seyfert/packages/discordeno/gateway/shard/connect.ts

import { Shard, ShardState } from "./types.ts";

export async function connect(shard: Shard): Promise<void> {
    // Only set the shard to `Connecting` state,
    // if the connection request does not come from an identify or resume action.
    if (![ShardState.Identifying, ShardState.Resuming].includes(shard.state)) {
        shard.state = ShardState.Connecting;
    }
    shard.events.connecting?.(shard);

    // Explicitly setting the encoding to json, since we do not support ETF.
    const socket = new WebSocket(`${shard.gatewayConfig.url}/?v=${shard.gatewayConfig.version}&encoding=json`);
    shard.socket = socket;

    // TODO: proper event handling
    socket.onerror = (event) => console.log({ error: event });

    socket.onclose = (event) => shard.handleClose(event);

    socket.onmessage = (message) => shard.handleMessage(message);

    return new Promise((resolve) => {
        socket.onopen = () => {
            // Only set the shard to `Unidentified` state,
            // if the connection request does not come from an identify or resume action.
            if (![ShardState.Identifying, ShardState.Resuming].includes(shard.state)) {
                shard.state = ShardState.Unidentified;
            }
            shard.events.connected?.(shard);

            resolve();
        };
    });
}