////////////////////////////////////////////////////////////////////////////////
/// @brief fulltext query functionality
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#ifndef ARANGODB_FULLTEXT_INDEX_FULLTEXT__QUERY_H
#define ARANGODB_FULLTEXT_INDEX_FULLTEXT__QUERY_H 1

#include "Basics/Common.h"

// -----------------------------------------------------------------------------
// --SECTION--                                                   private defines
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief maximum number of search words in a query
////////////////////////////////////////////////////////////////////////////////

#define TRI_FULLTEXT_SEARCH_MAX_WORDS 32

// -----------------------------------------------------------------------------
// --SECTION--                                                      public types
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief fulltext query match options
////////////////////////////////////////////////////////////////////////////////

typedef enum {
  TRI_FULLTEXT_COMPLETE,
  TRI_FULLTEXT_PREFIX,
  TRI_FULLTEXT_SUBSTRING   // currently not implemented, maybe later
}
TRI_fulltext_query_match_e;

////////////////////////////////////////////////////////////////////////////////
/// @brief fulltext query logical operators
////////////////////////////////////////////////////////////////////////////////

typedef enum {
  TRI_FULLTEXT_AND,
  TRI_FULLTEXT_OR,
  TRI_FULLTEXT_EXCLUDE
}
TRI_fulltext_query_operation_e;

////////////////////////////////////////////////////////////////////////////////
/// @brief fulltext query
////////////////////////////////////////////////////////////////////////////////

typedef struct TRI_fulltext_query_s {
  size_t                          _numWords;
  char**                          _words;
  TRI_fulltext_query_match_e*     _matches;
  TRI_fulltext_query_operation_e* _operations;
  size_t                          _maxResults;
}
TRI_fulltext_query_t;

// -----------------------------------------------------------------------------
// --SECTION--                                        constructors / destructors
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief create a fulltext query
////////////////////////////////////////////////////////////////////////////////

TRI_fulltext_query_t* TRI_CreateQueryFulltextIndex (size_t, size_t);

////////////////////////////////////////////////////////////////////////////////
/// @brief free a fulltext query
////////////////////////////////////////////////////////////////////////////////

void TRI_FreeQueryFulltextIndex (TRI_fulltext_query_t*);

// -----------------------------------------------------------------------------
// --SECTION--                                                  public functions
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief create a fulltext query from a query string
////////////////////////////////////////////////////////////////////////////////

int TRI_ParseQueryFulltextIndex (TRI_fulltext_query_t*,
                                 char const*,
                                 bool*);

////////////////////////////////////////////////////////////////////////////////
/// @brief set a search word & option for a query
/// the query will take ownership of the search word
/// the caller must not free the word itself
////////////////////////////////////////////////////////////////////////////////

bool TRI_SetQueryFulltextIndex (TRI_fulltext_query_t*,
                                size_t,
                                char const*,
                                size_t,
                                TRI_fulltext_query_match_e,
                                TRI_fulltext_query_operation_e);

#endif

// -----------------------------------------------------------------------------
// --SECTION--                                                       END-OF-FILE
// -----------------------------------------------------------------------------

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