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author | Michael Lando <ml636r@att.com> | 2017-06-09 03:19:04 +0300 |
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committer | Michael Lando <ml636r@att.com> | 2017-06-09 03:19:04 +0300 |
commit | ed64b5edff15e702493df21aa3230b81593e6133 (patch) | |
tree | a4cb01fdaccc34930a8db403a3097c0d1e40914b /catalog-ui/src/app/services/event-listener-service.ts | |
parent | 280f8015d06af1f41a3ef12e8300801c7a5e0d54 (diff) |
[SDC-29] catalog 1707 rebase commit.
Change-Id: I43c3dc5cf44abf5da817649bc738938a3e8388c1
Signed-off-by: Michael Lando <ml636r@att.com>
Diffstat (limited to 'catalog-ui/src/app/services/event-listener-service.ts')
-rw-r--r-- | catalog-ui/src/app/services/event-listener-service.ts | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/catalog-ui/src/app/services/event-listener-service.ts b/catalog-ui/src/app/services/event-listener-service.ts new file mode 100644 index 0000000000..51aa857e51 --- /dev/null +++ b/catalog-ui/src/app/services/event-listener-service.ts @@ -0,0 +1,85 @@ +/*- + * ============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. + */ +'use strict'; +import {Dictionary} from "../utils/dictionary/dictionary"; + +interface IEventListenerService { + +} + +interface ICallbackData { + callback:Function; + args:any[]; +} + +export class EventListenerService implements IEventListenerService { + + public observerCallbacks:Dictionary<string, ICallbackData[]> = new 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, callbackFunc?:Function) => { + if (this.observerCallbacks.containsKey(eventName)) { + + let callbacks: ICallbackData[] = this.observerCallbacks.getValue(eventName); + if(callbacks.length === 1) { + this.observerCallbacks.remove(eventName); + } else { + let filterCallbacks = _.filter(callbacks, (callBackObj) => { + return callBackObj.callback != callbackFunc; + }); + this.observerCallbacks.setValue(eventName, filterCallbacks); + } + + } + }; + + public notifyObservers = function (eventName:string, ...args) { + _.forEach(this.observerCallbacks.getValue(eventName), (callbackData:ICallbackData) => { + callbackData.callback(...args); + }); + }; +} |