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add mqtt listener

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Matt
2025-04-15 15:34:49 -04:00
parent 2da0ee24e4
commit f20031e2ea
9 changed files with 2521 additions and 0 deletions
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mqtt/Dockerfile Normal file
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FROM node:lts-alpine3.17
# add project files to /app
ADD ./mqtt /app
ADD ./prisma /app/prisma
ADD ./protos /app/protos
WORKDIR /app
# install node dependencies
RUN npm install && npx prisma generate
ENTRYPOINT ["node", "index.js"]

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{
"name": "mqtt",
"version": "1.0.0",
"lockfileVersion": 3,
"requires": true,
"packages": {
"": {
"name": "mqtt",
"version": "1.0.0",
"license": "ISC",
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"command-line-args": "^5.2.1",
"command-line-usage": "^7.0.1",
"mqtt": "^5.11.0",
"protobufjs": "^7.5.0"
},
"devDependencies": {
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"version": "7.0.71",
"resolved": "https://registry.npmjs.org/worker-timers-worker/-/worker-timers-worker-7.0.71.tgz",
"integrity": "sha512-ks/5YKwZsto1c2vmljroppOKCivB/ma97g9y77MAAz2TBBjPPgpoOiS1qYQKIgvGTr2QYPT3XhJWIB6Rj2MVPQ==",
"license": "MIT",
"dependencies": {
"@babel/runtime": "^7.24.5",
"tslib": "^2.6.2"
}
},
"node_modules/ws": {
"version": "8.18.1",
"resolved": "https://registry.npmjs.org/ws/-/ws-8.18.1.tgz",
"integrity": "sha512-RKW2aJZMXeMxVpnZ6bck+RswznaxmzdULiBr6KY7XkTnW8uvt0iT9H5DkHUChXrc+uurzwa0rVI16n/Xzjdz1w==",
"license": "MIT",
"engines": {
"node": ">=10.0.0"
},
"peerDependencies": {
"bufferutil": "^4.0.1",
"utf-8-validate": ">=5.0.2"
},
"peerDependenciesMeta": {
"bufferutil": {
"optional": true
},
"utf-8-validate": {
"optional": true
}
}
}
}
}

18
mqtt/package.json Normal file
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{
"name": "mqtt",
"version": "1.0.0",
"main": "index.js",
"author": "",
"license": "ISC",
"description": "",
"dependencies": {
"@prisma/client": "^5.11.0",
"command-line-args": "^5.2.1",
"command-line-usage": "^7.0.1",
"mqtt": "^5.11.0",
"protobufjs": "^7.5.0"
},
"devDependencies": {
"prisma": "^5.10.2"
}
}

23
mqtt/utils/node_id_util.js Normal file
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class NodeIdUtil {
/**
* Converts the provided hex id to a numeric id, for example: !FFFFFFFF to 4294967295
* Anything else will be converted as is to a BigInt, for example "4294967295" to 4294967295
* @param hexIdOrNumber a node id in hex format with a prepended "!", or a numeric node id as a string or number
* @returns {bigint} the node id in numeric form
*/
static convertToNumeric(hexIdOrNumber) {
// check if this is a hex id, and convert to numeric
if(hexIdOrNumber.toString().startsWith("!")){
return BigInt('0x' + hexIdOrNumber.replaceAll("!", ""));
}
// convert string or number to numeric
return BigInt(hexIdOrNumber);
}
}
module.exports = NodeIdUtil;

9
mqtt/utils/node_id_util.test.js Normal file
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const NodeIdUtil = require("./node_id_util");
test('can convert hex id to numeric id', () => {
expect(NodeIdUtil.convertToNumeric("!FFFFFFFF")).toBe(BigInt(4294967295));
});
test('can convert numeric id to numeric id', () => {
expect(NodeIdUtil.convertToNumeric(4294967295)).toBe(BigInt(4294967295));
});

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mqtt/utils/position_util.js Normal file
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class PositionUtil {
/**
* Obfuscates the provided latitude or longitude down to the provided precision in bits.
* This is based on the same logic in the official meshtastic firmware.
* https://github.com/meshtastic/firmware/blob/0a93261c0646f93aea518cc0599e547e9dc0e997/src/modules/PositionModule.cpp#L187
*/
static setPositionPrecision(latitudeOrLongitudeInteger, precision) {
// check if we should use the provided precision
if(precision > 0 && precision < 32){
// apply bitmask to reduce precision of position to wanted bits
latitudeOrLongitudeInteger = latitudeOrLongitudeInteger & (0xFFFFFFFF << (32 - precision));
// we want the imprecise position to be the middle of the possible location
latitudeOrLongitudeInteger += (1 << (31 - precision));
}
return latitudeOrLongitudeInteger;
}
/**
* Truncates the provided latitude or longitude to a maximum of x decimal places
* e.g: 12.3456789 with 2 decimal places would be 12.34
* @param latitudeOrLongitudeString e.g: 12.3456789
* @param numberOfDecimalPlaces how many decimal places to allow in the result
* @returns {*|string|null}
*/
static truncateDecimalPlaces(latitudeOrLongitudeString, numberOfDecimalPlaces) {
// ensure value not null
if(latitudeOrLongitudeString == null){
return null;
}
// split into left and right side of decimal point
// e.g: -12.3456789 -> [-12, 3456789]
var [ leftOfDecimalPoint, rightOfDecimalPoint ] = latitudeOrLongitudeString.split(".");
// check if decimal places available
if(rightOfDecimalPoint != null){
// truncate decimal places to desired length
rightOfDecimalPoint = rightOfDecimalPoint.substring(0, numberOfDecimalPlaces);
// return modified position with decimal places, if available
if(rightOfDecimalPoint.length > 0){
return [ leftOfDecimalPoint, rightOfDecimalPoint ].join(".");
}
// no decimal places available anymore, return left side without dot
return leftOfDecimalPoint;
}
// decimal places not available, return position as is
return latitudeOrLongitudeString;
}
}
module.exports = PositionUtil;

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const PositionUtil = require("./position_util");
test('can truncate string position to provided decimal places', () => {
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 0)).toBe("12");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 1)).toBe("12.3");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 2)).toBe("12.34");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 3)).toBe("12.345");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 4)).toBe("12.3456");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 5)).toBe("12.34567");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 6)).toBe("12.345678");
expect(PositionUtil.truncateDecimalPlaces("12.3456789", 7)).toBe("12.3456789");
expect(PositionUtil.truncateDecimalPlaces("12.3", 7)).toBe("12.3");
expect(PositionUtil.truncateDecimalPlaces(null, 2)).toBe(null);
expect(PositionUtil.truncateDecimalPlaces("", 2)).toBe("");
expect(PositionUtil.truncateDecimalPlaces("12", 2)).toBe("12");
expect(PositionUtil.truncateDecimalPlaces("123", 2)).toBe("123");
expect(PositionUtil.truncateDecimalPlaces("1234.", 2)).toBe("1234");
});
test('can set integer position precision to provided bits', () => {
// these tests are using the auckland sky tower position
// auckland sky tower: -36.84844007222091, 174.76221115261924
// the outputs we are expecting, are the same values returned by the code in the meshtastic firmware
// https://github.com/meshtastic/firmware/blob/0a93261c0646f93aea518cc0599e547e9dc0e997/src/modules/PositionModule.cpp#L187
// set precision to 32 bits (within 0 meters)
// -36.8484400, 174.7622111 -> -36.8484400, 174.7622111
expect(PositionUtil.setPositionPrecision(-368484400, 32)).toBe(-368484400);
expect(PositionUtil.setPositionPrecision(1747622111, 32)).toBe(1747622111);
// set precision to 16 bits (within ~364 meters)
// -36.8484400, 174.7622111 -> -36.8476160, 174.7615744
expect(PositionUtil.setPositionPrecision(-368484400, 16)).toBe(-368476160);
expect(PositionUtil.setPositionPrecision(1747622111, 16)).toBe(1747615744);
// set precision to 13 bits (within ~2.9 kilometers)
// -36.8484400, 174.7622111 -> -36.8312320, 174.7714048
expect(PositionUtil.setPositionPrecision(-368484400, 13)).toBe(-368312320);
expect(PositionUtil.setPositionPrecision(1747622111, 13)).toBe(1747714048);
// set precision to 11 bits (within ~11.6 kilometers)
// -36.8484400, 174.7622111 -> -36.8050176, 174.7976192
expect(PositionUtil.setPositionPrecision(-368484400, 11)).toBe(-368050176);
expect(PositionUtil.setPositionPrecision(1747622111, 11)).toBe(1747976192);
});