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#include "drape_frontend/overlays_tracker.hpp"
namespace df
{
void OverlaysTracker::SetTrackedOverlaysFeatures(std::vector<FeatureID> && ids)
{
m_data.clear();
for (auto const & fid : ids)
m_data.insert(std::make_pair(fid, OverlayInfo()));
}
bool OverlaysTracker::StartTracking(int zoomLevel, bool hasMyPosition,
m2::PointD const & myPosition, double gpsAccuracy)
{
if (zoomLevel < kMinZoomLevel)
{
for (auto & p : m_data)
p.second.m_status = OverlayStatus::Invisible;
return false;
}
m_zoomLevel = zoomLevel;
m_hasMyPosition = hasMyPosition;
m_myPosition = m_hasMyPosition ? myPosition : m2::PointD();
m_gpsAccuracy = m_hasMyPosition ? gpsAccuracy : 0.0;
for (auto & p : m_data)
p.second.m_tracked = false;
return true;
}
void OverlaysTracker::Track(FeatureID const & fid)
{
ASSERT_GREATER_OR_EQUAL(m_zoomLevel, kMinZoomLevel, ());
auto it = m_data.find(fid);
if (it == m_data.end())
return;
it->second.m_tracked = true;
if (it->second.m_status == OverlayStatus::Invisible)
{
it->second.m_status = OverlayStatus::Visible;
m_events.emplace_back(it->first, static_cast<uint8_t>(m_zoomLevel),
std::chrono::steady_clock::now(), m_hasMyPosition,
m_myPosition, m_gpsAccuracy);
}
}
void OverlaysTracker::FinishTracking()
{
ASSERT_GREATER_OR_EQUAL(m_zoomLevel, kMinZoomLevel, ());
for (auto & p : m_data)
{
if (p.second.m_status == OverlayStatus::Visible && !p.second.m_tracked)
{
p.second.m_status = OverlayStatus::InvisibleCandidate;
p.second.m_timestamp = std::chrono::steady_clock::now();
}
else if (p.second.m_status == OverlayStatus::InvisibleCandidate)
{
// Here we add some delay to avoid false events appearance.
static auto const kDelay = std::chrono::milliseconds(500);
if (p.second.m_tracked)
p.second.m_status = OverlayStatus::Visible;
else if (std::chrono::steady_clock::now() - p.second.m_timestamp > kDelay)
p.second.m_status = OverlayStatus::Invisible;
}
}
m_zoomLevel = -1;
}
std::list<OverlayShowEvent> OverlaysTracker::Collect()
{
std::list<OverlayShowEvent> events;
std::swap(m_events, events);
return events;
}
} // namespace df
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