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#pragma once
#include "platform/platform.hpp"
#include "geometry/distance_on_sphere.hpp"
#include "geometry/latlon.hpp"
#include "coding/file_name_utils.hpp"
#include "base/logging.hpp"
#include "base/string_utils.hpp"
#include <fstream>
#include <functional>
#include <map>
#include <string>
#include <unordered_set>
#include <vector>
#include "boost/geometry.hpp"
#include "boost/geometry/geometries/box.hpp"
#include "boost/geometry/geometries/point.hpp"
#include "boost/geometry/index/rtree.hpp"
#include "defines.hpp"
namespace generator
{
template <typename Object>
class SponsoredObjectStorage
{
public:
using ObjectId = typename Object::ObjectId;
using ObjectsContainer = std::map<ObjectId, Object>;
using ExcludedIdsContainer = std::unordered_set<ObjectId, typename ObjectId::Hash>;
SponsoredObjectStorage(double distanceLimitMeters, size_t maxSelectedElements)
: m_distanceLimitMeters(distanceLimitMeters)
, m_maxSelectedElements(maxSelectedElements)
{
}
double GetDistanceLimitInMeters() const
{
return m_distanceLimitMeters;
}
size_t GetMaxSelectedElements() const
{
return m_maxSelectedElements;
}
ObjectsContainer const & GetObjects() const
{
return m_objects;
}
size_t Size() const
{
return m_objects.size();
}
void LoadData(std::string const & dataPath)
{
if (dataPath.empty())
return;
std::ifstream dataSource(dataPath);
if (!dataSource)
{
LOG(LERROR, ("Error while opening", dataPath, ":", strerror(errno)));
return;
}
auto const excludedIdsPath = base::JoinPath(GetPlatform().ResourcesDir(), BOOKING_EXCLUDED_FILE);
LoadData(dataSource, LoadExcludedIds(excludedIdsPath));
}
ExcludedIdsContainer LoadExcludedIds(std::string const & excludedIdsPath)
{
if (excludedIdsPath.empty())
return {};
std::ifstream source(excludedIdsPath);
if (!source)
{
LOG(LERROR, ("Error while opening", excludedIdsPath, ":", strerror(errno)));
return {};
}
ExcludedIdsContainer result;
for (std::string line; std::getline(source, line);)
{
ObjectId id{Object::InvalidObjectId()};
if (!strings::to_any(line, id.Get()))
{
LOG(LWARNING, ("Incorrect excluded sponsored id:", line));
continue;
}
if (id != Object::InvalidObjectId())
result.emplace(id);
}
return result;
}
void LoadData(std::istream & src, ExcludedIdsContainer const & excludedIds)
{
m_objects.clear();
m_rtree.clear();
for (std::string line; std::getline(src, line);)
{
Object object(line);
if (object.m_id != Object::InvalidObjectId() &&
excludedIds.find(object.m_id) == excludedIds.cend())
{
m_objects.emplace(object.m_id, object);
}
}
for (auto const & item : m_objects)
{
auto const & object = item.second;
Box b(Point(object.m_latLon.lat, object.m_latLon.lon),
Point(object.m_latLon.lat, object.m_latLon.lon));
m_rtree.insert(make_pair(b, object.m_id));
}
}
Object const & GetObjectById(ObjectId id) const
{
auto const it = m_objects.find(id);
CHECK(it != end(m_objects), ("Got wrong object id:", id));
return it->second;
}
Object & GetObjectById(ObjectId id)
{
auto const it = m_objects.find(id);
CHECK(it != end(m_objects), ("Got wrong object id:", id));
return it->second;
}
std::vector<ObjectId> GetNearestObjects(ms::LatLon const & latLon) const
{
namespace bgi = boost::geometry::index;
std::vector<ObjectId> indexes;
for_each(bgi::qbegin(m_rtree, bgi::nearest(Point(latLon.lat, latLon.lon),
static_cast<unsigned>(m_maxSelectedElements))),
bgi::qend(m_rtree), [this, &latLon, &indexes](Value const & v) {
auto const & object = GetObjectById(v.second);
double const dist = ms::DistanceOnEarth(latLon, object.m_latLon);
if (m_distanceLimitMeters != 0.0 && dist > m_distanceLimitMeters)
return;
indexes.emplace_back(v.second);
});
return indexes;
}
private:
// TODO(mgsergio): Get rid of Box since boost::rtree supports point as value type.
// TODO(mgsergio): Use mercator instead of latlon or boost::geometry::cs::spherical_equatorial
// instead of boost::geometry::cs::cartesian.
using Point = boost::geometry::model::point<float, 2, boost::geometry::cs::cartesian>;
using Box = boost::geometry::model::box<Point>;
using Value = std::pair<Box, ObjectId>;
// Create the rtree using default constructor.
boost::geometry::index::rtree<Value, boost::geometry::index::quadratic<16>> m_rtree;
ObjectsContainer m_objects;
double const m_distanceLimitMeters;
size_t const m_maxSelectedElements;
};
} // namespace generator
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