295 lines
8.7 KiB
TypeScript
295 lines
8.7 KiB
TypeScript
import { EventEmitter } from 'events'
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import { SocketIO } from "./interfaces";
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import { Packet } from './packet';
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import { PacketTypes, SubPacketTypes } from './types';
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import { Client } from './client';
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import { Namespace } from './namespace';
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export class Socket extends EventEmitter implements SocketIO.Socket {
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nsp: Namespace;
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server: SocketIO.Server;
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adapter: SocketIO.Adapter;
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id: string;
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request: any;
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client: Client;
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conn: SocketIO.EngineSocket;
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rooms: { [id: string]: string; };
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acks: { [id: string]: Function; };
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connected: boolean;
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disconnected: boolean;
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handshake: SocketIO.Handshake;
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fns: any[];
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flags: { [key: string]: boolean };
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_rooms: string[];
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private events = [
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'error',
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'connect',
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'disconnect',
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'disconnecting',
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'newListener',
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'removeListener'
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]
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constructor(nsp: Namespace, client: Client, query = {}) {
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super();
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this.nsp = nsp;
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this.server = nsp.server;
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this.adapter = this.nsp.adapter;
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this.id = nsp.name !== '/' ? nsp.name + '#' + client.id : client.id;
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this.client = client;
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this.request = client.request;
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this.conn = client.conn;
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this.rooms = {};
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this.acks = {};
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this.connected = true;
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this.disconnected = false;
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// this.handshake = this.buildHandshake(query);
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this.fns = [];
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this.flags = {};
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this._rooms = [];
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}
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get json() {
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this.flags.json = true;
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return this
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}
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get volatile() {
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this.flags.volatile = true;
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return this
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}
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get broadcast() {
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this.flags.broadcast = true;
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return this
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}
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get local() {
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this.flags.local = true;
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return this
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}
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to(room: string): SocketIO.Socket {
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if (!~this._rooms.indexOf(room)) this._rooms.push(room);
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return this;
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}
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in(room: string): SocketIO.Socket {
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return this.to(room);
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}
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use(fn: (packet: SocketIO.Packet, next: (err?: any) => void) => void): SocketIO.Socket {
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throw new Error("Method not implemented.");
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}
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send(...args: any[]): SocketIO.Socket {
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this.emit("message", ...args)
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return this;
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}
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write(...args: any[]): SocketIO.Socket {
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return this.send(...args);
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}
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join(rooms: string | string[], fn?: (err?: any) => void): SocketIO.Socket {
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if (!Array.isArray(rooms)) {
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rooms = [rooms];
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}
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rooms = rooms.filter((room) => {
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return !this.rooms.hasOwnProperty(room);
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});
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if (!rooms.length) {
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fn && fn(null);
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return this;
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}
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return this;
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}
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leave(name: string, fn?: Function): SocketIO.Socket {
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delete this.rooms[name];
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fn && fn(null)
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return this;
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}
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leaveAll(): void {
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this.adapter.delAll(this.id);
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this.rooms = {};
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}
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disconnect(close?: boolean): SocketIO.Socket {
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if (!this.connected) return this;
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if (close) {
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this.client.disconnect();
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} else {
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this.packet({ type: PacketTypes.MESSAGE, sub_type: SubPacketTypes.DISCONNECT });
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this.onclose('server namespace disconnect');
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}
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return this;
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}
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compress(compress: boolean): SocketIO.Socket {
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throw new Error("Method not implemented.");
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}
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error(err: any): void {
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this.packet({ type: PacketTypes.MESSAGE, sub_type: SubPacketTypes.ERROR, data: err });
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}
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// ==========================================
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buildHandshake(query): SocketIO.Handshake {
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let requestQuery = this.request.uri();
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return {
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headers: this.request.headers(),
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time: (new Date) + '',
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address: this.conn.remoteAddress,
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xdomain: !!this.request.headers.origin,
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secure: !!this.request.connection.encrypted,
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issued: +(new Date),
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url: this.request.url,
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query: Object.assign(query, requestQuery)
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}
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}
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emit(event: string, ...args: any[]): boolean {
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if (~this.events.indexOf(event)) {
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super.emit(event, ...args);
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// @ts-ignore
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return this;
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}
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let packet: Packet = {
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type: PacketTypes.MESSAGE,
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sub_type: (this.flags.binary !== undefined ? this.flags.binary : this.hasBin(args)) ? SubPacketTypes.BINARY_EVENT : SubPacketTypes.EVENT,
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name: event,
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data: args
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}
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// access last argument to see if it's an ACK callback
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if (typeof args[args.length - 1] === 'function') {
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if (this._rooms.length || this.flags.broadcast) {
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throw new Error('Callbacks are not supported when broadcasting');
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}
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// debug('emitting packet with ack id %d', this.nsp.ids);
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this.acks[this.nsp.ids] = args.pop();
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packet.id = this.nsp.ids++;
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}
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let rooms = this._rooms.slice(0);
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let flags = Object.assign({}, this.flags);
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// reset flags
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this._rooms = [];
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this.flags = {};
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if (rooms.length || flags.broadcast) {
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this.adapter.broadcast(packet, {
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except: [this.id],
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rooms: rooms,
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flags: flags
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});
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} else {
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// dispatch packet
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this.packet(packet, flags);
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}
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// @ts-ignore
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return this;
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}
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packet(packet: Packet, opts?: any) {
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packet.nsp = this.nsp.name;
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opts = opts || {};
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opts.compress = false !== opts.compress;
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this.client.packet(packet, opts);
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}
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onconnect() {
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this.nsp.connected[this.id] = this;
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this.client.sockets[this.id] = this;
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this.join(this.id);
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// let skip = this.nsp.name === '/' && this.nsp.fns.length === 0;
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// if (skip) {
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// debug('packet already sent in initial handshake');
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// } else {
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this.packet({
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type: PacketTypes.MESSAGE,
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sub_type: SubPacketTypes.CONNECT
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});
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// }
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}
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onclose(reason?: string) {
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if (!this.connected) return this;
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// debug('closing socket - reason %s', reason);
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this.emit('disconnecting', reason);
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this.leaveAll();
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this.nsp.remove(this);
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this.client.remove(this);
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this.connected = false;
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this.disconnected = true;
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delete this.nsp.connected[this.id];
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this.emit('disconnect', reason);
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}
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onpacket(packet: Packet) {
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switch (packet.sub_type) {
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// 2
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case SubPacketTypes.EVENT:
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this.onevent(packet);
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break;
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// 5
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case SubPacketTypes.BINARY_EVENT:
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this.onevent(packet);
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break;
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// 3
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case SubPacketTypes.ACK:
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this.onack(packet);
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break;
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// 6
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case SubPacketTypes.BINARY_ACK:
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this.onack(packet);
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break;
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// 1
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case SubPacketTypes.DISCONNECT:
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this.ondisconnect();
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break;
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// 4
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case SubPacketTypes.ERROR:
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this.onerror(new Error(packet.data));
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}
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}
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onerror(err: Error) {
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if (this.listeners('error').length) {
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this.emit('error', err);
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} else {
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console.error('Missing error handler on `socket`.');
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console.error(err.stack);
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}
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}
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ondisconnect() {
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this.onclose('client namespace disconnect')
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}
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onevent(packet: Packet) {
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if (null != packet.id) {
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// debug('attaching ack callback to event');
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this.dispatch(packet, this.ack(packet.id));
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} else {
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this.dispatch(packet);
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}
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}
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ack(id: number) {
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let sent = false;
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return (...args: any[]) => {
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if (sent) return;
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this.packet({
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id: id,
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type: PacketTypes.MESSAGE,
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sub_type: this.hasBin(args) ? SubPacketTypes.BINARY_ACK : SubPacketTypes.ACK,
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data: args
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});
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sent = true;
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}
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}
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onack(packet: Packet) {
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let ack = this.acks[packet.id];
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if ('function' == typeof ack) {
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// debug('calling ack %s with %j', packet.id, packet.data);
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ack.apply(this, packet.data);
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delete this.acks[packet.id];
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} else {
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// debug('bad ack %s', packet.id);
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}
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}
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dispatch(packet: Packet, ack?: Function) {
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if (ack) { this.acks[packet.id] = ack; }
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super.emit(packet.name, ...packet.data, ack)
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}
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private hasBin(obj: any) {
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return false;
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}
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}
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