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-rw-r--r--src/client/ClientSubscribe.cxx87
1 files changed, 87 insertions, 0 deletions
diff --git a/src/client/ClientSubscribe.cxx b/src/client/ClientSubscribe.cxx
new file mode 100644
index 000000000..8ea2e363b
--- /dev/null
+++ b/src/client/ClientSubscribe.cxx
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2003-2014 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 "Idle.hxx"
+
+#include <assert.h>
+
+Client::SubscribeResult
+Client::Subscribe(const char *channel)
+{
+ 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;
+
+ idle_add(IDLE_SUBSCRIPTION);
+
+ return Client::SubscribeResult::OK;
+}
+
+bool
+Client::Unsubscribe(const char *channel)
+{
+ const auto i = subscriptions.find(channel);
+ if (i == subscriptions.end())
+ return false;
+
+ assert(num_subscriptions > 0);
+
+ subscriptions.erase(i);
+ --num_subscriptions;
+
+ idle_add(IDLE_SUBSCRIPTION);
+
+ assert((num_subscriptions == 0) ==
+ subscriptions.empty());
+
+ return true;
+}
+
+void
+Client::UnsubscribeAll()
+{
+ subscriptions.clear();
+ num_subscriptions = 0;
+}
+
+bool
+Client::PushMessage(const ClientMessage &msg)
+{
+ if (messages.size() >= CLIENT_MAX_MESSAGES ||
+ !IsSubscribed(msg.GetChannel()))
+ return false;
+
+ if (messages.empty())
+ IdleAdd(IDLE_MESSAGE);
+
+ messages.push_back(msg);
+ return true;
+}