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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WebTransport = void 0;
const transport_1 = require("../transport");
const debug_1 = require("debug");
const engine_io_parser_1 = require("engine.io-parser");
const debug = (0, debug_1.default)("engine:webtransport");
/**
* Reference: https://developer.mozilla.org/en-US/docs/Web/API/WebTransport_API
*/
class WebTransport extends transport_1.Transport {
constructor(session, stream, reader) {
super({ _query: { EIO: "4" } });
this.session = session;
const transformStream = (0, engine_io_parser_1.createPacketEncoderStream)();
transformStream.readable.pipeTo(stream.writable).catch(() => {
debug("the stream was closed");
});
this.writer = transformStream.writable.getWriter();
(async () => {
try {
while (true) {
const { value, done } = await reader.read();
if (done) {
debug("session is closed");
break;
}
debug("received chunk: %o", value);
this.onPacket(value);
}
}
catch (e) {
debug("error while reading: %s", e.message);
}
})();
session.closed.then(() => this.onClose());
this.writable = true;
}
get name() {
return "webtransport";
}
get supportsFraming() {
return true;
}
async send(packets) {
this.writable = false;
try {
for (let i = 0; i < packets.length; i++) {
const packet = packets[i];
await this.writer.write(packet);
}
}
catch (e) {
debug("error while writing: %s", e.message);
}
this.writable = true;
this.emit("drain");
}
doClose(fn) {
debug("closing WebTransport session");
this.session.close();
fn && fn();
}
}
exports.WebTransport = WebTransport;
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