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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 "PlsPlaylistPlugin.hxx"
#include "../PlaylistPlugin.hxx"
#include "../MemorySongEnumerator.hxx"
#include "input/TextInputStream.hxx"
#include "input/InputStream.hxx"
#include "song/DetachedSong.hxx"
#include "tag/Builder.hxx"
#include "util/ASCII.hxx"
#include "util/StringStrip.hxx"
#include "util/DivideString.hxx"
#include <string>
#include <stdlib.h>
static bool
FindPlaylistSection(TextInputStream &is)
{
char *line;
while ((line = is.ReadLine()) != nullptr) {
line = Strip(line);
if (StringEqualsCaseASCII(line, "[playlist]"))
return true;
}
return false;
}
static bool
ParsePls(TextInputStream &is, std::forward_list<DetachedSong> &songs)
{
assert(songs.empty());
if (!FindPlaylistSection(is))
return false;
unsigned n_entries = 0;
struct Entry {
std::string file, title;
int length{-1};
Entry() = default;
};
static constexpr unsigned MAX_ENTRIES = 65536;
std::vector<Entry> entries;
char *line;
while ((line = is.ReadLine()) != nullptr) {
line = Strip(line);
if (*line == 0 || *line == ';')
continue;
if (*line == '[')
/* another section starts; we only want
[Playlist], so stop here */
break;
const DivideString ds(line, '=', true);
if (!ds.IsDefined())
continue;
const char *const name = ds.GetFirst();
const char *const value = ds.GetSecond();
if (StringEqualsCaseASCII(name, "NumberOfEntries")) {
n_entries = strtoul(value, nullptr, 10);
if (n_entries == 0)
/* empty file - nothing remains to be
done */
return true;
if (n_entries > MAX_ENTRIES)
n_entries = MAX_ENTRIES;
entries.resize(n_entries);
} else if (StringEqualsCaseASCII(name, "File", 4)) {
unsigned i = strtoul(name + 4, nullptr, 10);
if (i >= 1 && i <= (n_entries > 0 ? n_entries : MAX_ENTRIES)) {
if (entries.size() < i)
entries.resize(i);
entries[i - 1].file = value;
}
} else if (StringEqualsCaseASCII(name, "Title", 5)) {
unsigned i = strtoul(name + 5, nullptr, 10);
if (i >= 1 && i <= (n_entries > 0 ? n_entries : MAX_ENTRIES)) {
if (entries.size() < i)
entries.resize(i);
entries[i - 1].title = value;
}
} else if (StringEqualsCaseASCII(name, "Length", 6)) {
unsigned i = strtoul(name + 6, nullptr, 10);
if (i >= 1 && i <= (n_entries > 0 ? n_entries : MAX_ENTRIES)) {
if (entries.size() < i)
entries.resize(i);
entries[i - 1].length = atoi(value);
}
}
}
if (n_entries == 0)
/* no "NumberOfEntries" found */
return false;
auto i = songs.before_begin();
for (const auto &entry : entries) {
const char *uri = entry.file.c_str();
TagBuilder tag;
if (!entry.title.empty())
tag.AddItem(TAG_TITLE, entry.title.c_str());
if (entry.length > 0)
tag.SetDuration(SignedSongTime::FromS(entry.length));
i = songs.emplace_after(i, uri, tag.Commit());
}
return true;
}
static bool
ParsePls(InputStreamPtr &&is, std::forward_list<DetachedSong> &songs)
{
TextInputStream tis(std::move(is));
if (!ParsePls(tis, songs)) {
is = tis.StealInputStream();
return false;
}
return true;
}
static std::unique_ptr<SongEnumerator>
pls_open_stream(InputStreamPtr &&is)
{
std::forward_list<DetachedSong> songs;
if (!ParsePls(std::move(is), songs))
return nullptr;
return std::make_unique<MemorySongEnumerator>(std::move(songs));
}
static const char *const pls_suffixes[] = {
"pls",
nullptr
};
static const char *const pls_mime_types[] = {
"audio/x-scpls",
nullptr
};
const PlaylistPlugin pls_playlist_plugin =
PlaylistPlugin("pls", pls_open_stream)
.WithSuffixes(pls_suffixes)
.WithMimeTypes(pls_mime_types);
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