knxultimate/src/protocol/KNXDescriptionRequest.ts

KNX IP protocol implementation for Node. This is the ENGINE of Node-Red KNX-Ultimate node.

import { KNX_CONSTANTS } from './KNXConstants'
import KNXPacket from './KNXPacket'
import HPAI from './HPAI'

export default class KNXDescriptionRequest extends KNXPacket {
	hpai: HPAI

	constructor(hpai: HPAI) {
		super(KNX_CONSTANTS.DESCRIPTION_REQUEST, hpai.length)
		this.hpai = hpai
	}

	static createFromBuffer(
		buffer: Buffer,
		offset: number = 0,
	): KNXDescriptionRequest {
		if (offset + this.length >= buffer.length) {
			throw new Error('Buffer too short')
		}
		const hpai = HPAI.createFromBuffer(buffer, offset)
		return new KNXDescriptionRequest(hpai)
	}

	toBuffer(): Buffer {
		return Buffer.concat([this.header.toBuffer(), this.hpai.toBuffer()])
	}
}