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/*
* Copyright (C) 2003-2011 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 "client_subscribe.h"
#include "client_internal.h"
#include "client_idle.h"
#include "idle.h"
#include <string.h>
G_GNUC_PURE
static GSList *
client_find_subscription(const struct client *client, const char *channel)
{
for (GSList *i = client->subscriptions; i != NULL; i = g_slist_next(i))
if (strcmp((const char *)i->data, channel) == 0)
return i;
return NULL;
}
enum client_subscribe_result
client_subscribe(struct client *client, const char *channel)
{
assert(client != NULL);
assert(channel != NULL);
if (!client_message_valid_channel_name(channel))
return CLIENT_SUBSCRIBE_INVALID;
if (client_find_subscription(client, channel) != NULL)
return CLIENT_SUBSCRIBE_ALREADY;
if (client->num_subscriptions >= CLIENT_MAX_SUBSCRIPTIONS)
return CLIENT_SUBSCRIBE_FULL;
client->subscriptions = g_slist_prepend(client->subscriptions,
g_strdup(channel));
++client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
return CLIENT_SUBSCRIBE_OK;
}
bool
client_unsubscribe(struct client *client, const char *channel)
{
GSList *i = client_find_subscription(client, channel);
if (i == NULL)
return false;
assert(client->num_subscriptions > 0);
client->subscriptions = g_slist_remove(client->subscriptions, i->data);
--client->num_subscriptions;
idle_add(IDLE_SUBSCRIPTION);
assert((client->num_subscriptions == 0) ==
(client->subscriptions == NULL));
return true;
}
void
client_unsubscribe_all(struct client *client)
{
for (GSList *i = client->subscriptions; i != NULL; i = g_slist_next(i))
g_free(i->data);
g_slist_free(client->subscriptions);
client->subscriptions = NULL;
client->num_subscriptions = 0;
}
bool
client_push_message(struct client *client, const struct client_message *msg)
{
assert(client != NULL);
assert(msg != NULL);
assert(client_message_defined(msg));
if (client->num_messages >= CLIENT_MAX_MESSAGES ||
client_find_subscription(client, msg->channel) == NULL)
return false;
if (client->messages == NULL)
client_idle_add(client, IDLE_MESSAGE);
client->messages = g_slist_prepend(client->messages,
client_message_dup(msg));
++client->num_messages;
return true;
}
GSList *
client_read_messages(struct client *client)
{
GSList *messages = g_slist_reverse(client->messages);
client->messages = NULL;
client->num_messages = 0;
return messages;
}
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