2018-03-19 15:18:56 +01:00
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/* This file is part of Clementine.
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Copyright 2012, Martin Björklund <mbj4668@gmail.com>
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Copyright 2018, Jonas Kvinge <jonas@jkvinge.net>
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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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2020-09-18 16:15:19 +02:00
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#include "discogscoverprovider.h"
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2018-03-19 15:18:56 +01:00
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#include <QByteArray>
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#include <QJsonDocument>
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#include <QJsonObject>
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#include <QList>
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#include <QNetworkReply>
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#include <QNetworkRequest>
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#include <QPair>
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#include <QString>
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#include <QStringList>
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#include <QUrlQuery>
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#include <QVariant>
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#include "core/closure.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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const char* DiscogsCoverProvider::kUrlSearch =
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"https://api.discogs.com/database/search";
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const char* DiscogsCoverProvider::kUrlReleases =
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"https://api.discogs.com/releases";
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const char* DiscogsCoverProvider::kAccessKeyB64 =
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"YVR4Yk5JTnlmUkhFY0pTaldid2c=";
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const char* DiscogsCoverProvider::kSecretKeyB64 =
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"QkJNb2tMVXVUVFhSRWRUVmZDc0ZGamZmSWRjdHZRVno=";
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DiscogsCoverProvider::DiscogsCoverProvider(QObject* parent)
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: CoverProvider("Discogs", false, parent),
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network_(new NetworkAccessManager(this)) {}
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bool DiscogsCoverProvider::StartSearch(const QString& artist,
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const QString& album, int s_id) {
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DiscogsCoverSearchContext* s_ctx = new DiscogsCoverSearchContext;
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s_ctx->id = s_id;
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s_ctx->artist = artist;
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s_ctx->album = album;
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s_ctx->r_count = 0;
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requests_search_.insert(s_id, s_ctx);
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SendSearchRequest(s_ctx);
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return true;
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}
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void DiscogsCoverProvider::CancelSearch(int id) {
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delete requests_search_.take(id);
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}
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bool DiscogsCoverProvider::StartRelease(DiscogsCoverSearchContext* s_ctx,
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int r_id, QString resource_url) {
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DiscogsCoverReleaseContext* r_ctx = new DiscogsCoverReleaseContext;
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s_ctx->r_count++;
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r_ctx->id = r_id;
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r_ctx->resource_url = resource_url;
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r_ctx->s_id = s_ctx->id;
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requests_release_.insert(r_id, r_ctx);
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SendReleaseRequest(s_ctx, r_ctx);
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return true;
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}
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void DiscogsCoverProvider::SendSearchRequest(DiscogsCoverSearchContext* s_ctx) {
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typedef QPair<QString, QString> Arg;
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typedef QList<Arg> ArgList;
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typedef QPair<QByteArray, QByteArray> EncodedArg;
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typedef QList<EncodedArg> EncodedArgList;
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ArgList args =
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ArgList() << Arg("key", QByteArray::fromBase64(kAccessKeyB64))
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<< Arg("secret", QByteArray::fromBase64(kSecretKeyB64));
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args.append(Arg("type", "release"));
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if (!s_ctx->artist.isEmpty()) {
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args.append(Arg("artist", s_ctx->artist.toLower()));
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}
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if (!s_ctx->album.isEmpty()) {
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args.append(Arg("release_title", s_ctx->album.toLower()));
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}
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QUrlQuery url_query;
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QUrl url(kUrlSearch);
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QStringList query_items;
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// Encode the arguments
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for (const Arg& arg : args) {
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EncodedArg encoded_arg(QUrl::toPercentEncoding(arg.first),
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QUrl::toPercentEncoding(arg.second));
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query_items << QString(encoded_arg.first + "=" + encoded_arg.second);
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url_query.addQueryItem(encoded_arg.first, encoded_arg.second);
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}
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// Sign the request
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const QByteArray data_to_sign =
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QString("GET\n%1\n%2\n%3")
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.arg(url.host(), url.path(), query_items.join("&"))
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.toUtf8();
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const QByteArray signature(Utilities::HmacSha256(
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QByteArray::fromBase64(kSecretKeyB64), data_to_sign));
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// Add the signature to the request
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url_query.addQueryItem("Signature",
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QUrl::toPercentEncoding(signature.toBase64()));
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url.setQuery(url_query);
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QNetworkReply* reply = network_->get(QNetworkRequest(url));
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NewClosure(reply, SIGNAL(error(QNetworkReply::NetworkError)), this,
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SLOT(SearchRequestError(QNetworkReply::NetworkError,
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QNetworkReply*, int)),
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reply, s_ctx->id);
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NewClosure(reply, SIGNAL(finished()), this,
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SLOT(HandleSearchReply(QNetworkReply*, int)), reply, s_ctx->id);
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}
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void DiscogsCoverProvider::SendReleaseRequest(
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DiscogsCoverSearchContext* s_ctx, DiscogsCoverReleaseContext* r_ctx) {
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typedef QPair<QString, QString> Arg;
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typedef QList<Arg> ArgList;
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typedef QPair<QByteArray, QByteArray> EncodedArg;
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typedef QList<EncodedArg> EncodedArgList;
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QUrlQuery url_query;
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QStringList query_items;
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ArgList args =
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ArgList() << Arg("key", QByteArray::fromBase64(kAccessKeyB64))
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<< Arg("secret", QByteArray::fromBase64(kSecretKeyB64));
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// Encode the arguments
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for (const Arg& arg : args) {
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EncodedArg encoded_arg(QUrl::toPercentEncoding(arg.first),
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QUrl::toPercentEncoding(arg.second));
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query_items << QString(encoded_arg.first + "=" + encoded_arg.second);
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url_query.addQueryItem(encoded_arg.first, encoded_arg.second);
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}
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QUrl url(r_ctx->resource_url);
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// Sign the request
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const QByteArray data_to_sign =
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QString("GET\n%1\n%2\n%3")
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.arg(url.host(), url.path(), query_items.join("&"))
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.toUtf8();
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const QByteArray signature(Utilities::HmacSha256(
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QByteArray::fromBase64(kSecretKeyB64), data_to_sign));
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// Add the signature to the request
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url_query.addQueryItem("Signature",
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QUrl::toPercentEncoding(signature.toBase64()));
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url.setQuery(url_query);
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QNetworkReply* reply = network_->get(QNetworkRequest(url));
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NewClosure(reply, SIGNAL(error(QNetworkReply::NetworkError)), this,
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SLOT(ReleaseRequestError(QNetworkReply::NetworkError,
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QNetworkReply*, int, int)),
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reply, s_ctx->id, r_ctx->id);
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NewClosure(reply, SIGNAL(finished()), this,
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SLOT(HandleReleaseReply(QNetworkReply*, int, int)), reply,
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s_ctx->id, r_ctx->id);
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}
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void DiscogsCoverProvider::HandleSearchReply(QNetworkReply* reply, int s_id) {
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reply->deleteLater();
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if (!requests_search_.contains(s_id)) return;
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DiscogsCoverSearchContext* s_ctx = requests_search_.value(s_id);
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QJsonDocument json_doc = QJsonDocument::fromJson(reply->readAll());
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if ((json_doc.isNull()) || (!json_doc.isObject())) {
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qLog(Error) << "Discogs: Failed to create JSON doc.";
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EndSearch(s_ctx);
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return;
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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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qLog(Error) << "Discogs: Failed to create JSON object.";
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EndSearch(s_ctx);
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return;
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}
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QVariantMap reply_map = json_obj.toVariantMap();
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if (!reply_map.contains("results")) {
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EndSearch(s_ctx);
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return;
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}
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QVariantList results = reply_map["results"].toList();
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int i = 0;
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for (const QVariant& result : results) {
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QVariantMap result_map = result.toMap();
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if ((result_map.contains("id")) && (result_map.contains("resource_url"))) {
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int r_id = result_map["id"].toInt();
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QString title = result_map["title"].toString();
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QString resource_url = result_map["resource_url"].toString();
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if (resource_url.isEmpty()) continue;
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StartRelease(s_ctx, r_id, resource_url);
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i++;
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}
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}
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if (i <= 0) EndSearch(s_ctx);
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}
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void DiscogsCoverProvider::HandleReleaseReply(QNetworkReply* reply, int s_id,
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int r_id) {
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reply->deleteLater();
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if (!requests_release_.contains(r_id)) return;
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DiscogsCoverReleaseContext* r_ctx = requests_release_.value(r_id);
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if (!requests_search_.contains(s_id)) {
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EndSearch(r_ctx);
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return;
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}
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DiscogsCoverSearchContext* s_ctx = requests_search_.value(s_id);
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QJsonDocument json_doc = QJsonDocument::fromJson(reply->readAll());
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if ((json_doc.isNull()) || (!json_doc.isObject())) {
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qLog(Error) << "Discogs: Failed to create JSON doc.";
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EndSearch(s_ctx, r_ctx);
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return;
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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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qLog(Error) << "Discogs: JSON object is empty.";
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EndSearch(s_ctx, r_ctx);
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return;
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}
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QVariantMap reply_map = json_obj.toVariantMap();
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if (!reply_map.contains("images")) {
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EndSearch(s_ctx, r_ctx);
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return;
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}
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QVariantList results = reply_map["images"].toList();
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for (const QVariant& result : results) {
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QVariantMap result_map = result.toMap();
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CoverSearchResult cover_result;
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cover_result.description = s_ctx->title;
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if (result_map.contains("type")) {
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QString type = result_map["type"].toString();
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if (type != "primary") continue;
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}
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if (result_map.contains("resource_url")) {
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cover_result.image_url = QUrl(result_map["resource_url"].toString());
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}
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if (cover_result.image_url.isEmpty()) continue;
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s_ctx->results.append(cover_result);
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}
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EndSearch(s_ctx, r_ctx);
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}
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void DiscogsCoverProvider::SearchRequestError(QNetworkReply::NetworkError error,
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QNetworkReply* reply, int s_id) {
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if (!requests_search_.contains(s_id)) return;
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DiscogsCoverSearchContext* s_ctx = requests_search_.value(s_id);
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EndSearch(s_ctx);
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}
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void DiscogsCoverProvider::ReleaseRequestError(
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QNetworkReply::NetworkError error, QNetworkReply* reply, int s_id,
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int r_id) {
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if (!requests_release_.contains(r_id)) return;
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DiscogsCoverReleaseContext* r_ctx = requests_release_.value(r_id);
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if (!requests_search_.contains(s_id)) {
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EndSearch(r_ctx);
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return;
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}
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DiscogsCoverSearchContext* s_ctx = requests_search_.value(s_id);
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EndSearch(s_ctx, r_ctx);
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}
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void DiscogsCoverProvider::EndSearch(DiscogsCoverSearchContext* s_ctx,
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DiscogsCoverReleaseContext* r_ctx) {
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delete requests_release_.take(r_ctx->id);
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s_ctx->r_count--;
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if (s_ctx->r_count <= 0) EndSearch(s_ctx);
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}
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void DiscogsCoverProvider::EndSearch(DiscogsCoverSearchContext* s_ctx) {
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requests_search_.remove(s_ctx->id);
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emit SearchFinished(s_ctx->id, s_ctx->results);
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delete s_ctx;
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}
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void DiscogsCoverProvider::EndSearch(DiscogsCoverReleaseContext* r_ctx) {
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delete requests_release_.take(r_ctx->id);
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}
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