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/*
* Copyright 2003-2021 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 "Song.hxx"
#include "ExportedSong.hxx"
#include "Directory.hxx"
#include "tag/Tag.hxx"
#include "tag/Builder.hxx"
#include "song/DetachedSong.hxx"
#include "song/LightSong.hxx"
#include "fs/Traits.hxx"
#include "time/ChronoUtil.hxx"
#include "util/IterableSplitString.hxx"
Song::Song(DetachedSong &&other, Directory &_parent) noexcept
:tag(std::move(other.WritableTag())),
parent(_parent),
mtime(other.GetLastModified()),
start_time(other.GetStartTime()),
end_time(other.GetEndTime()),
audio_format(other.GetAudioFormat()),
filename(other.GetURI())
{
}
const char *
Song::GetFilenameSuffix() const noexcept
{
return target.empty()
? PathTraitsUTF8::GetFilenameSuffix(filename.c_str())
: PathTraitsUTF8::GetPathSuffix(target.c_str());
}
std::string
Song::GetURI() const noexcept
{
if (parent.IsRoot())
return filename;
else {
const char *path = parent.GetPath();
return PathTraitsUTF8::Build(path, filename);
}
}
/**
* Path name traversal of a #Directory.
*/
gcc_pure
static const Directory *
FindTargetDirectory(const Directory &base, StringView path) noexcept
{
const auto *directory = &base;
for (const StringView name : IterableSplitString(path, '/')) {
if (name.empty() || name.Equals("."))
continue;
directory = name.Equals("..")
? directory->parent
: directory->FindChild(name);
if (directory == nullptr)
break;
}
return directory;
}
/**
* Path name traversal of a #Song.
*/
gcc_pure
static const Song *
FindTargetSong(const Directory &_directory, StringView target) noexcept
{
auto [path, last] = target.SplitLast('/');
if (last == nullptr) {
last = path;
path = nullptr;
}
if (last.empty())
return nullptr;
const auto *directory = FindTargetDirectory(_directory, path);
if (directory == nullptr)
return nullptr;
return directory->FindSong(last);
}
ExportedSong
Song::Export() const noexcept
{
const auto *target_song = !target.empty()
? FindTargetSong(parent, (std::string_view)target)
: nullptr;
Tag merged_tag;
if (target_song != nullptr) {
/* if we found the target song (which may be the
underlying song file of a CUE file), merge the tags
from that song with this song's tags (from the CUE
file) */
TagBuilder builder(tag);
builder.Complement(target_song->tag);
merged_tag = builder.Commit();
}
ExportedSong dest = merged_tag.IsDefined()
? ExportedSong(filename.c_str(), std::move(merged_tag))
: ExportedSong(filename.c_str(), tag);
if (!parent.IsRoot())
dest.directory = parent.GetPath();
if (!target.empty())
dest.real_uri = target.c_str();
dest.mtime = IsNegative(mtime) && target_song != nullptr
? target_song->mtime
: mtime;
dest.start_time = start_time.IsZero() && target_song != nullptr
? target_song->start_time
: start_time;
dest.end_time = end_time.IsZero() && target_song != nullptr
? target_song->end_time
: end_time;
dest.audio_format = audio_format.IsDefined() || target_song == nullptr
? audio_format
: target_song->audio_format;
return dest;
}
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