mbot/node_modules/@discordjs/ws/dist/index.mjs
2024-05-10 22:39:11 -07:00

1469 lines
48 KiB
JavaScript

var __defProp = Object.defineProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __require = /* @__PURE__ */ ((x) => typeof require !== "undefined" ? require : typeof Proxy !== "undefined" ? new Proxy(x, {
get: (a, b) => (typeof require !== "undefined" ? require : a)[b]
}) : x)(function(x) {
if (typeof require !== "undefined")
return require.apply(this, arguments);
throw Error('Dynamic require of "' + x + '" is not supported');
});
// ../../node_modules/.pnpm/tsup@8.0.2_typescript@5.4.5/node_modules/tsup/assets/esm_shims.js
import { fileURLToPath } from "url";
import path from "path";
var getFilename = /* @__PURE__ */ __name(() => fileURLToPath(import.meta.url), "getFilename");
var getDirname = /* @__PURE__ */ __name(() => path.dirname(getFilename()), "getDirname");
var __dirname = /* @__PURE__ */ getDirname();
// src/strategies/context/IContextFetchingStrategy.ts
async function managerToFetchingStrategyOptions(manager) {
const {
buildIdentifyThrottler,
buildStrategy,
retrieveSessionInfo,
updateSessionInfo,
shardCount,
shardIds,
rest,
...managerOptions
} = manager.options;
return {
...managerOptions,
gatewayInformation: await manager.fetchGatewayInformation(),
shardCount: await manager.getShardCount()
};
}
__name(managerToFetchingStrategyOptions, "managerToFetchingStrategyOptions");
// src/strategies/context/SimpleContextFetchingStrategy.ts
var SimpleContextFetchingStrategy = class _SimpleContextFetchingStrategy {
constructor(manager, options) {
this.manager = manager;
this.options = options;
}
static {
__name(this, "SimpleContextFetchingStrategy");
}
// This strategy assumes every shard is running under the same process - therefore we need a single
// IdentifyThrottler per manager.
static throttlerCache = /* @__PURE__ */ new WeakMap();
static async ensureThrottler(manager) {
const throttler = _SimpleContextFetchingStrategy.throttlerCache.get(manager);
if (throttler) {
return throttler;
}
const newThrottler = await manager.options.buildIdentifyThrottler(manager);
_SimpleContextFetchingStrategy.throttlerCache.set(manager, newThrottler);
return newThrottler;
}
async retrieveSessionInfo(shardId) {
return this.manager.options.retrieveSessionInfo(shardId);
}
updateSessionInfo(shardId, sessionInfo) {
return this.manager.options.updateSessionInfo(shardId, sessionInfo);
}
async waitForIdentify(shardId, signal) {
const throttler = await _SimpleContextFetchingStrategy.ensureThrottler(this.manager);
await throttler.waitForIdentify(shardId, signal);
}
};
// src/strategies/context/WorkerContextFetchingStrategy.ts
import { isMainThread, parentPort } from "node:worker_threads";
import { Collection as Collection2 } from "@discordjs/collection";
// src/strategies/sharding/WorkerShardingStrategy.ts
import { once } from "node:events";
import { join, isAbsolute, resolve } from "node:path";
import { Worker } from "node:worker_threads";
import { Collection } from "@discordjs/collection";
var WorkerSendPayloadOp = /* @__PURE__ */ ((WorkerSendPayloadOp2) => {
WorkerSendPayloadOp2[WorkerSendPayloadOp2["Connect"] = 0] = "Connect";
WorkerSendPayloadOp2[WorkerSendPayloadOp2["Destroy"] = 1] = "Destroy";
WorkerSendPayloadOp2[WorkerSendPayloadOp2["Send"] = 2] = "Send";
WorkerSendPayloadOp2[WorkerSendPayloadOp2["SessionInfoResponse"] = 3] = "SessionInfoResponse";
WorkerSendPayloadOp2[WorkerSendPayloadOp2["ShardIdentifyResponse"] = 4] = "ShardIdentifyResponse";
WorkerSendPayloadOp2[WorkerSendPayloadOp2["FetchStatus"] = 5] = "FetchStatus";
return WorkerSendPayloadOp2;
})(WorkerSendPayloadOp || {});
var WorkerReceivePayloadOp = /* @__PURE__ */ ((WorkerReceivePayloadOp2) => {
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["Connected"] = 0] = "Connected";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["Destroyed"] = 1] = "Destroyed";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["Event"] = 2] = "Event";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["RetrieveSessionInfo"] = 3] = "RetrieveSessionInfo";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["UpdateSessionInfo"] = 4] = "UpdateSessionInfo";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["WaitForIdentify"] = 5] = "WaitForIdentify";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["FetchStatusResponse"] = 6] = "FetchStatusResponse";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["WorkerReady"] = 7] = "WorkerReady";
WorkerReceivePayloadOp2[WorkerReceivePayloadOp2["CancelIdentify"] = 8] = "CancelIdentify";
return WorkerReceivePayloadOp2;
})(WorkerReceivePayloadOp || {});
var WorkerShardingStrategy = class {
static {
__name(this, "WorkerShardingStrategy");
}
manager;
options;
#workers = [];
#workerByShardId = new Collection();
connectPromises = new Collection();
destroyPromises = new Collection();
fetchStatusPromises = new Collection();
waitForIdentifyControllers = new Collection();
throttler;
constructor(manager, options) {
this.manager = manager;
this.options = options;
}
/**
* {@inheritDoc IShardingStrategy.spawn}
*/
async spawn(shardIds) {
const shardsPerWorker = this.options.shardsPerWorker === "all" ? shardIds.length : this.options.shardsPerWorker;
const strategyOptions = await managerToFetchingStrategyOptions(this.manager);
const loops = Math.ceil(shardIds.length / shardsPerWorker);
const promises = [];
for (let idx = 0; idx < loops; idx++) {
const slice = shardIds.slice(idx * shardsPerWorker, (idx + 1) * shardsPerWorker);
const workerData2 = {
...strategyOptions,
shardIds: slice
};
promises.push(this.setupWorker(workerData2));
}
await Promise.all(promises);
}
/**
* {@inheritDoc IShardingStrategy.connect}
*/
async connect() {
const promises = [];
for (const [shardId, worker] of this.#workerByShardId.entries()) {
const payload = {
op: 0 /* Connect */,
shardId
};
const promise = new Promise((resolve2) => this.connectPromises.set(shardId, resolve2));
worker.postMessage(payload);
promises.push(promise);
}
await Promise.all(promises);
}
/**
* {@inheritDoc IShardingStrategy.destroy}
*/
async destroy(options = {}) {
const promises = [];
for (const [shardId, worker] of this.#workerByShardId.entries()) {
const payload = {
op: 1 /* Destroy */,
shardId,
options
};
promises.push(
// eslint-disable-next-line no-promise-executor-return, promise/prefer-await-to-then
new Promise((resolve2) => this.destroyPromises.set(shardId, resolve2)).then(async () => worker.terminate())
);
worker.postMessage(payload);
}
this.#workers = [];
this.#workerByShardId.clear();
await Promise.all(promises);
}
/**
* {@inheritDoc IShardingStrategy.send}
*/
send(shardId, data) {
const worker = this.#workerByShardId.get(shardId);
if (!worker) {
throw new Error(`No worker found for shard ${shardId}`);
}
const payload = {
op: 2 /* Send */,
shardId,
payload: data
};
worker.postMessage(payload);
}
/**
* {@inheritDoc IShardingStrategy.fetchStatus}
*/
async fetchStatus() {
const statuses = new Collection();
for (const [shardId, worker] of this.#workerByShardId.entries()) {
const nonce = Math.random();
const payload = {
op: 5 /* FetchStatus */,
shardId,
nonce
};
const promise = new Promise((resolve2) => this.fetchStatusPromises.set(nonce, resolve2));
worker.postMessage(payload);
const status = await promise;
statuses.set(shardId, status);
}
return statuses;
}
async setupWorker(workerData2) {
const worker = new Worker(this.resolveWorkerPath(), { workerData: workerData2 });
await once(worker, "online");
await this.waitForWorkerReady(worker);
worker.on("error", (err) => {
throw err;
}).on("messageerror", (err) => {
throw err;
}).on("message", async (payload) => {
if ("op" in payload) {
await this.onMessage(worker, payload);
} else {
await this.options.unknownPayloadHandler?.(payload);
}
});
this.#workers.push(worker);
for (const shardId of workerData2.shardIds) {
this.#workerByShardId.set(shardId, worker);
}
}
resolveWorkerPath() {
const path2 = this.options.workerPath;
if (!path2) {
return join(__dirname, "defaultWorker.js");
}
if (isAbsolute(path2)) {
return path2;
}
if (/^\.\.?[/\\]/.test(path2)) {
return resolve(path2);
}
try {
return __require.resolve(path2);
} catch {
return resolve(path2);
}
}
async waitForWorkerReady(worker) {
return new Promise((resolve2) => {
const handler = /* @__PURE__ */ __name((payload) => {
if (payload.op === 7 /* WorkerReady */) {
resolve2();
worker.off("message", handler);
}
}, "handler");
worker.on("message", handler);
});
}
async onMessage(worker, payload) {
switch (payload.op) {
case 0 /* Connected */: {
this.connectPromises.get(payload.shardId)?.();
this.connectPromises.delete(payload.shardId);
break;
}
case 1 /* Destroyed */: {
this.destroyPromises.get(payload.shardId)?.();
this.destroyPromises.delete(payload.shardId);
break;
}
case 2 /* Event */: {
this.manager.emit(payload.event, { ...payload.data, shardId: payload.shardId });
break;
}
case 3 /* RetrieveSessionInfo */: {
const session = await this.manager.options.retrieveSessionInfo(payload.shardId);
const response = {
op: 3 /* SessionInfoResponse */,
nonce: payload.nonce,
session
};
worker.postMessage(response);
break;
}
case 4 /* UpdateSessionInfo */: {
await this.manager.options.updateSessionInfo(payload.shardId, payload.session);
break;
}
case 5 /* WaitForIdentify */: {
const throttler = await this.ensureThrottler();
try {
const controller = new AbortController();
this.waitForIdentifyControllers.set(payload.nonce, controller);
await throttler.waitForIdentify(payload.shardId, controller.signal);
} catch {
return;
}
const response = {
op: 4 /* ShardIdentifyResponse */,
nonce: payload.nonce,
ok: true
};
worker.postMessage(response);
break;
}
case 6 /* FetchStatusResponse */: {
this.fetchStatusPromises.get(payload.nonce)?.(payload.status);
this.fetchStatusPromises.delete(payload.nonce);
break;
}
case 7 /* WorkerReady */: {
break;
}
case 8 /* CancelIdentify */: {
this.waitForIdentifyControllers.get(payload.nonce)?.abort();
this.waitForIdentifyControllers.delete(payload.nonce);
const response = {
op: 4 /* ShardIdentifyResponse */,
nonce: payload.nonce,
ok: false
};
worker.postMessage(response);
break;
}
default: {
await this.options.unknownPayloadHandler?.(payload);
break;
}
}
}
async ensureThrottler() {
this.throttler ??= await this.manager.options.buildIdentifyThrottler(this.manager);
return this.throttler;
}
};
// src/strategies/context/WorkerContextFetchingStrategy.ts
var WorkerContextFetchingStrategy = class {
constructor(options) {
this.options = options;
if (isMainThread) {
throw new Error("Cannot instantiate WorkerContextFetchingStrategy on the main thread");
}
parentPort.on("message", (payload) => {
if (payload.op === 3 /* SessionInfoResponse */) {
this.sessionPromises.get(payload.nonce)?.(payload.session);
this.sessionPromises.delete(payload.nonce);
}
if (payload.op === 4 /* ShardIdentifyResponse */) {
const promise = this.waitForIdentifyPromises.get(payload.nonce);
if (payload.ok) {
promise?.resolve();
} else {
promise?.reject(promise.signal.reason);
}
this.waitForIdentifyPromises.delete(payload.nonce);
}
});
}
static {
__name(this, "WorkerContextFetchingStrategy");
}
sessionPromises = new Collection2();
waitForIdentifyPromises = new Collection2();
async retrieveSessionInfo(shardId) {
const nonce = Math.random();
const payload = {
op: 3 /* RetrieveSessionInfo */,
shardId,
nonce
};
const promise = new Promise((resolve2) => this.sessionPromises.set(nonce, resolve2));
parentPort.postMessage(payload);
return promise;
}
updateSessionInfo(shardId, sessionInfo) {
const payload = {
op: 4 /* UpdateSessionInfo */,
shardId,
session: sessionInfo
};
parentPort.postMessage(payload);
}
async waitForIdentify(shardId, signal) {
const nonce = Math.random();
const payload = {
op: 5 /* WaitForIdentify */,
nonce,
shardId
};
const promise = new Promise(
(resolve2, reject) => (
// eslint-disable-next-line no-promise-executor-return
this.waitForIdentifyPromises.set(nonce, { signal, resolve: resolve2, reject })
)
);
parentPort.postMessage(payload);
const listener = /* @__PURE__ */ __name(() => {
const payload2 = {
op: 8 /* CancelIdentify */,
nonce
};
parentPort.postMessage(payload2);
}, "listener");
signal.addEventListener("abort", listener);
try {
await promise;
} finally {
signal.removeEventListener("abort", listener);
}
}
};
// src/strategies/sharding/SimpleShardingStrategy.ts
import { Collection as Collection6 } from "@discordjs/collection";
// src/ws/WebSocketShard.ts
import { Buffer as Buffer2 } from "node:buffer";
import { once as once2 } from "node:events";
import { clearInterval, clearTimeout, setInterval, setTimeout } from "node:timers";
import { setTimeout as sleep2 } from "node:timers/promises";
import { URLSearchParams } from "node:url";
import { TextDecoder } from "node:util";
import { inflate } from "node:zlib";
import { Collection as Collection5 } from "@discordjs/collection";
import { lazy as lazy2, shouldUseGlobalFetchAndWebSocket } from "@discordjs/util";
import { AsyncQueue as AsyncQueue2 } from "@sapphire/async-queue";
import { AsyncEventEmitter } from "@vladfrangu/async_event_emitter";
import {
GatewayCloseCodes,
GatewayDispatchEvents,
GatewayOpcodes as GatewayOpcodes2
} from "discord-api-types/v10";
import { WebSocket } from "ws";
// src/utils/constants.ts
import process from "node:process";
import { Collection as Collection4 } from "@discordjs/collection";
import { lazy } from "@discordjs/util";
import { APIVersion, GatewayOpcodes } from "discord-api-types/v10";
// src/throttling/SimpleIdentifyThrottler.ts
import { setTimeout as sleep } from "node:timers/promises";
import { Collection as Collection3 } from "@discordjs/collection";
import { AsyncQueue } from "@sapphire/async-queue";
var SimpleIdentifyThrottler = class {
constructor(maxConcurrency) {
this.maxConcurrency = maxConcurrency;
}
static {
__name(this, "SimpleIdentifyThrottler");
}
states = new Collection3();
/**
* {@inheritDoc IIdentifyThrottler.waitForIdentify}
*/
async waitForIdentify(shardId, signal) {
const key = shardId % this.maxConcurrency;
const state = this.states.ensure(key, () => {
return {
queue: new AsyncQueue(),
resetsAt: Number.POSITIVE_INFINITY
};
});
await state.queue.wait({ signal });
try {
const diff = state.resetsAt - Date.now();
if (diff <= 5e3) {
const time = diff + Math.random() * 1500;
await sleep(time);
}
state.resetsAt = Date.now() + 5e3;
} finally {
state.queue.shift();
}
}
};
// src/utils/constants.ts
var Encoding = /* @__PURE__ */ ((Encoding2) => {
Encoding2["JSON"] = "json";
return Encoding2;
})(Encoding || {});
var CompressionMethod = /* @__PURE__ */ ((CompressionMethod2) => {
CompressionMethod2["ZlibStream"] = "zlib-stream";
return CompressionMethod2;
})(CompressionMethod || {});
var DefaultDeviceProperty = `@discordjs/ws 1.1.0`;
var getDefaultSessionStore = lazy(() => new Collection4());
var DefaultWebSocketManagerOptions = {
async buildIdentifyThrottler(manager) {
const info = await manager.fetchGatewayInformation();
return new SimpleIdentifyThrottler(info.session_start_limit.max_concurrency);
},
buildStrategy: (manager) => new SimpleShardingStrategy(manager),
shardCount: null,
shardIds: null,
largeThreshold: null,
initialPresence: null,
identifyProperties: {
browser: DefaultDeviceProperty,
device: DefaultDeviceProperty,
os: process.platform
},
version: APIVersion,
encoding: "json" /* JSON */,
compression: null,
retrieveSessionInfo(shardId) {
const store = getDefaultSessionStore();
return store.get(shardId) ?? null;
},
updateSessionInfo(shardId, info) {
const store = getDefaultSessionStore();
if (info) {
store.set(shardId, info);
} else {
store.delete(shardId);
}
},
handshakeTimeout: 3e4,
helloTimeout: 6e4,
readyTimeout: 15e3
};
var ImportantGatewayOpcodes = /* @__PURE__ */ new Set([
GatewayOpcodes.Heartbeat,
GatewayOpcodes.Identify,
GatewayOpcodes.Resume
]);
function getInitialSendRateLimitState() {
return {
sent: 0,
resetAt: Date.now() + 6e4
};
}
__name(getInitialSendRateLimitState, "getInitialSendRateLimitState");
// src/ws/WebSocketShard.ts
var getZlibSync = lazy2(async () => import("zlib-sync").then((mod) => mod.default).catch(() => null));
var WebSocketShardEvents = /* @__PURE__ */ ((WebSocketShardEvents2) => {
WebSocketShardEvents2["Closed"] = "closed";
WebSocketShardEvents2["Debug"] = "debug";
WebSocketShardEvents2["Dispatch"] = "dispatch";
WebSocketShardEvents2["Error"] = "error";
WebSocketShardEvents2["HeartbeatComplete"] = "heartbeat";
WebSocketShardEvents2["Hello"] = "hello";
WebSocketShardEvents2["Ready"] = "ready";
WebSocketShardEvents2["Resumed"] = "resumed";
return WebSocketShardEvents2;
})(WebSocketShardEvents || {});
var WebSocketShardStatus = /* @__PURE__ */ ((WebSocketShardStatus2) => {
WebSocketShardStatus2[WebSocketShardStatus2["Idle"] = 0] = "Idle";
WebSocketShardStatus2[WebSocketShardStatus2["Connecting"] = 1] = "Connecting";
WebSocketShardStatus2[WebSocketShardStatus2["Resuming"] = 2] = "Resuming";
WebSocketShardStatus2[WebSocketShardStatus2["Ready"] = 3] = "Ready";
return WebSocketShardStatus2;
})(WebSocketShardStatus || {});
var WebSocketShardDestroyRecovery = /* @__PURE__ */ ((WebSocketShardDestroyRecovery2) => {
WebSocketShardDestroyRecovery2[WebSocketShardDestroyRecovery2["Reconnect"] = 0] = "Reconnect";
WebSocketShardDestroyRecovery2[WebSocketShardDestroyRecovery2["Resume"] = 1] = "Resume";
return WebSocketShardDestroyRecovery2;
})(WebSocketShardDestroyRecovery || {});
var CloseCodes = /* @__PURE__ */ ((CloseCodes2) => {
CloseCodes2[CloseCodes2["Normal"] = 1e3] = "Normal";
CloseCodes2[CloseCodes2["Resuming"] = 4200] = "Resuming";
return CloseCodes2;
})(CloseCodes || {});
var WebSocketConstructor = shouldUseGlobalFetchAndWebSocket() ? globalThis.WebSocket : WebSocket;
var WebSocketShard = class extends AsyncEventEmitter {
static {
__name(this, "WebSocketShard");
}
connection = null;
useIdentifyCompress = false;
inflate = null;
textDecoder = new TextDecoder();
replayedEvents = 0;
isAck = true;
sendRateLimitState = getInitialSendRateLimitState();
initialHeartbeatTimeoutController = null;
heartbeatInterval = null;
lastHeartbeatAt = -1;
// Indicates whether the shard has already resolved its original connect() call
initialConnectResolved = false;
// Indicates if we failed to connect to the ws url (ECONNREFUSED/ECONNRESET)
failedToConnectDueToNetworkError = false;
sendQueue = new AsyncQueue2();
timeoutAbortControllers = new Collection5();
strategy;
id;
#status = 0 /* Idle */;
get status() {
return this.#status;
}
constructor(strategy, id) {
super();
this.strategy = strategy;
this.id = id;
}
async connect() {
const controller = new AbortController();
let promise;
if (!this.initialConnectResolved) {
promise = Promise.race([
once2(this, "ready" /* Ready */, { signal: controller.signal }),
once2(this, "resumed" /* Resumed */, { signal: controller.signal })
]);
}
void this.internalConnect();
try {
await promise;
} catch ({ error }) {
throw error;
} finally {
controller.abort();
}
this.initialConnectResolved = true;
}
async internalConnect() {
if (this.#status !== 0 /* Idle */) {
throw new Error("Tried to connect a shard that wasn't idle");
}
const { version: version2, encoding, compression } = this.strategy.options;
const params = new URLSearchParams({ v: version2, encoding });
if (compression) {
const zlib = await getZlibSync();
if (zlib) {
params.append("compress", compression);
this.inflate = new zlib.Inflate({
chunkSize: 65535,
to: "string"
});
} else if (!this.useIdentifyCompress) {
this.useIdentifyCompress = true;
console.warn(
"WebSocketShard: Compression is enabled but zlib-sync is not installed, falling back to identify compress"
);
}
}
const session = await this.strategy.retrieveSessionInfo(this.id);
const url = `${session?.resumeURL ?? this.strategy.options.gatewayInformation.url}?${params.toString()}`;
this.debug([`Connecting to ${url}`]);
const connection = new WebSocketConstructor(url, {
handshakeTimeout: this.strategy.options.handshakeTimeout ?? void 0
});
connection.binaryType = "arraybuffer";
connection.onmessage = (event) => {
void this.onMessage(event.data, event.data instanceof ArrayBuffer);
};
connection.onerror = (event) => {
this.onError(event.error);
};
connection.onclose = (event) => {
void this.onClose(event.code);
};
connection.onopen = () => {
this.sendRateLimitState = getInitialSendRateLimitState();
};
this.connection = connection;
this.#status = 1 /* Connecting */;
const { ok } = await this.waitForEvent("hello" /* Hello */, this.strategy.options.helloTimeout);
if (!ok) {
return;
}
if (session?.shardCount === this.strategy.options.shardCount) {
await this.resume(session);
} else {
await this.identify();
}
}
async destroy(options = {}) {
if (this.#status === 0 /* Idle */) {
this.debug(["Tried to destroy a shard that was idle"]);
return;
}
if (!options.code) {
options.code = options.recover === 1 /* Resume */ ? 4200 /* Resuming */ : 1e3 /* Normal */;
}
this.debug([
"Destroying shard",
`Reason: ${options.reason ?? "none"}`,
`Code: ${options.code}`,
`Recover: ${options.recover === void 0 ? "none" : WebSocketShardDestroyRecovery[options.recover]}`
]);
this.isAck = true;
if (this.heartbeatInterval) {
clearInterval(this.heartbeatInterval);
}
if (this.initialHeartbeatTimeoutController) {
this.initialHeartbeatTimeoutController.abort();
this.initialHeartbeatTimeoutController = null;
}
this.lastHeartbeatAt = -1;
for (const controller of this.timeoutAbortControllers.values()) {
controller.abort();
}
this.timeoutAbortControllers.clear();
this.failedToConnectDueToNetworkError = false;
if (options.recover !== 1 /* Resume */) {
await this.strategy.updateSessionInfo(this.id, null);
}
if (this.connection) {
this.connection.onmessage = null;
this.connection.onclose = null;
const shouldClose = this.connection.readyState === WebSocket.OPEN;
this.debug([
"Connection status during destroy",
`Needs closing: ${shouldClose}`,
`Ready state: ${this.connection.readyState}`
]);
if (shouldClose) {
let outerResolve;
const promise = new Promise((resolve2) => {
outerResolve = resolve2;
});
this.connection.onclose = outerResolve;
this.connection.close(options.code, options.reason);
await promise;
this.emit("closed" /* Closed */, { code: options.code });
}
this.connection.onerror = null;
} else {
this.debug(["Destroying a shard that has no connection; please open an issue on GitHub"]);
}
this.#status = 0 /* Idle */;
if (options.recover !== void 0) {
await sleep2(500);
return this.internalConnect();
}
}
async waitForEvent(event, timeoutDuration) {
this.debug([`Waiting for event ${event} ${timeoutDuration ? `for ${timeoutDuration}ms` : "indefinitely"}`]);
const timeoutController = new AbortController();
const timeout = timeoutDuration ? setTimeout(() => timeoutController.abort(), timeoutDuration).unref() : null;
this.timeoutAbortControllers.set(event, timeoutController);
const closeController = new AbortController();
try {
const closed = await Promise.race([
once2(this, event, { signal: timeoutController.signal }).then(() => false),
once2(this, "closed" /* Closed */, { signal: closeController.signal }).then(() => true)
]);
return { ok: !closed };
} catch {
void this.destroy({
code: 1e3 /* Normal */,
reason: "Something timed out or went wrong while waiting for an event",
recover: 0 /* Reconnect */
});
return { ok: false };
} finally {
if (timeout) {
clearTimeout(timeout);
}
this.timeoutAbortControllers.delete(event);
if (!closeController.signal.aborted) {
closeController.abort();
}
}
}
async send(payload) {
if (!this.connection) {
throw new Error("WebSocketShard wasn't connected");
}
if (ImportantGatewayOpcodes.has(payload.op)) {
this.connection.send(JSON.stringify(payload));
return;
}
if (this.#status !== 3 /* Ready */ && !ImportantGatewayOpcodes.has(payload.op)) {
this.debug(["Tried to send a non-crucial payload before the shard was ready, waiting"]);
try {
await once2(this, "ready" /* Ready */);
} catch {
return this.send(payload);
}
}
await this.sendQueue.wait();
const now = Date.now();
if (now >= this.sendRateLimitState.resetAt) {
this.sendRateLimitState = getInitialSendRateLimitState();
}
if (this.sendRateLimitState.sent + 1 >= 115) {
const sleepFor = this.sendRateLimitState.resetAt - now + Math.random() * 1500;
this.debug([`Was about to hit the send rate limit, sleeping for ${sleepFor}ms`]);
const controller = new AbortController();
const interrupted = await Promise.race([
sleep2(sleepFor).then(() => false),
once2(this, "closed" /* Closed */, { signal: controller.signal }).then(() => true)
]);
if (interrupted) {
this.debug(["Connection closed while waiting for the send rate limit to reset, re-queueing payload"]);
this.sendQueue.shift();
return this.send(payload);
}
controller.abort();
}
this.sendRateLimitState.sent++;
this.sendQueue.shift();
this.connection.send(JSON.stringify(payload));
}
async identify() {
this.debug(["Waiting for identify throttle"]);
const controller = new AbortController();
const closeHandler = /* @__PURE__ */ __name(() => {
controller.abort();
}, "closeHandler");
this.on("closed" /* Closed */, closeHandler);
try {
await this.strategy.waitForIdentify(this.id, controller.signal);
} catch {
if (controller.signal.aborted) {
this.debug(["Was waiting for an identify, but the shard closed in the meantime"]);
return;
}
this.debug([
"IContextFetchingStrategy#waitForIdentify threw an unknown error.",
"If you're using a custom strategy, this is probably nothing to worry about.",
"If you're not, please open an issue on GitHub."
]);
await this.destroy({
reason: "Identify throttling logic failed",
recover: 1 /* Resume */
});
} finally {
this.off("closed" /* Closed */, closeHandler);
}
this.debug([
"Identifying",
`shard id: ${this.id.toString()}`,
`shard count: ${this.strategy.options.shardCount}`,
`intents: ${this.strategy.options.intents}`,
`compression: ${this.inflate ? "zlib-stream" : this.useIdentifyCompress ? "identify" : "none"}`
]);
const d = {
token: this.strategy.options.token,
properties: this.strategy.options.identifyProperties,
intents: this.strategy.options.intents,
compress: this.useIdentifyCompress,
shard: [this.id, this.strategy.options.shardCount]
};
if (this.strategy.options.largeThreshold) {
d.large_threshold = this.strategy.options.largeThreshold;
}
if (this.strategy.options.initialPresence) {
d.presence = this.strategy.options.initialPresence;
}
await this.send({
op: GatewayOpcodes2.Identify,
d
});
await this.waitForEvent("ready" /* Ready */, this.strategy.options.readyTimeout);
}
async resume(session) {
this.debug([
"Resuming session",
`resume url: ${session.resumeURL}`,
`sequence: ${session.sequence}`,
`shard id: ${this.id.toString()}`
]);
this.#status = 2 /* Resuming */;
this.replayedEvents = 0;
return this.send({
op: GatewayOpcodes2.Resume,
d: {
token: this.strategy.options.token,
seq: session.sequence,
session_id: session.sessionId
}
});
}
async heartbeat(requested = false) {
if (!this.isAck && !requested) {
return this.destroy({ reason: "Zombie connection", recover: 1 /* Resume */ });
}
const session = await this.strategy.retrieveSessionInfo(this.id);
await this.send({
op: GatewayOpcodes2.Heartbeat,
d: session?.sequence ?? null
});
this.lastHeartbeatAt = Date.now();
this.isAck = false;
}
async unpackMessage(data, isBinary) {
if (!isBinary) {
try {
return JSON.parse(data);
} catch {
return null;
}
}
const decompressable = new Uint8Array(data);
if (this.useIdentifyCompress) {
return new Promise((resolve2, reject) => {
inflate(decompressable, { chunkSize: 65535 }, (err, result) => {
if (err) {
reject(err);
return;
}
resolve2(JSON.parse(this.textDecoder.decode(result)));
});
});
}
if (this.inflate) {
const l = decompressable.length;
const flush = l >= 4 && decompressable[l - 4] === 0 && decompressable[l - 3] === 0 && decompressable[l - 2] === 255 && decompressable[l - 1] === 255;
const zlib = await getZlibSync();
this.inflate.push(Buffer2.from(decompressable), flush ? zlib.Z_SYNC_FLUSH : zlib.Z_NO_FLUSH);
if (this.inflate.err) {
this.emit("error" /* Error */, {
error: new Error(`${this.inflate.err}${this.inflate.msg ? `: ${this.inflate.msg}` : ""}`)
});
}
if (!flush) {
return null;
}
const { result } = this.inflate;
if (!result) {
return null;
}
return JSON.parse(typeof result === "string" ? result : this.textDecoder.decode(result));
}
this.debug([
"Received a message we were unable to decompress",
`isBinary: ${isBinary.toString()}`,
`useIdentifyCompress: ${this.useIdentifyCompress.toString()}`,
`inflate: ${Boolean(this.inflate).toString()}`
]);
return null;
}
async onMessage(data, isBinary) {
const payload = await this.unpackMessage(data, isBinary);
if (!payload) {
return;
}
switch (payload.op) {
case GatewayOpcodes2.Dispatch: {
if (this.#status === 2 /* Resuming */) {
this.replayedEvents++;
}
switch (payload.t) {
case GatewayDispatchEvents.Ready: {
this.#status = 3 /* Ready */;
const session2 = {
sequence: payload.s,
sessionId: payload.d.session_id,
shardId: this.id,
shardCount: this.strategy.options.shardCount,
resumeURL: payload.d.resume_gateway_url
};
await this.strategy.updateSessionInfo(this.id, session2);
this.emit("ready" /* Ready */, { data: payload.d });
break;
}
case GatewayDispatchEvents.Resumed: {
this.#status = 3 /* Ready */;
this.debug([`Resumed and replayed ${this.replayedEvents} events`]);
this.emit("resumed" /* Resumed */);
break;
}
default: {
break;
}
}
const session = await this.strategy.retrieveSessionInfo(this.id);
if (session) {
if (payload.s > session.sequence) {
await this.strategy.updateSessionInfo(this.id, { ...session, sequence: payload.s });
}
} else {
this.debug([
`Received a ${payload.t} event but no session is available. Session information cannot be re-constructed in this state without a full reconnect`
]);
}
this.emit("dispatch" /* Dispatch */, { data: payload });
break;
}
case GatewayOpcodes2.Heartbeat: {
await this.heartbeat(true);
break;
}
case GatewayOpcodes2.Reconnect: {
await this.destroy({
reason: "Told to reconnect by Discord",
recover: 1 /* Resume */
});
break;
}
case GatewayOpcodes2.InvalidSession: {
this.debug([`Invalid session; will attempt to resume: ${payload.d.toString()}`]);
const session = await this.strategy.retrieveSessionInfo(this.id);
if (payload.d && session) {
await this.resume(session);
} else {
await this.destroy({
reason: "Invalid session",
recover: 0 /* Reconnect */
});
}
break;
}
case GatewayOpcodes2.Hello: {
this.emit("hello" /* Hello */);
const jitter = Math.random();
const firstWait = Math.floor(payload.d.heartbeat_interval * jitter);
this.debug([`Preparing first heartbeat of the connection with a jitter of ${jitter}; waiting ${firstWait}ms`]);
try {
const controller = new AbortController();
this.initialHeartbeatTimeoutController = controller;
await sleep2(firstWait, void 0, { signal: controller.signal });
} catch {
this.debug(["Cancelled initial heartbeat due to #destroy being called"]);
return;
} finally {
this.initialHeartbeatTimeoutController = null;
}
await this.heartbeat();
this.debug([`First heartbeat sent, starting to beat every ${payload.d.heartbeat_interval}ms`]);
this.heartbeatInterval = setInterval(() => void this.heartbeat(), payload.d.heartbeat_interval);
break;
}
case GatewayOpcodes2.HeartbeatAck: {
this.isAck = true;
const ackAt = Date.now();
this.emit("heartbeat" /* HeartbeatComplete */, {
ackAt,
heartbeatAt: this.lastHeartbeatAt,
latency: ackAt - this.lastHeartbeatAt
});
break;
}
}
}
onError(error) {
if ("code" in error && ["ECONNRESET", "ECONNREFUSED"].includes(error.code)) {
this.debug(["Failed to connect to the gateway URL specified due to a network error"]);
this.failedToConnectDueToNetworkError = true;
return;
}
this.emit("error" /* Error */, { error });
}
async onClose(code) {
this.emit("closed" /* Closed */, { code });
switch (code) {
case 1e3 /* Normal */: {
return this.destroy({
code,
reason: "Got disconnected by Discord",
recover: 0 /* Reconnect */
});
}
case 4200 /* Resuming */: {
break;
}
case GatewayCloseCodes.UnknownError: {
this.debug([`An unknown error occurred: ${code}`]);
return this.destroy({ code, recover: 1 /* Resume */ });
}
case GatewayCloseCodes.UnknownOpcode: {
this.debug(["An invalid opcode was sent to Discord."]);
return this.destroy({ code, recover: 1 /* Resume */ });
}
case GatewayCloseCodes.DecodeError: {
this.debug(["An invalid payload was sent to Discord."]);
return this.destroy({ code, recover: 1 /* Resume */ });
}
case GatewayCloseCodes.NotAuthenticated: {
this.debug(["A request was somehow sent before the identify/resume payload."]);
return this.destroy({ code, recover: 0 /* Reconnect */ });
}
case GatewayCloseCodes.AuthenticationFailed: {
this.emit("error" /* Error */, {
error: new Error("Authentication failed")
});
return this.destroy({ code });
}
case GatewayCloseCodes.AlreadyAuthenticated: {
this.debug(["More than one auth payload was sent."]);
return this.destroy({ code, recover: 0 /* Reconnect */ });
}
case GatewayCloseCodes.InvalidSeq: {
this.debug(["An invalid sequence was sent."]);
return this.destroy({ code, recover: 0 /* Reconnect */ });
}
case GatewayCloseCodes.RateLimited: {
this.debug(["The WebSocket rate limit has been hit, this should never happen"]);
return this.destroy({ code, recover: 0 /* Reconnect */ });
}
case GatewayCloseCodes.SessionTimedOut: {
this.debug(["Session timed out."]);
return this.destroy({ code, recover: 1 /* Resume */ });
}
case GatewayCloseCodes.InvalidShard: {
this.emit("error" /* Error */, {
error: new Error("Invalid shard")
});
return this.destroy({ code });
}
case GatewayCloseCodes.ShardingRequired: {
this.emit("error" /* Error */, {
error: new Error("Sharding is required")
});
return this.destroy({ code });
}
case GatewayCloseCodes.InvalidAPIVersion: {
this.emit("error" /* Error */, {
error: new Error("Used an invalid API version")
});
return this.destroy({ code });
}
case GatewayCloseCodes.InvalidIntents: {
this.emit("error" /* Error */, {
error: new Error("Used invalid intents")
});
return this.destroy({ code });
}
case GatewayCloseCodes.DisallowedIntents: {
this.emit("error" /* Error */, {
error: new Error("Used disallowed intents")
});
return this.destroy({ code });
}
default: {
this.debug([
`The gateway closed with an unexpected code ${code}, attempting to ${this.failedToConnectDueToNetworkError ? "reconnect" : "resume"}.`
]);
return this.destroy({
code,
recover: this.failedToConnectDueToNetworkError ? 0 /* Reconnect */ : 1 /* Resume */
});
}
}
}
debug(messages) {
const message = `${messages[0]}${messages.length > 1 ? `
${messages.slice(1).map((m) => ` ${m}`).join("\n")}` : ""}`;
this.emit("debug" /* Debug */, { message });
}
};
// src/strategies/sharding/SimpleShardingStrategy.ts
var SimpleShardingStrategy = class {
static {
__name(this, "SimpleShardingStrategy");
}
manager;
shards = new Collection6();
constructor(manager) {
this.manager = manager;
}
/**
* {@inheritDoc IShardingStrategy.spawn}
*/
async spawn(shardIds) {
const strategyOptions = await managerToFetchingStrategyOptions(this.manager);
for (const shardId of shardIds) {
const strategy = new SimpleContextFetchingStrategy(this.manager, strategyOptions);
const shard = new WebSocketShard(strategy, shardId);
for (const event of Object.values(WebSocketShardEvents)) {
shard.on(event, (payload) => this.manager.emit(event, { ...payload, shardId }));
}
this.shards.set(shardId, shard);
}
}
/**
* {@inheritDoc IShardingStrategy.connect}
*/
async connect() {
const promises = [];
for (const shard of this.shards.values()) {
promises.push(shard.connect());
}
await Promise.all(promises);
}
/**
* {@inheritDoc IShardingStrategy.destroy}
*/
async destroy(options) {
const promises = [];
for (const shard of this.shards.values()) {
promises.push(shard.destroy(options));
}
await Promise.all(promises);
this.shards.clear();
}
/**
* {@inheritDoc IShardingStrategy.send}
*/
async send(shardId, payload) {
const shard = this.shards.get(shardId);
if (!shard) {
throw new RangeError(`Shard ${shardId} not found`);
}
return shard.send(payload);
}
/**
* {@inheritDoc IShardingStrategy.fetchStatus}
*/
async fetchStatus() {
return this.shards.mapValues((shard) => shard.status);
}
};
// src/utils/WorkerBootstrapper.ts
import { isMainThread as isMainThread2, parentPort as parentPort2, workerData } from "node:worker_threads";
import { Collection as Collection7 } from "@discordjs/collection";
var WorkerBootstrapper = class {
static {
__name(this, "WorkerBootstrapper");
}
/**
* The data passed to the worker thread
*/
data = workerData;
/**
* The shards that are managed by this worker
*/
shards = new Collection7();
constructor() {
if (isMainThread2) {
throw new Error("Expected WorkerBootstrap to not be used within the main thread");
}
}
/**
* Helper method to initiate a shard's connection process
*/
async connect(shardId) {
const shard = this.shards.get(shardId);
if (!shard) {
throw new RangeError(`Shard ${shardId} does not exist`);
}
await shard.connect();
}
/**
* Helper method to destroy a shard
*/
async destroy(shardId, options) {
const shard = this.shards.get(shardId);
if (!shard) {
throw new RangeError(`Shard ${shardId} does not exist`);
}
await shard.destroy(options);
}
/**
* Helper method to attach event listeners to the parentPort
*/
setupThreadEvents() {
parentPort2.on("messageerror", (err) => {
throw err;
}).on("message", async (payload) => {
switch (payload.op) {
case 0 /* Connect */: {
await this.connect(payload.shardId);
const response = {
op: 0 /* Connected */,
shardId: payload.shardId
};
parentPort2.postMessage(response);
break;
}
case 1 /* Destroy */: {
await this.destroy(payload.shardId, payload.options);
const response = {
op: 1 /* Destroyed */,
shardId: payload.shardId
};
parentPort2.postMessage(response);
break;
}
case 2 /* Send */: {
const shard = this.shards.get(payload.shardId);
if (!shard) {
throw new RangeError(`Shard ${payload.shardId} does not exist`);
}
await shard.send(payload.payload);
break;
}
case 3 /* SessionInfoResponse */: {
break;
}
case 4 /* ShardIdentifyResponse */: {
break;
}
case 5 /* FetchStatus */: {
const shard = this.shards.get(payload.shardId);
if (!shard) {
throw new Error(`Shard ${payload.shardId} does not exist`);
}
const response = {
op: 6 /* FetchStatusResponse */,
status: shard.status,
nonce: payload.nonce
};
parentPort2.postMessage(response);
break;
}
}
});
}
/**
* Bootstraps the worker thread with the provided options
*/
async bootstrap(options = {}) {
for (const shardId of this.data.shardIds) {
const shard = new WebSocketShard(new WorkerContextFetchingStrategy(this.data), shardId);
for (const event of options.forwardEvents ?? Object.values(WebSocketShardEvents)) {
shard.on(event, (data) => {
const payload = {
op: 2 /* Event */,
event,
data,
shardId
};
parentPort2.postMessage(payload);
});
}
await options.shardCallback?.(shard);
this.shards.set(shardId, shard);
}
this.setupThreadEvents();
const message = {
op: 7 /* WorkerReady */
};
parentPort2.postMessage(message);
}
};
// src/ws/WebSocketManager.ts
import { range } from "@discordjs/util";
import { polyfillDispose } from "@discordjs/util";
import { AsyncEventEmitter as AsyncEventEmitter2 } from "@vladfrangu/async_event_emitter";
import {
Routes
} from "discord-api-types/v10";
polyfillDispose();
var WebSocketManager = class extends AsyncEventEmitter2 {
static {
__name(this, "WebSocketManager");
}
/**
* The options being used by this manager
*/
options;
/**
* Internal cache for a GET /gateway/bot result
*/
gatewayInformation = null;
/**
* Internal cache for the shard ids
*/
shardIds = null;
/**
* Strategy used to manage shards
*
* @defaultValue `SimpleShardingStrategy`
*/
strategy;
constructor(options) {
super();
this.options = { ...DefaultWebSocketManagerOptions, ...options };
this.strategy = this.options.buildStrategy(this);
}
/**
* Fetches the gateway information from Discord - or returns it from cache if available
*
* @param force - Whether to ignore the cache and force a fresh fetch
*/
async fetchGatewayInformation(force = false) {
if (this.gatewayInformation) {
if (this.gatewayInformation.expiresAt <= Date.now()) {
this.gatewayInformation = null;
} else if (!force) {
return this.gatewayInformation.data;
}
}
const data = await this.options.rest.get(Routes.gatewayBot());
this.gatewayInformation = { data, expiresAt: Date.now() + (data.session_start_limit.reset_after || 5e3) };
return this.gatewayInformation.data;
}
/**
* Updates your total shard count on-the-fly, spawning shards as needed
*
* @param shardCount - The new shard count to use
*/
async updateShardCount(shardCount) {
await this.strategy.destroy({ reason: "User is adjusting their shards" });
this.options.shardCount = shardCount;
const shardIds = await this.getShardIds(true);
await this.strategy.spawn(shardIds);
return this;
}
/**
* Yields the total number of shards across for your bot, accounting for Discord recommendations
*/
async getShardCount() {
if (this.options.shardCount) {
return this.options.shardCount;
}
const shardIds = await this.getShardIds();
return Math.max(...shardIds) + 1;
}
/**
* Yields the ids of the shards this manager should manage
*/
async getShardIds(force = false) {
if (this.shardIds && !force) {
return this.shardIds;
}
let shardIds;
if (this.options.shardIds) {
if (Array.isArray(this.options.shardIds)) {
shardIds = this.options.shardIds;
} else {
const { start, end } = this.options.shardIds;
shardIds = [...range({ start, end: end + 1 })];
}
} else {
const data = await this.fetchGatewayInformation();
shardIds = [...range(this.options.shardCount ?? data.shards)];
}
this.shardIds = shardIds;
return shardIds;
}
async connect() {
const shardCount = await this.getShardCount();
await this.updateShardCount(shardCount);
const shardIds = await this.getShardIds();
const data = await this.fetchGatewayInformation();
if (data.session_start_limit.remaining < shardIds.length) {
throw new Error(
`Not enough sessions remaining to spawn ${shardIds.length} shards; only ${data.session_start_limit.remaining} remaining; resets at ${new Date(Date.now() + data.session_start_limit.reset_after).toISOString()}`
);
}
await this.strategy.connect();
}
destroy(options) {
return this.strategy.destroy(options);
}
send(shardId, payload) {
return this.strategy.send(shardId, payload);
}
fetchStatus() {
return this.strategy.fetchStatus();
}
async [Symbol.asyncDispose]() {
await this.destroy();
}
};
// src/index.ts
var version = "1.1.0";
export {
CloseCodes,
CompressionMethod,
DefaultDeviceProperty,
DefaultWebSocketManagerOptions,
Encoding,
ImportantGatewayOpcodes,
SimpleContextFetchingStrategy,
SimpleIdentifyThrottler,
SimpleShardingStrategy,
WebSocketManager,
WebSocketShard,
WebSocketShardDestroyRecovery,
WebSocketShardEvents,
WebSocketShardStatus,
WorkerBootstrapper,
WorkerContextFetchingStrategy,
WorkerReceivePayloadOp,
WorkerSendPayloadOp,
WorkerShardingStrategy,
getInitialSendRateLimitState,
managerToFetchingStrategyOptions,
version
};
//# sourceMappingURL=index.mjs.map