💠 QuML-player library for Sunbird platform

The QuML player library components are powered by Angular. These components are designed to be used in sunbird consumption platforms (mobile app, web portal, offline desktop app) to drive reusability, maintainability, hence reducing the redundant development effort significantly.

📑 Getting Started

For help getting started with a new Angular app, check out the Angular CLI. If you have an Angular ≥ 9 CLI project, you could simply use our schematics to add sunbird-quml-player library to it.

For existing apps, follow the below-mentioned steps:

🏷️ Installation

Just run the following:

ng add @project-sunbird/sunbird-quml-player

It will install sunbird-quml-player for the default application specified in your angular.json. If you have multiple projects, and you want to target a specific application, you could specify the --project option

ng add @project-sunbird/sunbird-quml-player --project myProject

Schematics will create question-cursor-implementation.service.ts. Please update the listUrl in it. For more information refer question-cursor-implementation.service.ts and do not forget to add your question list API URL here, for example: listUrl = "https://staging.sunbirded.org/api/question/v1/list";

Manual installation

If you prefer not to use schematics or want to add sunbird-quml-player to an older project, you'll need to do the following:

Click here to show detailed instructions!

🏷️ Step 1: Install Packages

These are the peer Dependencies of the library, need to be installed in order to use this library.

npm install @project-sunbird/sunbird-quml-player --save
npm install @project-sunbird/sb-styles --save
npm install @project-sunbird/client-services --save
npm install bootstrap@^4.6.2 --save
npm install jquery --save
npm install katex --save
npm install lodash-es --save
npm install ngx-bootstrap@^7.1.0 --save

Note: As QuML library is build with angular version 12, we are using bootstrap@^4.6.2 and ngx-bootstrap@^7.1.0 which are the compatible versions. For more reference Check compatibility document for ng-bootstrap here

🏷️ Step 2: Add question-cursor-implementation.service

Create a question-cursor-implementation.service.ts in a project and which will implement the QuestionCursor abstract class.
QuestionCursor is an abstract class, exported from the library, which needs to be implemented. Basically, it has some methods which should make an API request over HTTP

For more information refer question-cursor-implementation.service.ts and do not forget to add your question list API URL here, for example: listUrl = "https://staging.sunbirded.org/api/question/v1/list";

🏷️ Step 3: Include the styles, scripts and assets in angular.json

Add the following under architect.build.assets for default project

{
  ...
  "build": {
    "builder": "@angular-devkit/build-angular:browser",
    "options": {
      ...
      ...
      "assets": [
        ...
        ...
        {
         "glob": "**/*.*",
         "input": "./node_modules/@project-sunbird/sunbird-quml-player/lib/assets/",
         "output": "/assets/"
        }
      ],
      "styles": [
        ...
        "src/styles.css",
        "./node_modules/@project-sunbird/sb-styles/assets/_styles.scss",
        "./node_modules/@project-sunbird/sunbird-quml-player/lib/assets/styles/quml-carousel.css",
        "./node_modules/katex/dist/katex.min.css"
      ],
      "scripts": [
        ...
        "./node_modules/katex/dist/katex.min.js",
        "./node_modules/jquery/dist/jquery.min.js"
      ]
    }
  }
  ...
  ...
},

🏷️ Step 4: Import the modules and components

Import the required modules such as CarouselModule, QumlLibraryModule, HttpClientModule and question-cursor-implementation.service as below:

  import { HttpClientModule } from '@angular/common/http';
  import { QumlLibraryModule, QuestionCursor } from '@project-sunbird/sunbird-quml-player';
  import { CarouselModule } from 'ngx-bootstrap/carousel';
  import { QuestionCursorImplementationService } from './question-cursor-implementation.service';

  @NgModule({
   ...

   imports: [ QumlLibraryModule, CarouselModule.forRoot(), HttpClientModule ],
   providers: [{
     provide: QuestionCursor,
     useClass: QuestionCursorImplementationService
   }]

   ...
  })

 export class AppModule { }

Note: To avoid CORS errors, add proxy configuration for API's refer - proxy.conf.json

🏷️ Send input to render QuML player

User can get a response from the api/questionset/v1/hierarchy/:do_id or can use the provided mock config for demo

Use the mock config in your component to send input to QuML player as playerConfig Click to see the mock - samplePlayerConfig

<quml-main-player [playerConfig]="samplePlayerConfig" ><quml-main-player>

🟠 Available components

Feature	Notes	Selector	Code	Input	Output
QuML Player	Can be used to render QuML	quml-main-player	<quml-main-player [playerConfig]="playerConfig"><quml-main-player>	playerConfig	playerEvent, telemetryEvent

🔻 Input Parameters

playerConfig: Object - [Required]

{
  context: Object    // Optional. Information about the telemetry and default settings for quml API requests
  metadata: Object  // Question hierarchy response
  config: Object   // default player config such as sidebar menu list
}

Note: context is optional, which is used for capturing the telemetry event. If context is not passed in playerConfig telemetry event of player will not be captured.

• Here is the detailed description of playerConfig: player-configuration

🔻 Output Events

1. playerEvent() - It provides heartbeat event for each action performed in the player.
2. telemetryEvent() - It provides the sequence of telemetry events such as START, INTERACT, IMPRESSION, SUMMARY, END

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Use as web components 🌏

QuML Library can also be used as web component which means user can import this library in any web application and use these custom components. Follow below-mentioned steps to use it in plain JavaScript project:

• Insert library as below:

  <script  type="text/javascript"  src="sunbird-quml-player.js"></script>

• Create a asset folder and copy all the files from here, library requires these assets internally to work well.

• Get sample playerConfig from here: playerConfig

• Pass the Question List API baseUrl for, e.g. https://staging.sunbirded.org/api/question/v1/list

• Create a custom HTML element: sunbird-quml-player

  const  qumlPlayerElement = document.createElement('sunbird-quml-player');

• Pass data using player-config

  qumlPlayerElement.setAttribute('player-config', JSON.stringify(playerConfig));

  Note: Attribute should be in string type

• Listen for the output events: playerEvent and telemetryEvent

  qumlPlayerElement.addEventListener('playerEvent', (event) => {
    console.log("On playerEvent", event);
  });
  qumlPlayerElement.addEventListener('telemetryEvent', (event) => {
    console.log("On telemetryEvent", event);
  });

• Append this element to existing element

  const myPlayer = document.getElementById("my-player");
  myPlayer.appendChild(qumlPlayerElement);

• ▶️ Refer demo example

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📑 QuML Player Contribution Guide

Repo Setup

• Install Node 14.x and Angular 12
• Clone the Repo with desired release-branch - https://github.com/project-sunbird/sunbird-quml-player
• Add the baseUrl in the environment.ts and proxy.conf.json files
• If there are any changes in API endpoints, update the app.constant.ts file
• Change the default content ID in app.component.ts file if pointing to different baseUrl
• Run npm i in root folder
• Run npm i in projects/quml-library
• Open two terminal windows (on root folder)
• Run npm run build once this run completes, run the next command - let it be running on 1st terminal window
• Run npm run serve on second terminal window (This will copy assets from the quml-library to the library dist folder)
• Now it will be served on http://localhost:4200/
• To run the web-component npm run build-web-component