IQ.Pilot Release Commit @ b6534c0

iqpilot/tools/jotpluggler/map.h

@@ -0,0 +1,61 @@
+#pragma once
+
+#include <condition_variable>
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+
+struct GpsTrace;
+struct GeoBounds {
+  double south = 0.0;
+  double west = 0.0;
+  double north = 0.0;
+  double east = 0.0;
+
+  bool valid() const {
+    return south < north && west < east;
+  }
+};
+
+struct RouteBasemap;
+struct MapCacheStats {
+  uint64_t bytes = 0;
+  size_t files = 0;
+};
+
+class MapDataManager {
+public:
+  MapDataManager();
+  ~MapDataManager();
+
+  MapDataManager(const MapDataManager &) = delete;
+  MapDataManager &operator=(const MapDataManager &) = delete;
+
+  void pump();
+  void ensureTrace(const GpsTrace &trace);
+  void clearCache();
+  bool loading() const;
+  const RouteBasemap *current() const;
+  MapCacheStats cacheStats() const;
+
+private:
+  struct Request {
+    std::string key;
+    GeoBounds bounds;
+    std::string query;
+  };
+
+  void run();
+
+  mutable std::mutex mutex_;
+  std::condition_variable cv_;
+  bool stopping_ = false;
+  std::unique_ptr<Request> pending_;
+  std::unique_ptr<Request> active_;
+  std::unique_ptr<RouteBasemap> completed_;
+  std::unique_ptr<RouteBasemap> current_;
+  std::thread worker_;
+};