knxultimate
Version:
KNX IP protocol implementation for Node. This is the ENGINE of Node-Red KNX-Ultimate node.
67 lines • 2.42 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const KNXConstants_1 = require("./KNXConstants");
class ServiceFamilies {
constructor() {
this._type = KNXConstants_1.KNX_CONSTANTS.SUPP_SVC_FAMILIES;
this._services = new Map();
}
get type() {
return this._type;
}
get length() {
return 2 * this._services.size + 2;
}
get services() {
return this._services;
}
static createFromBuffer(buffer, offset = 0) {
if (offset >= 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.SUPP_SVC_FAMILIES &&
type !== KNXConstants_1.KNX_CONSTANTS.SECURED_SERVICE_FAMILIES) {
throw new Error(`Invalid Service Family type ${type}`);
}
const serviceFamily = new ServiceFamilies();
serviceFamily._type = type;
for (let i = 2; i < structureLength; i += 2) {
serviceFamily.set(buffer.readUInt8(offset), buffer.readUInt8(offset + 1));
offset += 2;
}
return serviceFamily;
}
set(id, version) {
const _id = Number(id);
if (isNaN(_id) || id > 0xff || id < 0) {
throw new Error('Invalid service id');
}
const _version = Number(version);
if (isNaN(_version) || version > 0xff || version < 0) {
throw new Error('Invalid service version');
}
this._services.set(id, version);
}
service(id) {
return this._services.get(id);
}
toBuffer() {
const buffer = Buffer.alloc(this.length);
let offset = 0;
buffer.writeUInt8(this.length, offset++);
buffer.writeUInt8(KNXConstants_1.KNX_CONSTANTS.SUPP_SVC_FAMILIES, offset++);
for (const [id, version] of this._services) {
buffer.writeUInt8(id, offset++);
buffer.writeUInt8(version, offset++);
}
return buffer;
}
}
exports.default = ServiceFamilies;
//# sourceMappingURL=ServiceFamilies.js.map