resend verification code to verify updated email

README.md

@@ -210,7 +210,7 @@ _Note:_ For **MySQL** driver, please [check issue: 7][42]
 | handler | logout.go | `1016` |
 | handler | passwordReset.go | `1021 - 1030` |
 | handler | twoFA.go | `1051 - 1056` |
-| handler | verification.go | `1061 - 1064` |
+| handler | verification.go | `1061 - 1065` |
 | service | common.go | `401 - 406` |
 | service | security.go | `501` |
 

controller/verification.go

@@ -180,3 +180,46 @@ func GetUnverifiedEmail(c *gin.Context) {
 
 	renderer.Render(c, resp, statusCode)
 }
+
+// ResendVerificationCodeToModifyActiveEmail issues new verification code upon request
+//
+// dependency: email service, email verification service, Redis,
+// relational database, JWT
+func ResendVerificationCodeToModifyActiveEmail(c *gin.Context) {
+	// verify that email service is enabled in .env
+	if !config.IsEmailService() {
+		renderer.Render(c, gin.H{"message": "email service not enabled"}, http.StatusNotImplemented)
+		return
+	}
+
+	// verify that email verification service is enabled in .env
+	if !config.IsEmailVerificationService() {
+		renderer.Render(c, gin.H{"message": "email verification service not enabled"}, http.StatusNotImplemented)
+		return
+	}
+
+	// verify that Redis is enabled in .env
+	if !config.IsRedis() {
+		renderer.Render(c, gin.H{"message": "Redis not enabled"}, http.StatusNotImplemented)
+		return
+	}
+
+	// verify that RDBMS is enabled in .env
+	if !config.IsRDBMS() {
+		renderer.Render(c, gin.H{"message": "relational database not enabled"}, http.StatusNotImplemented)
+		return
+	}
+
+	// verify that JWT service is enabled in .env
+	if !config.IsJWT() {
+		renderer.Render(c, gin.H{"message": "JWT service not enabled"}, http.StatusNotImplemented)
+		return
+	}
+
+	// get claims
+	claims := service.GetClaims(c)
+
+	resp, statusCode := handler.ResendVerificationCodeToModifyActiveEmail(claims)
+
+	renderer.Render(c, resp, statusCode)
+}

example/router/setupRouter.go

@@ -203,6 +203,8 @@ func SetupRouter(configure *gconfig.Configuration) (*gin.Engine, error) {
 			rEmail.POST("update", gcontroller.UpdateEmail)
 			// retrieve the email which needs to be verified
 			rEmail.GET("unverified", gcontroller.GetUnverifiedEmail)
+			// resend verification code to verify the modified email address
+			rEmail.POST("resend-verification-email", gcontroller.ResendVerificationCodeToModifyActiveEmail)
 
 			// User
 			rUsers := v1.Group("users")

handler/verification.go

@@ -422,3 +422,76 @@ func GetUnverifiedEmail(claims middleware.MyCustomClaims) (httpResponse model.HT
 	httpStatusCode = http.StatusOK
 	return
 }
+
+// ResendVerificationCodeToModifyActiveEmail receives tasks from controller.ResendVerificationCodeToModifyActiveEmail
+func ResendVerificationCodeToModifyActiveEmail(claims middleware.MyCustomClaims) (httpResponse model.HTTPResponse, httpStatusCode int) {
+	// check auth validity
+	ok := service.ValidateAuthID(claims.AuthID)
+	if !ok {
+		httpResponse.Message = "validation failed - access denied"
+		httpStatusCode = http.StatusUnauthorized
+		return
+	}
+
+	// read DB
+	db := database.GetDB()
+	tempEmail := model.TempEmail{}
+
+	// check 'temp_emails'
+	err := db.Where("id_auth = ?", claims.AuthID).First(&tempEmail).Error
+	if err != nil {
+		if err.Error() != database.RecordNotFound {
+			// db read error
+			log.WithError(err).Error("error code: 1065.1")
+			httpResponse.Message = "internal server error"
+			httpStatusCode = http.StatusInternalServerError
+			return
+		}
+
+		httpResponse.Message = "no pending request"
+		httpStatusCode = http.StatusBadRequest
+		return
+	}
+
+	// verification is pending to modify current email
+	if err == nil {
+		// decipher
+		if tempEmail.Email == "" {
+			if !config.IsCipher() {
+				e := errors.New("check env: ACTIVATE_CIPHER")
+				log.WithError(e).Error("error code: 1065.2")
+				httpResponse.Message = "internal server error"
+				httpStatusCode = http.StatusInternalServerError
+				return
+			}
+
+			tempEmail.Email, err = service.DecryptEmail(tempEmail.EmailNonce, tempEmail.EmailCipher)
+			if err != nil {
+				log.WithError(err).Error("error code: 1065.3")
+				httpResponse.Message = "internal server error"
+				httpStatusCode = http.StatusInternalServerError
+				return
+			}
+		}
+	}
+
+	// issue new verification code
+	emailDelivered, err := service.SendEmail(tempEmail.Email, model.EmailTypeVerifyUpdatedEmail)
+	if err != nil {
+		log.WithError(err).Error("error code: 1065.4")
+		httpResponse.Message = "email delivery service failed"
+		httpStatusCode = http.StatusInternalServerError
+		return
+	}
+	if err == nil {
+		if !emailDelivered {
+			httpResponse.Message = "failed to send verification email"
+			httpStatusCode = http.StatusServiceUnavailable
+			return
+		}
+	}
+
+	httpResponse.Message = "sent verification email"
+	httpStatusCode = http.StatusOK
+	return
+}