background-data-service

AngularJs service that waits until network traffic is idle to make network calls in the background for future use.

This was originally built for an ionic mobile app for often visited pages that required global data that could not be cached locally as it contained PII (personally identifiable information) that needed to remain on the server unless in active use.

Get Started

(1) Use Bower to get background-data-service

bower install background-data-service

(2) Include BackgroundDataService.js in your angular app

(3) Add backgroundData to your main module's list of dependencies

(4) Call BackgroundDataService.init() after logging into your app and register deferral objects with BackgroundDataService.callMeWhenIdle(deferredRecent); for all the background services you want to call. See the example section for more details.

Example

NOTE: This is an Incomplete Example TokenService, RecentService, FavoritesService are not provided. You should replace TokenService with your authentication provider. RecentService and FavoritesService are the services that should be called when idle.

angular.module('yourApp').run(function ($q, $rootScope, TokenService, RecentService, FavoritesService) {
        // Data to get in the background when idle
        var deferredRecent = $q.defer();
        deferredRecent.promise.then(function(){
            //This calls two services simultaneously as the data they retrieve is small.  Register mulitple deferral
            //objects if your are retrieveing large amounts in the data in the background and don't want to over tax
            //your app.  
            RecentService.getRecent('patient');
            FavoritesService.getFavoritePrescriptions();
        });
        BackgroundDataService.callMeWhenIdle(deferredRecent);

        //Start the background idle timer after logging in, stop it when logging out
        $rootScope.$on(TokenService.authenticationStatusChanged, function (event, loggedIn) {
            if (loggedIn) {
                BackgroundDataService.init(3 /*idle seconds*/, true /* debug logging on */);
            } else {
                BackgroundDataService.stop();
            }
        });
    });

Questions, Comments, Concerns?

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