AI Chat Bestie

AI Chat Bestie is an unofficial ChatGPT app.

By connecting directly to the API it can provide faster responses, a more customizable UI, and many more features and integrations.

Hosted version available at https://aichatbestie.com.

Features

Faster response times
Searchable chat history
Customizable system message
Prompt library
Regenerate messages
Bring your own key

Self-hosting

The app uses sveltekit and can run directly in the terminal with npm run dev. nhost is only needed for account-related features and the app will run just fine without it.

Terminals

Sveltekit - npm run dev
nhost - nhost dev
stripe - stripe listen --forward-to http://localhost:3000/webhooks/completed-checkout

Development scripts

npm run dev runs sveltekit server
nhost dev runs nhost
npm run check syncs .env variables

-- Stripe checkout --

stripe login stripe listen --forward-to http://localhost:3000/webhooks/completed-checkout stripe trigger checkout.session.completed

-- ngrok (hasura webhooks) --

npx ngrok http --subdomain=ktruong008 3000

-- email --

Supplied by Mailhog, usually at localhost:8025

Production branches

nhost-production - nhost/hasura/migrations/metadata

Deployment checklist

Update & switch .env (dev to prod)
Build & push Docker images (dependencies & server)
Update K8s files
Deploy nhost branch (if needed)
Deploy K8s updates

Deployment commands

Make sure to switch to the appropriate Dockerfile code, using dependencies.Dockerfile and production.Dockerfile, when running the build commands.

docker build -t ktruong008/aichatbestie-dependencies:2.0.0 . docker build -t ktruong008/aichatbestie:2.0.0 . docker push ktruong008/aichatbestie-dependencies:2.0.0

See keylay-apps-infrastructure README for k8s deployment instructions

nhost quirks/undocumented

nhost client seems to keep track of authenticated state of users in some session
nhost client automatically does stuff with auth/refresh tokens using the admin role
nhost client automatically attaches user_vars to client graphql requests:
http://localhost:1337/v1/functions/time (example for accessing nhost functions)
use isAuthenticatedAsync over isAuthenticated and call getSession AFTER the authentication check or else the session sometimes won't be available

// For authenticated user
user_vars: {
  "x-hasura-role":"user",
  "x-hasura-user-isanonymous":"false",
  "x-hasura-user-id":"cef5e0e7-c7eb-4099-b891-1ff5055e1c55"
}

// For public user
user_vars: {"x-hasura-role":"public"}

nhost client automatically sends access token as request header in client graphql requests

// If the user is signed in, the user's access token is attached in the Authorization header.

"If the function does not export a default request/response handler it should not be served as a http endpoint." – Johan Eliasson

Felte quirks

InitialValues do not get re-initialized.
If the html disappears so does the field data
Something funky going on with FieldArrays and unsetField pablo-abc/felte#114

Stripe checkout and friends

Overview

https://stripe.com/docs/billing/subscriptions/overview

Stripe checkout does not behave like Shopify app subscriptions. Customers/accounts can possess many subscriptions and new subscriptions do not cancel existing subscriptions. On one hand, this gives more feature flexibility such as customer portals and more flexible payment arrangements, customized proration/cancellation policies, and more. But on the other hand, it's a lot more work.

Major subscription lifecycle events can be found here:

https://stripe.com/docs/billing/subscriptions/overview#subscription-events

checkout.session.completed customer.subscription.created customer.subscription.deleted invoice.created invoice.paid invoice.payment_failed

Test cards

4242424242424242 - Successful payment 4000000000009995 - Failed payment 4000002500003155 - Requires authentication

nhost and auth

Only way to reliably gain isAuthenticated status is via isAuthenticatedAsync (other methods fail due to race/timing conditions)
isAuthenticatedAsync clogs shit up for 15 seconds if nhost server is down, halting everything else in the process.
App MUST go on with or without hasura, hasura is only enhancement, not a requirement.
therefore use hacky onAuthStateChanged to get around this, along with svelte stores to fetch and update user data
this means invalidateAll won't affect db state.

License

AI Chat Bestie is licensed under the MIT license. See the LICENSE file for more information.

nknganda / aichatbestie