add encoder for spot module

src/encoders/index.ts

@@ -1,4 +1,5 @@
 import ChannelBlock from './lighting/channel-block';
+import Spot from './lighting/spot';
 import CentroidAccelVelocity from './motion/centroid-accel-velocity';
 import CentroidPosition from './motion/centroid-position';
 import OrientationEuler from './motion/orientation-euler';
@@ -23,5 +24,6 @@ export const Encoders = {
   TrackedPointAccelVelocity,
   ZoneCollisionDetection,
   ZoneObject,
+  Spot,
   ChannelBlock,
 };

src/encoders/lighting/spot.ts

@@ -0,0 +1,32 @@
+export default (
+  id: number,
+  offset: number,
+  channelBlockModules: Uint8Array[],
+  isLittleEndian: boolean = false
+): Uint8Array => {
+  let totalSpotModuleSize = 1 + 2 + 2 + 2 + 2;
+
+  channelBlockModules.forEach((channelBlockModule) => {
+    totalSpotModuleSize += channelBlockModule.byteLength;
+  });
+
+  const bytes = new Uint8Array(totalSpotModuleSize);
+  const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
+
+  let dataOffset = 0;
+  view.setUint8(dataOffset, 0x0a);
+  dataOffset += 1;
+  view.setUint16(dataOffset, bytes.byteLength, isLittleEndian);
+  dataOffset += 2;
+  view.setUint16(dataOffset, id, isLittleEndian);
+  dataOffset += 2;
+  view.setUint16(dataOffset, offset, isLittleEndian);
+  dataOffset += 2;
+  view.setUint16(dataOffset, channelBlockModules.length, isLittleEndian);
+  dataOffset += 2;
+  channelBlockModules.forEach((channelBlockModule) => {
+    bytes.set(channelBlockModule, dataOffset);
+    dataOffset += channelBlockModule.length;
+  });
+  return bytes;
+};

tests/lighting-encode.test.js

@@ -3,6 +3,13 @@ const { describe, it } = require('node:test');
 const { Encoders } = require('../');
 
 const goodTests = [
+  {
+    description: 'Spot + Single Channel Block',
+    expected: new Uint8Array([0x0a, 0x00, 0x0e, 0x12, 0x34, 0x00, 0x01, 0x00, 0x01, 0x00, 0x08, 0x00, 0x06, 0x40]),
+    bytes: () => {
+      return Encoders.Spot(0x1234, 1, [Encoders.ChannelBlock(8, 6, 64)]);
+    },
+  },
   {
     description: 'Channel Block',
     expected: new Uint8Array([0x00, 0x08, 0x00, 0x06, 0x40]),