////////////////////////////////////////////////////////////////////////////////
/// @brief edges request handler
///
/// @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 Michael Hackstein
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2010-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#ifndef ARANGODB_REST_HANDLER_REST_EDGES_HANDLER_H
#define ARANGODB_REST_HANDLER_REST_EDGES_HANDLER_H 1

#include "Basics/Common.h"

#include "RestHandler/RestVocbaseBaseHandler.h"

// -----------------------------------------------------------------------------
// --SECTION--                                                  RestEdgesHandler
// -----------------------------------------------------------------------------

namespace triagens {
  namespace arango {

// -----------------------------------------------------------------------------
// --SECTION--                                              forward declarations
// -----------------------------------------------------------------------------

    namespace traverser {
      class TraverserExpression;
    }
// -----------------------------------------------------------------------------
// --SECTION--                                      constructors and destructors
// -----------------------------------------------------------------------------

    class RestEdgesHandler : public RestVocbaseBaseHandler {

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


      public:

////////////////////////////////////////////////////////////////////////////////
/// @brief constructor
////////////////////////////////////////////////////////////////////////////////

        explicit RestEdgesHandler (rest::HttpRequest*);

// -----------------------------------------------------------------------------
// --SECTION--                                                   Handler methods
// -----------------------------------------------------------------------------

      public:

////////////////////////////////////////////////////////////////////////////////
/// {@inheritDoc}
////////////////////////////////////////////////////////////////////////////////

        status_t execute () override final;

// -----------------------------------------------------------------------------
// --SECTION--                                                 protected methods
// -----------------------------------------------------------------------------


      protected:

////////////////////////////////////////////////////////////////////////////////
/// @brief reads all edges in given direction for given vertex
///        Uses the TraverserExpression for filtering.
///        Might be nullptr for no filtering
////////////////////////////////////////////////////////////////////////////////

        bool readEdges (std::vector<traverser::TraverserExpression*> const&);

////////////////////////////////////////////////////////////////////////////////
/// @brief reads all edges in given direction for given vertex
///        Also parses the body into an TraverserExpression
////////////////////////////////////////////////////////////////////////////////

        bool readFilteredEdges ();

////////////////////////////////////////////////////////////////////////////////
/// @brief reads all edges in given direction for a given list of vertices
////////////////////////////////////////////////////////////////////////////////

        bool readEdgesForMultipleVertices ();

 ////////////////////////////////////////////////////////////////////////////////
/// @brief get all edges for a given vertex. Independent from the request
////////////////////////////////////////////////////////////////////////////////

        bool getEdgesForVertex (std::string const& id,
                                std::vector<traverser::TraverserExpression*> const& expressions,
                                TRI_edge_direction_e direction,
                                SingleCollectionReadOnlyTransaction& trx,
                                triagens::basics::Json& result,
                                size_t& scannedIndex,
                                size_t& filtered);

    };

  }
}

#endif