Repo created

libs/kml/serdes_gpx.hpp

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+#pragma once
+
+#include "kml/types.hpp"
+
+#include "coding/parse_xml.hpp"
+#include "coding/reader.hpp"
+#include "coding/writer.hpp"
+
+#include "geometry/point_with_altitude.hpp"
+
+#include "base/exception.hpp"
+
+#include <string>
+
+namespace kml
+{
+namespace gpx
+{
+
+class GpxWriter
+{
+public:
+  DECLARE_EXCEPTION(WriteGpxException, RootException);
+
+  explicit GpxWriter(Writer & writer) : m_writer(writer) {}
+
+  void Write(FileData const & fileData);
+
+private:
+  Writer & m_writer;
+};
+
+class SerializerGpx
+{
+public:
+  DECLARE_EXCEPTION(SerializeException, RootException);
+
+  explicit SerializerGpx(FileData const & fileData) : m_fileData(fileData) {}
+
+  template <typename Sink>
+  void Serialize(Sink & sink)
+  {
+    GpxWriter gpxWriter(sink);
+    gpxWriter.Write(m_fileData);
+  }
+
+private:
+  FileData const & m_fileData;
+};
+
+class GpxParser
+{
+public:
+  explicit GpxParser(FileData & data);
+  bool Push(std::string name);
+  void AddAttr(std::string_view attr, char const * value);
+  std::string const & GetTagFromEnd(size_t n) const;
+  void Pop(std::string_view tag);
+  void CharData(std::string & value);
+  static std::optional<uint32_t> ParseColorFromHexString(std::string_view colorStr);
+
+private:
+  enum GeometryType
+  {
+    GEOMETRY_TYPE_UNKNOWN,
+    GEOMETRY_TYPE_POINT,
+    GEOMETRY_TYPE_LINE
+  };
+
+  void ResetPoint();
+  bool MakeValid();
+  void ParseColor(std::string_view colorStr);
+  void ParseGarminColor(std::string const & value);
+  void ParseOsmandColor(std::string const & value);
+  bool IsValidCoordinatesPosition() const;
+  void CheckAndCorrectTimestamps();
+
+  FileData & m_data;
+  CategoryData m_compilationData;
+  CategoryData * m_categoryData;  // never null
+
+  std::vector<std::string> m_tags;
+  GeometryType m_geometryType;
+  MultiGeometry m_geometry;
+  uint32_t m_color;
+  uint32_t m_globalColor;  // To support OSMAnd extensions with single color per GPX file
+
+  std::string m_name;
+  std::string m_description;
+  std::string m_comment;
+  PredefinedColor m_predefinedColor;
+  geometry::PointWithAltitude m_org;
+
+  double m_lat;
+  double m_lon;
+  geometry::Altitude m_altitude;
+  time_t m_timestamp;
+
+  MultiGeometry::LineT m_line;
+  MultiGeometry::TimeT m_timestamps;
+  std::string m_customName;
+  void ParseName(std::string const & value, std::string const & prevTag);
+  void ParseDescription(std::string const & value, std::string const & prevTag);
+  void ParseAltitude(std::string const & value);
+  void ParseTimestamp(std::string const & value);
+  std::string BuildDescription() const;
+};
+
+}  // namespace gpx
+
+class DeserializerGpx
+{
+public:
+  DECLARE_EXCEPTION(DeserializeException, RootException);
+
+  explicit DeserializerGpx(FileData & fileData);
+
+  template <typename ReaderType>
+  void Deserialize(ReaderType const & reader)
+  {
+    NonOwningReaderSource src(reader);
+
+    gpx::GpxParser parser(m_fileData);
+    if (!ParseXML(src, parser, true))
+    {
+      // Print corrupted GPX file for debug and restore purposes.
+      std::string gpxText;
+      reader.ReadAsString(gpxText);
+      if (!gpxText.empty() && gpxText[0] == '<')
+        LOG(LWARNING, (gpxText));
+      MYTHROW(DeserializeException, ("Could not parse GPX."));
+    }
+  }
+
+private:
+  FileData & m_fileData;
+};
+}  // namespace kml