added refference point

app/src/main/java/com/grigowashere/loratester/ReferencePointRecorder.java

@@ -6,6 +6,7 @@ import android.util.Log;
 
 import com.grigowashere.loratester.api.ServerApi;
 import com.grigowashere.loratester.location.GeoUtils;
+import com.grigowashere.loratester.model.RadioSnapshot;
 import com.grigowashere.loratester.net.NetworkMonitor;
 import com.grigowashere.loratester.telnet.StatsExtractor;
 
@@ -46,8 +47,12 @@ public class ReferencePointRecorder {
     private final List<Map<String, Object>> buffer = new ArrayList<>();
 
     private volatile boolean recording;
+    private volatile boolean rotating;
     private volatile long sessionId = -1;
     private volatile int sampleCount;
+    private volatile int segmentIndex = 1;
+    private volatile String baseLabel;
+    private volatile String lastParamSignature;
     private ScheduledFuture<?> sampleTask;
     private ScheduledFuture<?> flushTask;
     private Listener listener;
@@ -111,6 +116,10 @@ public class ReferencePointRecorder {
                 }
                 sessionId = id;
                 sampleCount = 0;
+                segmentIndex = 1;
+                baseLabel = label;
+                lastParamSignature = null;
+                rotating = false;
                 recording = true;
                 startTimers();
                 notifyState();
@@ -173,6 +182,16 @@ public class ReferencePointRecorder {
             return;
         }
         StatsExtractor.ExtractedStats stats = uploader.getLastStats();
+        String signature = paramSignature(stats);
+        if (signature != null) {
+            String prev = lastParamSignature;
+            if (prev == null) {
+                lastParamSignature = signature;
+            } else if (!prev.equals(signature)) {
+                requestRotate(signature);
+                return;
+            }
+        }
         Double lat = validLat();
         Double lon = validLon();
         if (stats == null && (lat == null || lon == null)) {
@@ -194,6 +213,77 @@ public class ReferencePointRecorder {
         notifyState();
     }
 
+    private void requestRotate(String newSignature) {
+        if (rotating || !recording) {
+            return;
+        }
+        rotating = true;
+        executor.execute(() -> rotateSession(newSignature));
+    }
+
+    private void rotateSession(String newSignature) {
+        if (!recording) {
+            rotating = false;
+            return;
+        }
+        flush();
+        try {
+            if (sessionId > 0) {
+                serverApi.finishReferencePointSession(sessionId);
+            }
+            Double lat = validLat();
+            Double lon = validLon();
+            segmentIndex++;
+            String nextLabel = (baseLabel == null || baseLabel.isBlank()
+                    ? "Репер"
+                    : baseLabel) + " #" + segmentIndex;
+            long nextId = serverApi.startReferencePointSession(deviceId, nextLabel, lat, lon);
+            synchronized (buffer) {
+                buffer.clear();
+            }
+            sessionId = nextId;
+            sampleCount = 0;
+            lastParamSignature = newSignature;
+            notifyState();
+        } catch (Exception e) {
+            Log.w(TAG, "rotate reference point failed", e);
+            notifyError(e.getMessage() != null ? e.getMessage() : "reference rotate failed");
+        } finally {
+            rotating = false;
+        }
+    }
+
+    private static String paramSignature(StatsExtractor.ExtractedStats stats) {
+        if (stats == null || stats.metaJson == null) {
+            return null;
+        }
+        RadioSnapshot snap = RadioSnapshot.fromExtracted(stats);
+        if (snap.frequencyMhz == null
+                && snap.sf == null
+                && snap.bwKhz == null
+                && snap.powerDbm == null
+                && snap.codeRate == null
+                && snap.preambleLength == null
+                && snap.txTimeoutMs == null
+                && snap.crcEnabled == null
+                && snap.role == null) {
+            return null;
+        }
+        return "role=" + value(snap.role)
+                + "|fq=" + value(snap.frequencyMhz)
+                + "|sf=" + value(snap.sf)
+                + "|bw=" + value(snap.bwKhz)
+                + "|pw=" + value(snap.powerDbm)
+                + "|cr=" + value(snap.codeRate)
+                + "|pl=" + value(snap.preambleLength)
+                + "|tm=" + value(snap.txTimeoutMs)
+                + "|crc=" + value(snap.crcEnabled);
+    }
+
+    private static String value(Object value) {
+        return value != null ? String.valueOf(value) : "";
+    }
+
     private void flush() {
         if (sessionId <= 0 || networkMonitor != null && !networkMonitor.isOnline()) {
             return;