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Viewing file:     decodePacket.js (1.39 KB)      -rwxrwxr-x

import { ERROR_PACKET, PACKET_TYPES_REVERSE } from "./commons.js";
const decodePacket = (encodedPacket, binaryType) => {
    if (typeof encodedPacket !== "string") {
        return {
            type: "message",
            data: mapBinary(encodedPacket, binaryType)
        };
    }
    const type = encodedPacket.charAt(0);
    if (type === "b") {
        const buffer = Buffer.from(encodedPacket.substring(1), "base64");
        return {
            type: "message",
            data: mapBinary(buffer, binaryType)
        };
    }
    if (!PACKET_TYPES_REVERSE[type]) {
        return ERROR_PACKET;
    }
    return encodedPacket.length > 1
        ? {
            type: PACKET_TYPES_REVERSE[type],
            data: encodedPacket.substring(1)
        }
        : {
            type: PACKET_TYPES_REVERSE[type]
        };
};
const mapBinary = (data, binaryType) => {
    const isBuffer = Buffer.isBuffer(data);
    switch (binaryType) {
        case "arraybuffer":
            return isBuffer ? toArrayBuffer(data) : data;
        case "nodebuffer":
        default:
            return data; // assuming the data is already a Buffer
    }
};
const toArrayBuffer = (buffer) => {
    const arrayBuffer = new ArrayBuffer(buffer.length);
    const view = new Uint8Array(arrayBuffer);
    for (let i = 0; i < buffer.length; i++) {
        view[i] = buffer[i];
    }
    return arrayBuffer;
};
export default decodePacket;