gnunet-service-messenger_message_state.c

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/*
   This file is part of GNUnet.
   Copyright (C) 2020--2024 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
 */
#include "gnunet-service-messenger_message_state.h"
 
#include "gnunet_common.h"
#include "messenger_api_message.h"
 
void
init_message_state (struct GNUNET_MESSENGER_MessageState *state)
{
  GNUNET_assert (state);
 
  init_list_messages (&(state->last_messages));
}
 
 
void
clear_message_state (struct GNUNET_MESSENGER_MessageState *state)
{
  GNUNET_assert (state);
 
  clear_list_messages (&(state->last_messages));
}
 
 
void
get_message_state_chain_hash (const struct GNUNET_MESSENGER_MessageState *state,
                              struct GNUNET_HashCode *hash)
{
  GNUNET_assert ((state) && (hash));
 
  if (state->last_messages.head)
    GNUNET_memcpy (hash, &(state->last_messages.head->hash), sizeof(*hash));
  else
    memset (hash, 0, sizeof(*hash));
}
 
 
const struct GNUNET_HashCode*
get_message_state_merge_hash (const struct GNUNET_MESSENGER_MessageState *state)
{
  GNUNET_assert (state);
 
  if (state->last_messages.head == state->last_messages.tail)
    return NULL;
 
  return &(state->last_messages.tail->hash);
}
 
 
void
update_message_state (struct GNUNET_MESSENGER_MessageState *state,
                      enum GNUNET_GenericReturnValue requested,
                      const struct GNUNET_MESSENGER_Message *message,
                      const struct GNUNET_HashCode *hash)
{
  GNUNET_assert ((state) && (message) && (hash));
 
  if ((GNUNET_YES == requested) ||
      (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
      (GNUNET_MESSENGER_KIND_REQUEST == message->header.kind) ||
      (GNUNET_is_zero (hash)) ||
      (get_message_discourse (message)))
    return;
 
  if (GNUNET_MESSENGER_KIND_MERGE == message->header.kind)
    remove_from_list_messages (&(state->last_messages),
                               &(message->body.merge.previous));
  remove_from_list_messages (&(state->last_messages),
                             &(message->header.previous));
 
  add_to_list_messages (&(state->last_messages), hash);
}
 
 
void
load_message_state (struct GNUNET_MESSENGER_MessageState *state,
                    const char *path)
{
  char *last_messages_file;
 
  GNUNET_assert ((state) && (path));
 
  GNUNET_asprintf (&last_messages_file, "%s%s", path, "last_messages.list");
 
  load_list_messages (&(state->last_messages), last_messages_file);
  GNUNET_free (last_messages_file);
}
 
 
void
save_message_state (const struct GNUNET_MESSENGER_MessageState *state,
                    const char *path)
{
  char *last_messages_file;
 
  GNUNET_assert ((state) && (path));
 
  GNUNET_asprintf (&last_messages_file, "%s%s", path, "last_messages.list");
 
  save_list_messages (&(state->last_messages), last_messages_file);
  GNUNET_free (last_messages_file);
}