zigbee-herdsman
Version:
An open source ZigBee gateway solution with node.js.
59 lines • 2.44 kB
JavaScript
;
/* v8 ignore start */
Object.defineProperty(exports, "__esModule", { value: true });
exports.ZBOSSReader = void 0;
const node_stream_1 = require("node:stream");
const logger_1 = require("../../utils/logger");
const consts_1 = require("./consts");
const NS = "zh:zboss:read";
class ZBOSSReader extends node_stream_1.Transform {
buffer;
constructor(opts) {
super(opts);
this.buffer = Buffer.alloc(0);
}
_transform(chunk, _encoding, cb) {
let data = Buffer.concat([this.buffer, chunk]);
let position;
logger_1.logger.debug(`<<< DATA [${chunk.toString("hex")}]`, NS);
// SIGNATURE - start of package
// biome-ignore lint/suspicious/noAssignInExpressions: shorter
while ((position = data.indexOf(consts_1.SIGNATURE)) !== -1) {
// need for read length
if (data.length > position + 3) {
const len = data.readUInt16LE(position + 1);
if (data.length >= position + 1 + len) {
const frame = data.subarray(position + 1, position + 1 + len);
logger_1.logger.debug(`<<< FRAME [${frame.toString("hex")}]`, NS);
// emit the frame via 'data' event
this.push(frame);
// if position not 1 - try to convert buffer before position to text - chip console output
if (position > 1) {
logger_1.logger.debug(`<<< CONSOLE:\n\r${data.subarray(0, position - 1).toString()}`, NS);
}
// remove the frame from internal buffer (set below)
data = data.subarray(position + 1 + len);
if (data.length)
logger_1.logger.debug(`<<< TAIL [${data.toString("hex")}]`, NS);
}
else {
logger_1.logger.debug(`<<< Not enough data. Length=${data.length}, frame length=${len}. Waiting`, NS);
break;
}
}
else {
logger_1.logger.debug(`<<< Not enough data. Length=${data.length}. Waiting`, NS);
break;
}
}
this.buffer = data;
cb();
}
_flush(cb) {
this.push(this.buffer);
this.buffer = Buffer.alloc(0);
cb();
}
}
exports.ZBOSSReader = ZBOSSReader;
//# sourceMappingURL=reader.js.map