/*
  This file is part of TALER
  Copyright (C) 2015 GNUnet e.V.

  TALER is free software; you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free Software
  Foundation; either version 3, or (at your option) any later version.

  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License along with
  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file taler-mint-httpd_test.c
 * @brief Handle /test requests; parses the POST and JSON and
 *        checks that the client is binary-compatible
 * @author Christian Grothoff
 */
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include "taler_signatures.h"
#include "taler_util.h"
#include "taler-mint-httpd_test.h"
#include "taler-mint-httpd_parsing.h"
#include "taler-mint-httpd_responses.h"


/**
 * Handle a "/test/base32" request.  Parses the JSON in the post, runs
 * the Crockford Base32 decoder on the "input" field in the JSON,
 * hashes the result and sends the hashed value back as a JSON 
 * string with in Base32 Crockford encoding.  Thus, this API
 * allows testing the hashing and Crockford encoding/decoding
 * functions.
 *
 * @param rh context of the handler
 * @param connection the MHD connection to handle
 * @param[in,out] connection_cls the connection's closure (can be updated)
 * @param upload_data upload data
 * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
 * @return MHD result code
  */
int
TMH_TEST_handler_test_base32 (struct TMH_RequestHandler *rh,
			      struct MHD_Connection *connection,
			      void **connection_cls,
			      const char *upload_data,
			      size_t *upload_data_size)
{
  json_t *json;
  int res;
  struct GNUNET_HashCode hc;
  struct TMH_PARSE_FieldSpecification spec[] = {
    TMH_PARSE_MEMBER_VARIABLE ("input"),
    TMH_PARSE_MEMBER_END
  };

  res = TMH_PARSE_post_json (connection,
                             connection_cls,
                             upload_data,
                             upload_data_size,
                             &json);
  if (GNUNET_SYSERR == res)
    return MHD_NO;
  if ( (GNUNET_NO == res) || (NULL == json) )
    return MHD_YES;
  res = TMH_PARSE_json_data (connection,
			     json,
			     spec);
  if (GNUNET_YES != res)
    return (GNUNET_NO == res) ? MHD_YES : MHD_NO;
  GNUNET_CRYPTO_hash (spec[0].destination,
		      spec[0].destination_size_out,
		      &hc);
  TMH_PARSE_release_data (spec);
  json_decref (json);
  json = TALER_json_from_data (&hc, sizeof (struct GNUNET_HashCode));
  res = TMH_RESPONSE_reply_json (connection,
				 json,
				 MHD_HTTP_OK);
  json_decref (json);
  return res;
}


/**
 * Handle a "/test" request.  Parses the JSON in the post.
 *
 * @param rh context of the handler
 * @param connection the MHD connection to handle
 * @param[in,out] connection_cls the connection's closure (can be updated)
 * @param upload_data upload data
 * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
 * @return MHD result code
  */
int
TMH_TEST_handler_test (struct TMH_RequestHandler *rh,
		       struct MHD_Connection *connection,
		       void **connection_cls,
		       const char *upload_data,
		       size_t *upload_data_size)
{
  json_t *json;
  int res;

  res = TMH_PARSE_post_json (connection,
                             connection_cls,
                             upload_data,
                             upload_data_size,
                             &json);
  if (GNUNET_SYSERR == res)
    return MHD_NO;
  if ( (GNUNET_NO == res) || (NULL == json) )
    return MHD_YES;

  json_decref (json);
  return res;
}


/* end of taler-mint-httpd_test.c */