switchboard.c

Linux下的多协议即时通讯程序源代码

/**
 * @file switchboard.c MSN switchboard functions
 *
 * purple
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "msn.h"
#include "prefs.h"
#include "switchboard.h"
#include "notification.h"
#include "msn-utils.h"

#include "error.h"

static MsnTable *cbs_table;

static void msg_error_helper(MsnCmdProc *cmdproc, MsnMessage *msg,
							 MsnMsgErrorType error);

/**************************************************************************
 * Main
 **************************************************************************/

MsnSwitchBoard *
msn_switchboard_new(MsnSession *session)
{
	MsnSwitchBoard *swboard;
	MsnServConn *servconn;

	g_return_val_if_fail(session != NULL, NULL);

	swboard = g_new0(MsnSwitchBoard, 1);

	swboard->session = session;
	swboard->servconn = servconn = msn_servconn_new(session, MSN_SERVCONN_SB);
	swboard->cmdproc = servconn->cmdproc;

	swboard->msg_queue = g_queue_new();
	swboard->empty = TRUE;

	swboard->cmdproc->data = swboard;
	swboard->cmdproc->cbs_table = cbs_table;

	session->switches = g_list_append(session->switches, swboard);

	return swboard;
}

void
msn_switchboard_destroy(MsnSwitchBoard *swboard)
{
	MsnSession *session;
	MsnMessage *msg;
	GList *l;

#ifdef MSN_DEBUG_SB
	purple_debug_info("msn", "switchboard_destroy: swboard(%p)\n", swboard);
#endif

	g_return_if_fail(swboard != NULL);

	if (swboard->destroying)
		return;

	swboard->destroying = TRUE;

	/* If it linked us is because its looking for trouble */
	while (swboard->slplinks != NULL)
		msn_slplink_destroy(swboard->slplinks->data);

	/* Destroy the message queue */
	while ((msg = g_queue_pop_head(swboard->msg_queue)) != NULL)
	{
		if (swboard->error != MSN_SB_ERROR_NONE)
		{
			/* The messages could not be sent due to a switchboard error */
			msg_error_helper(swboard->cmdproc, msg,
							 MSN_MSG_ERROR_SB);
		}
		msn_message_unref(msg);
	}

	g_queue_free(swboard->msg_queue);

	/* msg_error_helper will both remove the msg from ack_list and
	   unref it, so we don't need to do either here */
	while ((l = swboard->ack_list) != NULL)
		msg_error_helper(swboard->cmdproc, l->data, MSN_MSG_ERROR_SB);

	g_free(swboard->im_user);
	g_free(swboard->auth_key);
	g_free(swboard->session_id);

	for (l = swboard->users; l != NULL; l = l->next)
		g_free(l->data);

	session = swboard->session;
	session->switches = g_list_remove(session->switches, swboard);

#if 0
	/* This should never happen or we are in trouble. */
	if (swboard->servconn != NULL)
		msn_servconn_destroy(swboard->servconn);
#endif

	swboard->cmdproc->data = NULL;

	msn_servconn_set_disconnect_cb(swboard->servconn, NULL);

	msn_servconn_destroy(swboard->servconn);

	g_free(swboard);
}

void
msn_switchboard_set_auth_key(MsnSwitchBoard *swboard, const char *key)
{
	g_return_if_fail(swboard != NULL);
	g_return_if_fail(key != NULL);

	swboard->auth_key = g_strdup(key);
}

const char *
msn_switchboard_get_auth_key(MsnSwitchBoard *swboard)
{
	g_return_val_if_fail(swboard != NULL, NULL);

	return swboard->auth_key;
}

void
msn_switchboard_set_session_id(MsnSwitchBoard *swboard, const char *id)
{
	g_return_if_fail(swboard != NULL);
	g_return_if_fail(id != NULL);

	if (swboard->session_id != NULL)
		g_free(swboard->session_id);

	swboard->session_id = g_strdup(id);
}

const char *
msn_switchboard_get_session_id(MsnSwitchBoard *swboard)
{
	g_return_val_if_fail(swboard != NULL, NULL);

	return swboard->session_id;
}

void
msn_switchboard_set_invited(MsnSwitchBoard *swboard, gboolean invited)
{
	g_return_if_fail(swboard != NULL);

	swboard->invited = invited;
}

gboolean
msn_switchboard_is_invited(MsnSwitchBoard *swboard)
{
	g_return_val_if_fail(swboard != NULL, FALSE);

	return swboard->invited;
}

/**************************************************************************
 * Utility
 **************************************************************************/

static void
send_clientcaps(MsnSwitchBoard *swboard)
{
	MsnMessage *msg;

	msg = msn_message_new(MSN_MSG_CAPS);
	msn_message_set_content_type(msg, "text/x-clientcaps");
	msn_message_set_flag(msg, 'U');
	msn_message_set_bin_data(msg, MSN_CLIENTINFO, strlen(MSN_CLIENTINFO));

	msn_switchboard_send_msg(swboard, msg, TRUE);

	msn_message_destroy(msg);
}

static void
msn_switchboard_add_user(MsnSwitchBoard *swboard, const char *user)
{
	MsnCmdProc *cmdproc;
	PurpleAccount *account;

	g_return_if_fail(swboard != NULL);

	cmdproc = swboard->cmdproc;
	account = cmdproc->session->account;

	swboard->users = g_list_prepend(swboard->users, g_strdup(user));
	swboard->current_users++;
	swboard->empty = FALSE;

#ifdef MSN_DEBUG_CHAT
	purple_debug_info("msn", "user=[%s], total=%d\n", user,
					swboard->current_users);
#endif

	if (!(swboard->flag & MSN_SB_FLAG_IM) && (swboard->conv != NULL))
	{
		/* This is a helper switchboard. */
		purple_debug_error("msn", "switchboard_add_user: conv != NULL\n");
		return;
	}

	if ((swboard->conv != NULL) &&
		(purple_conversation_get_type(swboard->conv) == PURPLE_CONV_TYPE_CHAT))
	{
		purple_conv_chat_add_user(PURPLE_CONV_CHAT(swboard->conv), user, NULL,
								PURPLE_CBFLAGS_NONE, TRUE);
	}
	else if (swboard->current_users > 1 || swboard->total_users > 1)
	{
		if (swboard->conv == NULL ||
			purple_conversation_get_type(swboard->conv) != PURPLE_CONV_TYPE_CHAT)
		{
			GList *l;

#ifdef MSN_DEBUG_CHAT
			purple_debug_info("msn", "[chat] Switching to chat.\n");
#endif

#if 0
			/* this is bad - it causes msn_switchboard_close to be called on the
			 * switchboard we're in the middle of using :( */
			if (swboard->conv != NULL)
				purple_conversation_destroy(swboard->conv);
#endif

			swboard->chat_id = cmdproc->session->conv_seq++;
			swboard->flag |= MSN_SB_FLAG_IM;
			swboard->conv = serv_got_joined_chat(account->gc,
												 swboard->chat_id,
												 "MSN Chat");

			for (l = swboard->users; l != NULL; l = l->next)
			{
				const char *tmp_user;

				tmp_user = l->data;

#ifdef MSN_DEBUG_CHAT
				purple_debug_info("msn", "[chat] Adding [%s].\n", tmp_user);
#endif

				purple_conv_chat_add_user(PURPLE_CONV_CHAT(swboard->conv),
										tmp_user, NULL, PURPLE_CBFLAGS_NONE, TRUE);
			}

#ifdef MSN_DEBUG_CHAT
			purple_debug_info("msn", "[chat] We add ourselves.\n");
#endif

			purple_conv_chat_add_user(PURPLE_CONV_CHAT(swboard->conv),
									purple_account_get_username(account),
									NULL, PURPLE_CBFLAGS_NONE, TRUE);

			g_free(swboard->im_user);
			swboard->im_user = NULL;
		}
	}
	else if (swboard->conv == NULL)
	{
		swboard->conv = purple_find_conversation_with_account(PURPLE_CONV_TYPE_IM,
															user, account);
	}
	else
	{
		purple_debug_warning("msn", "switchboard_add_user: This should not happen!\n");
	}
}

static PurpleConversation *
msn_switchboard_get_conv(MsnSwitchBoard *swboard)
{
	PurpleAccount *account;

	g_return_val_if_fail(swboard != NULL, NULL);

	if (swboard->conv != NULL)
		return swboard->conv;

	purple_debug_error("msn", "Switchboard with unassigned conversation\n");

	account = swboard->session->account;

	return (swboard->conv = purple_conversation_new(PURPLE_CONV_TYPE_IM,
												  account, swboard->im_user));
}

static void
msn_switchboard_report_user(MsnSwitchBoard *swboard, PurpleMessageFlags flags, const char *msg)
{
	PurpleConversation *conv;

	g_return_if_fail(swboard != NULL);
	g_return_if_fail(msg != NULL);

	if ((conv = msn_switchboard_get_conv(swboard)) != NULL)
	{
		purple_conversation_write(conv, NULL, msg, flags, time(NULL));
	}
}

static void
swboard_error_helper(MsnSwitchBoard *swboard, int reason, const char *passport)
{
	g_return_if_fail(swboard != NULL);

	purple_debug_warning("msg", "Error: Unable to call the user %s for reason %i\n",
					   passport ? passport : "(null)", reason);

	/* TODO: if current_users > 0, this is probably a chat and an invite failed,
	 * we should report that in the chat or something */
	if (swboard->current_users == 0)
	{
		swboard->error = reason;
		msn_switchboard_close(swboard);
	}
}

static void
cal_error_helper(MsnTransaction *trans, int reason)
{
	MsnSwitchBoard *swboard;
	const char *passport;
	char **params;

	params = g_strsplit(trans->params, " ", 0);

	passport = params[0];

	swboard = trans->data;

	purple_debug_warning("msn", "cal_error_helper: command %s failed for reason %i\n",trans->command,reason);

	swboard_error_helper(swboard, reason, passport);

	g_strfreev(params);
}

static void
msg_error_helper(MsnCmdProc *cmdproc, MsnMessage *msg, MsnMsgErrorType error)
{
	MsnSwitchBoard *swboard;

	g_return_if_fail(cmdproc != NULL);
	g_return_if_fail(msg     != NULL);

	if ((error != MSN_MSG_ERROR_SB) && (msg->nak_cb != NULL))
		msg->nak_cb(msg, msg->ack_data);

	swboard = cmdproc->data;

	/* This is not good, and should be fixed somewhere else. */
	g_return_if_fail(swboard != NULL);

	if (msg->type == MSN_MSG_TEXT)
	{
		const char *format, *str_reason;
		char *body_str, *body_enc, *pre, *post;

#if 0
		if (swboard->conv == NULL)
		{
			if (msg->ack_ref)
				msn_message_unref(msg);

			return;
		}
#endif

		if (error == MSN_MSG_ERROR_TIMEOUT)
		{
			str_reason = _("Message may have not been sent "
						   "because a timeout occurred:");
		}
		else if (error == MSN_MSG_ERROR_SB)
		{
			switch (swboard->error)
			{
				case MSN_SB_ERROR_OFFLINE:
					str_reason = _("Message could not be sent, "
								   "not allowed while invisible:");
					break;
				case MSN_SB_ERROR_USER_OFFLINE:
					str_reason = _("Message could not be sent "
								   "because the user is offline:");
					break;
				case MSN_SB_ERROR_CONNECTION:
					str_reason = _("Message could not be sent "
								   "because a connection error occurred:");
					break;
				case MSN_SB_ERROR_TOO_FAST:
					str_reason = _("Message could not be sent "
								   "because we are sending too quickly:");
					break;
				case MSN_SB_ERROR_AUTHFAILED:
					str_reason = _("Message could not be sent "
								   "because we wer unable to establish a "
								   "session with the server. This is "
								   "likely a server problem, try again in "
								   "a few minutes:");
					break;
				default:
					str_reason = _("Message could not be sent "
								   "because an error with "
								   "the switchboard occurred:");
					break;
			}