Mpluz* Assignment

This is a TypeScript project to get you started with your Mpluz* assignment.

It uses jest for testing, prettier for formatting, and typedoc for document generation.

npm run lint will compare your code against the linter settings. This repository is set to use spaces for indentation and single quotes for strings.

npm run test will run your tests. For a coverage report, use npm run test:coverage. And to have tests watch for changes and automatically re-run, use npm run test:watch.

npm run start:watch will run App.ts and re-run on changes.

Application

Intro

This TypeScript codebase is a console application to simulate a Nexxis OR. It works with a router, encoders, and decoders. The encoders have video inputs which can be routed to a decoder which has outputs. For this to happen, the encoder must have a video signal on the input, and the decoder must have a destination connected to an output (e.g., monitor).

Details

Router

A Nexxis OR can have only one Router, this Router can have multiple Dongles (encoders, decoders and transcoders). An Encoder is an input device and a Decoder is a output device. A Transcoder is used to convert the high bandwidth input stream to a recordable bandwith (not used in this assigment).

Dongles (Encoders / Decoders)

A Dongle can have 1 or 2 connectors (inputs or outputs) depending on the model.

The Dogle of type Encoder can:

1. connect an image source to an Input and it's InputState will change from NoSignal to Signal
2. disconnected an image source from an Input and it's InputState will change from Signal to NoSignal
3. emit an event when an image source is disconnected

The Dogle of type Decoder can:

1. connected an image destination (e.g. monitor) to an Output and it's OuputState will change from Disconnected to Connected
2. disconnected a destination (e.g. monitor) from an Output and it's OuputState will change from Connected to Disconnected
3. routed an Input of an Encoder to an Ouput
4. unrouted an Input of an Encoder to an Ouput
5. handle an Input disconnected event to unroute disconnected Input from Output(s)

Assigment

The assignment consists of three parts:

1. A bugfix
2. A new feature
3. A change of handling events

Each part should be a separate branch on the codebase. To start working on a new branch, do a checkout while creating the branch, e.g., git checkout -b MP-001-Bugfix. Create a NOTES.md file in the root of the project with a description of the steps that will be taken to solve each part. Commit each piece of finished code so it is easy to track progress to your chosen solution.

Bugfix (MP-001)

One of the test is failing. Please find out why and fix the problem.

New feature (MP-002)

Dongles have a lot of properties, but it is not possible to give them a label for easy reference. Please add the feature to the Dongles so that a label can be added to an Encoder and Decoder. If provided, the label should be a string of max 15 characters. The label should be accessible via a getter.

example:

``` const encoder = new Encoder(DongleModel.MNA240, '192.168.0.1'); encoder.addLabel('CAMERA 1');

console.log(encoder.label); -> 'CAMERA 1' ```

Change of event handling (MP-003)

The event listeners are now initiated in the Outputs via: events.on('inputDisconnected', () => this.handleInputDisconnected());

With this solution, there is a lot of overhead as can be seen in the console at OR-1 - Disconnecting. Each Output has its own listener. Please optimize the handling of events so that there is only one event listener per Router.