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-rw-r--r--src/ClientSubscribe.cxx95
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diff --git a/src/ClientSubscribe.cxx b/src/ClientSubscribe.cxx
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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->messages.size() >= CLIENT_MAX_MESSAGES ||
+ !client->IsSubscribed(msg.GetChannel()))
+ return false;
+
+ if (client->messages.empty())
+ client_idle_add(client, IDLE_MESSAGE);
+
+ client->messages.push_back(msg);
+ return true;
+}