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/*
   This file is part of GNUnet.
   Copyright (C) 2021 GNUnet e.V.

   GNUnet 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 of the License,
   or (at your option) any later version.

   GNUnet 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 this program.  If not, see <http://www.gnu.org/licenses/>.

   SPDX-License-Identifier: AGPL3.0-or-later
 */
/*
 * @author Tobias Frisch
 * @file gnunet_chat_context_intern.c
 */

#include "gnunet_chat_invitation.h"
#include "gnunet_chat_message.h"

#define GNUNET_UNUSED __attribute__ ((unused))

int
it_destroy_context_timestamps (GNUNET_UNUSED void *cls,
			       GNUNET_UNUSED const struct GNUNET_ShortHashCode *key,
			       void *value)
{
  GNUNET_assert(value);

  struct GNUNET_TIME_Absolute *time = value;
  GNUNET_free(time);
  return GNUNET_YES;
}

int
it_destroy_context_messages (GNUNET_UNUSED void *cls,
			     GNUNET_UNUSED const struct GNUNET_HashCode *key,
			     void *value)
{
  GNUNET_assert(value);

  struct GNUNET_CHAT_Message *message = value;
  message_destroy(message);
  return GNUNET_YES;
}

int
it_destroy_context_invites (GNUNET_UNUSED void *cls,
			    GNUNET_UNUSED const struct GNUNET_HashCode *key,
			    void *value)
{
  GNUNET_assert(value);

  struct GNUNET_CHAT_Invitation *invitation = value;
  invitation_destroy(invitation);
  return GNUNET_YES;
}

void
cont_context_write_records (void *cls,
                            GNUNET_UNUSED int32_t success,
                            const char *emsg)
{
  struct GNUNET_CHAT_Context *context = cls;

  if (emsg)
    handle_send_internal_message(
	context->handle,
	context,
	GNUNET_CHAT_FLAG_WARNING,
	emsg
    );
}

void
error_context_write_records (void *cls)
{
  struct GNUNET_CHAT_Context *context = cls;

  handle_send_internal_message(
      context->handle,
      context,
      GNUNET_CHAT_FLAG_WARNING,
      _("Failed opening records!")
  );
}

void
monitor_context_write_records (void *cls,
			       const struct GNUNET_IDENTITY_PrivateKey *zone,
			       const char *label,
			       GNUNET_UNUSED unsigned int rd_count,
			       GNUNET_UNUSED const struct GNUNET_GNSRECORD_Data *rd)
{
  struct GNUNET_CHAT_Context *context = cls;

  const struct GNUNET_HashCode *hash = GNUNET_MESSENGER_room_get_key(
      context->room
  );

  struct GNUNET_MESSENGER_RoomEntryRecord room;
  GNUNET_CRYPTO_get_peer_identity(context->handle->cfg, &(room.door));

  GNUNET_memcpy(
      &(room.key),
      hash,
      sizeof(room.key)
  );

  struct GNUNET_TIME_Absolute expiration = GNUNET_TIME_absolute_get_forever_();

  const char *nick = context->nick;
  const char *topic = context->topic;

  if (topic)
  {
    struct GNUNET_HashCode topic_hash;
    GNUNET_CRYPTO_hash(topic, strlen(topic), &topic_hash);

    if (0 != GNUNET_CRYPTO_hash_cmp(&topic_hash, hash))
      topic = NULL;
  }

  unsigned int count = 1;

  struct GNUNET_GNSRECORD_Data data [3];
  data[0].record_type = GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY;
  data[0].data = &room;
  data[0].data_size = sizeof(room);
  data[0].expiration_time = expiration.abs_value_us;
  data[0].flags = GNUNET_GNSRECORD_RF_PRIVATE;

  if (nick)
  {
    data[count].record_type = GNUNET_GNSRECORD_TYPE_NICK;
    data[count].data = nick;
    data[count].data_size = strlen(nick);
    data[count].expiration_time = expiration.abs_value_us;
    data[count].flags = (
      GNUNET_GNSRECORD_RF_PRIVATE |
      GNUNET_GNSRECORD_RF_SUPPLEMENTAL
    );

    count++;
  }

  if (topic)
  {
    data[count].record_type = GNUNET_DNSPARSER_TYPE_TXT;
    data[count].data = topic;
    data[count].data_size = strlen(topic);
    data[count].expiration_time = expiration.abs_value_us;
    data[count].flags = (
      GNUNET_GNSRECORD_RF_PRIVATE |
      GNUNET_GNSRECORD_RF_SUPPLEMENTAL
    );

    count++;
  }

  GNUNET_NAMESTORE_records_commit(
      context->handle->namestore,
      zone,
      label,
      count,
      data,
      cont_context_write_records,
      context
  );
}