naruyaizumi/lib/WAUSync/Protocols/USyncDeviceProtocol.js

A WebSockets library for interacting with WhatsApp Web

import { assertNodeErrorFree, getBinaryNodeChild } from "../../WABinary/index.js";
export class USyncDeviceProtocol {
    constructor() {
        this.name = "devices";
    }
    getQueryElement() {
        return {
            tag: "devices",
            attrs: {
                version: "2",
            },
        };
    }
    getUserElement(/* user: USyncUser */) {
        //TODO: Implement device phashing, ts and expectedTs
        //TODO: if all are not present, return null <- current behavior
        //TODO: otherwise return a node w tag 'devices' w those as attrs
        return null;
    }
    parser(node) {
        const deviceList = [];
        let keyIndex = undefined;
        if (node.tag === "devices") {
            assertNodeErrorFree(node);
            const deviceListNode = getBinaryNodeChild(node, "device-list");
            const keyIndexNode = getBinaryNodeChild(node, "key-index-list");
            if (Array.isArray(deviceListNode?.content)) {
                for (const { tag, attrs } of deviceListNode.content) {
                    const id = +attrs.id;
                    const keyIndex = +attrs["key-index"];
                    if (tag === "device") {
                        deviceList.push({
                            id,
                            keyIndex,
                            isHosted: !!(attrs["is_hosted"] && attrs["is_hosted"] === "true"),
                        });
                    }
                }
            }
            if (keyIndexNode?.tag === "key-index-list") {
                keyIndex = {
                    timestamp: +keyIndexNode.attrs["ts"],
                    signedKeyIndex: keyIndexNode?.content,
                    expectedTimestamp: keyIndexNode.attrs["expected_ts"]
                        ? +keyIndexNode.attrs["expected_ts"]
                        : undefined,
                };
            }
        }
        return {
            deviceList,
            keyIndex,
        };
    }
}
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