Initial commit: add Location Plotter

src/RinexNavigation.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "SatelliteData.h"
+
+#include <QDateTime>
+#include <QNetworkAccessManager>
+#include <QObject>
+#include <QVector>
+#include <QTimer>
+
+class RinexNavigation : public QObject {
+    Q_OBJECT
+
+public:
+    explicit RinexNavigation(QObject *parent = nullptr);
+
+    void refresh();
+    [[nodiscard]] bool isLoading() const { return m_loading; }
+
+    static QVector<SatellitePosition> parseGpsNavigation(
+        const QByteArray &rinex, const QDateTime &whenUtc, QString *error = nullptr);
+
+signals:
+    void satellitesUpdated(const QVector<SatellitePosition> &satellites);
+    void satelliteMotionUpdated(const QVector<SatellitePosition> &current,
+                                const QVector<SatellitePosition> &next,
+                                int durationMs);
+    void statusChanged(const QString &status, bool error);
+
+private:
+    void requestDay(const QDate &date, int fallbackIndex);
+    void handleDownload(const QByteArray &compressed, const QDate &date, int fallbackIndex);
+    bool loadCache();
+    QString cachePath() const;
+    void updateCurrentPositions();
+    void publishCurrentMotion();
+
+    QNetworkAccessManager m_network;
+    QTimer m_positionTimer;
+    QByteArray m_latestRinex;
+    bool m_loading = false;
+};