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#include "borders_generator.hpp"
#include "osm_xml_parser.hpp"
#include "../base/std_serialization.hpp"
#include "../base/logging.hpp"
#include "../indexer/mercator.hpp"
#include "../coding/file_reader.hpp"
#include "../coding/file_writer.hpp"
#include "../coding/streams_sink.hpp"
#include "../coding/parse_xml.hpp"
#include "../std/list.hpp"
#include "../std/vector.hpp"
namespace osm
{
class BordersCreator
{
vector<m2::RegionD> & m_borders;
OsmRawData const & m_data;
m2::RegionD m_currentRegion;
public:
BordersCreator(vector<m2::RegionD> & outBorders, OsmRawData const & data)
: m_borders(outBorders), m_data(data)
{
}
void CreateFromWays(OsmWays const & ways)
{
for (OsmWays::const_iterator it = ways.begin(); it != ways.end(); ++it)
{
// clear region
m_currentRegion = m2::RegionD();
it->ForEachPoint(*this);
CHECK(m_currentRegion.IsValid(), ("Invalid region"));
m_borders.push_back(m_currentRegion);
}
}
void operator()(OsmId nodeId)
{
try
{
OsmNode node = m_data.NodeById(nodeId);
m_currentRegion.AddPoint(m2::PointD(MercatorBounds::LonToX(node.m_lon),
MercatorBounds::LatToY(node.m_lat)));
}
catch (OsmRawData::OsmInvalidIdException const & e)
{
LOG(LWARNING, (e.what()));
}
}
};
void GenerateBordersFromOsm(string const & tagAndOptValue,
string const & osmFile,
string const & outFile)
{
OsmRawData osmData;
{
FileReader file(osmFile);
ReaderSource<FileReader> source(file);
OsmXmlParser parser(osmData);
CHECK(ParseXML(source, parser), ("Invalid XML"));
}
// extract search tag key and value
size_t const delimeterPos = tagAndOptValue.find('=');
string const searchKey = tagAndOptValue.substr(0, delimeterPos);
string searchValue;
if (delimeterPos != string::npos)
searchValue = tagAndOptValue.substr(delimeterPos + 1, string::npos);
// find country borders relation
OsmIds relationIds;
if (searchValue.empty())
relationIds = osmData.RelationsByKey(searchKey);
else
relationIds = osmData.RelationsByTag(OsmTag(searchKey, searchValue));
CHECK(!relationIds.empty(), ("No relation found with tag", searchKey, searchValue));
CHECK_EQUAL(relationIds.size(), 1, ("Found more than one relation with tag",
searchKey, searchValue));
OsmRelation countryRelation = osmData.RelationById(relationIds[0]);
// get country name
string countryName;
if (!countryRelation.TagValueByKey("name:en", countryName))
countryRelation.TagValueByKey("name", countryName);
LOG(LINFO, ("Processing boundaries for country", countryName));
// find border ways
OsmIds wayIdsOuterRole = countryRelation.MembersByTypeAndRole("way", "outer");
OsmIds wayIdsNoRole = countryRelation.MembersByTypeAndRole("way", "");
// collect all ways
list<OsmWay> ways;
for(size_t i = 0; i < wayIdsOuterRole.size(); ++i)
ways.push_back(osmData.WayById(wayIdsOuterRole[i]));
for(size_t i = 0; i < wayIdsNoRole.size(); ++i)
ways.push_back(osmData.WayById(wayIdsNoRole[i]));
CHECK(!ways.empty(), ("No any ways in country border"));
// merge all collected ways
OsmWays mergedWays;
do
{
OsmId lastMergedWayId = -1; // for debugging
OsmWay merged = ways.front();
size_t lastSize = ways.size();
ways.pop_front();
// repeat until we merge everything
while (lastSize > ways.size())
{
lastSize = ways.size();
for (list<OsmWay>::iterator it = ways.begin(); it != ways.end(); ++it)
{
if (merged.MergeWith(*it))
{
lastMergedWayId = it->Id();
ways.erase(it);
break;
}
}
}
if (!merged.IsClosed())
{
LOG(LERROR, ("Way merge unsuccessful as borders are not closed. Last merged id:",
lastMergedWayId == -1 ? merged.Id() : lastMergedWayId));
}
else
{
LOG(LINFO, ("Successfully merged boundaries with points count:", merged.PointsCount()));
mergedWays.push_back(merged);
}
} while (!ways.empty());
CHECK(!mergedWays.empty(), ("No borders were generated for country:", countryName));
// save generated borders
vector<m2::RegionD> borders;
BordersCreator doCreateBorders(borders, osmData);
doCreateBorders.CreateFromWays(mergedWays);
CHECK_EQUAL(mergedWays.size(), borders.size(), ("Can't generate borders from ways"));
FileWriter writer(outFile);
stream::SinkWriterStream<Writer> stream(writer);
stream << borders;
LOG(LINFO, ("Saved", borders.size(), "border(s) for", countryName));
}
bool LoadBorders(string const & borderFile, vector<m2::RegionD> & outBorders)
{
try
{
FileReader file(borderFile);
ReaderSource<FileReader> source(file);
stream::SinkReaderStream<ReaderSource<FileReader> > stream(source);
stream >> outBorders;
CHECK(!outBorders.empty(), ("No borders were loaded from", borderFile));
}
catch (FileReader::OpenException const &)
{
return false;
}
return true;
}
}
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