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+/*
+Copyright(c) 2017 AT&T Intellectual Property. All rights reserved.
+
+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.
+*/
+
+/* Middleware modules */
+
+"use strict";
+
+const utils = require('./utils');
+const log = require('./logging').getLogger();
+
+/* Assign a request ID and start time to each incoming request */
+exports.assignId = function(req, res, next) {
+ /* Use request ID from header if available, otherwise generate one */
+ req.startTime = new Date();
+ req.dcaeReqId = req.get('X-ECOMP-RequestID') || utils.generateId();
+ next();
+};
+
+
+/* Error handler -- send error with JSON body */
+exports.handleErrors = function(err, req, res, next) {
+ var status = err.status || 500;
+ var msg = err.message || err.body || 'unknown error'
+ res.status(status).type('application/json').send({status: status, message: msg });
+ log.audit(req, status, msg);
+
+ if (status >= 500) {
+ log.error(err, req);
+ }
+};
+
+/* Make sure Content-Type is correct for POST and PUT */
+exports.checkType = function(type){
+ return function(req, res, next) {
+ const ctype = req.header('content-type');
+ const method = req.method.toLowerCase();
+ /* Content-Type matters only for POST and PUT */
+ if (ctype === type || ['post','put'].indexOf(method) < 0) {
+ next();
+ }
+ else {
+ var err = new Error ('Content-Type must be \'' + type +'\'');
+ err.status = 415;
+ next (err);
+ }
+ };
+};
+
+/* Check that a JSON body has a set of properties */
+exports.checkProps = function(props) {
+ return function (req, res, next) {
+ const missing = props.filter(function(p){return !utils.hasProperty(req.body,p);});
+ if (missing.length > 0) {
+ var err = new Error ('Request missing required properties: ' + missing.join(','));
+ err.status = 400;
+ next(err);
+ }
+ else {
+ next();
+ }
+ };
+};
+
+