Building Block View

5. Building Block View

5.1. Landscape

5.2. Whitebox

Table 5.1 Building blocks
Extension	Content Extension.
API Application	REST API to expose functionality.

5.3. Building Blocks Level 2

5.3.1. Extension

The Dastan Content Extension is a versatile browser solution designed for users who want to be rewarded for engaging with Dastan content on YouTube, Twitter, and more.

Table 5.3 Extension blackboxes
Observers	Observers are responsible for observing content start and stop and reporting it to the content client.
Content Client	A SignalR JavaScript client that is used to communicate with the content API application.
Popup Manager	When the user clicks the extension icon, relevant information will be displayed. This manages the information on the popup window.

5.3.2. API Application

The content API application is a REST API that exposes functionality to clients such as the web application and the extension.

5.4. Building Blocks Level 3

5.4.1. Extension

Observers

Table 5.4 Extension Observers
Observer Base	The observer base class is common amongst all observers that are used to monitor usage. Interface will include start, stop, and a callback method for when an observation is made. Callback method will be typed to the observer implementation, and requires a returned value of a common type for sending to the server. Server responses are sent to the popup manager for UI updates.
Mutation Observer Base	The mutation observer base class is common amongst all mutation observers. Interface will include start and stop methods with parameters for what mutations to observe and how to extract relevant information needed for server. More info on mutation observers.
Events Observer Base	The events observer base class is common amongst all event observers. Interface will include start and stop methods with parameters for what events to observe and how to extract relevant information needed for server. More info on event listeners.
Observer Implementations	Every social website monitored will implement appropriate observers. Mutation observers will likely be common for every site, where event observers will only apply if there are events produced that can be listened to.