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/*
* Copyright 2003-2016 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 "Glue.hxx"
#include "Registry.hxx"
#include "Explorer.hxx"
#include "NeighborPlugin.hxx"
#include "Info.hxx"
#include "config/ConfigGlobal.hxx"
#include "config/ConfigError.hxx"
#include "config/Block.hxx"
#include "util/Error.hxx"
#include "util/RuntimeError.hxx"
#include <stdexcept>
NeighborGlue::Explorer::~Explorer()
{
delete explorer;
}
NeighborGlue::~NeighborGlue() {}
static NeighborExplorer *
CreateNeighborExplorer(EventLoop &loop, NeighborListener &listener,
const ConfigBlock &block, Error &error)
{
const char *plugin_name = block.GetBlockValue("plugin");
if (plugin_name == nullptr) {
error.Set(config_domain,
"Missing \"plugin\" configuration");
return nullptr;
}
const NeighborPlugin *plugin = GetNeighborPluginByName(plugin_name);
if (plugin == nullptr) {
error.Format(config_domain, "No such neighbor plugin: %s",
plugin_name);
return nullptr;
}
return plugin->create(loop, listener, block, error);
}
bool
NeighborGlue::Init(EventLoop &loop, NeighborListener &listener, Error &error)
{
for (const auto *block = config_get_block(ConfigBlockOption::NEIGHBORS);
block != nullptr; block = block->next) {
try {
auto *explorer =
CreateNeighborExplorer(loop, listener, *block,
error);
if (explorer == nullptr) {
error.FormatPrefix("Line %i: ", block->line);
return false;
}
explorers.emplace_front(explorer);
} catch (...) {
std::throw_with_nested(FormatRuntimeError("Line %i: ",
block->line));
}
}
return true;
}
bool
NeighborGlue::Open(Error &error)
{
for (auto i = explorers.begin(), end = explorers.end();
i != end; ++i) {
if (!i->explorer->Open(error)) {
/* roll back */
for (auto k = explorers.begin(); k != i; ++k)
k->explorer->Close();
return false;
}
}
return true;
}
void
NeighborGlue::Close()
{
for (auto i = explorers.begin(), end = explorers.end(); i != end; ++i)
i->explorer->Close();
}
NeighborGlue::List
NeighborGlue::GetList() const
{
List result;
for (const auto &i : explorers)
result.splice_after(result.before_begin(),
i.explorer->GetList());
return result;
}
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