'init'

sc-lktx-backend/internal/common/utils/jwt.go

@@ -0,0 +1,101 @@
+// JWT Token 生成与解析 + 业务工具函数
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// JWTClaims JWT 载荷，包含用户 ID 和角色列表
+type JWTClaims struct {
+	UserID   uint   `json:"user_id"`
+	RoleCode string `json:"role_code"` // 角色(visitor/employee/guard)
+	jwt.RegisteredClaims
+}
+
+// AdminJWTClaims 管理员 JWT 载荷
+type AdminJWTClaims struct {
+	AdminID uint   `json:"admin_id"`
+	Account string `json:"account"`
+	jwt.RegisteredClaims
+}
+
+// GenerateAdminToken 生成管理员 JWT
+func GenerateAdminToken(adminID uint, account string, secret string, expireHours int) (string, error) {
+	claims := AdminJWTClaims{
+		AdminID: adminID,
+		Account: account,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(expireHours) * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    "lktx-admin",
+		},
+	}
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(secret))
+}
+
+// ParseAdminToken 解析管理员 JWT
+func ParseAdminToken(tokenString string, secret string) (*AdminJWTClaims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &AdminJWTClaims{}, 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(secret), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	if claims, ok := token.Claims.(*AdminJWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+	return nil, fmt.Errorf("invalid token")
+}
+
+// GenerateToken 生成 JWT（单角色，兼容旧版）
+func GenerateToken(userID uint, roleCode string, secret string, expireHours int) (string, error) {
+	claims := JWTClaims{
+		UserID:   userID,
+		RoleCode: roleCode,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(expireHours) * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    "lktx-mp",
+		},
+	}
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(secret))
+}
+
+// ParseToken 解析并验证 JWT
+func ParseToken(tokenString string, secret string) (*JWTClaims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, 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(secret), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	if claims, ok := token.Claims.(*JWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+	return nil, fmt.Errorf("invalid token")
+}
+
+// GenerateInviteCode 生成 16 位随机邀请码
+func GenerateInviteCode() string {
+	b := make([]byte, 8)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+// GenerateQRCodeContent 生成二维码内容
+func GenerateQRCodeContent(appointmentID uint) string {
+	return fmt.Sprintf("LKTX:APPT:%d:%d", appointmentID, time.Now().Unix())
+}