1 files changed, 47 insertions, 0 deletions
diff --git a/auth/refresh_middleware.go b/auth/refresh_middleware.go
new file mode 100644
index 0000000..00f73bf
--- /dev/null
+++ b/auth/refresh_middleware.go
@@ -0,0 +1,47 @@
+package auth
+
+import (
+	"github.com/golang-jwt/jwt/v4"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/bson"
+	"github.com/MikunoNaka/OpenBills-server/user"
+	"github.com/gin-gonic/gin"
+	"context"
+	"net/http"
+)
+
+func verifyRefreshToken() gin.HandlerFunc {
+	return func(ctx *gin.Context) {
+		refreshToken, err := ctx.Cookie("refreshToken")
+		if err == nil {
+			token, err := jwt.ParseWithClaims(refreshToken, &jwt.StandardClaims{}, func(token *jwt.Token) (interface{}, error) {
+				return []byte(refreshSecret), nil
+			})
+			if err != nil { // invalid token
+				ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "refresh token expired"})
+			} else { // valid token
+				// convert id from string to ObjectID
+	            id, _ := primitive.ObjectIDFromHex(token.Claims.(*jwt.StandardClaims).Issuer)
+
+				// check if user exists
+	            var u user.User
+	            if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil {
+				    ctx.AbortWithStatusJSON(http.StatusNotFound, gin.H{"message": "user not found"})
+	            } else {
+					// check if this refreshToken is in DB
+					for _, i := range u.Sessions {
+						if i.Token == refreshToken {
+    			            ctx.Set("user", u)
+    			            ctx.Next()
+						} else {
+				            ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "refresh token expired"})
+						}
+					}
+				}
+			}
+		} else {
+		    // invalid Authorization header
+	        ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "not logged in"})
+		}
+	}
+}