routing/road_access.cpp - master - githubmirror/omim

routing/road_access.cpp
215 строк7 KB
Vladimir Byko-Ianko
[routing] Switching on access:conditional by preventing deserialization.
14 апр 2020, 16:19
14 апр 2020, 16:19c846e75
#include "routing/road_access.hpp"

#include "base/assert.hpp"

#include <algorithm>
#include <chrono>
#include <sstream>

using namespace std;

namespace
{
string const kNames[] = {"No", "Private", "Destination", "Yes", "Count"};

template <typename KV>
void PrintKV(ostringstream & oss, KV const & kvs, size_t maxKVToShow)
{
  size_t i = 0;
  for (auto const & kv : kvs)
  {
    if (i > 0)
      oss << ", ";
    oss << DebugPrint(kv.first) << " " << DebugPrint(kv.second);
    ++i;
    if (i == maxKVToShow)
      break;
  }
  if (kvs.size() > maxKVToShow)
    oss << ", ...";
}
}  // namespace

namespace routing
{
// RoadAccess --------------------------------------------------------------------------------------
// @TODO(bykoinako) It's a fast fix for release. The idea behind it is to remember the time of
// creation RoadAccess instance and return it instread of getting time when m_currentTimeGetter() is
// called. But it's not understadbale now why m_currentTimeGetter() is called when
// cross_mwm section is built.
RoadAccess::RoadAccess() : m_currentTimeGetter([time = GetCurrentTimestamp()]() { return time; }) {}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccess(
    uint32_t featureId, RouteWeight const & weightToFeature) const
{
  return GetAccess(featureId, m_currentTimeGetter() + weightToFeature.GetWeight());
}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccess(
    RoadPoint const & point, RouteWeight const & weightToPoint) const
{
  return GetAccess(point, m_currentTimeGetter() + weightToPoint.GetWeight());
}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccess(uint32_t featureId,
                                                                     time_t momentInTime) const
{
  auto const itConditional = m_wayToAccessConditional.find(featureId);
  // @TODO This check should be removed when access:conditional is switch on.
  CHECK(m_pointToAccessConditional.empty(),
        ("access:conditional is switched off now but m_pointToAccessConditional is not empty.",
            m_pointToAccessConditional.size()));
  if (itConditional != m_wayToAccessConditional.cend())
  {
    auto const & conditional = itConditional->second;
    for (auto const & access : conditional.GetAccesses())
    {
      auto const op = GetConfidenceForAccessConditional(momentInTime, access.m_openingHours);
      if (!op)
        continue;

      return {access.m_type, *op};
    }
  }

  return GetAccessWithoutConditional(featureId);
}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccess(RoadPoint const & point,
                                                                     time_t momentInTime) const
{
  auto const itConditional = m_pointToAccessConditional.find(point);
  // @TODO This check should be removed when access:conditional is switch on.
  CHECK(m_pointToAccessConditional.empty(),
        ("access:conditional is switched off now but m_pointToAccessConditional is not empty.",
         m_pointToAccessConditional.size()));
  if (itConditional != m_pointToAccessConditional.cend())
  {
    auto const & conditional = itConditional->second;
    for (auto const & access : conditional.GetAccesses())
    {
      auto const op = GetConfidenceForAccessConditional(momentInTime, access.m_openingHours);
      if (!op)
        continue;

      return {access.m_type, *op};
    }
  }

  return GetAccessWithoutConditional(point);
}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccessWithoutConditional(
    uint32_t featureId) const
{
  // todo(@m) This may or may not be too slow. Consider profiling this and using
  // a Bloom filter or anything else that is faster than ska::flat_hash_map
  auto const it = m_wayToAccess.find(featureId);
  if (it != m_wayToAccess.cend())
    return {it->second, Confidence::Sure};

  return {Type::Yes, Confidence::Sure};
}

pair<RoadAccess::Type, RoadAccess::Confidence> RoadAccess::GetAccessWithoutConditional(
    RoadPoint const & point) const
{
  auto const it = m_pointToAccess.find(point);
  if (it != m_pointToAccess.cend())
    return {it->second, Confidence::Sure};

  return {Type::Yes, Confidence::Sure};
}

bool RoadAccess::operator==(RoadAccess const & rhs) const
{
  return m_wayToAccess == rhs.m_wayToAccess && m_pointToAccess == rhs.m_pointToAccess &&
         m_wayToAccessConditional == rhs.m_wayToAccessConditional &&
         m_pointToAccessConditional == rhs.m_pointToAccessConditional;
}

// static
optional<RoadAccess::Confidence> RoadAccess::GetConfidenceForAccessConditional(
    time_t momentInTime, osmoh::OpeningHours const & openingHours)
{
  auto const left = momentInTime - kConfidenceIntervalSeconds / 2;
  auto const right = momentInTime + kConfidenceIntervalSeconds / 2;

  auto const leftOpen = openingHours.IsOpen(left);
  auto const rightOpen = openingHours.IsOpen(right);

  if (!leftOpen && !rightOpen)
    return nullopt;

  return leftOpen && rightOpen ? Confidence::Sure : Confidence::Maybe;
}

// Functions ---------------------------------------------------------------------------------------
time_t GetCurrentTimestamp()
{
  using system_clock = chrono::system_clock;
  return system_clock::to_time_t(system_clock::now());
}

string ToString(RoadAccess::Type type)
{
  if (type <= RoadAccess::Type::Count)
    return kNames[static_cast<size_t>(type)];
  ASSERT(false, ("Bad road access type", static_cast<size_t>(type)));
  return "Bad RoadAccess::Type";
}

void FromString(string const & s, RoadAccess::Type & result)
{
  for (size_t i = 0; i <= static_cast<size_t>(RoadAccess::Type::Count); ++i)
  {
    if (s == kNames[i])
    {
      result = static_cast<RoadAccess::Type>(i);
      return;
    }
  }
  result = RoadAccess::Type::Count;
  CHECK(false, ("Could not read RoadAccess from the string", s));
}

string DebugPrint(RoadAccess::Conditional const & conditional)
{
  stringstream ss;
  ss << " { ";
  for (auto const & access : conditional.GetAccesses())
  {
    ss << DebugPrint(access.m_type) << " @ (" << access.m_openingHours.GetRule() << "), ";
  }
  ss << " } ";
  return ss.str();
}

string DebugPrint(RoadAccess::Confidence confidence)
{
  switch (confidence)
  {
  case RoadAccess::Confidence::Maybe: return "Maybe";
  case RoadAccess::Confidence::Sure: return "Sure";
  }
  UNREACHABLE();
}

string DebugPrint(RoadAccess::Type type) { return ToString(type); }

string DebugPrint(RoadAccess const & r)
{
  size_t const kMaxIdsToShow = 10;
  ostringstream oss;
  oss << "WayToAccess { FeatureTypes [";
  PrintKV(oss, r.GetWayToAccess(), kMaxIdsToShow);
  oss << "], PointToAccess [";
  PrintKV(oss, r.GetPointToAccess(), kMaxIdsToShow);
  oss << "], WayToAccessConditional [";
  PrintKV(oss, r.GetWayToAccessConditional(), kMaxIdsToShow);
  oss << "], PointToAccessConditional [";
  PrintKV(oss, r.GetPointToAccessConditional(), kMaxIdsToShow);
  oss << "] }";
  return oss.str();
}
}  // namespace routing