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/* group.h
*
* Slightly better groupchats implementation.
*
* Copyright (C) 2014 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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 3 of the License, or
* (at your option) any later version.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef GROUP_H
#define GROUP_H
#include "Messenger.h"
enum {
GROUPCHAT_STATUS_NONE,
GROUPCHAT_STATUS_VALID,
GROUPCHAT_STATUS_CONNECTED
};
typedef struct {
uint8_t real_pk[crypto_box_PUBLICKEYBYTES];
uint8_t temp_pk[crypto_box_PUBLICKEYBYTES];
uint64_t last_recv;
uint32_t last_message_number;
uint8_t nick[MAX_NAME_LENGTH];
uint8_t nick_len;
uint16_t peer_number;
} Group_Peer;
#define DESIRED_CLOSE_CONNECTIONS 4
#define MAX_GROUP_CONNECTIONS 16
#define GROUP_IDENTIFIER_LENGTH crypto_box_KEYBYTES /* So we can use new_symmetric_key(...) to fill it */
enum {
GROUPCHAT_CLOSE_NONE,
GROUPCHAT_CLOSE_CONNECTION,
GROUPCHAT_CLOSE_ONLINE
};
typedef struct {
uint8_t status;
Group_Peer *group;
uint32_t numpeers;
struct {
uint8_t type; /* GROUPCHAT_CLOSE_* */
uint8_t closest;
uint32_t number;
uint16_t group_number;
} close[MAX_GROUP_CONNECTIONS];
uint8_t real_pk[crypto_box_PUBLICKEYBYTES];
struct {
uint8_t entry;
uint8_t real_pk[crypto_box_PUBLICKEYBYTES];
uint8_t temp_pk[crypto_box_PUBLICKEYBYTES];
} closest_peers[DESIRED_CLOSE_CONNECTIONS];
uint8_t changed;
uint8_t identifier[GROUP_IDENTIFIER_LENGTH];
uint32_t message_number;
uint16_t peer_number;
uint64_t last_sent_ping;
int number_joined; /* friendcon_id of person that invited us to the chat. (-1 means none) */
} Group_c;
typedef struct {
Messenger *m;
Friend_Connections *fr_c;
Group_c *chats;
uint32_t num_chats;
void (*invite_callback)(Messenger *m, int32_t, const uint8_t *, uint16_t, void *);
void *invite_callback_userdata;
void (*message_callback)(Messenger *m, int, int, const uint8_t *, uint16_t, void *);
void *message_callback_userdata;
void (*peer_namelistchange)(Messenger *m, int, int, uint8_t, void *);
void *group_namelistchange_userdata;
} Group_Chats;
/* Set the callback for group invites.
*
* Function(Group_Chats *g_c, int32_t friendnumber, uint8_t *data, uint16_t length, void *userdata)
*
* data of length is what needs to be passed to join_groupchat().
*/
void g_callback_group_invite(Group_Chats *g_c, void (*function)(Messenger *m, int32_t, const uint8_t *, uint16_t,
void *), void *userdata);
/* Set the callback for group messages.
*
* Function(Group_Chats *g_c, int groupnumber, int friendgroupnumber, uint8_t * message, uint16_t length, void *userdata)
*/
void g_callback_group_message(Group_Chats *g_c, void (*function)(Messenger *m, int, int, const uint8_t *, uint16_t,
void *), void *userdata);
/* Set the callback for group actions.
*
* Function(Group_Chats *g_c, int groupnumber, int friendgroupnumber, uint8_t * message, uint16_t length, void *userdata)
*/
void g_callback_group_action(Group_Chats *g_c, void (*function)(Messenger *m, int, int, const uint8_t *, uint16_t,
void *), void *userdata);
/* Set callback function for peer name list changes.
*
* It gets called every time the name list changes(new peer/name, deleted peer)
* Function(Group_Chats *g_c, int groupnumber, int peernumber, TOX_CHAT_CHANGE change, void *userdata)
*/
enum {
CHAT_CHANGE_PEER_ADD,
CHAT_CHANGE_PEER_DEL,
CHAT_CHANGE_PEER_NAME,
};
void g_callback_group_namelistchange(Group_Chats *g_c, void (*function)(Messenger *m, int, int, uint8_t, void *),
void *userdata);
/* Creates a new groupchat and puts it in the chats array.
*
* return group number on success.
* return -1 on failure.
*/
int add_groupchat(Group_Chats *g_c);
/* Delete a groupchat from the chats array.
*
* return 0 on success.
* return -1 if failure.
*/
int del_groupchat(Group_Chats *g_c, int groupnumber);
/* Copy the name of peernumber who is in groupnumber to name.
* name must be at least MAX_NAME_LENGTH long.
*
* return length of name if success
* return -1 if failure
*/
int group_peername(const Group_Chats *g_c, int groupnumber, int peernumber, uint8_t *name);
/* invite friendnumber to groupnumber
* return 0 on success
* return -1 on failure
*/
int invite_friend(Group_Chats *g_c, int32_t friendnumber, int groupnumber);
/* Join a group (you need to have been invited first.)
*
* returns group number on success
* returns -1 on failure.
*/
int join_groupchat(Group_Chats *g_c, int32_t friendnumber, const uint8_t *data, uint16_t length);
/* send a group message
* return 0 on success
* return -1 on failure
*/
int group_message_send(const Group_Chats *g_c, int groupnumber, const uint8_t *message, uint16_t length);
/* send a group action
* return 0 on success
* return -1 on failure
*/
int group_action_send(const Group_Chats *g_c, int groupnumber, const uint8_t *action, uint16_t length);
/* Return the number of peers in the group chat on success.
* return -1 on failure
*/
int group_number_peers(const Group_Chats *g_c, int groupnumber);
/* return 1 if the peernumber corresponds to ours.
* return 0 on failure.
*/
unsigned int group_peernumber_is_ours(const Group_Chats *g_c, int groupnumber, int peernumber);
/* List all the peers in the group chat.
*
* Copies the names of the peers to the name[length][MAX_NAME_LENGTH] array.
*
* Copies the lengths of the names to lengths[length]
*
* returns the number of peers on success.
*
* return -1 on failure.
*/
int group_names(const Group_Chats *g_c, int groupnumber, uint8_t names[][MAX_NAME_LENGTH], uint16_t lengths[],
uint16_t length);
/* Return the number of chats in the instance m.
* You should use this to determine how much memory to allocate
* for copy_chatlist.
*/
uint32_t count_chatlist(Group_Chats *g_c);
/* Copy a list of valid chat IDs into the array out_list.
* If out_list is NULL, returns 0.
* Otherwise, returns the number of elements copied.
* If the array was too small, the contents
* of out_list will be truncated to list_size. */
uint32_t copy_chatlist(Group_Chats *g_c, int32_t *out_list, uint32_t list_size);
/* Send current name (set in messenger) to all online groups.
*/
void send_name_all_groups(Group_Chats *g_c);
/* Create new groupchat instance. */
Group_Chats *new_groupchats(Messenger *m);
/* main groupchats loop. */
void do_groupchats(Group_Chats *g_c);
/* Free everything related with group chats. */
void kill_groupchats(Group_Chats *g_c);
#endif
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