Repo created

libs/indexer/caching_rank_table_loader.cpp

@@ -0,0 +1,45 @@
+#include "indexer/caching_rank_table_loader.hpp"
+
+#include "search/dummy_rank_table.hpp"
+
+#include "indexer/data_source.hpp"
+
+CachingRankTableLoader::CachingRankTableLoader(DataSource const & dataSource, std::string const & sectionName)
+  : m_dataSource(dataSource)
+  , m_sectionName(sectionName)
+{}
+
+uint8_t CachingRankTableLoader::Get(FeatureID const & featureId) const
+{
+  auto const handle = m_dataSource.GetMwmHandleById(featureId.m_mwmId);
+
+  if (!handle.IsAlive())
+    return search::RankTable::kNoRank;
+
+  auto it = m_deserializers.find(featureId.m_mwmId);
+
+  if (it == m_deserializers.end())
+  {
+    auto rankTable = search::RankTable::Load(handle.GetValue()->m_cont, m_sectionName);
+
+    if (!rankTable)
+      rankTable = std::make_unique<search::DummyRankTable>();
+
+    auto const result = m_deserializers.emplace(featureId.m_mwmId, std::move(rankTable));
+    it = result.first;
+  }
+
+  return it->second->Get(featureId.m_index);
+}
+
+void CachingRankTableLoader::OnMwmDeregistered(platform::LocalCountryFile const & localFile)
+{
+  for (auto it = m_deserializers.begin(); it != m_deserializers.end(); ++it)
+  {
+    if (it->first.IsDeregistered(localFile))
+    {
+      m_deserializers.erase(it);
+      return;
+    }
+  }
+}