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Merge pull request #64 from mrwish7/main

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TX search sporadic E mode
This commit is contained in:
Marek Farkaš
2024-07-15 20:44:54 +02:00
committed by GitHub
parent cfbc71f3e9 d7fa74f671
commit 56c8b98e9c
1 changed files with 40 additions and 1 deletions
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41
server/tx_search.js
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@@ -6,6 +6,9 @@ let cachedData = {};
let lastFetchTime = 0; let lastFetchTime = 0;
const fetchInterval = 3000; const fetchInterval = 3000;
const esSwitchCache = {"lastCheck":0, "esSwitch":false};
const esFetchInterval = 300000;
// Fetch data from maps // Fetch data from maps
function fetchTx(freq, piCode, rdsPs) { function fetchTx(freq, piCode, rdsPs) {
const now = Date.now(); const now = Date.now();
@@ -46,6 +49,7 @@ function processData(data, piCode, rdsPs) {
let maxScore = -Infinity; // Initialize maxScore with a very low value let maxScore = -Infinity; // Initialize maxScore with a very low value
let txAzimuth; let txAzimuth;
let maxDistance; let maxDistance;
let esMode = checkEs();
for (const cityId in data.locations) { for (const cityId in data.locations) {
const city = data.locations[cityId]; const city = data.locations[cityId];
@@ -53,7 +57,11 @@ function processData(data, piCode, rdsPs) {
for (const station of city.stations) { for (const station of city.stations) {
if (station.pi === piCode.toUpperCase() && !station.extra && station.ps && station.ps.toLowerCase().includes(rdsPs.replace(/ /g, '_').replace(/^_*(.*?)_*$/, '$1').toLowerCase())) { if (station.pi === piCode.toUpperCase() && !station.extra && station.ps && station.ps.toLowerCase().includes(rdsPs.replace(/ /g, '_').replace(/^_*(.*?)_*$/, '$1').toLowerCase())) {
const distance = haversine(serverConfig.identification.lat, serverConfig.identification.lon, city.lat, city.lon); const distance = haversine(serverConfig.identification.lat, serverConfig.identification.lon, city.lat, city.lon);
const score = (10*Math.log10(station.erp*1000)) / distance.distanceKm; // Calculate score let weightDistance = distance.distanceKm
if (esMode && (distance.distanceKm > 200)) {
weightDistance = Math.abs(distance.distanceKm-1500);
}
const score = (10*Math.log10(station.erp*1000)) / weightDistance; // Calculate score
if (score > maxScore) { if (score > maxScore) {
maxScore = score; maxScore = score;
txAzimuth = distance.azimuth; txAzimuth = distance.azimuth;
@@ -82,6 +90,37 @@ function processData(data, piCode, rdsPs) {
} }
} }
function checkEs() {
const now = Date.now();
const url = "https://fmdx.org/includes/tools/get_muf.php";
let esSwitch = false;
if (now - esSwitchCache.lastCheck < esFetchInterval) {
esSwitch = esSwitchCache.esSwitch;
} else {
esSwitchCache.lastCheck = now;
fetch(url)
.then(response => response.json())
.then(data => {
if (serverConfig.identification.lon < -32) {
if (data.north_america.max_frequency != "No data") {
esSwitch = true;
}
} else {
if (data.europe.max_frequency != "No data") {
esSwitch = true;
}
}
esSwitchCache.esSwitch = esSwitch;
})
.catch(error => {
console.error("Error fetching data:", error);
});
}
return esSwitch;
}
function haversine(lat1, lon1, lat2, lon2) { function haversine(lat1, lon1, lat2, lon2) {
const R = 6371; // Earth radius in kilometers const R = 6371; // Earth radius in kilometers
const dLat = deg2rad(lat2 - lat1); const dLat = deg2rad(lat2 - lat1);