text: "use strict";
  Object.defineProperty(exports, "__esModule", { value: true });
  const commons_js_1 = require("engine.io-parser/build/cjs/commons.js");
  const encodePacket = ({ type, data }, supportsBinary, callback) => {
      if (data instanceof ArrayBuffer || ArrayBuffer.isView(data)) {
          const buffer = toBuffer(data);
          return callback(encodeBuffer(buffer, supportsBinary));
      }
      // plain string
      return callback(commons_js_1.PACKET_TYPES[type] + (data || ""));
  };
  const toBuffer = data => {
      if (Buffer.isBuffer(data)) {
          return data;
      }
      else if (data instanceof ArrayBuffer) {
          return Buffer.from(data);
      }
      else {
          return Buffer.from(data.buffer, data.byteOffset, data.byteLength);
      }
  };
  // only 'message' packets can contain binary, so the type prefix is not needed
  const encodeBuffer = (data, supportsBinary) => {
      return supportsBinary ? data : "b" + data.toString("base64");
  };
  exports.default = encodePacket;
  