New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/storage/map_files_downloader_with_ping.cpp

@@ -0,0 +1,27 @@
+#include "storage/map_files_downloader_with_ping.hpp"
+
+#include "storage/pinger.hpp"
+
+#include "platform/platform.hpp"
+
+#include "base/assert.hpp"
+
+namespace storage
+{
+void MapFilesDownloaderWithPing::GetMetaConfig(MetaConfigCallback const & callback)
+{
+  ASSERT(callback , ());
+
+  MetaConfig metaConfig = LoadMetaConfig();
+  CHECK(!metaConfig.m_serversList.empty(), ());
+
+  // Sort the list of servers by latency.
+  /// @todo(pastk:: actually the sort order is used only in MapFilesDownloader::DownloadAsString()
+  /// to get e.g. countries.txt but this code is not enabled at the moment.
+  auto const sorted = Pinger::ExcludeUnavailableAndSortEndpoints(metaConfig.m_serversList);
+  // Keep the original list if all servers are unavailable.
+  if (!sorted.empty())
+    metaConfig.m_serversList = sorted;
+  callback(metaConfig);
+}
+}  // namespace storage