138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine 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 3 of the License, or
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(at your option) any later version.
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Clementine 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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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MUSICBRAINZCLIENT_H
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#define MUSICBRAINZCLIENT_H
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#include <QHash>
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#include <QMap>
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#include <QObject>
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#include <QXmlStreamReader>
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class NetworkTimeouts;
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class QNetworkAccessManager;
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class QNetworkReply;
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class MusicBrainzClient : public QObject {
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Q_OBJECT
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// Gets metadata for a particular MBID.
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// An MBID is created from a fingerprint using MusicDnsClient.
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// You can create one MusicBrainzClient and make multiple requests using it.
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// IDs are provided by the caller when a request is started and included in
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// the Finished signal - they have no meaning to MusicBrainzClient.
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public:
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MusicBrainzClient(QObject* parent = nullptr);
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struct Result {
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Result() : duration_msec_(0), track_(0), year_(-1) {}
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bool operator<(const Result& other) const {
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#define cmp(field) \
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if (field < other.field) return true; \
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if (field > other.field) return false;
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cmp(track_);
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cmp(year_);
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cmp(title_);
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cmp(artist_);
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return false;
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#undef cmp
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}
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bool operator==(const Result& other) const {
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return title_ == other.title_ && artist_ == other.artist_ &&
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album_ == other.album_ && duration_msec_ == other.duration_msec_ &&
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track_ == other.track_ && year_ == other.year_;
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}
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QString title_;
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QString artist_;
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QString album_;
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int duration_msec_;
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int track_;
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int year_;
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};
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typedef QList<Result> ResultList;
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// Starts a request and returns immediately. Finished() will be emitted
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// later with the same ID.
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void Start(int id, const QString& mbid);
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void StartDiscIdRequest(const QString& discid);
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// Cancels the request with the given ID. Finished() will never be emitted
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// for that ID. Does nothing if there is no request with the given ID.
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void Cancel(int id);
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// Cancels all requests. Finished() will never be emitted for any pending
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// requests.
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void CancelAll();
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signals:
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// Finished signal emitted when fechting songs tags
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void Finished(int id, const MusicBrainzClient::ResultList& result);
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// Finished signal emitted when fechting album's songs tags using DiscId
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void Finished(const QString& artist, const QString album,
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const MusicBrainzClient::ResultList& result);
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private slots:
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void RequestFinished(QNetworkReply* reply, int id);
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void DiscIdRequestFinished(QNetworkReply* reply);
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private:
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struct Release {
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Release() : track_(0), year_(0) {}
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Result CopyAndMergeInto(const Result& orig) const {
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Result ret(orig);
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ret.album_ = album_;
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ret.track_ = track_;
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ret.year_ = year_;
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return ret;
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}
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QString album_;
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int track_;
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int year_;
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};
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static ResultList ParseTrack(QXmlStreamReader* reader);
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static void ParseArtist(QXmlStreamReader* reader, QString* artist);
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static Release ParseRelease(QXmlStreamReader* reader);
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static ResultList UniqueResults(const ResultList& results);
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private:
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static const char* kTrackUrl;
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static const char* kDiscUrl;
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static const char* kDateRegex;
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static const int kDefaultTimeout;
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QNetworkAccessManager* network_;
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NetworkTimeouts* timeouts_;
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QMap<int, QNetworkReply*> requests_;
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};
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inline uint qHash(const MusicBrainzClient::Result& result) {
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return qHash(result.album_) ^ qHash(result.artist_) ^ result.duration_msec_ ^
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qHash(result.title_) ^ result.track_ ^ result.year_;
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}
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#endif // MUSICBRAINZCLIENT_H
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