#ifndef __IMFHeader_h__
# define __IMFHeader_h__

# include "Parser.h"
# include "MString.h"
# include <map>

namespace coreutils {

   ///
   /// IMFHeader parses a full block of IMF/MIME-style headers (RFC 5322
   /// "name: value" pairs, one per line, with folded continuation lines -
   /// any line starting with a space or tab is appended to the previous
   /// field's value) from the shared StreamReader, stopping at the blank
   /// line that terminates the header block. Resumable across any number of
   /// StreamReader::feed() calls - partially-read names/values accumulate
   /// in the name/field members rather than being discarded between calls.
   ///

   class IMFHeader : public Parser {

    public:

      IMFHeader(StreamReader &reader);

      ///
      /// Valid once doParse() has returned Status::COMPLETE - every header
      /// field parsed, keyed by field name.
      ///

      std::map<MString, MString> &getHeaders();

    protected:

      Status parse() override;

    private:

      enum State { NAME, SKIP_SPACE, FIELD, FOLD_CHECK } state = NAME;
      MString name;
      MString field;
      std::map<MString, MString> headers;

      void commitField();

   };

}

#endif