From f8f3f060dc30802620b4d01ef61f35e2ddb17cdd Mon Sep 17 00:00:00 2001
From: Joel Wetzell <jwetzell@yahoo.com>
Date: Sat, 15 Mar 2025 13:08:37 -0500
Subject: [PATCH] add encoder for channel-block

---
 src/encoders/index.ts                  |  2 ++
 src/encoders/lighting/channel-block.ts | 13 +++++++++++++
 tests/lighting-encode.test.js          | 10 +++++++++-
 3 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 src/encoders/lighting/channel-block.ts

diff --git a/src/encoders/index.ts b/src/encoders/index.ts
index 77121f3..21bf15e 100644
--- a/src/encoders/index.ts
+++ b/src/encoders/index.ts
@@ -1,3 +1,4 @@
+import ChannelBlock from './lighting/channel-block';
 import CentroidAccelVelocity from './motion/centroid-accel-velocity';
 import CentroidPosition from './motion/centroid-position';
 import OrientationEuler from './motion/orientation-euler';
@@ -22,4 +23,5 @@ export const Encoders = {
   TrackedPointAccelVelocity,
   ZoneCollisionDetection,
   ZoneObject,
+  ChannelBlock,
 };
diff --git a/src/encoders/lighting/channel-block.ts b/src/encoders/lighting/channel-block.ts
new file mode 100644
index 0000000..703768a
--- /dev/null
+++ b/src/encoders/lighting/channel-block.ts
@@ -0,0 +1,13 @@
+export default (offset: number, fade: number, value: number, isLittleEndian: boolean = false): Uint8Array => {
+  const bytes = new Uint8Array(5);
+  const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
+
+  let dataOffset = 0;
+  view.setUint16(dataOffset, offset, isLittleEndian);
+  dataOffset += 2;
+  view.setUint16(dataOffset, fade, isLittleEndian);
+  dataOffset += 2;
+  view.setUint8(dataOffset, value);
+
+  return bytes;
+};
diff --git a/tests/lighting-encode.test.js b/tests/lighting-encode.test.js
index 846a8ca..cc16572 100644
--- a/tests/lighting-encode.test.js
+++ b/tests/lighting-encode.test.js
@@ -2,7 +2,15 @@ const { deepEqual, throws } = require('assert');
 const { describe, it } = require('node:test');
 const { Encoders } = require('../');
 
-const goodTests = [];
+const goodTests = [
+  {
+    description: 'Channel Block',
+    expected: new Uint8Array([0x00, 0x08, 0x00, 0x06, 0x40]),
+    bytes: () => {
+      return Encoders.ChannelBlock(8, 6, 64);
+    },
+  },
+];
 
 describe('RTTrPL Message Encoding', () => {
   goodTests.forEach((messageTest) => {