/* delete.c - Delete a key.
   Copyright (C) 2001, 2002 g10 Code GmbH

   This file is part of GPGME.
 
   GPGME is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   GPGME 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
   General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with GPGME; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>

#include "util.h"
#include "context.h"
#include "ops.h"
#include "key.h"


enum delete_problem
  {
    DELETE_No_Problem = 0,
    DELETE_No_Such_Key = 1,
    DELETE_Must_Delete_Secret_Key = 2,
    DELETE_Ambiguous_Specification = 3
  };


struct delete_result_s
{
  enum delete_problem problem;
};


void
_gpgme_release_delete_result (DeleteResult result)
{
  if (!result)
    return;
  free (result);
}


static GpgmeError
delete_status_handler (GpgmeCtx ctx, GpgmeStatusCode code, char *args)
{
  test_and_allocate_result (ctx, delete);

  switch (code)
    {
    case GPGME_STATUS_EOF:
      switch (ctx->result.delete->problem)
	{
	case DELETE_No_Problem:
	  break;
	case DELETE_No_Such_Key:
	  return GPGME_Invalid_Key;
	  break;
	case DELETE_Must_Delete_Secret_Key:
	  return GPGME_Conflict;
	  break;
	case DELETE_Ambiguous_Specification:
	  /* XXX Need better error value.  Fall through.  */
	default:
	  return GPGME_General_Error;
	  break;
	}
      break;

    case GPGME_STATUS_DELETE_PROBLEM:
      ctx->result.delete->problem = atoi (args);
      break;

    default:
      break;
    }
  return 0;
}


static GpgmeError
_gpgme_op_delete_start (GpgmeCtx ctx, int synchronous,
			const GpgmeKey key, int allow_secret)
{
  GpgmeError err = 0;

  err = _gpgme_op_reset (ctx, synchronous);
  if (err)
    goto leave;

  _gpgme_engine_set_status_handler (ctx->engine, delete_status_handler, ctx);
  _gpgme_engine_set_verbosity (ctx->engine, ctx->verbosity);

  err = _gpgme_engine_op_delete (ctx->engine, key, allow_secret);

 leave:
  if (err)
    {
      ctx->pending = 0; 
      _gpgme_engine_release (ctx->engine);
      ctx->engine = NULL;
    }
  return err;
}


GpgmeError
gpgme_op_delete_start (GpgmeCtx ctx, const GpgmeKey key, int allow_secret)
{
  return _gpgme_op_delete_start (ctx, 0, key, allow_secret);
}


/**
 * gpgme_op_delete:
 * @c: Context 
 * @key: A Key Object
 * @allow_secret: Allow secret key delete
 * 
 * Delete the give @key from the key database.  To delete a secret
 * along with the public key, @allow_secret must be true.
 * 
 * Return value: 0 on success or an error code.
 **/
GpgmeError
gpgme_op_delete (GpgmeCtx ctx, const GpgmeKey key, int allow_secret)
{
  GpgmeError err = _gpgme_op_delete_start (ctx, 1, key, allow_secret);
  if (!err)
    err = _gpgme_wait_one (ctx);
  return err;
}