File size: 4,074 Bytes
964569f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | function isObject(value) {
return value !== null && typeof value === "object" && !Array.isArray(value);
}
function toNullableNumber(value) {
if (value === null || value === undefined || value === "") {
return null;
}
if (typeof value === "number" && Number.isFinite(value)) {
return value;
}
if (typeof value === "string") {
const parsed = Number(value);
return Number.isFinite(parsed) ? parsed : null;
}
return null;
}
function toNullableBoolean(value) {
if (value === null || value === undefined || value === "") {
return null;
}
if (typeof value === "boolean") {
return value;
}
if (typeof value === "number") {
if (value === 1) {
return true;
}
if (value === 0) {
return false;
}
}
if (typeof value === "string") {
const lower = value.trim().toLowerCase();
if (["true", "1", "yes", "on"].includes(lower)) {
return true;
}
if (["false", "0", "no", "off"].includes(lower)) {
return false;
}
}
return null;
}
function normalizeTimestamp(payload) {
const raw =
payload.sourceTs ||
payload.timestamp ||
payload.ts ||
payload.time ||
payload.occurredAt ||
null;
if (raw === null) {
return new Date();
}
const date = new Date(raw);
if (!Number.isNaN(date.getTime())) {
return date;
}
const asNumber = Number(raw);
if (Number.isFinite(asNumber)) {
const millis = asNumber > 1e12 ? asNumber : asNumber * 1000;
const fromMillis = new Date(millis);
if (!Number.isNaN(fromMillis.getTime())) {
return fromMillis;
}
}
return new Date();
}
function validateAndNormalizeTelemetry(topicInfo, payload) {
const errors = [];
if (!isObject(payload)) {
return {
valid: false,
errors: ["Payload must be a JSON object"],
normalized: null,
};
}
const env = isObject(payload.env) ? payload.env : {};
const gas = isObject(payload.gas) ? payload.gas : {};
const motion = isObject(payload.motion) ? payload.motion : {};
const gpsCandidate = isObject(payload.gps)
? payload.gps
: isObject(payload.location)
? payload.location
: {};
const statusCandidate = isObject(payload.status)
? payload.status
: isObject(payload.system)
? payload.system
: {};
const temperatureC = toNullableNumber(env.temperatureC);
const gasRaw = toNullableNumber(gas.mq2Raw);
const shock = toNullableBoolean(motion.shock);
if (temperatureC === null) {
errors.push("env.temperatureC must be a number");
}
if (gasRaw === null) {
errors.push("gas.mq2Raw must be a number");
}
if (shock === null) {
errors.push("motion.shock must be a boolean");
}
if (payload.truckId && String(payload.truckId) !== String(topicInfo.truckCode)) {
errors.push("Payload truckId does not match topic truck segment");
}
if (
payload.containerId &&
String(payload.containerId) !== String(topicInfo.containerCode)
) {
errors.push("Payload containerId does not match topic container segment");
}
const normalized = {
seq: Math.max(0, Math.trunc(toNullableNumber(payload.seq) || 0)),
sourceTs: normalizeTimestamp(payload).toISOString(),
gpsLat: toNullableNumber(gpsCandidate.lat),
gpsLon: toNullableNumber(gpsCandidate.lon),
speedKph: toNullableNumber(gpsCandidate.speedKph),
temperatureC,
humidityPct: toNullableNumber(env.humidityPct),
pressureHpa: toNullableNumber(env.pressureHpa),
tiltDeg: toNullableNumber(motion.tiltDeg),
shock: Boolean(shock),
gasRaw,
gasAlert: Boolean(toNullableBoolean(gas.alert)),
sdOk: toNullableBoolean(statusCandidate.sdOk),
gpsFix:
toNullableBoolean(statusCandidate.gpsFix) ??
toNullableBoolean(gpsCandidate.gpsFix) ??
toNullableBoolean(payload.gpsFix),
uplink: statusCandidate.uplink ? String(statusCandidate.uplink) : "unknown",
rawPayload: payload,
};
return {
valid: errors.length === 0,
errors,
normalized,
};
}
module.exports = {
validateAndNormalizeTelemetry,
};
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