add remote cheats launcher

src/launcher/include/cheatRepository.h

@@ -0,0 +1,66 @@
+#ifndef CHEAT_REPOSITORY_H
+#define CHEAT_REPOSITORY_H
+
+#include <QByteArray>
+#include <QList>
+#include <QNetworkAccessManager>
+#include <QObject>
+#include <QPointer>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+
+#include <functional>
+
+class QNetworkReply;
+
+namespace Cheats {
+
+struct RemoteFile {
+	QString name;
+	QString title;
+	QString version;
+	QString format;
+
+	[[nodiscard]] bool IsSupported() const;
+	[[nodiscard]] QUrl Url() const;
+};
+
+struct CatalogResult {
+	QList<RemoteFile> files;
+	QString           error;
+};
+
+[[nodiscard]] CatalogResult ParseIndex(const QByteArray& data, const QString& format,
+                                       const QString& title_id);
+
+class CheatRepository final: public QObject {
+	Q_OBJECT
+
+public:
+	explicit CheatRepository(QObject* parent = nullptr);
+	void Load(const QString& title_id);
+	void Fetch(const RemoteFile& file);
+	void CancelFetch();
+
+signals:
+	void CatalogLoaded(QList<Cheats::RemoteFile> files, QString error);
+	void FileLoaded(QByteArray data, QString error);
+
+private:
+	QNetworkReply* Request(const QUrl& url, qint64 limit,
+	                       std::function<void(QByteArray, QString)> complete);
+
+	QNetworkAccessManager   m_network;
+	QList<QNetworkReply*>   m_catalog_replies;
+	QPointer<QNetworkReply> m_file_reply;
+	QList<RemoteFile>       m_files;
+	QStringList             m_errors;
+	int                     m_catalog_generation = 0;
+	int                     m_fetch_generation   = 0;
+	int                     m_pending            = 0;
+};
+
+} // namespace Cheats
+
+#endif // CHEAT_REPOSITORY_H