Book Image

Angular Services

By : Sohail Salehi
Book Image

Angular Services

By: Sohail Salehi

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (15 chapters)
Angular Services
About the Author
About the Reviewer
Customer Feedback

Chapter 5.  The Notifier Service - Creating Cron Jobs in Angular

This chapter is about utilizing previous services in an automated fashion. The goal that we are going to achieve is implementing a notifier service, which collects and rates news entries and notifies us if their ranks passed a predefined threshold. We can choose to be notified in two ways:

  • We can be notified via the application itself. That means the moment we open the application. There should be a badge component where it reflects the number of news entries that have passed the rank threshold and when we click on the badge, it should open the page showing those news items.

  • Or we can be notified by email. This provides more freedom because we don't need to open the application to find out what is happening and the moment a news item is qualified as a member of notification list, an email should be sent to us - by application - containing that list.

This introduction suggests two new features for our application. First, we...