93 lines
3.6 KiB
JavaScript
93 lines
3.6 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ParentNamespace = void 0;
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const namespace_1 = require("./namespace");
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const socket_io_adapter_1 = require("socket.io-adapter");
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const debug_1 = __importDefault(require("debug"));
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const debug = (0, debug_1.default)("socket.io:parent-namespace");
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/**
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* A parent namespace is a special {@link Namespace} that holds a list of child namespaces which were created either
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* with a regular expression or with a function.
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*
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* @example
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* const parentNamespace = io.of(/\/dynamic-\d+/);
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*
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* parentNamespace.on("connection", (socket) => {
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* const childNamespace = socket.nsp;
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* }
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*
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* // will reach all the clients that are in one of the child namespaces, like "/dynamic-101"
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* parentNamespace.emit("hello", "world");
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*
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*/
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class ParentNamespace extends namespace_1.Namespace {
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constructor(server) {
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super(server, "/_" + ParentNamespace.count++);
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this.children = new Set();
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}
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/**
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* @private
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*/
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_initAdapter() {
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this.adapter = new ParentBroadcastAdapter(this, this.children);
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}
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emit(ev, ...args) {
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this.children.forEach((nsp) => {
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nsp.emit(ev, ...args);
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});
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return true;
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}
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createChild(name) {
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debug("creating child namespace %s", name);
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const namespace = new namespace_1.Namespace(this.server, name);
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namespace._fns = this._fns.slice(0);
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this.listeners("connect").forEach((listener) => namespace.on("connect", listener));
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this.listeners("connection").forEach((listener) => namespace.on("connection", listener));
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this.children.add(namespace);
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if (this.server._opts.cleanupEmptyChildNamespaces) {
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const remove = namespace._remove;
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namespace._remove = (socket) => {
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remove.call(namespace, socket);
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if (namespace.sockets.size === 0) {
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debug("closing child namespace %s", name);
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namespace.adapter.close();
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this.server._nsps.delete(namespace.name);
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this.children.delete(namespace);
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}
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};
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}
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this.server._nsps.set(name, namespace);
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// @ts-ignore
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this.server.sockets.emitReserved("new_namespace", namespace);
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return namespace;
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}
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fetchSockets() {
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// note: we could make the fetchSockets() method work for dynamic namespaces created with a regex (by sending the
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// regex to the other Socket.IO servers, and returning the sockets of each matching namespace for example), but
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// the behavior for namespaces created with a function is less clear
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// note²: we cannot loop over each children namespace, because with multiple Socket.IO servers, a given namespace
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// may exist on one node but not exist on another (since it is created upon client connection)
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throw new Error("fetchSockets() is not supported on parent namespaces");
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}
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}
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exports.ParentNamespace = ParentNamespace;
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ParentNamespace.count = 0;
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/**
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* A dummy adapter that only supports broadcasting to child (concrete) namespaces.
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* @private file
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*/
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class ParentBroadcastAdapter extends socket_io_adapter_1.Adapter {
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constructor(parentNsp, children) {
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super(parentNsp);
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this.children = children;
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}
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broadcast(packet, opts) {
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this.children.forEach((nsp) => {
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nsp.adapter.broadcast(packet, opts);
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});
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}
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}
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