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if (dc_is_contact_in_chat(context, chat_id, contact_id))
{
if (!(flags&DC_FROM_HANDSHAKE)) {
success = 1;
goto cleanup;
}
// else continue and send status mail
}
else
{
if (chat->type==DC_CHAT_TYPE_VERIFIED_GROUP)
{
if (dc_contact_is_verified(contact)!=DC_BIDIRECT_VERIFIED) {
dc_log_error(context, 0, "Only bidirectional verified contacts can be added to verified groups.");
goto cleanup;
}
}
if (0==dc_add_to_chat_contacts_table(context, chat_id, contact_id)) {
goto cleanup;
}
}
/* send a status mail to all group members */
if (DO_SEND_STATUS_MAILS)
{
msg->type = DC_MSG_TEXT;
msg->text = dc_stock_system_msg(context, DC_STR_MSGADDMEMBER, contact->addr, NULL, DC_CONTACT_ID_SELF);
dc_param_set_int(msg->param, DC_PARAM_CMD, DC_CMD_MEMBER_ADDED_TO_GROUP);
dc_param_set (msg->param, DC_PARAM_CMD_ARG, contact->addr);
dc_param_set_int(msg->param, DC_PARAM_CMD_ARG2, flags); // combine the Secure-Join protocol headers with the Chat-Group-Member-Added header
msg->id = dc_send_msg(context, chat_id, msg);
context->cb(context, DC_EVENT_MSGS_CHANGED, chat_id, msg->id);
}
context->cb(context, DC_EVENT_CHAT_MODIFIED, chat_id, 0);
success = 1;
cleanup:
dc_chat_unref(chat);
dc_contact_unref(contact);
dc_msg_unref(msg);
free(self_addr);
return success;
}
/**
* Add a member to a group.
*
* If the group is already _promoted_ (any message was sent to the group),
* all group members are informed by a special status message that is sent automatically by this function.
*
* If the group is a verified group, only verified contacts can be added to the group.
*
* Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
*
* @memberof dc_context_t
* @param context The context as created by dc_context_new().
* @param chat_id The chat ID to add the contact to. Must be a group chat.
* @param contact_id The contact ID to add to the chat.
* @return 1=member added to group, 0=error
*/
int dc_add_contact_to_chat(dc_context_t* context, uint32_t chat_id, uint32_t contact_id /*may be DC_CONTACT_ID_SELF*/)
{
return dc_add_contact_to_chat_ex(context, chat_id, contact_id, 0);
}
/**
* Remove a member from a group.
*
* If the group is already _promoted_ (any message was sent to the group),
* all group members are informed by a special status message that is sent automatically by this function.
*
* Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
*
* @memberof dc_context_t
* @param context The context as created by dc_context_new().
* @param chat_id The chat ID to remove the contact from. Must be a group chat.
* @param contact_id The contact ID to remove from the chat.
* @return 1=member removed from group, 0=error
*/
int dc_remove_contact_from_chat(dc_context_t* context, uint32_t chat_id, uint32_t contact_id /*may be DC_CONTACT_ID_SELF*/)
{
int success = 0;
dc_contact_t* contact = dc_get_contact(context, contact_id);
dc_chat_t* chat = dc_chat_new(context);
dc_msg_t* msg = dc_msg_new_untyped(context);
char* q3 = NULL;
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC || chat_id<=DC_CHAT_ID_LAST_SPECIAL || (contact_id<=DC_CONTACT_ID_LAST_SPECIAL && contact_id!=DC_CONTACT_ID_SELF)) {
goto cleanup; /* we do not check if "contact_id" exists but just delete all records with the id from chats_contacts */
} /* this allows to delete pending references to deleted contacts. Of course, this should _not_ happen. */
if (0==real_group_exists(context, chat_id)
|| 0==dc_chat_load_from_db(chat, chat_id)) {
goto cleanup;
}