diff options
Diffstat (limited to 'catalog-ui/app/scripts/services/event-listener-service.ts')
-rw-r--r-- | catalog-ui/app/scripts/services/event-listener-service.ts | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/catalog-ui/app/scripts/services/event-listener-service.ts b/catalog-ui/app/scripts/services/event-listener-service.ts new file mode 100644 index 0000000000..67afd65c56 --- /dev/null +++ b/catalog-ui/app/scripts/services/event-listener-service.ts @@ -0,0 +1,78 @@ +/*- + * ============LICENSE_START======================================================= + * SDC + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ +/** + * Created by obarda on 7/4/2016. + */ +/// <reference path="../references"/> +module Sdc.Services { + + 'use strict'; + + interface IEventListenerService { + + } + + interface ICallbackData { + callback:Function; + args:any[]; + } + + export class EventListenerService implements IEventListenerService { + + public observerCallbacks:Utils.Dictionary<string, ICallbackData[]> = new Utils.Dictionary<string, Array<ICallbackData>>(); + + //register an observer + callback + public registerObserverCallback = (eventName:string, callback:Function, ...args) => { + let callbackData = { + callback: callback, + args: args + } + + if (this.observerCallbacks.containsKey(eventName)) { + let callbacks = this.observerCallbacks.getValue(eventName); + + // Only insert the callback if the callback is different from existing callbacks. + for (let i = 0; i < callbacks.length; i++) { + if (callbacks[i].toString() === callback.toString()) { + return; // Do not add this callback. + } + } + + callbacks.push(callbackData); + this.observerCallbacks.setValue(eventName, callbacks); + } else { + this.observerCallbacks.setValue(eventName, [callbackData]); + } + }; + + //unregister an observer + public unRegisterObserver = (eventName:string) => { + if (this.observerCallbacks.containsKey(eventName)) { + this.observerCallbacks.remove(eventName); + } + }; + + public notifyObservers = function (eventName:string, ...args) { + _.forEach(this.observerCallbacks.getValue(eventName), (callbackData:ICallbackData) => { + callbackData.callback(...args); + }); + }; + } +} |