# sc-voice

Javascript implemenation of SuttaCentral Voice Assistance (SC-Voice) for vision-impaired. Includes:

* TTS adapter for [Amazon AWS Polly Text-to-Speech](https://aws.amazon.com/polly/) 
* romanized search for Pali terms (e.g., Mulapariyayasutta vs. Mūlapariyāyasutta)
* integration with SuttaCentral [bilara-data](https://github.com/suttacentral/bilara-data)

### Prerequisites

* Linux Debian 10 or Ubuntu 20.04
* Nodejs 14.x
* AWS Polly account (required)

### Installation
With a Linux console, install the software:

```
git clone https://github.com/sc-voice/sc-voice.git
cd sc-voice
```

Initialization requires super user access for your computer and you will
be asked to enter your computer superuser password.
```
./scripts/init.sh
```

Now update the content but do not reboot (i.e., Respond with <kbd>no</kbd> when asked to reboot)
```
./scripts/update-latest
```

As part of installation you will need to configure the AWS Polly TTS service adapter.

##### Configure Amazon AWS Polly 
The [Amazon AWS Polly Text-to-Speech](https://aws.amazon.com/polly/) service can be used to convert sutta text to speech.
To enable AWS Polly, you will need to [configure your credentials](https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/getting-started-nodejs.html#getting-started-nodejs-credentials)

Login to your AWS account and go to the IAM dashboard|Delete your root access keys|Manage Security Credentials|Access Keys...|Create New Access Key

<img src="https://raw.githubusercontent.com/sc-voice/sc-voice/master/src/assets/aws-keys.png"/>

```
aws configure
```

##### Launch localhost server
```
npm start
```

Open up <kbd>localhost</kbd> in your local browser and you will see Voice.
When you are done with voice, type <kbd>CTRL-C</kbd> in the terminal.

### Unit tests
```
npm run test
```
Unit tests take about 2 minutes.
The unit tests require AWS Polly. 

To execute a single unit/test, simply insert the text `TESTTEST`
into the `it("...")` title argument. Then run `npm run test:test`, 
which selectively tests such unit tests whenever a source file changes. 
This makes quick work of debugging or implementing a feature.

##### Test failures
* Some tests validate online APIs and may fail due to timeouts 
or `EAI_AGAIN` responses. Re-run tests and they should pass.
* Some tests validate online content which may change. For example, the number of search results may change slightly. Update the unit tests accordingly and re-run tests.

### Scripts

 | Command line script | Description |
 | :----- | :---------- |
 | `npm run test`  | Run service unit tests (about 2 minutes). |
 | `npm run serve` | Compile and reload SC-Voice Vue for development at http://localhost:8080 |
 | `npm run build` | Create production Vue build in `dist` folder |
 | `npm run lint`  | Run esLint to check *.js and *.vue files `|


### Other
#### Directory structure

* **src** contains Javascript source code
* **test** contains Javascript unit tests
* **scripts** contains miscellaneous scripts
* **local** contains local content not archived in git
* **public** Vue/Vuetify public HTML assets
* **words** contains language lexicons for search and speech.