0 +1,61 @@
+// service/jwt_service.go
+package service
+
+import (
+	"errors"
+	"fmt"
+	"time"
+	
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type JWTService interface {
+	GenerateToken(userID uint, email string) (string, error)
+	ValidateToken(tokenString string) (*jwt.Token, error)
+	ExtractUserID(token *jwt.Token) (uint, error)
+}
+
+type jwtService struct {
+	secretKey string
+}
+
+func NewJWTService(secretKey string) JWTService {
+	return &jwtService{secretKey: secretKey}
+}
+
+type Claims struct {
+	UserID uint   `json:"user_id"`
+	Email  string `json:"email"`
+	jwt.RegisteredClaims
+}
+
+func (j *jwtService) GenerateToken(userID uint, email string) (string, error) {
+	claims := &Claims{
+		UserID: userID,
+		Email:  email,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+		},
+	}
+	
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(j.secretKey))
+}
+
+func (j *jwtService) ValidateToken(tokenString string) (*jwt.Token, error) {
+	return jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
+		}
+		return []byte(j.secretKey), nil
+	})
+}
+
+func (j *jwtService) ExtractUserID(token *jwt.Token) (uint, error) {
+	claims, ok := token.Claims.(*Claims)
+	if !ok {
+		return 0, errors.New("invalid token claims")
+	}
+	return claims.UserID, nil
+}