Jammy

Multiplayer local-first native macOS app for indexing your stuff. Works offline.

Built with Tauri, Next.js, Replicache, DBngin, Postgres, TailwindCSS.

Getting Started

Install Tauri CLI:

npm install --save-dev @tauri-apps/cli

Install Postgres on MacOS

brew update
brew install postgresql

Download and install DBngin.

Using DBngin create a new PostgreSQL database server.

Using DBngin start your PostgreSQL database server.

Download and install TablePlus.

Using DBngin open your PostgreSQL database in TablePlus.

Your Postgres URI is: postgres://postgres:[name]@localhost:[port]/postgres

Example: postgres://postgres:jammy-one@localhost:1234/postgres

Run the development server:

npm run tauri dev

A little desktop app will appear.

In a new browser tab visit localhost:3000/api/init to create the message and replicache-client tables in your PostgreSQL database. This is successful if you recieve an ok in the browser.

You can now start submitting messages in the little desktop app.

Note: When clicking the Submit button, Replicache implements a mutation on the client-side (IndexedDB) and a mutation on the server (local Postgres). On the next pull, the client-side (IndexedDB) is updated with the authoritative changes of the server (local Postgres).

In this toy app, the local Postgres is the authoritative server.

Coming soon

The idealistic goal is to change the responsibility of the server. The native client is not reliant on the cloud server. This is achieved with the native client reading and writing to copy of the database held in a local Postgres server. The cloud servers' purpose is enabling an instant-ui multiplayer experience for clients syncing data between native clients and web clients.

listen for changes to the local Postgres server notifying clients to pull
push local Postgres mutations to cloud server (Supabase Postgres or Reflect Cloudflare Durable Objects) enabling multiplayer across devices
listen for changes to cloud server and pull changes to local Postgres

cindywu/jammy

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