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import * as wsConnectionApi from "native";
export class WebSocket {
client;
listeners;
onopen;
onclose;
onmessage;
onping;
onpong;
onerror;
#closed = false;
constructor(url) {
this.listeners = Object.create(null);
this.#connect(url);
}
addEventListener(name, callback) {
if (!this.listeners[name]) {
this.listeners[name] = [];
}
const listeners = this.listeners[name]
listeners.push(callback);
}
async send(data) {
try {
await wsConnectionApi.sendStr(this.client, data + "");
} catch (error) {
this.#emit('error', error);
}
}
close() {
if (!this.#closed) {
this.#closed = true;
this.#emit("close");
wsConnectionApi.close(this.client);
}
}
async #connect(url) {
try {
this.client = await wsConnectionApi.connect(url);
this.#emit("open");
this.#doRead();
} catch (error) {
this.#emit("error", error);
}
}
async #doRead() {
try {
loop:
for (;;) {
let [type, data] = await wsConnectionApi.read(this.client);
// console.log("read message", type, data);
switch (type) {
case "text":
this.#emit("message", data);
break;
case "binary":
this.#emit("message", ArrayBuffer.from(data));
break;
case "ping":
this.#emit("ping", data);
break;
case "pong":
this.#emit("pong", data);
break;
case "close":
break loop;
case "frame":
this.#emit("frame", data);
break;
}
}
//TODO maybe half-close?
this.close();
} catch (error) {
console.error(error);
this.#emit("error");
this.close();
}
}
#emit(name, data) {
// console.log("emit", name, data);
/**
* @type {Event}
*/
let event = {
bubbles: false,
cancelBubble: false,
cancelable: false,
composed: false,
currentTarget: null,
eventPhase: 0,
isTrusted: true,
returnValue: false,
srcElement: null,
target: null,
timeStamp: new Date().getTime(),
type: name,
data,
};
const key = `on${name}`;
if (this[key]) {
try {
this[key](event)
} catch (error) {
console.error(error);
}
}
for (const listener of this.listeners[name] || []) {
try {
listener(event);
} catch (error) {
console.error(error);
}
}
}
}
globalThis.WebSocket = WebSocket;