WIP: report buffer — add client geolocation fetch and telemetry report builder in main.js

src/main.js

@@ -140,6 +140,50 @@ const GATEWAY_CANDIDATES = [
     "http://10.0.0.1",
 ];
 
+// --- Geolocation via API -----------------------------------------------------
+
+async function fetchGeoInfo() {
+    try {
+        const res = await fetch("https://freeipapi.com/api/json/");
+        if (!res.ok) return null;
+        return await res.json();
+    } catch {
+        return null;
+    }
+}
+
+// --- Telemetry Report --------------------------------------------------------
+
+function getClientId() {
+    const key = "netwatch_client_id";
+    let id = localStorage.getItem(key);
+    if (!id) {
+        id = crypto.randomUUID();
+        localStorage.setItem(key, id);
+    }
+    return id;
+}
+
+const clientId = getClientId();
+
+function buildReport(state) {
+    return {
+        clientId,
+        timestamp: new Date().toISOString(),
+        geo: state.geoInfo,
+        hosts: state.wan.map((h) => ({
+            name: h.name,
+            url: h.url,
+            status: h.status,
+            history: h.history.map((s) => ({
+                t: s.timestamp,
+                latency: s.latency,
+                error: s.error || null,
+            })),
+        })),
+    };
+}
+
 // --- Formatting Helpers ------------------------------------------------------
 
 function formatUTCTimestamp(date) {
@@ -269,6 +313,7 @@ class AppState {
         this.local = localHosts.map((h) => new HostState(h));
         this.paused = false;
         this.tickCount = 0;
+        this.geoInfo = null;
     }
 
     get allHosts() {
@@ -1140,6 +1185,9 @@ async function init() {
     }
 
     const state = new AppState(localHosts);
+    fetchGeoInfo().then((geo) => {
+        state.geoInfo = geo;
+    });
     buildUI(state);
     log.info("UI built, starting tick loop");
 
@@ -1194,6 +1242,11 @@ async function init() {
     doTick();
     let tickIntervalId = setInterval(doTick, CONFIG.updateInterval);
 
+    setInterval(() => {
+        if (state.tickCount > 1)
+            console.log("NetWatch report:", buildReport(state));
+    }, 60000);
+
     document
         .getElementById("interval-select")
         .addEventListener("change", (e) => {