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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.
*/
#ifndef MPD_CONFIG_DATA_HXX
#define MPD_CONFIG_DATA_HXX
#include "Option.hxx"
#include "Param.hxx"
#include "Block.hxx"
#include <array>
#include <chrono>
#include <forward_list>
class AllocatedPath;
struct ConfigData {
std::array<std::forward_list<ConfigParam>, std::size_t(ConfigOption::MAX)> params;
std::array<std::forward_list<ConfigBlock>, std::size_t(ConfigBlockOption::MAX)> blocks;
void Clear();
auto &GetParamList(ConfigOption option) noexcept {
return params[size_t(option)];
}
const auto &GetParamList(ConfigOption option) const noexcept {
return params[size_t(option)];
}
void AddParam(ConfigOption option, ConfigParam &¶m) noexcept;
gcc_pure
const ConfigParam *GetParam(ConfigOption option) const noexcept {
const auto &list = GetParamList(option);
return list.empty() ? nullptr : &list.front();
}
template<typename F>
auto With(ConfigOption option, F &&f) const {
const auto *param = GetParam(option);
return param != nullptr
? param->With(std::forward<F>(f))
: f(nullptr);
}
gcc_pure
const char *GetString(ConfigOption option,
const char *default_value=nullptr) const noexcept;
/**
* Returns an optional configuration variable which contains an
* absolute path. If there is a tilde prefix, it is expanded.
* Returns nullptr if the value is not present.
*
* Throws #std::runtime_error on error.
*/
AllocatedPath GetPath(ConfigOption option) const;
unsigned GetUnsigned(ConfigOption option,
unsigned default_value) const;
std::chrono::steady_clock::duration
GetUnsigned(ConfigOption option,
std::chrono::steady_clock::duration default_value) const {
// TODO: allow unit suffixes
auto u = GetUnsigned(option, default_value.count());
return std::chrono::steady_clock::duration(u);
}
unsigned GetPositive(ConfigOption option,
unsigned default_value) const;
std::chrono::steady_clock::duration
GetPositive(ConfigOption option,
std::chrono::steady_clock::duration default_value) const {
// TODO: allow unit suffixes
auto u = GetPositive(option, default_value.count());
return std::chrono::steady_clock::duration(u);
}
bool GetBool(ConfigOption option, bool default_value) const;
auto &GetBlockList(ConfigBlockOption option) noexcept {
return blocks[size_t(option)];
}
const auto &GetBlockList(ConfigBlockOption option) const noexcept {
return blocks[size_t(option)];
}
ConfigBlock &AddBlock(ConfigBlockOption option,
ConfigBlock &&block) noexcept;
gcc_pure
const ConfigBlock *GetBlock(ConfigBlockOption option) const noexcept {
const auto &list = GetBlockList(option);
return list.empty() ? nullptr : &list.front();
}
/**
* Find a block with a matching attribute.
*
* Throws if a block doesn't have the specified (mandatory) key.
*
* @param option the blocks to search
* @param key the attribute name
* @param value the expected attribute value
*/
gcc_pure
const ConfigBlock *FindBlock(ConfigBlockOption option,
const char *key, const char *value) const;
ConfigBlock &MakeBlock(ConfigBlockOption option,
const char *key, const char *value);
};
#endif
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