File_Connection_Builder.h

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#ifndef joedb_File_Connection_Builder_declared
#define joedb_File_Connection_Builder_declared
 
#include "joedb/ui/Connection_Builder.h"
#include "joedb/ui/File_Parser.h"
#include "joedb/concurrency/File_Connection.h"
 
#include <iostream>
 
namespace joedb
{
 /// @ingroup ui
 class File_Connection_Builder: public Connection_Builder
 {
  private:
   File_Parser file_parser;
   std::optional<Readonly_Journal> readonly_journal;
   std::optional<Writable_Journal> writable_journal;
   std::unique_ptr<Connection> connection;
 
  public:
   const char *get_name() const override {return "file";}
 
   const char *get_parameters_description() const override
   {
    return "<file>";
   }
 
   Connection *build(Arguments &arguments, Buffered_File *file) override
   {
    std::ostream null_stream(nullptr);
 
    if (file_parser.parse(null_stream, arguments))
    {
     if (file_parser.get_file()->is_readonly())
     {
      readonly_journal.emplace(*file_parser.get_file());
      connection.reset(new Pullonly_Journal_Connection(*readonly_journal));
     }
     else
     {
      writable_journal.emplace(*file_parser.get_file());
      connection.reset(new Journal_Connection(*writable_journal));
     }
    }
 
    return connection.get();
   }
 };
}
 
#endif