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/*
* Copyright 2003-2020 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 "MessageCommands.hxx"
#include "Request.hxx"
#include "client/Client.hxx"
#include "client/List.hxx"
#include "client/Response.hxx"
#include "util/ConstBuffer.hxx"
#include "Partition.hxx"
#include <cassert>
#include <set>
#include <string>
CommandResult
handle_subscribe(Client &client, Request args, Response &r)
{
assert(args.size == 1);
const char *const channel_name = args[0];
switch (client.Subscribe(channel_name)) {
case Client::SubscribeResult::OK:
return CommandResult::OK;
case Client::SubscribeResult::INVALID:
r.Error(ACK_ERROR_ARG, "invalid channel name");
return CommandResult::ERROR;
case Client::SubscribeResult::ALREADY:
r.Error(ACK_ERROR_EXIST, "already subscribed to this channel");
return CommandResult::ERROR;
case Client::SubscribeResult::FULL:
r.Error(ACK_ERROR_EXIST, "subscription list is full");
return CommandResult::ERROR;
}
/* unreachable */
assert(false);
gcc_unreachable();
}
CommandResult
handle_unsubscribe(Client &client, Request args, Response &r)
{
assert(args.size == 1);
const char *const channel_name = args[0];
if (client.Unsubscribe(channel_name))
return CommandResult::OK;
else {
r.Error(ACK_ERROR_NO_EXIST, "not subscribed to this channel");
return CommandResult::ERROR;
}
}
CommandResult
handle_channels(Client &client, [[maybe_unused]] Request args, Response &r)
{
assert(args.empty());
std::set<std::string> channels;
for (const auto &c : client.GetPartition().clients) {
const auto &subscriptions = c.GetSubscriptions();
channels.insert(subscriptions.begin(),
subscriptions.end());
}
for (const auto &channel : channels)
r.Format("channel: %s\n", channel.c_str());
return CommandResult::OK;
}
CommandResult
handle_read_messages(Client &client,
[[maybe_unused]] Request args, Response &r)
{
assert(args.empty());
client.ConsumeMessages([&r](const auto &msg){
r.Format("channel: %s\nmessage: %s\n",
msg.GetChannel(), msg.GetMessage());
});
return CommandResult::OK;
}
CommandResult
handle_send_message(Client &client, Request args, Response &r)
{
assert(args.size == 2);
const char *const channel_name = args[0];
const char *const message_text = args[1];
if (!client_message_valid_channel_name(channel_name)) {
r.Error(ACK_ERROR_ARG, "invalid channel name");
return CommandResult::ERROR;
}
bool sent = false;
const ClientMessage msg(channel_name, message_text);
for (auto &c : client.GetPartition().clients)
if (c.PushMessage(msg))
sent = true;
if (sent)
return CommandResult::OK;
else {
r.Error(ACK_ERROR_NO_EXIST,
"nobody is subscribed to this channel");
return CommandResult::ERROR;
}
}
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