/
jwt.go
64 lines (53 loc) · 1.48 KB
/
jwt.go
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package services
import (
"errors"
"time"
"github.com/golang-jwt/jwt/v5"
"github.com/wuttinanhi/code-judge-system/entities"
)
type JWTService interface {
GenerateToken(user entities.User) (string, error)
ValidateToken(token string) (*entities.User, error)
}
type jwtService struct {
secret string
}
// GenerateToken implements services.JWTService.
func (s *jwtService) GenerateToken(user entities.User) (string, error) {
claims := &entities.JWTClaims{
UserID: user.ID,
DisplayName: user.DisplayName,
Email: user.Email,
Role: user.Role,
RegisteredClaims: jwt.RegisteredClaims{
ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
},
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
return token.SignedString([]byte(s.secret))
}
// ValidateToken implements services.JWTService.
func (s *jwtService) ValidateToken(token string) (*entities.User, error) {
parsedToken, err := jwt.ParseWithClaims(token, &entities.JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte(s.secret), nil
})
if err != nil {
return nil, err
}
claims, ok := parsedToken.Claims.(*entities.JWTClaims)
if !ok || !parsedToken.Valid {
return nil, errors.New("invalid token")
}
user := &entities.User{
ID: claims.UserID,
DisplayName: claims.DisplayName,
Email: claims.Email,
Role: claims.Role,
}
return user, nil
}
func NewJWTService(secret string) JWTService {
return &jwtService{
secret: secret,
}
}