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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ClientSubscribe.hxx"
#include "ClientIdle.hxx"
#include "ClientInternal.hxx"
extern "C" {
#include "idle.h"
}
#include <assert.h>
#include <string.h>
enum client_subscribe_result
client_subscribe(Client *client, const char *channel)
{
assert(client != NULL);
assert(channel != NULL);
if (!client_message_valid_channel_name(channel))
return CLIENT_SUBSCRIBE_INVALID;
if (client->num_subscriptions >= CLIENT_MAX_SUBSCRIPTIONS)
return CLIENT_SUBSCRIBE_FULL;
auto r = client->subscriptions.insert(channel);
if (!r.second)
return CLIENT_SUBSCRIBE_ALREADY;
++client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
return CLIENT_SUBSCRIBE_OK;
}
bool
client_unsubscribe(Client *client, const char *channel)
{
const auto i = client->subscriptions.find(channel);
if (i == client->subscriptions.end())
return false;
assert(client->num_subscriptions > 0);
client->subscriptions.erase(i);
--client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
assert((client->num_subscriptions == 0) ==
client->subscriptions.empty());
return true;
}
void
client_unsubscribe_all(Client *client)
{
client->subscriptions.clear();
client->num_subscriptions = 0;
}
bool
client_push_message(Client *client, const ClientMessage &msg)
{
assert(client != NULL);
if (client->num_messages >= CLIENT_MAX_MESSAGES ||
!client->IsSubscribed(msg.GetChannel()))
return false;
if (client->messages == NULL)
client_idle_add(client, IDLE_MESSAGE);
client->messages = g_slist_prepend(client->messages,
new ClientMessage(msg));
++client->num_messages;
return true;
}
GSList *
client_read_messages(Client *client)
{
GSList *messages = g_slist_reverse(client->messages);
client->messages = NULL;
client->num_messages = 0;
return messages;
}
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