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/*
* Copyright 2003-2018 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 "config.h"
#include "ClientInternal.hxx"
#include "Partition.hxx"
#include "Idle.hxx"
#include <assert.h>
Client::SubscribeResult
Client::Subscribe(const char *channel) noexcept
{
assert(channel != nullptr);
if (!client_message_valid_channel_name(channel))
return Client::SubscribeResult::INVALID;
if (num_subscriptions >= CLIENT_MAX_SUBSCRIPTIONS)
return Client::SubscribeResult::FULL;
auto r = subscriptions.insert(channel);
if (!r.second)
return Client::SubscribeResult::ALREADY;
++num_subscriptions;
partition->EmitIdle(IDLE_SUBSCRIPTION);
return Client::SubscribeResult::OK;
}
bool
Client::Unsubscribe(const char *channel) noexcept
{
const auto i = subscriptions.find(channel);
if (i == subscriptions.end())
return false;
assert(num_subscriptions > 0);
subscriptions.erase(i);
--num_subscriptions;
partition->EmitIdle(IDLE_SUBSCRIPTION);
assert((num_subscriptions == 0) ==
subscriptions.empty());
return true;
}
void
Client::UnsubscribeAll() noexcept
{
subscriptions.clear();
num_subscriptions = 0;
}
bool
Client::PushMessage(const ClientMessage &msg) noexcept
{
if (messages.size() >= CLIENT_MAX_MESSAGES ||
!IsSubscribed(msg.GetChannel()))
return false;
if (messages.empty())
IdleAdd(IDLE_MESSAGE);
messages.push_back(msg);
return true;
}
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