HalAI Overview

by John Vincent

Posted on October 25, 2023

HalAI is an Artificial Intelligence Chat application that fully supports Speech Synthesis.

HalAI user instructions may be given as text or speech.

HalAI Artificial Intelligence response options include text and speech.

HalAI voice options are configurable.

HalAI text instructions and responses also support HTML and Markdown.

HalAI

HalAI is an Artificial Intelligence Chat application.

HalAI fully supports Speech Synthesis and supports instructions as text or speech.

HalAI Artificial Intelligence response options include text and speech.

HalAI voice options are configurable.

HalAI text instructions and responses also support HTML and Markdown.

HalAI is the easiest way to interact with an AI system.

Use HalAI to organize and keep track of your AI conversations.

Live Deployment

HalAI at Digital Ocean

Technical

HalAI is a Progressive Web App (PWA)
HalAI uses an API from OpenAI
HalAI uses Speech Synthesis from Elevenlabs
HalAI is built using the MERN stack. The front-end is built using React, Material-UI, Redux, HTML5, Sass and CSS3, the server-side using Node with Express as the web server and MongoDB as the database.
HalAI is fully responsive, adapting for mobile, table and desktop viewports.
All routing is handled in the front-end by React
Extensive form validation and error handling is demonstrated throughout the app. On the front-end, field type, value, length etc is validated using HTML5, React and Redux. On the server-side, JOI performs detailed validation and a Mongoose schema provides further error checking for field values and uniqueness.
A fully-featured user registration system is integral to the application, with user registration and username / password recovery functionality provided.
An extensive API has been built to provide database access to the HalAI App using Express.
HalAI is fully unit tested on the front and server-side. For React testing, Jest has been used. For the server-side, Mocha and Chai, with extensive use of the Faker library to mock-out dependencies.
User authentication uses Json Web Tokens JWT
All client and server communications are performed using https.
HalAI fully implements Google Analytics
HalAI fully supports Google Webmaster Tools
HalAI is deployed to an Ubuntu droplet at Digital Ocean and kept running using PM2
HalAI resources are served from Nginx Server with a reverse proxy to pass certain requests to a Node Express Server.
The Ubuntu droplet at Digital Ocean can only be accessed with SSH from a particular client. All other access is disabled.