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strawberry-audio-player-win.../src/covermanager/discogscoverprovider.cpp

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/*
* Strawberry Music Player
* This file was part of Clementine.
* Copyright 2012, Martin Björklund <mbj4668@gmail.com>
* Copyright 2016, Jonas Kvinge <jonas@jkvinge.net>
*
* Strawberry 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 3 of the License, or
* (at your option) any later version.
*
* Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include <QObject>
#include <QByteArray>
#include <QList>
#include <QPair>
#include <QMap>
#include <QSet>
#include <QVariant>
#include <QString>
#include <QStringBuilder>
#include <QStringList>
#include <QUrl>
#include <QUrlQuery>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QJsonDocument>
#include <QJsonObject>
#include <QVector>
#include "core/closure.h"
#include "core/logging.h"
#include "core/network.h"
#include "core/utilities.h"
#include "coverprovider.h"
#include "albumcoverfetcher.h"
#include "discogscoverprovider.h"
const char *DiscogsCoverProvider::kUrlSearch = "https://api.discogs.com/database/search";
const char *DiscogsCoverProvider::kUrlReleases = "https://api.discogs.com/releases";
const char *DiscogsCoverProvider::kAccessKeyB64 = "dGh6ZnljUGJlZ1NEeXBuSFFxSVk=";
const char *DiscogsCoverProvider::kSecretKeyB64 = "ZkFIcmlaSER4aHhRSlF2U3d0bm5ZVmdxeXFLWUl0UXI=";
DiscogsCoverProvider::DiscogsCoverProvider(QObject *parent) : CoverProvider("Discogs", false, parent), network_(new NetworkAccessManager(this)) {}
bool DiscogsCoverProvider::StartSearch(const QString &artist, const QString &album, int s_id) {
DiscogsCoverSearchContext *s_ctx = new DiscogsCoverSearchContext;
s_ctx->id = s_id;
s_ctx->artist = artist;
s_ctx->album = album;
s_ctx->r_count = 0;
requests_search_.insert(s_id, s_ctx);
SendSearchRequest(s_ctx);
return true;
}
void DiscogsCoverProvider::CancelSearch(int id) {
delete requests_search_.take(id);
}
bool DiscogsCoverProvider::StartRelease(DiscogsCoverSearchContext *s_ctx, int r_id, QString resource_url) {
DiscogsCoverReleaseContext *r_ctx = new DiscogsCoverReleaseContext;
s_ctx->r_count++;
r_ctx->id = r_id;
r_ctx->resource_url = resource_url;
r_ctx->s_id = s_ctx->id;
requests_release_.insert(r_id, r_ctx);
SendReleaseRequest(s_ctx, r_ctx);
return true;
}
void DiscogsCoverProvider::SendSearchRequest(DiscogsCoverSearchContext *s_ctx) {
typedef QPair<QString, QString> Arg;
typedef QList<Arg> ArgList;
typedef QPair<QByteArray, QByteArray> EncodedArg;
typedef QList<EncodedArg> EncodedArgList;
ArgList args = ArgList()
<< Arg("key", QByteArray::fromBase64(kAccessKeyB64))
<< Arg("secret", QByteArray::fromBase64(kSecretKeyB64));
args.append(Arg("type", "release"));
if (!s_ctx->artist.isEmpty()) {
args.append(Arg("artist", s_ctx->artist.toLower()));
}
if (!s_ctx->album.isEmpty()) {
args.append(Arg("release_title", s_ctx->album.toLower()));
}
QUrlQuery url_query;
QUrl url(kUrlSearch);
QStringList query_items;
// Encode the arguments
for (const Arg &arg : args) {
EncodedArg encoded_arg(QUrl::toPercentEncoding(arg.first), QUrl::toPercentEncoding(arg.second));
query_items << QString(encoded_arg.first + "=" + encoded_arg.second);
url_query.addQueryItem(encoded_arg.first, encoded_arg.second);
}
// Sign the request
const QByteArray data_to_sign = QString("GET\n%1\n%2\n%3").arg(url.host(), url.path(), query_items.join("&")).toUtf8();
const QByteArray signature(Utilities::HmacSha256(QByteArray::fromBase64(kSecretKeyB64), data_to_sign));
// Add the signature to the request
url_query.addQueryItem("Signature", QUrl::toPercentEncoding(signature.toBase64()));
url.setQuery(url_query);
QNetworkReply *reply = network_->get(QNetworkRequest(url));
NewClosure(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(SearchRequestError(QNetworkReply::NetworkError, QNetworkReply*, int)), reply, s_ctx->id);
NewClosure(reply, SIGNAL(finished()), this, SLOT(HandleSearchReply(QNetworkReply*, int)), reply, s_ctx->id);
}
void DiscogsCoverProvider::SendReleaseRequest(DiscogsCoverSearchContext *s_ctx, DiscogsCoverReleaseContext *r_ctx) {
typedef QPair<QString, QString> Arg;
typedef QList<Arg> ArgList;
typedef QPair<QByteArray, QByteArray> EncodedArg;
typedef QList<EncodedArg> EncodedArgList;
QUrlQuery url_query;
QStringList query_items;
ArgList args = ArgList()
<< Arg("key", QByteArray::fromBase64(kAccessKeyB64))
<< Arg("secret", QByteArray::fromBase64(kSecretKeyB64));
// Encode the arguments
for (const Arg &arg : args) {
EncodedArg encoded_arg(QUrl::toPercentEncoding(arg.first), QUrl::toPercentEncoding(arg.second));
query_items << QString(encoded_arg.first + "=" + encoded_arg.second);
url_query.addQueryItem(encoded_arg.first, encoded_arg.second);
}
QUrl url(r_ctx->resource_url);
// Sign the request
const QByteArray data_to_sign = QString("GET\n%1\n%2\n%3").arg(url.host(), url.path(), query_items.join("&")).toUtf8();
const QByteArray signature(Utilities::HmacSha256(QByteArray::fromBase64(kSecretKeyB64), data_to_sign));
// Add the signature to the request
url_query.addQueryItem("Signature", QUrl::toPercentEncoding(signature.toBase64()));
url.setQuery(url_query);
QNetworkReply *reply = network_->get(QNetworkRequest(url));
NewClosure(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(ReleaseRequestError(QNetworkReply::NetworkError, QNetworkReply*, int, int)), reply, s_ctx->id, r_ctx->id);
NewClosure(reply, SIGNAL(finished()), this, SLOT(HandleReleaseReply(QNetworkReply*, int, int)), reply, s_ctx->id, r_ctx->id);
}
void DiscogsCoverProvider::HandleSearchReply(QNetworkReply *reply, int s_id) {
reply->deleteLater();
if (!requests_search_.contains(s_id)) {
//qLog(Error) << "Discogs: Got reply for cancelled request: " << s_id;
return;
}
DiscogsCoverSearchContext *s_ctx = requests_search_.value(s_id);
QJsonDocument json_doc = QJsonDocument::fromJson(reply->readAll());
if ((json_doc.isNull()) || (!json_doc.isObject())) {
qLog(Error) << "Discogs: Failed to create JSON doc.";
EndSearch(s_ctx);
return;
}
QJsonObject json_obj = json_doc.object();
if (json_obj.isEmpty()) {
qLog(Error) << "Discogs: JSON object is empty.";
EndSearch(s_ctx);
return;
}
QVariantMap reply_map = json_obj.toVariantMap();
if (!reply_map.contains("results")) {
//qLog(Error) << "Discogs: Search reply from server is missing JSON results.";
//qLog(Error) << "Discogs: Map dump:";
//qLog(Error) << reply_map;
EndSearch(s_ctx);
return;
}
QVariantList results = reply_map["results"].toList();
int i = 0;
for (const QVariant &result : results) {
QVariantMap result_map = result.toMap();
if ((result_map.contains("id")) && (result_map.contains("resource_url"))) {
int r_id = result_map["id"].toInt();
QString title = result_map["title"].toString();
QString resource_url = result_map["resource_url"].toString();
if (resource_url.isEmpty()) continue;
StartRelease(s_ctx, r_id, resource_url);
i++;
}
}
if (i <= 0) EndSearch(s_ctx);
}
void DiscogsCoverProvider::HandleReleaseReply(QNetworkReply *reply, int s_id, int r_id) {
reply->deleteLater();
if (!requests_release_.contains(r_id)) {
//qLog(Error) << "Discogs: Got reply for cancelled request: " << r_id;
return;
}
DiscogsCoverReleaseContext *r_ctx = requests_release_.value(r_id);
if (!requests_search_.contains(s_id)) {
//qLog(Error) << "Discogs: Got reply for cancelled request: " << s_id << " " << r_id;
EndSearch(r_ctx);
return;
}
DiscogsCoverSearchContext *s_ctx = requests_search_.value(s_id);
QJsonDocument json_doc = QJsonDocument::fromJson(reply->readAll());
if ((json_doc.isNull()) || (!json_doc.isObject())) {
qLog(Error) << "Discogs: Failed to create JSON doc.";
EndSearch(s_ctx, r_ctx);
return;
}
QJsonObject json_obj = json_doc.object();
if (json_obj.isEmpty()) {
qLog(Error) << "Discogs: JSON object is empty.";
EndSearch(s_ctx, r_ctx);
return;
}
QVariantMap reply_map = json_obj.toVariantMap();
if (!reply_map.contains("images")) {
//qLog(Error) << "Discogs: Search reply from server is missing JSON images.";
//qLog(Error) << "Discogs: Map dump:";
//qLog(Error) << reply_map;
EndSearch(s_ctx, r_ctx);
return;
}
QVariantList results = reply_map["images"].toList();
for (const QVariant &result : results) {
QVariantMap result_map = result.toMap();
CoverSearchResult cover_result;
cover_result.description = s_ctx->title;
if (result_map.contains("type")) {
QString type = result_map["type"].toString();
if (type != "primary") continue;
}
if (result_map.contains("resource_url")) {
cover_result.image_url = QUrl(result_map["resource_url"].toString());
}
if (cover_result.image_url.isEmpty()) continue;
s_ctx->results.append(cover_result);
}
EndSearch(s_ctx, r_ctx);
}
void DiscogsCoverProvider::SearchRequestError(QNetworkReply::NetworkError error, QNetworkReply *reply, int s_id) {
if (!requests_search_.contains(s_id)) {
//qLog(Error) << "Discogs: got reply for cancelled request: " << s_id;
return;
}
DiscogsCoverSearchContext *s_ctx = requests_search_.value(s_id);
EndSearch(s_ctx);
}
void DiscogsCoverProvider::ReleaseRequestError(QNetworkReply::NetworkError error, QNetworkReply *reply, int s_id, int r_id) {
if (!requests_release_.contains(r_id)) {
//qLog(Error) << "Discogs: got reply for cancelled request: " << s_id << r_id;
return;
}
DiscogsCoverReleaseContext *r_ctx = requests_release_.value(r_id);
if (!requests_search_.contains(s_id)) {
EndSearch(r_ctx);
//qLog(Error) << "Discogs: got reply for cancelled request: " << s_id << r_id;
return;
}
DiscogsCoverSearchContext *s_ctx = requests_search_.value(s_id);
EndSearch(s_ctx, r_ctx);
}
void DiscogsCoverProvider::EndSearch(DiscogsCoverSearchContext *s_ctx, DiscogsCoverReleaseContext *r_ctx) {
delete requests_release_.take(r_ctx->id);
s_ctx->r_count--;
//qLog(Debug) << "r_count: " << s_ctx->r_count;
if (s_ctx->r_count <= 0) EndSearch(s_ctx);
}
void DiscogsCoverProvider::EndSearch(DiscogsCoverSearchContext *s_ctx) {
//qLog(Debug) << "Discogs: Finished." << s_ctx->id;
requests_search_.remove(s_ctx->id);
emit SearchFinished(s_ctx->id, s_ctx->results);
delete s_ctx;
}
void DiscogsCoverProvider::EndSearch(DiscogsCoverReleaseContext* r_ctx) {
delete requests_release_.take(r_ctx->id);
}
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