SimulatorMessages

script.js

const littleToBigEndian = (data) =>
	data
		.slice(0, 8)
		.match(/.{1,2}/g)
		.reverse()
		.join("");

const bigEndian = (data) =>
	data.map((fourBytes) =>
		fourBytes
			.match(/.{1,4}/g)
			.reverse()
			.join("")
	);

const fourBytesGroups = (data) => data.match(/.{1,8}/g);

const hex2bin = (hex) => parseInt(hex, 16).toString(2).padStart(8, "0");

const decodeData = (incomingData) => {
	let simulatorData = incomingData.slice(24, -8);

	const FUNCTIONAL_STATUS = littleToBigEndian(simulatorData);

	let rotarySwitches = simulatorData.slice(8, 16);

	// Big Endian Format
	simulatorData = fourBytesGroups(simulatorData);
	simulatorData = bigEndian(simulatorData);

	// Replace FUNCTIONAL_STATUS & ROTARY_SWITCHES
	simulatorData[0] = FUNCTIONAL_STATUS;
	simulatorData[1] = rotarySwitches;

	rotarySwitches = hex2bin(rotarySwitches);

	const NAV_SELECT_CODE = rotarySwitches.slice(6, 8);
	const APP_SELECT_CODE = rotarySwitches.slice(2, 4);
	const VBR_SELECT_CODE = rotarySwitches.slice(4, 6);

	const VHF_L_VOLUME = simulatorData[2].slice(0, 4);
	const VHF_C_VOLUME = simulatorData[2].slice(4, 8);

	const VHF_R_VOLUME = simulatorData[3].slice(0, 4);
	const FLAT_VOLUME = simulatorData[3].slice(4, 8);

	const CAB_VOLUME = simulatorData[4].slice(0, 4);
	const PA_VOLUME = simulatorData[4].slice(4, 8);

	const HF_L_VOLUME = simulatorData[5].slice(0, 4);
	const HF_R_VOLUME = simulatorData[5].slice(4, 8);

	const SAT_1_VOLUME = simulatorData[6].slice(0, 4);
	const SAT_2_VOLUME = simulatorData[6].slice(4, 8);

	const NAV_VOLUME = simulatorData[7].slice(0, 4);
	const APPROACH_VOLUME = simulatorData[7].slice(4, 8);

	const SPEAKER_VOLUME = simulatorData[8].slice(0, 4);

	const decoded = {
		NAV_SELECT_CODE,
		VBR_SELECT_CODE,
		APP_SELECT_CODE,
		VHF_L_VOLUME,
		VHF_C_VOLUME,
		VHF_R_VOLUME,
		FLAT_VOLUME,
		CAB_VOLUME,
		PA_VOLUME,
		HF_L_VOLUME,
		HF_R_VOLUME,
		SAT_1_VOLUME,
		SAT_2_VOLUME,
		NAV_VOLUME,
		APPROACH_VOLUME,
		SPEAKER_VOLUME
	};

	return decoded;
};

// Test Cases

const testCase1 =
	"a21000629fc213f9000000000300000000000000000032c3000003c300001a27000000df00007fff08c5000000002e2a4d94f6c0";

const testCase2 =
	"ac350062af3cc9190000000003000000000000152bad00000d6c00006af900002b5600007fff000000003191000000003837e674";

const testCase3 =
	"b69c0062bf1c2f9100000000030000000000002a14da2fcf0000000000002e06000000000000365100000c95000000006685e4a1";

const testCase4 =
	"c5be0062d6336ce900000000030000000000002b5285506b0000420408d0000000000000000000000000000000000000179265a9";

const testCase5 =
	"c8700062da50482900000000030000000000002b5285506b0000420408d0000000000000000000000000000000000000f8eca479";

const testCase6 =
	"ce980062e3b50d4100000000030000000000002b5285506b0000420408d00000000000000000000000000000000000004bdb021d";

const testCase7 =
	"d3d07a67e461695800000000030000000000003a00010001000100010001000100010001000100010001000100000001afb4fd20";

console.log("Test Case 1", decodeData(testCase1));
console.log("Test Case 2", decodeData(testCase2));
console.log("Test Case 3", decodeData(testCase3));
console.log("Test Case 4", decodeData(testCase4));
console.log("Test Case 5", decodeData(testCase5));
console.log("Test Case 6", decodeData(testCase6));
console.log("Test Case 7", decodeData(testCase7));

simulatormessages.markdown

SimulatorMessages

A Pen by Jose Estrada on CodePen.

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