Build Real-Time
Apps 10x Faster

use cosmictron_sdk::*;

#[derive(BsatnSerialize, BsatnDeserialize)]
#[table(name = "messages")]
pub struct Message {
    #[primary_key] #[auto_inc]
    pub id: u64,
    #[index]
    pub channel_id: u64,
    pub content: String,
}

#[reducer]
pub fn send_message(
    channel_id: u64,
    content: String,
) {
    let msg = Message {
        id: 0,  // auto-assigned
        channel_id,
        content,
    };
    datastore::insert(&msg);
}

#[reducer(client_connected)]
pub fn on_connect() {
    info(&format!("User {} connected", 
        identity_abbr(&caller_identity())));
}

import { CosmictronClient } from '@cosmictron/client';

const client = new CosmictronClient(
  'ws://localhost:8080'
);

// Connect and authenticate
await client.connect();

// Subscribe to messages in real-time
await client.subscribe(
  'SELECT * FROM messages WHERE channel_id = 1',
  (update) => {
    update.inserts.forEach(msg =>
      console.log(`New: ${msg.content}`)
    );
  }
);

// Send a message
await client.callReducer(
  'chat',
  'send_message',
  { channel_id: 1, content: 'Hello!' }
);