423 lines
13 KiB
C++
423 lines
13 KiB
C++
/*
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* Strawberry Music Player
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* This file was part of Clementine.
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* Copyright 2012, Martin Björklund <mbj4668@gmail.com>
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* Copyright 2016, Jonas Kvinge <jonas@jkvinge.net>
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*
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* Strawberry 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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*
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* Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include <memory>
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#include <algorithm>
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#include <type_traits>
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#include <QtGlobal>
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#include <QObject>
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#include <QByteArray>
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#include <QList>
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#include <QPair>
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#include <QSet>
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#include <QMap>
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#include <QVariant>
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#include <QString>
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#include <QStringList>
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#include <QUrl>
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#include <QUrlQuery>
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#include <QNetworkAccessManager>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QJsonDocument>
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#include <QJsonObject>
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#include <QJsonValue>
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#include <QJsonArray>
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#include <QtDebug>
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#include "core/application.h"
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#include "core/logging.h"
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#include "core/network.h"
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#include "core/utilities.h"
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#include "coverprovider.h"
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#include "albumcoverfetcher.h"
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#include "discogscoverprovider.h"
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const char *DiscogsCoverProvider::kUrlSearch = "https://api.discogs.com/database/search";
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const char *DiscogsCoverProvider::kAccessKeyB64 = "dGh6ZnljUGJlZ1NEeXBuSFFxSVk=";
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const char *DiscogsCoverProvider::kSecretKeyB64 = "ZkFIcmlaSER4aHhRSlF2U3d0bm5ZVmdxeXFLWUl0UXI=";
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DiscogsCoverProvider::DiscogsCoverProvider(Application *app, QObject *parent) : CoverProvider("Discogs", false, false, 0.0, false, false, app, parent), network_(new NetworkAccessManager(this)) {}
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DiscogsCoverProvider::~DiscogsCoverProvider() {
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requests_search_.clear();
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}
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bool DiscogsCoverProvider::StartSearch(const QString &artist, const QString &album, const QString &title, const int id) {
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Q_UNUSED(title);
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std::shared_ptr<DiscogsCoverSearchContext> search = std::make_shared<DiscogsCoverSearchContext>();
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search->id = id;
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search->artist = artist;
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search->album = album;
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requests_search_.insert(id, search);
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ParamList params = ParamList() << Param("type", "release");
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if (!search->artist.isEmpty()) {
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params.append(Param("artist", search->artist.toLower()));
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}
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if (!search->album.isEmpty()) {
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params.append(Param("release_title", search->album.toLower()));
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}
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QNetworkReply *reply = CreateRequest(QUrl(kUrlSearch), params);
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connect(reply, &QNetworkReply::finished, [=] { HandleSearchReply(reply, id); });
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return true;
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}
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void DiscogsCoverProvider::CancelSearch(const int id) {
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if (requests_search_.contains(id)) requests_search_.remove(id);
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}
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QNetworkReply *DiscogsCoverProvider::CreateRequest(QUrl url, const ParamList ¶ms_provided) {
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ParamList params = ParamList() << Param("key", QByteArray::fromBase64(kAccessKeyB64))
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<< Param("secret", QByteArray::fromBase64(kSecretKeyB64))
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<< params_provided;
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QUrlQuery url_query;
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QStringList query_items;
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// Encode the arguments
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typedef QPair<QByteArray, QByteArray> EncodedParam;
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for (const Param ¶m : params) {
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EncodedParam encoded_param(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
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query_items << QString(encoded_param.first + "=" + encoded_param.second);
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url_query.addQueryItem(encoded_param.first, encoded_param.second);
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}
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url.setQuery(url_query);
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// Sign the request
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const QByteArray data_to_sign = QString("GET\n%1\n%2\n%3").arg(url.host(), url.path(), query_items.join("&")).toUtf8();
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const QByteArray signature(Utilities::HmacSha256(QByteArray::fromBase64(kSecretKeyB64), data_to_sign));
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// Add the signature to the request
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url_query.addQueryItem("Signature", QUrl::toPercentEncoding(signature.toBase64()));
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QNetworkRequest req(url);
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req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
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QNetworkReply *reply = network_->get(req);
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return reply;
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}
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QByteArray DiscogsCoverProvider::GetReplyData(QNetworkReply *reply) {
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QByteArray data;
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if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
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data = reply->readAll();
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}
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else {
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if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
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// This is a network error, there is nothing more to do.
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QString error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
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Error(error);
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}
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else {
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// See if there is Json data containing "message" - then use that instead.
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data = reply->readAll();
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QString error;
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QJsonParseError json_error;
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QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
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if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
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QJsonObject json_obj = json_doc.object();
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if (json_obj.contains("message")) {
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error = json_obj["message"].toString();
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}
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}
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if (error.isEmpty()) {
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if (reply->error() != QNetworkReply::NoError) {
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error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
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}
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else {
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error = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
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}
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}
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Error(error);
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}
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return QByteArray();
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}
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return data;
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}
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QJsonObject DiscogsCoverProvider::ExtractJsonObj(const QByteArray &data) {
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QJsonParseError error;
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QJsonDocument json_doc = QJsonDocument::fromJson(data, &error);
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if (error.error != QJsonParseError::NoError) {
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Error("Reply from server missing Json data.", data);
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return QJsonObject();
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}
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if (json_doc.isEmpty()) {
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Error("Received empty Json document.", json_doc);
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return QJsonObject();
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}
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if (!json_doc.isObject()) {
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Error("Json document is not an object.", json_doc);
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return QJsonObject();
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}
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QJsonObject json_obj = json_doc.object();
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if (json_obj.isEmpty()) {
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Error("Received empty Json object.", json_doc);
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return QJsonObject();
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}
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return json_obj;
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}
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void DiscogsCoverProvider::HandleSearchReply(QNetworkReply *reply, const int id) {
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reply->deleteLater();
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if (!requests_search_.contains(id)) {
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return;
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}
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std::shared_ptr<DiscogsCoverSearchContext> search = requests_search_.value(id);
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QByteArray data = GetReplyData(reply);
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if (data.isEmpty()) {
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EndSearch(search);
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return;
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}
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QJsonObject json_obj = ExtractJsonObj(data);
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if (json_obj.isEmpty()) {
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EndSearch(search);
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return;
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}
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QJsonValue value_results;
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if (json_obj.contains("results")) {
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value_results = json_obj["results"];
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}
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else if (json_obj.contains("message")) {
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QString message = json_obj["message"].toString();
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Error(QString("%1").arg(message));
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EndSearch(search);
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return;
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}
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else {
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Error("Json object is missing results.", json_obj);
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EndSearch(search);
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return;
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}
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if (!value_results.isArray()) {
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EndSearch(search);
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return;
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}
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QJsonArray array_results = value_results.toArray();
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if (array_results.isEmpty()) {
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EndSearch(search);
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return;
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}
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for (const QJsonValue &value_result : array_results) {
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if (!value_result.isObject()) {
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Error("Invalid Json reply, results value is not a object.", value_result);
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continue;
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}
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QJsonObject obj_result = value_result.toObject();
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if (!obj_result.contains("id") || !obj_result.contains("title") || !obj_result.contains("resource_url")) {
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Error("Invalid Json reply, results value object is missing ID, title or resource_url.", obj_result);
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continue;
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}
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quint64 release_id = obj_result["id"].toDouble();
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QUrl resource_url(obj_result["resource_url"].toString());
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if (!resource_url.isValid()) {
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continue;
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}
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if (search->requests_release_.contains(release_id)) {
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continue;
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}
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StartRelease(search, release_id, resource_url);
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}
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if (search->requests_release_.count() <= 0) {
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EndSearch(search);
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}
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}
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void DiscogsCoverProvider::StartRelease(std::shared_ptr<DiscogsCoverSearchContext> search, const quint64 release_id, const QUrl &url) {
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DiscogsCoverReleaseContext release(release_id, url);
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search->requests_release_.insert(release_id, release);
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QNetworkReply *reply = CreateRequest(release.url);
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connect(reply, &QNetworkReply::finished, [=] { HandleReleaseReply(reply, search->id, release.id); });
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}
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void DiscogsCoverProvider::HandleReleaseReply(QNetworkReply *reply, const int search_id, const quint64 release_id) {
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reply->deleteLater();
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if (!requests_search_.contains(search_id)) {
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return;
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}
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std::shared_ptr<DiscogsCoverSearchContext> search = requests_search_.value(search_id);
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if (!search->requests_release_.contains(release_id)) {
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return;
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}
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const DiscogsCoverReleaseContext &release = search->requests_release_.value(release_id);
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QByteArray data = GetReplyData(reply);
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if (data.isEmpty()) {
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EndSearch(search, release);
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return;
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}
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QJsonObject json_obj = ExtractJsonObj(data);
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if (json_obj.isEmpty()) {
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EndSearch(search, release);
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return;
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}
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if (!json_obj.contains("artists") || !json_obj.contains("title")) {
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Error("Json reply object is missing artists or title.", json_obj);
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EndSearch(search, release);
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return;
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}
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if (!json_obj.contains("images")) {
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EndSearch(search, release);
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return;
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}
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QJsonValue value_artists = json_obj["artists"];
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if (!value_artists.isArray()) {
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Error("Json reply object artists is not a array.", value_artists);
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EndSearch(search, release);
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return;
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}
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QJsonArray array_artists = value_artists.toArray();
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int i = 0;
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QString artist;
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for (const QJsonValue &value_artist : array_artists) {
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if (!value_artist.isObject()) {
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Error("Invalid Json reply, atists array value is not a object.", value_artist);
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continue;
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}
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QJsonObject obj_artist = value_artist.toObject();
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if (!obj_artist.contains("name") ) {
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Error("Invalid Json reply, artists array value object is missing name.", obj_artist);
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continue;
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}
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artist = obj_artist["name"].toString();
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++i;
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if (artist == search->artist) break;
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}
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if (artist.isEmpty()) {
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EndSearch(search, release);
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return;
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}
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if (i > 1 && artist != search->artist) artist = "Various artists";
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QString album = json_obj["title"].toString();
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if (artist != search->artist && album != search->album) {
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EndSearch(search, release);
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return;
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}
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QJsonValue value_images = json_obj["images"];
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if (!value_images.isArray()) {
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Error("Json images is not an array.");
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EndSearch(search, release);
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return;
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}
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QJsonArray array_images = value_images.toArray();
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if (array_images.isEmpty()) {
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Error("Invalid Json reply, images array is empty.");
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EndSearch(search, release);
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return;
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}
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for (const QJsonValue &value_image : array_images) {
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if (!value_image.isObject()) {
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Error("Invalid Json reply, images array value is not an object.", value_image);
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continue;
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}
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QJsonObject obj_image = value_image.toObject();
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if (!obj_image.contains("type") || !obj_image.contains("resource_url") || !obj_image.contains("width") || !obj_image.contains("height") ) {
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Error("Invalid Json reply, images array value object is missing type, resource_url, width or height.", obj_image);
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continue;
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}
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QString type = obj_image["type"].toString();
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if (type != "primary") {
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continue;
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}
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int width = obj_image["width"].toInt();
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int height = obj_image["height"].toInt();
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if (width < 300 || height < 300) continue;
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const float aspect_score = 1.0 - float(std::max(width, height) - std::min(width, height)) / std::max(height, width);
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if (aspect_score < 0.85) continue;
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CoverSearchResult cover_result;
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cover_result.artist = artist;
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cover_result.album = album;
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cover_result.image_url = QUrl(obj_image["resource_url"].toString());
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if (cover_result.image_url.isEmpty()) continue;
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search->results.append(cover_result);
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}
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EndSearch(search, release);
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}
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void DiscogsCoverProvider::EndSearch(std::shared_ptr<DiscogsCoverSearchContext> search, const DiscogsCoverReleaseContext &release) {
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if (search->requests_release_.contains(release.id)) {
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search->requests_release_.remove(release.id);
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}
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if (search->requests_release_.count() <= 0) {
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requests_search_.remove(search->id);
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emit SearchFinished(search->id, search->results);
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}
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}
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void DiscogsCoverProvider::Error(const QString &error, const QVariant &debug) {
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qLog(Error) << "Discogs:" << error;
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if (debug.isValid()) qLog(Debug) << debug;
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}
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