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#include "map/traffic_manager.hpp"
#include "routing/routing_helpers.hpp"
#include "drape_frontend/drape_engine.hpp"
#include "indexer/scales.hpp"
TrafficManager::TrafficManager(Index const & index,
GetMwmsByRectFn const & getMwmsByRectFn)
: m_isEnabled(true) //TODO: true is temporary
, m_index(index)
, m_getMwmsByRectFn(getMwmsByRectFn)
, m_isRunning(true)
, m_thread(&TrafficManager::ThreadRoutine, this)
{
CHECK(m_getMwmsByRectFn != nullptr, ());
}
TrafficManager::~TrafficManager()
{
{
lock_guard<mutex> lock(m_requestedMwmsLock);
m_isRunning = false;
}
m_condition.notify_one();
m_thread.join();
}
void TrafficManager::SetEnabled(bool enabled)
{
m_isEnabled = enabled;
}
void TrafficManager::SetDrapeEngine(ref_ptr<df::DrapeEngine> engine)
{
m_drapeEngine = engine;
}
void TrafficManager::UpdateViewport(ScreenBase const & screen)
{
if (!m_isEnabled)
return;
// Request traffic.
auto mwms = m_getMwmsByRectFn(screen.ClipRect());
// TODO: request new mwms, update old ones by timer.
for (auto const & mwm : mwms)
RequestTrafficData(mwm);
// TODO: Remove some mwm's from cache.
//MwmSet::MwmId mwmId;
//m_drapeEngine->ClearTrafficCache(mwmId);
}
void TrafficManager::UpdateMyPosition(MyPosition const & myPosition)
{
if (!m_isEnabled)
return;
// 1. Determine mwm's nearby "my position".
// 2. Request traffic for this mwm's.
// 3. Do all routing stuff.
}
void TrafficManager::CalculateSegmentsGeometry(traffic::TrafficInfo const & trafficInfo,
df::TrafficSegmentsGeometry & output) const
{
size_t const coloringSize = trafficInfo.GetColoring().size();
output.reserve(coloringSize);
vector<FeatureID> features;
features.reserve(coloringSize);
for (auto const & c : trafficInfo.GetColoring())
features.emplace_back(trafficInfo.GetMwmId(), c.first.m_fid);
int constexpr kScale = scales::GetUpperScale();
unordered_map<uint32_t, m2::PolylineD> polylines;
auto featureReader = [&polylines](FeatureType & ft)
{
uint32_t const fid = ft.GetID().m_index;
if (polylines.find(fid) != polylines.end())
return;
if (routing::IsRoad(feature::TypesHolder(ft)))
{
m2::PolylineD polyline;
ft.ForEachPoint([&polyline](m2::PointD const & pt) { polyline.Add(pt); }, kScale);
if (polyline.GetSize() != 0)
polylines[fid] = polyline;
}
};
m_index.ReadFeatures(featureReader, features);
for (auto const & c : trafficInfo.GetColoring())
{
auto it = polylines.find(c.first.m_fid);
if (it == polylines.end())
continue;
bool const isReversed = (c.first.m_dir == traffic::TrafficInfo::RoadSegmentId::kReverseDirection);
output.emplace_back(df::TrafficSegmentID(trafficInfo.GetMwmId(), c.first),
it->second.ExtractSegment(c.first.m_idx, isReversed));
}
}
void TrafficManager::CalculateSegmentsColoring(traffic::TrafficInfo const & trafficInfo,
df::TrafficSegmentsColoring & output) const
{
for (auto const & c : trafficInfo.GetColoring())
{
df::TrafficSegmentID const sid (trafficInfo.GetMwmId(), c.first);
output.emplace_back(sid, c.second);
}
}
void TrafficManager::ThreadRoutine()
{
vector<MwmSet::MwmId> mwms;
while (WaitForRequest(mwms))
{
for (auto const & mwm : mwms)
{
traffic::TrafficInfo info(mwm);
if (info.ReceiveTrafficData("Russia_Moscow.traff")) // TODO: temporary name
OnTrafficDataResponse(info);
else
LOG(LDEBUG, ("Traffic request failed. Mwm =", mwm));
}
mwms.clear();
}
}
bool TrafficManager::WaitForRequest(vector<MwmSet::MwmId> & mwms)
{
unique_lock<mutex> lock(m_requestedMwmsLock);
m_condition.wait(lock, [this] { return !m_isRunning || !m_requestedMwms.empty(); });
if (!m_isRunning)
return false;
mwms.swap(m_requestedMwms);
return true;
}
void TrafficManager::RequestTrafficData(MwmSet::MwmId const & mwmId)
{
lock_guard<mutex> lock(m_requestedMwmsLock);
m_requestedMwms.push_back(mwmId);
m_condition.notify_one();
}
void TrafficManager::OnTrafficDataResponse(traffic::TrafficInfo const & info)
{
// Cache geometry for rendering if it's necessary.
if (m_mwmIds.find(info.GetMwmId()) == m_mwmIds.end())
{
df::TrafficSegmentsGeometry geometry;
CalculateSegmentsGeometry(info, geometry);
m_mwmIds.insert(info.GetMwmId());
m_drapeEngine->CacheTrafficSegmentsGeometry(geometry);
}
// Update traffic colors.
df::TrafficSegmentsColoring coloring;
CalculateSegmentsColoring(info, coloring);
m_drapeEngine->UpdateTraffic(coloring);
}
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