Function encodePacket

packages/engine.io-parser/lib/encodePacket.ts:3–15

(
  { type, data }: Packet,
  supportsBinary: boolean,
  callback: (encodedPacket: RawData) => void,
)

import { PACKET_TYPES, Packet, RawData } from "./commons.js";

export const encodePacket = (
  { type, data }: Packet,
  supportsBinary: boolean,
  callback: (encodedPacket: RawData) => void,
) => {
  if (data instanceof ArrayBuffer || ArrayBuffer.isView(data)) {
    return callback(
      supportsBinary ? data : "b" + toBuffer(data, true).toString("base64"),
    );
  }
  // plain string
  return callback(PACKET_TYPES[type] + (data || ""));
};

const toBuffer = (data: BufferSource, forceBufferConversion: boolean) => {
  if (