1 files changed, 190 insertions, 0 deletions
diff --git a/sdnr/wt/odlux/framework/src/services/notificationService.ts b/sdnr/wt/odlux/framework/src/services/notificationService.ts
new file mode 100644
index 000000000..85d3f716b
--- /dev/null
+++ b/sdnr/wt/odlux/framework/src/services/notificationService.ts
@@ -0,0 +1,190 @@
+/**
+ * ============LICENSE_START========================================================================
+ * ONAP : ccsdk feature sdnr wt odlux
+ * =================================================================================================
+ * Copyright (C) 2019 highstreet technologies GmbH 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.
+ * ============LICENSE_END==========================================================================
+ */
+import * as X2JS from 'x2js';
+import { ApplicationStore } from '../store/applicationStore';
+import { SetWebsocketAction } from '../actions/websocketAction';
+
+const socketUrl = [location.protocol === 'https:' ? 'wss://' : 'ws://', 'admin', ':', 'admin', '@', location.hostname, ':', location.port, '/websocket'].join('');
+const subscriptions: { [scope: string]: SubscriptionCallback[] } = {};
+let socketReady: Promise<WebSocket>;
+let userLoggedOut = false;
+let wasWebsocketConnectionEstablished: undefined | boolean;
+let applicationStore: ApplicationStore | null;
+
+
+export interface IFormatedMessage {
+  notifType: string | null;
+  time: string;
+}
+
+export type SubscriptionCallback<TMessage extends IFormatedMessage = IFormatedMessage> = (msg: TMessage) => void;
+
+function formatData(event: MessageEvent): IFormatedMessage | undefined {
+
+  var x2js = new X2JS();
+  var jsonObj: { [key: string]: IFormatedMessage } = x2js.xml2js(event.data);
+  if (jsonObj && typeof (jsonObj) === 'object') {
+
+    const notifType = Object.keys(jsonObj)[0];
+    const formated = jsonObj[notifType];
+    formated.notifType = notifType;
+    formated.time = new Date().toISOString();
+    return formated;
+  }
+  return undefined;
+
+}
+
+export function subscribe<TMessage extends IFormatedMessage = IFormatedMessage>(scope: string | string[], callback: SubscriptionCallback<TMessage>): boolean {
+  const scopes = scope instanceof Array ? scope : [scope];
+
+  // send all new scopes to subscribe
+  const newScopesToSubscribe: string[] = scopes.reduce((acc: string[], cur: string) => {
+    const currentCallbacks = subscriptions[cur];
+    if (currentCallbacks) {
+      if (!currentCallbacks.some(c => c === callback)) {
+        currentCallbacks.push(callback);
+      }
+    } else {
+      subscriptions[cur] = [callback];
+      acc.push(cur);
+    }
+    return acc;
+  }, []);
+
+  if (newScopesToSubscribe.length === 0) {
+    return true;
+  }
+
+  return true;
+}
+
+
+export function unsubscribe<TMessage extends IFormatedMessage = IFormatedMessage>(scope: string | string[], callback: SubscriptionCallback<TMessage>): Promise<boolean> {
+  return socketReady.then((notificationSocket) => {
+    const scopes = scope instanceof Array ? scope : [scope];
+    scopes.forEach(s => {
+      const callbacks = subscriptions[s];
+      const index = callbacks && callbacks.indexOf(callback);
+      if (index > -1) {
+        callbacks.splice(index, 1);
+      }
+      if (callbacks.length === 0) {
+        subscriptions[s] === undefined;
+      }
+    });
+
+    // send a subscription to all active scopes
+    const scopesToSubscribe = Object.keys(subscriptions);
+    if (notificationSocket.readyState === notificationSocket.OPEN) {
+      const data = {
+        'data': 'scopes',
+        'scopes': scopesToSubscribe
+      };
+      notificationSocket.send(JSON.stringify(data));
+      return true;
+    }
+    return false;
+  });
+}
+
+export const startNotificationService = (store: ApplicationStore) => {
+  applicationStore = store;
+}
+
+const connect = (): Promise<WebSocket> => {
+  return new Promise((resolve, reject) => {
+    const notificationSocket = new WebSocket(socketUrl);
+
+    notificationSocket.onmessage = (event) => {
+      // process received event
+      if (typeof event.data === 'string') {
+        const formated = formatData(event);
+        if (formated && formated.notifType) {
+          const callbacks = subscriptions[formated.notifType];
+          if (callbacks) {
+            callbacks.forEach(cb => {
+              // ensure all callbacks will be called
+              try {
+                return cb(formated);
+              } catch (reason) {
+                console.error(reason);
+              }
+            });
+          }
+        }
+      }
+    };
+
+    notificationSocket.onerror = function (error) {
+      console.log("Socket error:");
+      console.log(error);
+      reject("Socket error: " + error);
+      if (applicationStore) {
+        applicationStore.dispatch(new SetWebsocketAction(false));
+      }
+    };
+
+    notificationSocket.onopen = function (event) {
+      if (applicationStore) {
+        applicationStore.dispatch(new SetWebsocketAction(true));
+      }
+      console.log("Socket connection opened.");
+      resolve(notificationSocket);
+
+      // send a subscription to all active scopes
+      const scopesToSubscribe = Object.keys(subscriptions);
+      if (notificationSocket.readyState === notificationSocket.OPEN) {
+        const data = {
+          'data': 'scopes',
+          'scopes': scopesToSubscribe
+        };
+        notificationSocket.send(JSON.stringify(data));
+      };
+    };
+
+    notificationSocket.onclose = function (event) {
+      console.log("socket connection closed");
+      if (applicationStore) {
+        applicationStore.dispatch(new SetWebsocketAction(false));
+      }
+      if (!userLoggedOut) {
+        socketReady = connect();
+      }
+    };
+  });
+}
+
+
+
+
+export const startWebsocketSession = () => {
+  socketReady = connect();
+  userLoggedOut = false;
+}
+
+export const endWebsocketSession = () => {
+  socketReady.then(websocket => {
+    websocket.close();
+    userLoggedOut = true;
+  })
+}
+
+
+
+