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/* Messenger.h
*
* An implementation of a simple text chat only messenger on the tox network core.
*
* NOTE: All the text in the messages must be encoded using UTF-8
Copyright (C) 2013 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 MESSENGER_H
#define MESSENGER_H
#include "net_crypto.h"
#include "DHT.h"
#include "friend_requests.h"
#define MAX_NAME_LENGTH 128
#define MAX_USERSTATUS_LENGTH 128
#define PACKET_ID_NICKNAME 48
#define PACKET_ID_USERSTATUS 49
#define PACKET_ID_MESSAGE 64
/* don't assume MAX_USERSTATUS_LENGTH will stay at 128, it may be increased
to an absurdly large number later */
/* add a friend
set the data that will be sent along with friend request
client_id is the client id of the friend
data is the data and length is the length
returns the friend number if success
return -1 if failure. */
int m_addfriend(uint8_t * client_id, uint8_t * data, uint16_t length);
/* add a friend without sending a friendrequest.
returns the friend number if success
return -1 if failure. */
int m_addfriend_norequest(uint8_t * client_id);
/* return the friend id associated to that client id.
return -1 if no such friend */
int getfriend_id(uint8_t * client_id);
/* copies the public key associated to that friend id into client_id buffer.
make sure that client_id is of size CLIENT_ID_SIZE.
return 0 if success
return -1 if failure */
int getclient_id(int friend_id, uint8_t * client_id);
/* remove a friend */
int m_delfriend(int friendnumber);
/* return 4 if friend is online
return 3 if friend is confirmed
return 2 if the friend request was sent
return 1 if the friend was added
return 0 if there is no friend with that number */
int m_friendstatus(int friendnumber);
/* send a text chat message to an online friend
returns 1 if packet was successfully put into the send queue
return 0 if it was not */
int m_sendmessage(int friendnumber, uint8_t * message, uint32_t length);
/* Set our nickname
name must be a string of maximum MAX_NAME_LENGTH length.
return 0 if success
return -1 if failure */
int setname(uint8_t * name, uint16_t length);
/* get name of friendnumber
put it in name
name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH (128) bytes.
return 0 if success
return -1 if failure */
int getname(int friendnumber, uint8_t * name);
/* set our user status
you are responsible for freeing status after
returns 0 on success, -1 on failure */
int m_set_userstatus(uint8_t *status, uint16_t length);
/* return the length of friendnumber's user status,
including null
pass it into malloc */
int m_get_userstatus_size(int friendnumber);
/* copy friendnumber's userstatus into buf, truncating if size is over maxlen
get the size you need to allocate from m_get_userstatus_size */
int m_copy_userstatus(int friendnumber, uint8_t * buf, uint32_t maxlen);
/* set the function that will be executed when a friend request is received.
function format is function(uint8_t * public_key, uint8_t * data, uint16_t length) */
void m_callback_friendrequest(void (*function)(uint8_t *, uint8_t *, uint16_t));
/* set the function that will be executed when a message from a friend is received.
function format is: function(int friendnumber, uint8_t * message, uint32_t length) */
void m_callback_friendmessage(void (*function)(int, uint8_t *, uint16_t));
/* set the callback for name changes
function(int friendnumber, uint8_t *newname, uint16_t length)
you are not responsible for freeing newname */
void m_callback_namechange(void (*function)(int, uint8_t *, uint16_t));
/* set the callback for user status changes
function(int friendnumber, uint8_t *newstatus, uint16_t length)
you are not responsible for freeing newstatus */
void m_callback_userstatus(void (*function)(int, uint8_t *, uint16_t));
/* run this at startup */
void initMessenger();
/* the main loop that needs to be run at least 200 times per second */
void doMessenger();
/* SAVING AND LOADING FUNCTIONS: */
/* returns the size of the messenger data (for saving) */
uint32_t Messenger_size();
/* save the messenger in data (must be allocated memory of size Messenger_size()) */
void Messenger_save(uint8_t * data);
/* load the messenger from data of size length */
int Messenger_load(uint8_t * data, uint32_t length);
#endif
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