first commit

internal/pkg/token/payload.go

@@ -0,0 +1,43 @@
+package token
+
+import (
+	"errors"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// Different types of error returned by the VerifyToken function
+var (
+	ErrInvalidToken = errors.New("token is invalid")
+	ErrExpiredToken = errors.New("token has expired")
+)
+
+// Payload contains the payload data of the token
+type Payload struct {
+	ID       string `json:"id"`
+	Username string `json:"username"`
+	jwt.RegisteredClaims
+}
+
+// NewPayload creates a new token payload with a specific username and duration
+func NewPayload(id string, username string, duration time.Duration) *Payload {
+	payload := &Payload{
+		ID:       id,
+		Username: username,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(duration)), // 过期时间
+			IssuedAt:  jwt.NewNumericDate(time.Now()),               // 签发时间
+			NotBefore: jwt.NewNumericDate(time.Now()),               // 生效时间
+		},
+	}
+	return payload
+}
+
+// Valid checks if the token payload is valid or not
+func (payload *Payload) Valid() error {
+	if time.Now().After(payload.ExpiresAt.Time) {
+		return ErrExpiredToken
+	}
+	return nil
+}