Repo created

libs/ge0/geo_url_parser.hpp

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+#pragma once
+
+#include "coding/url.hpp"
+
+#include <string>
+
+#include <boost/regex.hpp>
+
+namespace geo
+{
+
+class GeoURLInfo
+{
+public:
+  GeoURLInfo();
+
+  bool IsLatLonValid() const;
+  void Reset();
+
+  void SetZoom(double x);
+  bool SetLat(double x);
+  bool SetLon(double x);
+
+  double m_lat;
+  double m_lon;
+  double m_zoom;
+  std::string m_query;
+  std::string m_label;
+};
+
+class DoubleGISParser
+{
+public:
+  DoubleGISParser();
+  bool Parse(url::Url const & url, GeoURLInfo & info) const;
+
+private:
+  boost::regex m_pathRe;
+  boost::regex m_paramRe;
+};
+
+class OpenStreetMapParser
+{
+public:
+  OpenStreetMapParser();
+  bool Parse(url::Url const & url, GeoURLInfo & info) const;
+
+private:
+  boost::regex m_regex;
+};
+
+class LatLonParser
+{
+public:
+  LatLonParser();
+  void Reset(url::Url const & url, GeoURLInfo & info);
+
+  bool IsValid() const;
+  void operator()(std::string name, std::string const & value);
+
+private:
+  // Usually (lat, lon), but some providers use (lon, lat).
+  static int constexpr kLLPriority = 5;
+  // We do not try to guess the projection and do not interpret (x, y)
+  // as Mercator coordinates in URLs. We simply use (y, x) for (lat, lon).
+  static int constexpr kXYPriority = 6;
+  static int constexpr kLatLonPriority = 7;
+
+  // Priority for accepting coordinates if we have many choices.
+  // -1 - not initialized
+  //  0 - coordinates in path;
+  //  x - priority for query type (greater is better)
+  static int GetCoordinatesPriority(std::string const & token);
+
+  GeoURLInfo * m_info;
+  bool m_swapLatLon;
+  boost::regex m_regexp;
+  int m_latPriority;
+  int m_lonPriority;
+};
+
+class GeoParser
+{
+public:
+  GeoParser();
+  bool Parse(std::string const & url, GeoURLInfo & info) const;
+
+private:
+  boost::regex m_latlonRe;
+  boost::regex m_zoomRe;
+};
+
+class UnifiedParser
+{
+public:
+  bool Parse(std::string const & url, GeoURLInfo & info);
+
+private:
+  GeoParser m_geoParser;
+  DoubleGISParser m_dgParser;
+  OpenStreetMapParser m_osmParser;
+  LatLonParser m_llParser;
+};
+
+}  // namespace geo