1 files changed, 301 insertions, 0 deletions

diff --git a/src/service/messenger/gnunet-service-messenger_member_store.c b/src/service/messenger/gnunet-service-messenger_member_store.c
new file mode 100644
index 000000000..e7876b382
--- /dev/null
+++ b/src/service/messenger/gnunet-service-messenger_member_store.c
@@ -0,0 +1,301 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2020--2023 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 src/messenger/gnunet-service-messenger_member_store.c
+ * @brief GNUnet MESSENGER service
+ */
+
+#include "platform.h"
+#include "gnunet-service-messenger_member_store.h"
+
+#include "gnunet-service-messenger_member.h"
+#include "gnunet-service-messenger_service.h"
+#include "gnunet-service-messenger_room.h"
+
+void
+init_member_store (struct GNUNET_MESSENGER_MemberStore *store,
+                   struct GNUNET_MESSENGER_SrvRoom *room)
+{
+  GNUNET_assert ((store) && (room));
+
+  store->room = room;
+  store->members = GNUNET_CONTAINER_multishortmap_create (8, GNUNET_NO);
+}
+
+
+static int
+iterate_destroy_members (void *cls,
+                         const struct GNUNET_ShortHashCode *key,
+                         void *value)
+{
+  struct GNUNET_MESSENGER_Member *member = value;
+  destroy_member (member);
+  return GNUNET_YES;
+}
+
+
+void
+clear_member_store (struct GNUNET_MESSENGER_MemberStore *store)
+{
+  GNUNET_assert ((store) && (store->members));
+
+  GNUNET_CONTAINER_multishortmap_iterate (store->members,
+                                          iterate_destroy_members, NULL);
+  GNUNET_CONTAINER_multishortmap_destroy (store->members);
+}
+
+
+struct GNUNET_MESSENGER_ContactStore*
+get_member_contact_store (struct GNUNET_MESSENGER_MemberStore *store)
+{
+  GNUNET_assert ((store) && (store->room));
+
+  struct GNUNET_MESSENGER_SrvRoom *room = store->room;
+
+  return get_service_contact_store (room->service);
+}
+
+
+const struct GNUNET_HashCode*
+get_member_store_key (const struct GNUNET_MESSENGER_MemberStore *store)
+{
+  GNUNET_assert (store);
+
+  return get_srv_room_key ((const struct
+                            GNUNET_MESSENGER_SrvRoom*) store->room);
+}
+
+
+static int
+callback_scan_for_members (void *cls,
+                           const char *filename)
+{
+  struct GNUNET_MESSENGER_MemberStore *store = cls;
+
+  if (GNUNET_YES == GNUNET_DISK_directory_test (filename, GNUNET_YES))
+  {
+    char *directory;
+
+    GNUNET_asprintf (&directory, "%s%c", filename, DIR_SEPARATOR);
+
+    load_member (store, directory);
+
+    GNUNET_free (directory);
+  }
+
+  return GNUNET_OK;
+}
+
+
+static int
+iterate_load_next_member_sessions (void *cls,
+                                   const struct GNUNET_ShortHashCode *id,
+                                   void *value)
+{
+  const char *sync_dir = cls;
+
+  struct GNUNET_MESSENGER_Member *member = value;
+
+  if (! member)
+    return GNUNET_YES;
+
+  char *member_dir;
+  GNUNET_asprintf (&member_dir, "%s%s%c", sync_dir, GNUNET_sh2s (id),
+                   DIR_SEPARATOR);
+
+  if (GNUNET_YES == GNUNET_DISK_directory_test (member_dir, GNUNET_YES))
+    load_member_next_sessions (member, member_dir);
+
+  GNUNET_free (member_dir);
+  return GNUNET_YES;
+}
+
+
+static int
+iterate_sync_member_contacts (void *cls,
+                              const struct GNUNET_ShortHashCode *id,
+                              void *value)
+{
+  struct GNUNET_MESSENGER_Member *member = value;
+
+  if (! member)
+    return GNUNET_YES;
+
+  sync_member_contacts (member);
+  return GNUNET_YES;
+}
+
+
+void
+load_member_store (struct GNUNET_MESSENGER_MemberStore *store,
+                   const char *directory)
+{
+  GNUNET_assert ((store) && (directory));
+
+  char *scan_dir;
+  GNUNET_asprintf (&scan_dir, "%s%s%c", directory, "members", DIR_SEPARATOR);
+
+  if (GNUNET_OK == GNUNET_DISK_directory_test (scan_dir, GNUNET_YES))
+    GNUNET_DISK_directory_scan (scan_dir, callback_scan_for_members, store);
+
+  GNUNET_CONTAINER_multishortmap_iterate (store->members,
+                                          iterate_load_next_member_sessions,
+                                          scan_dir);
+  GNUNET_CONTAINER_multishortmap_iterate (store->members,
+                                          iterate_sync_member_contacts, NULL);
+
+  GNUNET_free (scan_dir);
+}
+
+
+static int
+iterate_save_members (void *cls,
+                      const struct GNUNET_ShortHashCode *id,
+                      void *value)
+{
+  const char *save_dir = cls;
+
+  struct GNUNET_MESSENGER_Member *member = value;
+
+  if (! member)
+    return GNUNET_YES;
+
+  char *member_dir;
+  GNUNET_asprintf (&member_dir, "%s%s%c", save_dir, GNUNET_sh2s (id),
+                   DIR_SEPARATOR);
+
+  if ((GNUNET_YES == GNUNET_DISK_directory_test (member_dir, GNUNET_NO)) ||
+      (GNUNET_OK == GNUNET_DISK_directory_create (member_dir)))
+    save_member (member, member_dir);
+
+  GNUNET_free (member_dir);
+  return GNUNET_YES;
+}
+
+
+void
+save_member_store (struct GNUNET_MESSENGER_MemberStore *store,
+                   const char *directory)
+{
+  GNUNET_assert ((store) && (directory));
+
+  char *save_dir;
+  GNUNET_asprintf (&save_dir, "%s%s%c", directory, "members", DIR_SEPARATOR);
+
+  if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) ||
+      (GNUNET_OK == GNUNET_DISK_directory_create (save_dir)))
+    GNUNET_CONTAINER_multishortmap_iterate (store->members,
+                                            iterate_save_members, save_dir);
+
+  GNUNET_free (save_dir);
+}
+
+
+struct GNUNET_MESSENGER_Member*
+get_store_member (const struct GNUNET_MESSENGER_MemberStore *store,
+                  const struct GNUNET_ShortHashCode *id)
+{
+  GNUNET_assert ((store) && (store->members) && (id));
+
+  return GNUNET_CONTAINER_multishortmap_get (store->members, id);
+}
+
+
+struct GNUNET_MESSENGER_Member*
+get_store_member_of (struct GNUNET_MESSENGER_MemberStore *store,
+                     const struct GNUNET_MESSENGER_Message *message)
+{
+  GNUNET_assert ((store) && (message));
+
+  if (GNUNET_YES == is_peer_message (message))
+    return NULL;
+
+  if (GNUNET_MESSENGER_KIND_JOIN == message->header.kind)
+    return add_store_member (store, &(message->header.sender_id));
+  else
+    return get_store_member (store, &(message->header.sender_id));
+}
+
+
+struct GNUNET_MESSENGER_Member*
+add_store_member (struct GNUNET_MESSENGER_MemberStore *store,
+                  const struct GNUNET_ShortHashCode *id)
+{
+  GNUNET_assert ((store) && (store->members));
+
+  struct GNUNET_MESSENGER_Member *member = id? get_store_member (store, id) :
+                                           NULL;
+
+  if (member)
+    return member;
+
+  member = create_member (store, id);
+
+  if (! member)
+    return NULL;
+
+  if (GNUNET_OK != GNUNET_CONTAINER_multishortmap_put (store->members,
+                                                       get_member_id (member),
+                                                       member,
+                                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
+  {
+    destroy_member (member);
+    return NULL;
+  }
+
+  return member;
+}
+
+
+struct GNUNET_MESSENGER_ClosureIterateMembers
+{
+  GNUNET_MESSENGER_MemberIteratorCallback it;
+  void *cls;
+};
+
+static int
+iterate_store_members_it (void *cls,
+                          const struct GNUNET_ShortHashCode *key,
+                          void *value)
+{
+  struct GNUNET_MESSENGER_ClosureIterateMembers *iterate = cls;
+  struct GNUNET_MESSENGER_Member *member = value;
+
+  return iterate_member_sessions (member, iterate->it, iterate->cls);
+}
+
+
+int
+iterate_store_members (struct GNUNET_MESSENGER_MemberStore *store,
+                       GNUNET_MESSENGER_MemberIteratorCallback it,
+                       void *cls)
+{
+  GNUNET_assert ((store) && (store->members) && (it));
+
+  struct GNUNET_MESSENGER_ClosureIterateMembers iterate;
+
+  iterate.it = it;
+  iterate.cls = cls;
+
+  return GNUNET_CONTAINER_multishortmap_iterate (store->members,
+                                                 iterate_store_members_it,
+                                                 &iterate);
+}