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/*
* Copyright 2003-2017 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_DETACHED_SONG_HXX
#define MPD_DETACHED_SONG_HXX
#include "check.h"
#include "tag/Tag.hxx"
#include "Chrono.hxx"
#include "util/Compiler.h"
#include <chrono>
#include <string>
#include <utility>
struct LightSong;
class Storage;
class Path;
class DetachedSong {
friend DetachedSong DatabaseDetachSong(const Storage &db,
const LightSong &song);
/**
* An UTF-8-encoded URI referring to the song file. This can
* be one of:
*
* - an absolute URL with a scheme
* (e.g. "http://example.com/foo.mp3")
*
* - an absolute file name
*
* - a file name relative to the music directory
*/
std::string uri;
/**
* The "real" URI, the one to be used for opening the
* resource. If this attribute is empty, then #uri shall be
* used.
*
* This attribute is used for songs from the database which
* have a relative URI.
*/
std::string real_uri;
Tag tag;
/**
* The time stamp of the last file modification. A negative
* value means that this is unknown/unavailable.
*/
std::chrono::system_clock::time_point mtime =
std::chrono::system_clock::time_point::min();
/**
* Start of this sub-song within the file.
*/
SongTime start_time = SongTime::zero();
/**
* End of this sub-song within the file.
* Unused if zero.
*/
SongTime end_time = SongTime::zero();
public:
explicit DetachedSong(const char *_uri)
:uri(_uri) {}
explicit DetachedSong(const std::string &_uri)
:uri(_uri) {}
explicit DetachedSong(std::string &&_uri)
:uri(std::move(_uri)) {}
template<typename U>
DetachedSong(U &&_uri, Tag &&_tag)
:uri(std::forward<U>(_uri)),
tag(std::move(_tag)) {}
/**
* Copy data from a #LightSong instance. Usually, you should
* call DatabaseDetachSong() instead, which initializes
* #real_uri properly using Storage::MapUTF8().
*/
explicit DetachedSong(const LightSong &other);
gcc_noinline
~DetachedSong() = default;
/* these are declared because the user-defined destructor
above prevents them from being generated implicitly */
explicit DetachedSong(const DetachedSong &) = default;
DetachedSong(DetachedSong &&) = default;
DetachedSong &operator=(DetachedSong &&) = default;
gcc_pure
explicit operator LightSong() const noexcept;
gcc_pure
const char *GetURI() const noexcept {
return uri.c_str();
}
template<typename T>
void SetURI(T &&_uri) {
uri = std::forward<T>(_uri);
}
/**
* Does this object have a "real" URI different from the
* displayed URI?
*/
gcc_pure
bool HasRealURI() const noexcept {
return !real_uri.empty();
}
/**
* Returns "real" URI (#real_uri) and falls back to just
* GetURI().
*/
gcc_pure
const char *GetRealURI() const noexcept {
return (HasRealURI() ? real_uri : uri).c_str();
}
template<typename T>
void SetRealURI(T &&_uri) {
real_uri = std::forward<T>(_uri);
}
/**
* Returns true if both objects refer to the same physical
* song.
*/
gcc_pure
bool IsSame(const DetachedSong &other) const noexcept {
return uri == other.uri &&
start_time == other.start_time &&
end_time == other.end_time;
}
gcc_pure gcc_nonnull_all
bool IsURI(const char *other_uri) const noexcept {
return uri == other_uri;
}
gcc_pure
bool IsRemote() const noexcept;
gcc_pure
bool IsFile() const noexcept {
return !IsRemote();
}
gcc_pure
bool IsAbsoluteFile() const noexcept;
gcc_pure
bool IsInDatabase() const noexcept;
const Tag &GetTag() const noexcept {
return tag;
}
Tag &WritableTag() noexcept {
return tag;
}
void SetTag(const Tag &_tag) {
tag = Tag(_tag);
}
void SetTag(Tag &&_tag) {
tag = std::move(_tag);
}
void MoveTagFrom(DetachedSong &&other) {
tag = std::move(other.tag);
}
/**
* Similar to the MoveTagFrom(), but move only the #TagItem
* array.
*/
void MoveTagItemsFrom(DetachedSong &&other) {
tag.MoveItemsFrom(std::move(other.tag));
}
std::chrono::system_clock::time_point GetLastModified() const {
return mtime;
}
void SetLastModified(std::chrono::system_clock::time_point _value) {
mtime = _value;
}
SongTime GetStartTime() const {
return start_time;
}
void SetStartTime(SongTime _value) {
start_time = _value;
}
SongTime GetEndTime() const {
return end_time;
}
void SetEndTime(SongTime _value) {
end_time = _value;
}
gcc_pure
SignedSongTime GetDuration() const noexcept;
/**
* Update the #tag and #mtime.
*
* @return true on success
*/
bool Update() noexcept;
/**
* Load #tag and #mtime from a local file.
*/
bool LoadFile(Path path) noexcept;
};
#endif
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