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Angular Services

You're reading from   Angular Services -

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Product type Paperback
Published in Feb 2017
Publisher Packt
ISBN-13 9781785882616
Length 294 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (9) Chapters Close

Preface 1. Setting Up the Environment 2. Introducing Wire-Frames FREE CHAPTER 3. The Collector Service - Using Controllers to Collect Data 4. The Rating Service - Data Management 5. The Notifier Service - Creating Cron Jobs in Angular 6. The Evidence Tree Builder Service - Implementing the Business Logic 7. The Report Generator Service - Creating Controllers to Set Report Template 8. The Accuracy Manager Service - Putting It All Together

Getting and rating the news periodically


Let's say we need to fetch fresh news twice a day. That means we need a service that runs every 12 hours, sends a request to the news agencies, and rates and saves them in the Firebase Realtime database. Later we will notify the user about the stored news.

Tip

You might ask why we need to store them in the database. We can email them as soon as we have filtered the right news. That is true for email notifications. But what if we needed to show them inside the application?

The first part of this scenario sounds familiar and we have already implemented it in the Collector service. However, we cannot use it right away and we need to modify the business logic a little.

The current Collector service saves the SELECTED news only. In other words, a news item will be persisted to the database, only if the user CLICKS on the checkbox for that item. The challenge is if we change this service to satisfy the automated tasks then we will lose the user interactivity...

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