rxpoweredup/src/messenger/inbound-message-dissector.js

A Typescript RxJS-based library for controlling LEGO Powered UP hubs & peripherals.

var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
import { injectable } from 'tsyringe';
let InboundMessageDissector = class InboundMessageDissector {
    messageTypeLength = 1;
    shortHeaderLength = 1;
    longHeaderLength = 2;
    hubIdLength = 1;
    dissect(rawMessage) {
        const messageType = rawMessage[this.getMessageTypeOffset(rawMessage)];
        return {
            header: {
                messageType,
            },
            payload: this.getPayload(rawMessage),
        };
    }
    getPayload(message) {
        return message.slice(this.getMessagePayloadOffset(message));
    }
    getMessageTypeOffset(message) {
        const headerLength = message[0] >= 127 ? this.longHeaderLength : this.shortHeaderLength;
        return headerLength + this.hubIdLength;
    }
    getMessagePayloadOffset(message) {
        return this.getMessageTypeOffset(message) + this.messageTypeLength;
    }
};
InboundMessageDissector = __decorate([
    injectable()
], InboundMessageDissector);
export { InboundMessageDissector };