Support for password resets

users/handler/validate.go

@@ -0,0 +1,45 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	pb "github.com/micro/services/users/proto"
+	"gorm.io/gorm"
+)
+
+// Validate a token, each time a token is validated it extends its lifetime for another week
+func (u *Users) Validate(ctx context.Context, req *pb.ValidateRequest, rsp *pb.ValidateResponse) error {
+	// validate the request
+	if len(req.Token) == 0 {
+		return ErrMissingToken
+	}
+
+	return u.DB.Transaction(func(tx *gorm.DB) error {
+		// lookup the token
+		var token Token
+		if err := tx.Where(&Token{Key: req.Token}).Preload("User").First(&token).Error; err == gorm.ErrRecordNotFound {
+			return ErrInvalidToken
+		} else if err != nil {
+			logger.Errorf("Error reading from the database: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to the database")
+		}
+
+		// ensure the token is valid
+		if u.Time().After(token.ExpiresAt) {
+			return ErrTokenExpired
+		}
+
+		// extend the token for another lifetime
+		token.ExpiresAt = u.Time().Add(tokenTTL)
+		if err := tx.Save(&token).Error; err != nil {
+			logger.Errorf("Error writing to the database: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to the database")
+		}
+
+		// serialize the response
+		rsp.User = token.User.Serialize()
+		return nil
+	})
+}