+//
+// Copyright 2019 AT&T Intellectual Property
+// Copyright 2019 Nokia
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package controllers
+
+import (
+ "e2mgr/e2managererrors"
+ "e2mgr/logger"
+ "e2mgr/models"
+ "e2mgr/providers/httpmsghandlerprovider"
+ "encoding/json"
+ "net/http"
+ "net/http/httputil"
+ "strings"
+)
+
+type IE2TController interface {
+ GetE2TInstances(writer http.ResponseWriter, r *http.Request)
+}
+
+type E2TController struct {
+ logger *logger.Logger
+ handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider
+}
+
+func NewE2TController(logger *logger.Logger, handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider) *E2TController {
+ return &E2TController{
+ logger: logger,
+ handlerProvider: handlerProvider,
+ }
+}
+
+func (c *E2TController) GetE2TInstances(writer http.ResponseWriter, r *http.Request) {
+ c.logger.Infof("[Client -> E2 Manager] #E2TController.GetE2TInstances - request: %v", c.prettifyRequest(r))
+ c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetE2TInstancesRequest, nil, false)
+}
+
+func (c *E2TController) handleRequest(writer http.ResponseWriter, header *http.Header, requestName httpmsghandlerprovider.IncomingRequest, request models.Request, validateHeader bool) {
+
+ handler, err := c.handlerProvider.GetHandler(requestName)
+
+ if err != nil {
+ c.handleErrorResponse(err, writer)
+ return
+ }
+
+ response, err := handler.Handle(request)
+
+ if err != nil {
+ c.handleErrorResponse(err, writer)
+ return
+ }
+
+ if response == nil {
+ writer.WriteHeader(http.StatusNoContent)
+ c.logger.Infof("[E2 Manager -> Client] #E2TController.handleRequest - status response: %v", http.StatusNoContent)
+ return
+ }
+
+ result, err := response.Marshal()
+
+ if err != nil {
+ c.handleErrorResponse(err, writer)
+ return
+ }
+
+ c.logger.Infof("[E2 Manager -> Client] #E2TController.handleRequest - response: %s", result)
+ writer.Header().Set("Content-Type", "application/json")
+ writer.Write(result)
+}
+
+func (c *E2TController) handleErrorResponse(err error, writer http.ResponseWriter) {
+
+ var errorResponseDetails models.ErrorResponse
+ var httpError int
+
+ if err != nil {
+ switch err.(type) {
+ case *e2managererrors.RnibDbError:
+ e2Error, _ := err.(*e2managererrors.RnibDbError)
+ errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
+ httpError = http.StatusInternalServerError
+ default:
+ e2Error := e2managererrors.NewInternalError()
+ errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
+ httpError = http.StatusInternalServerError
+ }
+ }
+
+ errorResponse, _ := json.Marshal(errorResponseDetails)
+
+ c.logger.Errorf("[E2 Manager -> Client] #E2TController.handleErrorResponse - http status: %d, error response: %+v", httpError, errorResponseDetails)
+
+ writer.Header().Set("Content-Type", "application/json")
+ writer.WriteHeader(httpError)
+ _, err = writer.Write(errorResponse)
+
+ if err != nil {
+ c.logger.Errorf("#E2TController.handleErrorResponse - Cannot send response. writer:%v", writer)
+ }
+}
+
+func (c *E2TController) prettifyRequest(request *http.Request) string {
+ dump, _ := httputil.DumpRequest(request, true)
+ requestPrettyPrint := strings.Replace(string(dump), "\r\n", " ", -1)
+ return strings.Replace(requestPrettyPrint, "\n", "", -1)
+}