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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.
*/
#include "config.h"
#include "Mount.hxx"
#include "PrefixedLightSong.hxx"
#include "SongFilter.hxx"
#include "db/Selection.hxx"
#include "db/LightDirectory.hxx"
#include "db/Interface.hxx"
#include "fs/Traits.hxx"
#include <string>
struct PrefixedLightDirectory : LightDirectory {
std::string buffer;
PrefixedLightDirectory(const LightDirectory &directory,
const char *base)
:LightDirectory(directory),
buffer(IsRoot()
? std::string(base)
: PathTraitsUTF8::Build(base, uri)) {
uri = buffer.c_str();
}
};
static void
PrefixVisitDirectory(const char *base, const VisitDirectory &visit_directory,
const LightDirectory &directory)
{
visit_directory(PrefixedLightDirectory(directory, base));
}
static void
PrefixVisitSong(const char *base, const VisitSong &visit_song,
const LightSong &song)
{
visit_song(PrefixedLightSong(song, base));
}
static void
PrefixVisitPlaylist(const char *base, const VisitPlaylist &visit_playlist,
const PlaylistInfo &playlist,
const LightDirectory &directory)
{
visit_playlist(playlist,
PrefixedLightDirectory(directory, base));
}
void
WalkMount(const char *base, const Database &db,
const char* uri, bool recursive, const SongFilter *filter,
const VisitDirectory &visit_directory, const VisitSong &visit_song,
const VisitPlaylist &visit_playlist)
{
using namespace std::placeholders;
VisitDirectory vd;
if (visit_directory)
vd = std::bind(PrefixVisitDirectory,
base, std::ref(visit_directory), _1);
VisitSong vs;
if (visit_song)
vs = std::bind(PrefixVisitSong,
base, std::ref(visit_song), _1);
VisitPlaylist vp;
if (visit_playlist)
vp = std::bind(PrefixVisitPlaylist,
base, std::ref(visit_playlist), _1, _2);
SongFilter prefix_filter;
if (base != nullptr && filter != nullptr) {
/* if the SongFilter contains a LOCATE_TAG_BASE_TYPE
item, copy the SongFilter and drop the mount point
from the filter, because the mounted database
doesn't know its own location within MPD's VFS */
prefix_filter = filter->WithoutBasePrefix(base);
filter = &prefix_filter;
}
db.Visit(DatabaseSelection(uri, recursive, filter), vd, vs, vp);
}
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