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407 lines
9.1 KiB
407 lines
9.1 KiB
/*************************************************************************** |
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* Copyright (C) 2008-2014 by Andrzej Rybczak * |
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* electricityispower@gmail.com * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the * |
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* Free Software Foundation, Inc., * |
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * |
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***************************************************************************/ |
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#include <cassert> |
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#include <cstring> |
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#include <boost/format.hpp> |
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#include <boost/lexical_cast.hpp> |
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#include <iostream> |
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#include <memory> |
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#include "song.h" |
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#include "utility/type_conversions.h" |
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#include "utility/wide_string.h" |
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#include "window.h" |
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namespace { |
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size_t calc_hash(const char* s, unsigned seed = 0) |
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{ |
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size_t hash = seed; |
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while (*s) |
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hash = hash * 101 + *s++; |
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return hash; |
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} |
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} |
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namespace MPD {// |
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std::string Song::get(mpd_tag_type type, unsigned idx) const |
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{ |
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std::string result; |
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const char *tag = mpd_song_get_tag(m_song.get(), type, idx); |
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if (tag) |
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result = tag; |
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return result; |
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} |
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Song::Song(mpd_song *s) |
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{ |
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assert(s); |
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m_song = std::shared_ptr<mpd_song>(s, mpd_song_free); |
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m_hash = calc_hash(mpd_song_get_uri(s)); |
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} |
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std::string Song::getURI(unsigned idx) const |
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{ |
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assert(m_song); |
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if (idx > 0) |
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return ""; |
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else |
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return mpd_song_get_uri(m_song.get()); |
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} |
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std::string Song::getName(unsigned idx) const |
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{ |
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assert(m_song); |
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mpd_song *s = m_song.get(); |
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const char *res = mpd_song_get_tag(s, MPD_TAG_NAME, idx); |
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if (!res && idx > 0) |
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return ""; |
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const char *uri = mpd_song_get_uri(s); |
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const char *name = strrchr(uri, '/'); |
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if (name) |
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return name+1; |
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else |
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return uri; |
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} |
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std::string Song::getDirectory(unsigned idx) const |
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{ |
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assert(m_song); |
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if (idx > 0 || isStream()) |
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return ""; |
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const char *uri = mpd_song_get_uri(m_song.get()); |
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const char *name = strrchr(uri, '/'); |
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if (name) |
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return std::string(uri, name-uri); |
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else |
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return "/"; |
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} |
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std::string Song::getArtist(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_ARTIST, idx); |
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} |
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std::string Song::getTitle(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_TITLE, idx); |
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} |
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std::string Song::getAlbum(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_ALBUM, idx); |
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} |
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std::string Song::getAlbumArtist(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_ALBUM_ARTIST, idx); |
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} |
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std::string Song::getTrack(unsigned idx) const |
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{ |
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assert(m_song); |
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std::string track = get(MPD_TAG_TRACK, idx); |
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if ((track.length() == 1 && track[0] != '0') |
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|| (track.length() > 3 && track[1] == '/')) |
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track = "0"+track; |
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return track; |
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} |
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std::string Song::getTrackNumber(unsigned idx) const |
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{ |
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assert(m_song); |
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std::string track = getTrack(idx); |
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size_t slash = track.find('/'); |
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if (slash != std::string::npos) |
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track.resize(slash); |
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return track; |
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} |
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std::string Song::getDate(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_DATE, idx); |
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} |
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std::string Song::getGenre(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_GENRE, idx); |
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} |
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std::string Song::getComposer(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_COMPOSER, idx); |
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} |
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std::string Song::getPerformer(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_PERFORMER, idx); |
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} |
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std::string Song::getDisc(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_DISC, idx); |
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} |
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std::string Song::getComment(unsigned idx) const |
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{ |
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assert(m_song); |
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return get(MPD_TAG_COMMENT, idx); |
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} |
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std::string Song::getLength(unsigned idx) const |
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{ |
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assert(m_song); |
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if (idx > 0) |
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return ""; |
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unsigned len = getDuration(); |
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if (len > 0) |
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return ShowTime(len); |
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else |
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return "-:--"; |
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} |
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std::string Song::getPriority(unsigned idx) const |
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{ |
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assert(m_song); |
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if (idx > 0) |
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return ""; |
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return boost::lexical_cast<std::string>(getPrio()); |
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} |
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std::string MPD::Song::getTags(GetFunction f, const std::string &tags_separator) const |
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{ |
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assert(m_song); |
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unsigned idx = 0; |
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std::string result; |
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for (std::string tag; !(tag = (this->*f)(idx)).empty(); ++idx) |
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{ |
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if (!result.empty()) |
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result += tags_separator; |
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result += tag; |
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} |
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return result; |
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} |
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unsigned Song::getDuration() const |
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{ |
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assert(m_song); |
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return mpd_song_get_duration(m_song.get()); |
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} |
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unsigned Song::getPosition() const |
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{ |
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assert(m_song); |
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return mpd_song_get_pos(m_song.get()); |
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} |
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unsigned Song::getID() const |
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{ |
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assert(m_song); |
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return mpd_song_get_id(m_song.get()); |
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} |
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unsigned Song::getPrio() const |
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{ |
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assert(m_song); |
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return mpd_song_get_prio(m_song.get()); |
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} |
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time_t Song::getMTime() const |
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{ |
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assert(m_song); |
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return mpd_song_get_last_modified(m_song.get()); |
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} |
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bool Song::isFromDatabase() const |
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{ |
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assert(m_song); |
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const char *uri = mpd_song_get_uri(m_song.get()); |
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return uri[0] != '/' || !strrchr(uri, '/'); |
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} |
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bool Song::isStream() const |
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{ |
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assert(m_song); |
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return !strncmp(mpd_song_get_uri(m_song.get()), "http://", 7); |
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} |
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bool Song::empty() const |
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{ |
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return m_song.get() == 0; |
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} |
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std::string Song::toString(const std::string &fmt, const std::string &tags_separator, const std::string &escape_chars) const |
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{ |
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assert(m_song); |
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std::string::const_iterator it = fmt.begin(); |
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return ParseFormat(it, tags_separator, escape_chars); |
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} |
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std::string Song::ShowTime(unsigned length) |
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{ |
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int hours = length/3600; |
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length -= hours*3600; |
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int minutes = length/60; |
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length -= minutes*60; |
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int seconds = length; |
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std::string result; |
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if (hours > 0) |
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result = (boost::format("%d:%02d:%02d") % hours % minutes % seconds).str(); |
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else |
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result = (boost::format("%d:%02d") % minutes % seconds).str(); |
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return result; |
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} |
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void MPD::Song::validateFormat(const std::string &fmt) |
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{ |
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int braces = 0; |
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for (std::string::const_iterator it = fmt.begin(); it != fmt.end(); ++it) |
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{ |
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if (*it == '{') |
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++braces; |
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else if (*it == '}') |
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--braces; |
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} |
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if (braces) |
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throw std::runtime_error("number of opening and closing braces is not equal"); |
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for (size_t i = fmt.find('%'); i != std::string::npos; i = fmt.find('%', i)) |
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{ |
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if (isdigit(fmt[++i])) |
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while (isdigit(fmt[++i])) { } |
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if (!charToGetFunction(fmt[i])) |
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throw std::runtime_error( |
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(boost::format("invalid character at position %1%: %2%") % (i+1) % fmt[i]).str() |
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); |
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} |
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} |
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std::string Song::ParseFormat(std::string::const_iterator &it, const std::string &tags_separator, |
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const std::string &escape_chars) const |
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{ |
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std::string result; |
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bool has_some_tags = 0; |
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MPD::Song::GetFunction get_fun = 0; |
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while (*++it != '}') |
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{ |
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while (*it == '{') |
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{ |
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std::string tags = ParseFormat(it, tags_separator, escape_chars); |
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if (!tags.empty()) |
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{ |
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has_some_tags = 1; |
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result += tags; |
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} |
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} |
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if (*it == '}') |
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break; |
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if (*it == '%') |
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{ |
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size_t delimiter = 0; |
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if (isdigit(*++it)) |
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{ |
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delimiter = atol(&*it); |
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while (isdigit(*++it)) { } |
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} |
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if (*it == '%') |
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{ |
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result += *it; |
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get_fun = 0; |
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} |
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else |
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get_fun = charToGetFunction(*it); |
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if (get_fun) |
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{ |
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std::string tag = getTags(get_fun, tags_separator); |
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if (!escape_chars.empty()) // prepend format escape character to all given chars to escape |
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{ |
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for (size_t i = 0; i < escape_chars.length(); ++i) |
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for (size_t j = 0; (j = tag.find(escape_chars[i], j)) != std::string::npos; j += 2) |
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tag.replace(j, 1, std::string(1, FormatEscapeCharacter) + escape_chars[i]); |
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} |
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if (!tag.empty() && (get_fun != &MPD::Song::getLength || getDuration() > 0)) |
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{ |
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if (delimiter && tag.size() > delimiter) |
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{ |
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// Shorten length string by just chopping off the tail |
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if (get_fun == &MPD::Song::getLength) |
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tag = tag.substr(0, delimiter); |
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else |
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tag = ToString(wideShorten(ToWString(tag), delimiter)); |
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} |
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has_some_tags = 1; |
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result += tag; |
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} |
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else |
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break; |
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} |
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} |
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else |
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result += *it; |
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} |
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int brace_counter = 0; |
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if (*it != '}' || !has_some_tags) |
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{ |
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for (; *it != '}' || brace_counter; ++it) |
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{ |
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if (*it == '{') |
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++brace_counter; |
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else if (*it == '}') |
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--brace_counter; |
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} |
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if (*++it == '|') |
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return ParseFormat(++it, tags_separator, escape_chars); |
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else |
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return ""; |
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} |
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else |
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{ |
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if (*(it+1) == '|') |
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{ |
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for (; *it != '}' || *(it+1) == '|' || brace_counter; ++it) |
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{ |
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if (*it == '{') |
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++brace_counter; |
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else if (*it == '}') |
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--brace_counter; |
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} |
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} |
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++it; |
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return result; |
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} |
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} |
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}
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