/* edit.c - Key edit function.

   Copyright (C) 2002, 2003, 2004 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 Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this program; 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 "gpgme.h"

#include "debug.h"

#include "context.h"

#include "ops.h"

#include "util.h"

typedef struct

{

  /* The user callback function and its hook value.  */

  gpgme_interact_cb_t fnc;

  gpgme_edit_cb_t fnc_old;

  void *fnc_value;

} *op_data_t;

static gpgme_error_t

edit_status_handler (void *priv, gpgme_status_code_t status, char *args)

{

  gpgme_ctx_t ctx = (gpgme_ctx_t) priv;

  gpgme_error_t err;

  void *hook;

  op_data_t opd;

  err = _gpgme_passphrase_status_handler (priv, status, args);

  if (err)

    return err;

  err = _gpgme_progress_status_handler (priv, status, args);

  if (err)

    return err;

  err = _gpgme_op_data_lookup (ctx, OPDATA_EDIT, &hook, -1, NULL);

  opd = hook;

  if (err)

    return err;

  if (opd->fnc_old)

    return (*opd->fnc_old) (opd->fnc_value, status, args, -1);

  return (*opd->fnc) (opd->fnc_value, _gpgme_status_to_string (status),

                      args, -1);

}

static gpgme_error_t

command_handler (void *priv, gpgme_status_code_t status, const char *args,

		 int fd, int *processed_r)

{

  gpgme_ctx_t ctx = (gpgme_ctx_t) priv;

  gpgme_error_t err;

  int processed = 0;

  if (ctx->passphrase_cb)

    {

      err = _gpgme_passphrase_command_handler (ctx, status, args,

					       fd, &processed);

      if (err)

	return err;

    }

  else

    err = 0;

  if (!processed)

    {

      void *hook;

      op_data_t opd;

      err = _gpgme_op_data_lookup (ctx, OPDATA_EDIT, &hook, -1, NULL);

      opd = hook;

      if (err)

	return err;

      if (opd->fnc_old)

        err = (*opd->fnc_old) (opd->fnc_value, status, args, fd);

      else

        err = (*opd->fnc) (opd->fnc_value, _gpgme_status_to_string (status),

                           args, fd);

      if (gpg_err_code (err) == GPG_ERR_FALSE)

        err = 0;

      else

        processed = 1;

    }

  *processed_r = processed;

  return err;

}

static gpgme_error_t

interact_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t key,

                unsigned int flags,

                gpgme_interact_cb_t fnc, void *fnc_value, gpgme_data_t out)

{

  gpgme_error_t err;

  void *hook;

  op_data_t opd;

  err = _gpgme_op_reset (ctx, synchronous);

  if (err)

    return err;

  if (!fnc || !out)

    return gpg_error (GPG_ERR_INV_VALUE);

  err = _gpgme_op_data_lookup (ctx, OPDATA_EDIT, &hook, sizeof (*opd), NULL);

  opd = hook;

  if (err)

    return err;

  opd->fnc = fnc;

  opd->fnc_old = NULL;

  opd->fnc_value = fnc_value;

  err = _gpgme_engine_set_command_handler (ctx->engine, command_handler,

					   ctx, out);

  if (err)

    return err;

  _gpgme_engine_set_status_handler (ctx->engine, edit_status_handler, ctx);

  return _gpgme_engine_op_edit (ctx->engine,

                                (flags & GPGME_INTERACT_CARD)? 1: 0,

                                key, out, ctx);

}

gpgme_error_t

gpgme_op_interact_start (gpgme_ctx_t ctx, gpgme_key_t key, unsigned int flags,

                         gpgme_interact_cb_t fnc, void *fnc_value,

                         gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_interact_start", ctx,

	      "key=%p flags=0x%x fnc=%p fnc_value=%p, out=%p",

	      key, flags,fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = interact_start (ctx, 0, key, flags, fnc, fnc_value, out);

  return err;

}

gpgme_error_t

gpgme_op_interact (gpgme_ctx_t ctx, gpgme_key_t key, unsigned int flags,

                   gpgme_interact_cb_t fnc, void *fnc_value,

                   gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_interact", ctx,

	      "key=%p flags=0x%x fnc=%p fnc_value=%p, out=%p",

	      key, flags,fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = interact_start (ctx, 1, key, flags, fnc, fnc_value, out);

  if (!err)

    err = _gpgme_wait_one (ctx);

  return err;

}

/* The deprecated interface.  */

static gpgme_error_t

edit_start (gpgme_ctx_t ctx, int synchronous, int type, gpgme_key_t key,

	    gpgme_edit_cb_t fnc, void *fnc_value, gpgme_data_t out)

{

  gpgme_error_t err;

  void *hook;

  op_data_t opd;

  err = _gpgme_op_reset (ctx, synchronous);

  if (err)

    return err;

  if (!fnc || !out)

    return gpg_error (GPG_ERR_INV_VALUE);

  err = _gpgme_op_data_lookup (ctx, OPDATA_EDIT, &hook, sizeof (*opd), NULL);

  opd = hook;

  if (err)

    return err;

  opd->fnc = NULL;

  opd->fnc_old = fnc;

  opd->fnc_value = fnc_value;

  err = _gpgme_engine_set_command_handler (ctx->engine, command_handler,

					   ctx, out);

  if (err)

    return err;

  _gpgme_engine_set_status_handler (ctx->engine, edit_status_handler, ctx);

  return _gpgme_engine_op_edit (ctx->engine, type, key, out, ctx);

}

gpgme_error_t

gpgme_op_edit_start (gpgme_ctx_t ctx, gpgme_key_t key,

		     gpgme_edit_cb_t fnc, void *fnc_value, gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_edit_start", ctx,

	      "key=%p (%s), fnc=%p fnc_value=%p, out=%p", key,

	      (key && key->subkeys && key->subkeys->fpr) ?

	      key->subkeys->fpr : "invalid", fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = edit_start (ctx, 0, 0, key, fnc, fnc_value, out);

  return err;

}

/* Edit the key KEY.  Send status and command requests to FNC and

   output of edit commands to OUT.  */

gpgme_error_t

gpgme_op_edit (gpgme_ctx_t ctx, gpgme_key_t key,

	       gpgme_edit_cb_t fnc, void *fnc_value, gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_edit", ctx,

	      "key=%p (%s), fnc=%p fnc_value=%p, out=%p", key,

	      (key && key->subkeys && key->subkeys->fpr) ?

	      key->subkeys->fpr : "invalid", fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = edit_start (ctx, 1, 0, key, fnc, fnc_value, out);

  if (!err)

    err = _gpgme_wait_one (ctx);

  return TRACE_ERR (err);

}

gpgme_error_t

gpgme_op_card_edit_start (gpgme_ctx_t ctx, gpgme_key_t key,

			  gpgme_edit_cb_t fnc, void *fnc_value,

			  gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_card_edit_start", ctx,

	      "key=%p (%s), fnc=%p fnc_value=%p, out=%p", key,

	      (key && key->subkeys && key->subkeys->fpr) ?

	      key->subkeys->fpr : "invalid", fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = edit_start (ctx, 0, 1, key, fnc, fnc_value, out);

  return err;

}

/* Edit the card for the key KEY.  Send status and command requests to

   FNC and output of edit commands to OUT.  */

gpgme_error_t

gpgme_op_card_edit (gpgme_ctx_t ctx, gpgme_key_t key,

		    gpgme_edit_cb_t fnc, void *fnc_value, gpgme_data_t out)

{

  gpgme_error_t err;

  TRACE_BEG5 (DEBUG_CTX, "gpgme_op_card_edit", ctx,

	      "key=%p (%s), fnc=%p fnc_value=%p, out=%p", key,

	      (key && key->subkeys && key->subkeys->fpr) ?

	      key->subkeys->fpr : "invalid", fnc, fnc_value, out);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = edit_start (ctx, 1, 1, key, fnc, fnc_value, out);

  if (!err)

    err = _gpgme_wait_one (ctx);

  return TRACE_ERR (err);

}