mpd/src/db/DatabasePrint.cxx

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/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* 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 "DatabasePrint.hxx"
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#include "Selection.hxx"
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#include "SongFilter.hxx"
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#include "SongPrint.hxx"
#include "TimePrint.hxx"
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#include "client/Client.hxx"
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#include "tag/Tag.hxx"
#include "LightSong.hxx"
#include "LightDirectory.hxx"
#include "PlaylistInfo.hxx"
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#include "Interface.hxx"
#include "fs/Traits.hxx"
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#include <functional>
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static const char *
ApplyBaseFlag(const char *uri, bool base)
{
if (base)
uri = PathTraitsUTF8::GetBase(uri);
return uri;
}
static void
PrintDirectoryURI(Client &client, bool base, const LightDirectory &directory)
{
client_printf(client, "directory: %s\n",
ApplyBaseFlag(directory.GetPath(), base));
}
static bool
PrintDirectoryBrief(Client &client, bool base, const LightDirectory &directory)
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{
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if (!directory.IsRoot())
PrintDirectoryURI(client, base, directory);
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return true;
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}
static bool
PrintDirectoryFull(Client &client, bool base, const LightDirectory &directory)
{
if (!directory.IsRoot()) {
PrintDirectoryURI(client, base, directory);
if (directory.mtime > 0)
time_print(client, "Last-Modified", directory.mtime);
}
return true;
}
static void
print_playlist_in_directory(Client &client, bool base,
const char *directory,
const char *name_utf8)
{
if (base || directory == nullptr)
client_printf(client, "playlist: %s\n",
ApplyBaseFlag(name_utf8, base));
else
client_printf(client, "playlist: %s/%s\n",
directory, name_utf8);
}
static void
print_playlist_in_directory(Client &client, bool base,
const LightDirectory *directory,
const char *name_utf8)
{
if (base || directory == nullptr || directory->IsRoot())
client_printf(client, "playlist: %s\n", name_utf8);
else
client_printf(client, "playlist: %s/%s\n",
directory->GetPath(), name_utf8);
}
static bool
PrintSongBrief(Client &client, bool base, const LightSong &song)
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{
song_print_uri(client, song, base);
if (song.tag->has_playlist)
/* this song file has an embedded CUE sheet */
print_playlist_in_directory(client, base,
song.directory, song.uri);
return true;
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}
static bool
PrintSongFull(Client &client, bool base, const LightSong &song)
{
song_print_info(client, song, base);
if (song.tag->has_playlist)
/* this song file has an embedded CUE sheet */
print_playlist_in_directory(client, base,
song.directory, song.uri);
return true;
}
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static bool
PrintPlaylistBrief(Client &client, bool base,
const PlaylistInfo &playlist,
const LightDirectory &directory)
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{
print_playlist_in_directory(client, base,
&directory, playlist.name.c_str());
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return true;
}
static bool
PrintPlaylistFull(Client &client, bool base,
const PlaylistInfo &playlist,
const LightDirectory &directory)
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{
print_playlist_in_directory(client, base,
&directory, playlist.name.c_str());
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if (playlist.mtime > 0)
time_print(client, "Last-Modified", playlist.mtime);
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return true;
}
bool
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db_selection_print(Client &client, const DatabaseSelection &selection,
bool full, bool base, Error &error)
{
const Database *db = client.GetDatabase(error);
if (db == nullptr)
return false;
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using namespace std::placeholders;
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const auto d = selection.filter == nullptr
? std::bind(full ? PrintDirectoryFull : PrintDirectoryBrief,
std::ref(client), base, _1)
: VisitDirectory();
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const auto s = std::bind(full ? PrintSongFull : PrintSongBrief,
std::ref(client), base, _1);
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const auto p = selection.filter == nullptr
? std::bind(full ? PrintPlaylistFull : PrintPlaylistBrief,
std::ref(client), base, _1, _2)
: VisitPlaylist();
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return db->Visit(selection, d, s, p, error);
}
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struct SearchStats {
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unsigned numberOfSongs;
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unsigned long playTime;
};
static void
printSearchStats(Client &client, const SearchStats &stats)
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{
client_printf(client, "songs: %u\n", stats.numberOfSongs);
client_printf(client, "playtime: %lu\n", stats.playTime);
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}
static bool
stats_visitor_song(SearchStats &stats, const LightSong &song)
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{
stats.numberOfSongs++;
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stats.playTime += song.GetDuration();
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return true;
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}
bool
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searchStatsForSongsIn(Client &client, const char *name,
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const SongFilter *filter,
Error &error)
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{
const Database *db = client.GetDatabase(error);
if (db == nullptr)
return false;
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const DatabaseSelection selection(name, true, filter);
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SearchStats stats;
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stats.numberOfSongs = 0;
stats.playTime = 0;
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using namespace std::placeholders;
const auto f = std::bind(stats_visitor_song, std::ref(stats),
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_1);
if (!db->Visit(selection, f, error))
return false;
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printSearchStats(client, stats);
return true;
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}
bool
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printAllIn(Client &client, const char *uri_utf8, Error &error)
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{
const DatabaseSelection selection(uri_utf8, true);
return db_selection_print(client, selection, false, false, error);
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}
bool
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printInfoForAllIn(Client &client, const char *uri_utf8,
Error &error)
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{
const DatabaseSelection selection(uri_utf8, true);
return db_selection_print(client, selection, true, false, error);
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}
static bool
PrintSongURIVisitor(Client &client, const LightSong &song)
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{
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song_print_uri(client, song);
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return true;
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}
static bool
PrintUniqueTag(Client &client, TagType tag_type,
const Tag &tag)
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{
const char *value = tag.GetValue(tag_type);
assert(value != nullptr);
client_printf(client, "%s: %s\n", tag_item_names[tag_type], value);
for (unsigned i = 0, n = tag.num_items; i < n; i++) {
const TagItem &item = *tag.items[i];
if (item.type != tag_type)
client_printf(client, "%s: %s\n",
tag_item_names[item.type], item.value);
}
return true;
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}
bool
listAllUniqueTags(Client &client, unsigned type, uint32_t group_mask,
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const SongFilter *filter,
Error &error)
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{
const Database *db = client.GetDatabase(error);
if (db == nullptr)
return false;
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const DatabaseSelection selection("", true, filter);
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if (type == LOCATE_TAG_FILE_TYPE) {
using namespace std::placeholders;
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const auto f = std::bind(PrintSongURIVisitor,
std::ref(client), _1);
return db->Visit(selection, f, error);
} else {
assert(type < TAG_NUM_OF_ITEM_TYPES);
using namespace std::placeholders;
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const auto f = std::bind(PrintUniqueTag, std::ref(client),
(TagType)type, _1);
return db->VisitUniqueTags(selection, (TagType)type,
group_mask,
f, error);
}
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}