seyfert/packages/discordeno/gateway/manager/prepareBuckets.ts

import { createLeakyBucket } from '../../util/bucket.ts';
import { GatewayManager } from './gatewayManager.ts';

export function prepareBuckets(gateway: GatewayManager) {
    for (let i = 0; i < gateway.gatewayBot.sessionStartLimit.maxConcurrency; ++i) {
        gateway.buckets.set(i, {
            workers: [],
            leak: createLeakyBucket({
                max: 1,
                refillAmount: 1,
                // special number which is proven to be working dont change
                refillInterval: gateway.spawnShardDelay,
            }),
        });
    }

    // ORGANIZE ALL SHARDS INTO THEIR OWN BUCKETS
    for (let shardId = gateway.firstShardId; shardId <= gateway.lastShardId; ++shardId) {
        // gateway.debug("GW DEBUG", `1. Running for loop in spawnShards function for shardId ${i}.`);
        if (shardId >= gateway.manager.totalShards) {
            throw new Error(
                `Shard (id: ${shardId}) is bigger or equal to the used amount of used shards which is ${gateway.manager.totalShards}`,
            );
        }

        const bucketId = shardId % gateway.gatewayBot.sessionStartLimit.maxConcurrency;
        const bucket = gateway.buckets.get(bucketId);
        if (!bucket) {
            throw new Error(
                `Shard (id: ${shardId}) got assigned to an illegal bucket id: ${bucketId}, expected a bucket id between 0 and ${
                    gateway.gatewayBot.sessionStartLimit.maxConcurrency - 1
                }`,
            );
        }

        // FIND A QUEUE IN THIS BUCKET THAT HAS SPACE
        // const worker = bucket.workers.find((w) => w.queue.length < gateway.shardsPerWorker);
        const workerId = gateway.calculateWorkerId(shardId);
        const worker = bucket.workers.find((w) => w.id === workerId);
        if (worker) {
            // IF THE QUEUE HAS SPACE JUST ADD IT TO THIS QUEUE
            worker.queue.push(shardId);
        } else {
            bucket.workers.push({ id: workerId, queue: [shardId] });
        }
    }
}