nativescript-shared-notification-delegate

Nativescript Shared Notification Delegate

This project aims to prevent the shortcomings that come from the iOS implementation of only allowing a single delegate.

Installation

tns plugin add nativescript-shared-notification-delegate

Usage

Import SharedNotificationDelegate and add Observers

import { SharedNotificationDelegate } from 'nativescript-shared-notification-delegate';

...


SharedNotificationDelegate.addObserver({
    userNotificationCenterWillPresentNotificationWithCompletionHandler: (notificationCenter, notification, handler, stop, next) => {
        console.log("notification received by observer");
        // is this notification something I should handle?
        if (shouldHandleThis) {
            // do stuff
            // intercept it and show alert
            handler(UNNotificationPresentationOptions.Alert);
            return;
        }
        // not mine, next should handle
        next();
    }
});

API

SharedNotificationDelegate Methods

Method	Description
addObserver(observer: DelegateObserver, priority?: number): void	Adds a delegate observer of a certain priority (lower means first). Default priority is 100.
removeObserver(observer: DelegateObserver)	removes a DelegateObserver

DelegateObserver Interface

A DelegateObserver can implement 3 methods from UNUserNotificationCenterDelegate with the addition of some details:

interface DelegateObserver {
    userNotificationCenterDidReceiveNotificationResponseWithCompletionHandler?(center: any /* UNUserNotificationCenter */, response: any /* UNNotificationResponse */, completionHandler: () => void, next: () => void): void;
    userNotificationCenterOpenSettingsForNotification?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, stop: () => void, next: () => void): void;
    userNotificationCenterWillPresentNotificationWithCompletionHandler?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, completionHandler: (p1: any /* UNNotificationPresentationOptions */) => void, next: () => void): void;
}

All the functions are called asynchronously in a chain.

Calling a completionHandler immediately stops the observer chain. next() must be called if the method will not be handling the notification.

Calling stop() on userNotificationCenterOpenSettingsForNotification prevents the event bubbling to the rest;

Only one method will be processed at a time, this means you can take as long as you want (including making http calls, for example), as long as you just call completionHandler, stop and next when you're finished.

License

Apache License Version 2.0, January 2004