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Clementine-audio-player-Mac.../3rdparty/libechonest/Parsing.cpp

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/****************************************************************************************
* Copyright (c) 2010 Leo Franchi <lfranchi@kde.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, see <http://www.gnu.org/licenses/>. *
****************************************************************************************/
#include "Parsing_p.h"
#include "Util.h"
#include <QNetworkReply>
#include "Artist.h"
#include <QDateTime>
void Echonest::Parser::checkForErrors( QNetworkReply* reply ) throw( Echonest::ParseError )
{
if( !reply )
throw ParseError( Echonest::UnknownError );
// TODO sometimes this returns false when it shouldn't be? what's going on..
// if( !reply->isFinished() )
// throw ParseError( Echonest::UnfinishedQuery );
//
if( reply->error() != QNetworkReply::NoError ) {
ParseError err( Echonest::NetworkError );
err.setNetworkError( reply->error() );
throw err;
}
}
void Echonest::Parser::readStatus( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
if( xml.readNextStartElement() ) {
// sanity checks
if( xml.atEnd() || xml.name() != QLatin1String( "response" ) )
throw ParseError( UnknownParseError );
if( xml.readNextStartElement() ) {
if( xml.atEnd() || xml.name() != "status" )
throw ParseError( UnknownParseError );
// only check the error code for now
xml.readNextStartElement();
double version = xml.readElementText().toDouble();
// TODO use version for something?
Q_UNUSED(version);
xml.readNextStartElement();
Echonest::ErrorType code = static_cast< Echonest::ErrorType >( xml.readElementText().toInt() );
xml.readNextStartElement();
QString msg = xml.readElementText();
xml.readNextStartElement();
if( code != Echonest::NoError ) {
throw ParseError( code );
}
xml.readNext();
}
} else {
throw ParseError( UnknownParseError );
}
}
QVector< Echonest::Song > Echonest::Parser::parseSongList( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
QVector< Echonest::Song > songs;
xml.readNext();
while( !( xml.name() == "songs" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
// parse a song
songs.append( parseSong( xml ) );
}
return songs;
}
Echonest::Song Echonest::Parser::parseSong( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "song" )
throw ParseError( Echonest::UnknownParseError );
Echonest::Song song;
while( !( xml.name() == "song" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
if( xml.name() == "id" && xml.isStartElement() )
song.setId( xml.readElementText().toLatin1() );
else if( xml.name() == "title" && xml.isStartElement() )
song.setTitle( xml.readElementText() );
else if( xml.name() == "artist_id" && xml.isStartElement() )
song.setArtistId( xml.readElementText().toLatin1() );
else if( xml.name() == "artist_name" && xml.isStartElement() )
song.setArtistName( xml.readElementText() );
else if( xml.name() == "song_hotttnesss" && xml.isStartElement() )
song.setHotttnesss( xml.readElementText().toDouble() );
else if( xml.name() == "artist_hotttnesss" && xml.isStartElement() )
song.setArtistHotttnesss( xml.readElementText().toDouble() );
else if( xml.name() == "artist_familiarity" && xml.isStartElement() )
song.setArtistFamiliarity( xml.readElementText().toDouble() );
else if( xml.name() == "artist_location" && xml.isStartElement() ) {
while( !( xml.name() == "location" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
xml.readNextStartElement();
if( xml.name() == "location" )
song.setArtistLocation( xml.readElementText() );
}
xml.readNext();
} else if( xml.name() == "audio_summary" && xml.isStartElement() ) {
song.setAudioSummary( parseAudioSummary( xml ) );
}
xml.readNext();
}
xml.readNext(); // skip past the last </song>
return song;
}
Echonest::Track Echonest::Parser::parseTrack( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "track" ) {
throw ParseError( Echonest::UnknownParseError );
}
Echonest::Track track;
while( !( xml.name() == "track" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
if( xml.name() == "id" && xml.isStartElement() )
track.setId( xml.readElementText().toLatin1() );
else if( xml.name() == "title" && xml.isStartElement() )
track.setTitle( xml.readElementText() );
else if( xml.name() == "artist" && xml.isStartElement() )
track.setArtist( xml.readElementText() );
else if( xml.name() == "status" && xml.isStartElement() )
track.setStatus( Echonest::statusToEnum( xml.readElementText() ) );
else if( xml.name() == "analyzer_version" && xml.isStartElement() )
track.setAnalyzerVersion( xml.readElementText() );
else if( xml.name() == "release" && xml.isStartElement() )
track.setRelease( xml.readElementText() );
else if( xml.name() == "audio_md5" && xml.isStartElement() )
track.setAudioMD5( xml.readElementText().toLatin1() );
else if( xml.name() == "bitrate" && xml.isStartElement() )
track.setBitrate( xml.readElementText().toInt() );
else if( xml.name() == "samplerate" && xml.isStartElement() )
track.setSamplerate( xml.readElementText().toInt() );
else if( xml.name() == "md5" && xml.isStartElement() )
track.setMD5( xml.readElementText().toLatin1() );
else if( xml.name() == "audio_summary" && xml.isStartElement() ) {
track.setAudioSummary( parseAudioSummary( xml ) );
continue;
}
xml.readNext();
}
xml.readNext(); // skip past the last
return track;
}
Echonest::AudioSummary Echonest::Parser::parseAudioSummary( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "audio_summary" ) {
throw ParseError( Echonest::UnknownParseError );
}
Echonest::AudioSummary summary;
while( !( xml.name() == "audio_summary" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
if( xml.name() == "key" && xml.isStartElement() )
summary.setKey( xml.readElementText().toInt() );
else if( xml.name() == "analysis_url" && xml.isStartElement() )
summary.setAnalysisUrl( xml.readElementText() );
else if( xml.name() == "tempo" && xml.isStartElement() )
summary.setTempo( xml.readElementText().toDouble() );
else if( xml.name() == "mode" && xml.isStartElement() )
summary.setMode( xml.readElementText().toInt() );
else if( xml.name() == "time_signature" && xml.isStartElement() )
summary.setTimeSignature( xml.readElementText().toInt() );
else if( xml.name() == "duration" && xml.isStartElement() )
summary.setDuration( xml.readElementText().toDouble() );
else if( xml.name() == "loudness" && xml.isStartElement() )
summary.setLoudness( xml.readElementText().toDouble() );
xml.readNext();
}
return summary;
}
Echonest::Artists Echonest::Parser::parseArtists( QXmlStreamReader& xml )
{
// we expect to be in an <artists> start element
if( xml.atEnd() || xml.name() != "artists" || !xml.isStartElement() )
throw ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::Artists artists;
while( !xml.atEnd() && ( xml.name() != "artists" || !xml.isEndElement() ) ) {
if( xml.atEnd() || xml.name() != "artist" || !xml.isStartElement() )
throw Echonest::ParseError( Echonest::UnknownParseError );
Echonest::Artist artist;
while( !xml.atEnd() && ( xml.name() != "artist" || !xml.isEndElement() ) ) {
parseArtistInfo( xml, artist );
xml.readNextStartElement();
}
artists.append( artist );
xml.readNext();
}
return artists;
}
int Echonest::Parser::parseArtistInfoOrProfile( QXmlStreamReader& xml , Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.name() == "start" ) { // this is an individual info query, so lets read it
xml.readNextStartElement();
xml.readNext();
int results = -1;
if( xml.name() == "total" ) {
results = xml.readElementText().toInt();
xml.readNextStartElement();
}
parseArtistInfo( xml, artist );
return results;
} else if( xml.name() == "songs" ) {
parseArtistSong( xml, artist );
} else if( xml.name() == "urls" ) { // urls also has no start/total
parseUrls( xml, artist );
} else { // this is either a profile query, or a familiarity or hotttness query, so save all the data we find
while( !( xml.name() == "artist" && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
parseArtistInfo( xml, artist );
xml.readNextStartElement();
}
}
return 0;
}
void Echonest::Parser::parseArtistInfo( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
// parse each sort of artist information
if( xml.name() == "audio" ) {
parseAudio( xml, artist );
} else if( xml.name() == "biographies" ) {
parseBiographies( xml, artist );
} else if( xml.name() == "familiarity" ) {
artist.setFamiliarity( xml.readElementText().toDouble() );
} else if( xml.name() == "hotttnesss" ) {
artist.setHotttnesss( xml.readElementText().toDouble() );
} else if( xml.name() == "images" ) {
parseImages( xml, artist );
} else if( xml.name() == "news" ) {
parseNewsOrBlogs( xml, artist, true );
} else if( xml.name() == "blogs" ) {
parseNewsOrBlogs( xml, artist, false );
} else if( xml.name() == "reviews" ) {
parseReviews( xml, artist );
} else if( xml.name() == "terms" ) {
parseTerms( xml, artist );
} else if( xml.name() == "urls" ) {
parseTerms( xml, artist );
} else if( xml.name() == "songs" ) {
parseArtistSong( xml, artist );
} else if( xml.name() == "video" ) {
parseVideos( xml, artist );
} else if( xml.name() == "foreign_ids" ) {
parseForeignIds( xml, artist );
} else if( xml.name() == "name" ) {
artist.setName( xml.readElementText() );
} else if( xml.name() == "id" ) {
artist.setId( xml.readElementText().toLatin1() );
}
}
// parse each type of artist attribute
void Echonest::Parser::parseAudio( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "audio" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::AudioList audioList;
while( !xml.atEnd() && ( xml.name() != "audio" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
Echonest::AudioFile audio;
do {
xml.readNext();
if( xml.name() == "title" )
audio.setTitle( xml.readElementText() );
else if( xml.name() == "url" )
audio.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "artist" )
audio.setArtist( xml.readElementText() );
else if( xml.name() == "date" )
audio.setDate( QDateTime::fromString( xml.readElementText(), Qt::ISODate ) );
else if( xml.name() == "length" )
audio.setLength( xml.readElementText().toDouble() );
else if( xml.name() == "link" )
audio.setLink( QUrl( xml.readElementText() ) );
else if( xml.name() == "release" )
audio.setRelease( xml.readElementText() );
else if( xml.name() == "id" )
audio.setId( xml.readElementText().toLatin1() );
} while( !xml.atEnd() && ( xml.name() != "audio" || xml.tokenType() != QXmlStreamReader::EndElement ) );
audioList.append( audio );
xml.readNext();
}
artist.setAudio( audioList );
}
void Echonest::Parser::parseBiographies( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "biographies" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::BiographyList bios;
while( !xml.atEnd() && ( xml.name() != "biographies" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
Echonest::Biography bio;
do {
xml.readNext();
if( xml.name() == "text" )
bio.setText( xml.readElementText() );
else if( xml.name() == "site" )
bio.setSite( xml.readElementText() );
else if( xml.name() == "url" )
bio.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "license" )
bio.setLicense( parseLicense( xml) );
} while( !xml.atEnd() && ( xml.name() != "biography" || xml.tokenType() != QXmlStreamReader::EndElement ) );
bios.append( bio );
xml.readNext();
}
artist.setBiographies( bios );
}
void Echonest::Parser::parseImages( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "images" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::ArtistImageList imgs;
while( !xml.atEnd() && ( xml.name() != "images" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
Echonest::ArtistImage img;
do {
xml.readNext();
if( xml.name() == "url" )
img.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "license" )
img.setLicense( parseLicense( xml) );
} while( !xml.atEnd() && ( xml.name() != "image" || xml.tokenType() != QXmlStreamReader::EndElement ) );
imgs.append( img );
xml.readNext();
}
artist.setImages( imgs );
}
void Echonest::Parser::parseNewsOrBlogs( QXmlStreamReader& xml, Echonest::Artist& artist, bool news ) throw( Echonest::ParseError )
{
if( news && ( xml.atEnd() || xml.name() != "news" || xml.tokenType() != QXmlStreamReader::StartElement ) )
throw Echonest::ParseError( Echonest::UnknownParseError );
else if( !news && ( xml.atEnd() || xml.name() != "blogs" || xml.tokenType() != QXmlStreamReader::StartElement ) )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::NewsList newsList;
while( !( ( xml.name() == "news" || xml.name() == "blogs" ) && xml.tokenType() == QXmlStreamReader::EndElement ) ) {
Echonest::NewsArticle news;
do {
xml.readNextStartElement();
if( xml.name() == "name" )
news.setName( xml.readElementText() );
else if( xml.name() == "url" )
news.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "summary" )
news.setSummary( xml.readElementText() );
else if( xml.name() == "date_found" )
news.setDateFound( QDateTime::fromString( xml.readElementText(), Qt::ISODate ) );
else if( xml.name() == "id" )
news.setId( xml.readElementText().toLatin1() );
else if( xml.name() == "date_posted" )
news.setDatePosted( QDateTime::fromString( xml.readElementText(), Qt::ISODate ) );
} while( !( ( xml.name() == "news" || xml.name() == "blog" ) && xml.tokenType() == QXmlStreamReader::EndElement ) );
newsList.append( news );
xml.readNext();
}
if( news )
artist.setNews( newsList );
else
artist.setBlogs( newsList );
}
void Echonest::Parser::parseReviews( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "reviews" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::ReviewList reviews;
while( !xml.atEnd() && ( xml.name() != "reviews" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
Echonest::Review review;
do {
xml.readNextStartElement();
if( xml.name() == "url" )
review.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "name" )
review.setName( xml.readElementText() );
else if( xml.name() == "summary" )
review.setSummary( xml.readElementText() );
else if( xml.name() == "date_found" )
review.setDateFound( QDateTime::fromString( xml.readElementText(), Qt::ISODate ) );
else if( xml.name() == "image" )
review.setImageUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "release" )
review.setRelease( xml.readElementText() );
else if( xml.name() == "id" )
review.setId( xml.readElementText().toLatin1() );
} while( !xml.atEnd() && ( xml.name() != "review" || xml.tokenType() != QXmlStreamReader::EndElement ) );
reviews.append( review );
xml.readNext();
}
artist.setReviews( reviews );
}
void Echonest::Parser::parseArtistSong( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "songs" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
Echonest::SongList songs;
while( !xml.atEnd() && ( xml.name() != "songs" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
if( xml.name() == "song" && xml.isStartElement() )
{
Echonest::Song song;
while( !xml.atEnd() && ( xml.name() != "song" || !xml.isEndElement() ) ) {
if( xml.name() == "id" && xml.isStartElement() )
song.setId( xml.readElementText().toLatin1() );
else if( xml.name() == "title" && xml.isStartElement() )
song.setTitle( xml.readElementText() );
xml.readNextStartElement();
}
songs.append( song );
}
xml.readNext();
}
artist.setSongs( songs );
}
void Echonest::Parser::parseTerms( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "terms" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
artist.setTerms( parseTermList( xml ) );
}
void Echonest::Parser::parseUrls( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "urls" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
xml.readNextStartElement();
xml.readNextStartElement();
while( !xml.atEnd() && ( xml.name() != "urls" || !xml.isEndElement() ) ) {
if( xml.name() == "lastfm_url" )
artist.setLastFmUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "aolmusic_url" )
artist.setAolMusicUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "myspace_url" )
artist.setMyspaceUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "amazon_url" )
artist.setAmazonUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "itunes_url" )
artist.setItunesUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "mb_url" )
artist.setMusicbrainzUrl( QUrl( xml.readElementText() ) );
xml.readNextStartElement();
}
xml.readNextStartElement();
}
void Echonest::Parser::parseVideos( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "video" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
Echonest::VideoList videos;
while( xml.name() == "video" && xml.isStartElement() ) {
Echonest::Video video;
while( !xml.atEnd() && ( xml.name() != "video" || !xml.isEndElement() ) ) {
if( xml.name() == "title" )
video.setTitle( xml.readElementText() );
else if( xml.name() == "url" )
video.setUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "site" )
video.setSite( xml.readElementText() );
else if( xml.name() == "date_found" )
video.setDateFound( QDateTime::fromString( xml.readElementText(), Qt::ISODate ) );
else if( xml.name() == "image_url" )
video.setImageUrl( QUrl( xml.readElementText() ) );
else if( xml.name() == "id" )
video.setId( xml.readElementText().toLatin1() );
xml.readNextStartElement();
}
videos.append( video );
xml.readNextStartElement();
}
artist.setVideos( videos );
}
Echonest::TermList Echonest::Parser::parseTermList( QXmlStreamReader& xml )
{
if( xml.atEnd() || xml.name() != "terms" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
Echonest::TermList terms;
while( xml.name() == "terms" && xml.isStartElement() ) {
Echonest::Term term;
while( !xml.atEnd() && ( xml.name() != "terms" || !xml.isEndElement() ) ) {
if( xml.name() == "frequency" )
term.setFrequency( xml.readElementText().toDouble() );
else if( xml.name() == "name" )
term.setName( xml.readElementText() );
else if( xml.name() == "weight" )
term.setWeight( xml.readElementText().toDouble() );
xml.readNextStartElement();
}
terms.append( term );
xml.readNextStartElement();
}
return terms;
}
void Echonest::Parser::parseForeignIds( QXmlStreamReader& xml, Echonest::Artist& artist ) throw( Echonest::ParseError )
{
}
Echonest::License Echonest::Parser::parseLicense( QXmlStreamReader& xml ) throw( Echonest::ParseError )
{
if( xml.atEnd() || xml.name() != "license" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
Echonest::License license;
while( !xml.atEnd() && ( xml.name() != "license" || xml.tokenType() != QXmlStreamReader::EndElement ) ) {
if( xml.name() == "type" )
license.type = xml.readElementText();
else if( xml.name() == "attribution" )
license.attribution = xml.readElementText();
else if( xml.name() == "url" )
license.url = QUrl( xml.readElementText() );
xml.readNext();
}
xml.readNextStartElement();
return license;
}
QByteArray Echonest::Parser::parsePlaylistSessionId( QXmlStreamReader& xml ) throw( ParseError )
{
if( xml.atEnd() || xml.name() != "session_id" || xml.tokenType() != QXmlStreamReader::StartElement )
throw Echonest::ParseError( Echonest::UnknownParseError );
QByteArray sessionId = xml.readElementText().toLatin1();
xml.readNext(); //read to next start element
return sessionId;
}
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