Method OpenConnection

libraries/lib-project-file-io/ProjectFileIO.cpp:487–543

! @pre *CurConn() does not exist @post *CurConn() exists or return value is false */

 @post *CurConn() exists or return value is false
 */
bool ProjectFileIO::OpenConnection(FilePath fileName /* = {}  */)
{
   auto &curConn = CurrConn();
   wxASSERT(!curConn);
   bool isTemp = false;

   if (fileName.empty())
   {
      fileName = GetFileName();
      if (fileName.empty())
      {
         fileName = TempDirectory::UnsavedProjectFileName();
         isTemp = true;
      }
   }
   else
   {
      // If this project resides in the temporary directory, then we'll mark it
      // as temporary.
      wxFileName temp(TempDirectory::TempDir(), wxT(""));
      wxFileName file(fileName);
      file.SetFullName(wxT(""));
      if (file == temp)
      {
         isTemp = true;
      }
   }

   // Pass weak_ptr to project into DBConnection constructor
   curConn = std::make_unique<DBConnection>(
      mProject.shared_from_this(), mpErrors, [this]{ OnCheckpointFailure(); } );
   auto rc = curConn->Open(fileName);
   if (rc != SQLITE_OK)
   {
      // Must use SetError() here since we do not have an active DB
      SetError(
         XO("Failed to open database file:\n\n%s").Format(fileName),
         {},
         rc
      );
      curConn.reset();
      return false;
   }

   if (!CheckVersion())
   {
      CloseConnection();
      curConn.reset();
      return false;
   }

   mTemporary = isTemp;

   SetFileName(fileName);

   return true;
}