Building a voice assistant for an Angular app

With Alan’s voice assistant SDK for Web, you can create a voice assistant or chatbot and embed it to your Angular app. The Alan Platform provides you with all the tools and leverages the industry’s best Automatic Speech Recognition (ASR), Natural Language Understanding (NLU) and Speech Synthesis technologies to quickly build an in-app voice assistant from scratch.

In this tutorial, we will create a simple voice enabled Angular app. The app users will be able to click the voice assistant button and give custom voice commands, and Alan will reply to them.

What you will learn

  • How to add a voice interface to an Angular app

  • How to write simple voice commands for an Angular app

What you will need

To go through this tutorial, make sure Node.js and the Angular CLI are installed on your machine. For details, see Angular documentation.

Step 1. Sign up for Alan Studio

First, we need to sign up for Alan Studio — the web portal where we will create a dialog scenario, or the voice script, for our voice assistant.

  1. Go to Alan Studio.

  2. Sign up with a Google or GitHub account or with your email address.

    Note

    When you sign up to Alan Studio, Alan adds free interactions to your balance to let you get started. To get additional interactions to your balance, link your Alan account with your GitHub account and give stars to Alan repositories. For details, see Adding free interactions.

  3. In Alan Studio, click Create Voice Assistant. Select to create an empty project and give it any name you want.

Step 2: Create an Angular app

Now let’s create a simple Angular app.

  1. On your machine, navigate to the folder in which the app will reside and run the following command:

    Terminal
     ng new my-app
    

    The ng new command will prompt about features to include in the app. Press Enter on your keyboard to create an app with default features.

  2. Switch to the folder with the app:

    Terminal
     cd my-app
    
  3. Start the app:

    Terminal
     ng serve --open
    
    ../../../_images/angular-app-starter.png

Step 3: Install the Alan Web component

We need to add the Alan Web component to the app. In the app folder, install the Alan Web component with the following command:

Terminal
 npm i @alan-ai/alan-sdk-web

Step 4: Add the Alan button to the app

Now we need to update our app to add the Alan button to it.

  1. In the src/app folder, open the app.component.ts file.

  2. At the top of the file, add the import statement for the Alan Web component:

    Angular app
     import alanBtn from "@alan-ai/alan-sdk-web";
    
  3. In the AppComponent class, add the Alan button:

    Angular app
     export class AppComponent {
    
         alanBtnInstance;
    
         constructor(){
             this.alanBtnInstance = alanBtn({
                 key: 'YOUR_KEY_FROM_ALAN_STUDIO_HERE',
             });
         }
     }
    
  4. In the key field above, we need to replace YOUR_KEY_FROM_ALAN_STUDIO_HERE with the Alan SDK key for our Alan Studio project. In Alan Studio, at the top of the code editor, click Integrations, copy the value provided in the Alan SDK Key field and paste this value to key.

    Angular app
     export class AppComponent {
    
         alanBtnInstance;
    
         constructor(){
             this.alanBtnInstance = alanBtn({
                 key: '28b4365114e0f2f67d43485dbc3cb44a2e956eca572e1d8b807a3e2338fdd0dc/stage',
             });
         }
     }
    

Step 5. Add voice commands

Let’s add some voice commands so that we can interact with our Angular app through voice. In Alan Studio, open the project and, in the code editor, add the following intents:

Voice script
 intent(`What is your name?`, p => {
     p.play(`It's Alan, and yours?`);
 });

 intent(`How are you doing?`, p => {
     p.play(`Good, thank you. What about you?`);
 });

Now in the app click the Alan button and ask: What is your name? and How are you doing? Alan will give responses provided in the intents.

../../../_images/angular-app-button.png