Seed code for loopback server

Added seed project structure for loopback server. This will act as
intermediate layer between UI and backend. The angular UI app will be
serverd through this server.

Issue-ID: CCSDK-943
Change-Id: I03259782927eda0d7e5bff989f61a36f09a3afd8
Signed-off-by: Arundathi Patil <arundpil@in.ibm.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/cds-ui/server/src/sequence.ts b/cds-ui/server/src/sequence.ts
new file mode 100644
index 000000000..b27093147
--- /dev/null
+++ b/cds-ui/server/src/sequence.ts
@@ -0,0 +1,56 @@
+/*
+============LICENSE_START==========================================
+===================================================================
+Copyright (C) 2018-19 IBM Intellectual Property. All rights reserved.
+===================================================================
+
+Unless otherwise specified, all software contained herein is licensed
+under the Apache License, Version 2.0 (the License);
+you may not use this software 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.
+============LICENSE_END============================================
+*/
+
+import { inject } from '@loopback/context';
+import {
+  FindRoute,
+  InvokeMethod,
+  ParseParams,
+  Reject,
+  RequestContext,
+  RestBindings,
+  Send,
+  SequenceHandler,
+} from '@loopback/rest';
+
+const SequenceActions = RestBindings.SequenceActions;
+
+export class MySequence implements SequenceHandler {
+  constructor(
+    @inject(SequenceActions.FIND_ROUTE) protected findRoute: FindRoute,
+    @inject(SequenceActions.PARSE_PARAMS) protected parseParams: ParseParams,
+    @inject(SequenceActions.INVOKE_METHOD) protected invoke: InvokeMethod,
+    @inject(SequenceActions.SEND) public send: Send,
+    @inject(SequenceActions.REJECT) public reject: Reject,
+  ) { }
+
+  async handle(context: RequestContext) {
+    try {
+      const { request, response } = context;
+      const route = this.findRoute(request);
+      const args = await this.parseParams(request, route);
+      const result = await this.invoke(route, args);
+      this.send(response, result);
+    } catch (err) {
+      this.reject(context, err);
+    }
+  }
+}