Parnic
ed99d411b2
This avoids unnecessary allocations/reallocations while decoding a message by pre-sizing the buffer to the amount we know it will require. I feel like there's probably a better way to handle this, but this works for now.
64 lines
1.6 KiB
JavaScript
Executable File
64 lines
1.6 KiB
JavaScript
Executable File
'use strict';
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const SLMessage = require('./SLMessage.js').SLMessage;
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const MSG_ID = 12592;
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exports.SLChemDataMessage = class SLChemDataMessage extends SLMessage {
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constructor(buf) {
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var size;
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if (buf) {
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size = buf.readInt32LE(4) + 8;
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}
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super(0, MSG_ID, size);
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if (!buf) {
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this.writeInt32LE(0); // controller index
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} else {
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this._wroteSize = true;
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this.writeBuffer(buf, 0);
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this.decode();
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}
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}
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decode() {
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super.decode();
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this.isValid = false;
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let sentinel = this.readInt32LE();
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if (sentinel === 42) {
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this.isValid = true;
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this._readOffset++;
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this.pH = this.readUInt16BE() / 100;
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this.orp = this.readUInt16BE();
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this.pHSetPoint = this.readUInt16BE() / 100;
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this.orpSetPoint = this.readUInt16BE();
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this._readOffset += 12;
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this.pHTankLevel = this.readUInt8();
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this.orpTankLevel = this.readUInt8();
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this.saturation = this.readUInt8();
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if ((this.saturation & 128) !== 0) {
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this.saturation = -(256 - this.saturation);
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}
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this.saturation /= 100;
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this.calcium = this.readUInt16BE();
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this.cyanuricAcid = this.readUInt16BE();
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this.alkalinity = this.readUInt16BE();
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let salt = this.readUInt16LE();
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this.saltPPM = salt * 50;
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this.temperature = this.readUInt8();
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this._readOffset += 2;
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let balance = this.readUInt8();
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this.corrosive = (balance & 1) !== 0;
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this.scaling = (balance & 2) !== 0;
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this.error = (salt & 128) !== 0;
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}
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}
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static getResponseId() {
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return MSG_ID + 1;
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}
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};
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