node-red-contrib-knx-ultimate
Version:
Control your KNX intallation via Node-Red! Single Node KNX IN/OUT with optional ETS group address importer. Easy to use and highly configurable.
53 lines • 1.94 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.KNXAddresses = void 0;
const KNXConstants_1 = require("./KNXConstants");
const KNXAddress_1 = require("./KNXAddress");
class KNXAddresses {
constructor() {
this._type = KNXConstants_1.KNX_CONSTANTS.KNX_ADDRESSES;
this._addresses = new Set();
}
get length() {
return 2 + this._addresses.size * 2;
}
get type() {
return this._type;
}
static createFromBuffer(buffer, offset = 0) {
if (offset + this.length >= buffer.length) {
throw new Error(`offset ${offset} out of buffer range ${buffer.length}`);
}
const structureLength = buffer.readUInt8(offset);
if (offset + structureLength > buffer.length) {
throw new Error(`offset ${offset} block length: ${structureLength} out of buffer range ${buffer.length}`);
}
offset++;
const type = buffer.readUInt8(offset++);
if (type !== KNXConstants_1.KNX_CONSTANTS.KNX_ADDRESSES) {
throw new Error(`Invalid KNXAddresses type ${type}`);
}
const knxAddresses = new KNXAddresses();
for (let i = 2; i < structureLength; i += 2) {
knxAddresses.add(buffer.readUInt16BE(offset));
offset += 2;
}
return knxAddresses;
}
add(address) {
this._addresses.add(KNXAddress_1.KNXAddress.createFromString(address));
}
toBuffer() {
const buffer = Buffer.alloc(this.length);
let offset = 0;
buffer.writeUInt8(this.length, offset++);
buffer.writeUInt8(KNXConstants_1.KNX_CONSTANTS.KNX_ADDRESSES, offset++);
for (const knxAddress of this._addresses) {
buffer.writeUInt16BE(knxAddress.get(), offset);
offset += 2;
}
return buffer;
}
}
exports.KNXAddresses = KNXAddresses;
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