Adding UserServices backend

KomplexHubPlugin/common/userservices.h

@@ -0,0 +1,69 @@
+#pragma once
+
+#include <QGuiApplication>
+#include <QObject>
+#include <QDateTime>
+#include <QSharedPointer>
+#include <QFuture>
+#include <QJsonDocument>
+#include <QJsonArray>
+#include <QJsonObject>
+#include "komplex_global.h"
+#include "qwallet.h"
+
+struct UserCredentials
+{
+    QByteArray username;
+    QByteArray sessionToken;
+    QDateTime expiry;
+
+    UserCredentials &operator = (const UserCredentials &other)
+    {
+        username = other.username;
+        sessionToken = other.sessionToken;
+        expiry = other.expiry;
+
+        return *this;
+    }
+
+    bool isValid()
+    {
+        return !username.isEmpty() && username.isValidUtf8() &&
+               !sessionToken.isEmpty() && sessionToken.isValidUtf8();
+    }
+};
+
+class KOMPLEX_EXPORT UserServices : public QObject
+{
+    Q_OBJECT
+
+public:
+    auto instance() const -> QWeakPointer<UserServices>;
+    static auto userCredentials() -> const UserCredentials &;
+    auto login(const QString &username, const QByteArray &password) -> QFuture<UserCredentials>;
+
+    auto errorString() const -> const QString &;
+
+signals:
+    auto loginComplete() -> void;
+    auto loginFailed() -> void;
+    auto userCredentialsChanged() -> void;
+
+    auto errorStringChanged() -> void;
+
+private:
+    inline static UserServices *s_instance = nullptr;
+    inline static QSharedPointer<UserServices> s_pointer;
+
+    explicit UserServices(QObject *parent);
+    ~UserServices();
+
+    auto setUserCredentials(const UserCredentials &credentials) -> void;
+    auto setErrorString(const QString &errorString) -> void;
+
+    QWallet *m_wallet = nullptr;
+    QString m_errorString;
+    inline static UserCredentials s_userCredentials;
+    Q_PROPERTY(UserCredentials userCredentials READ userCredentials NOTIFY userCredentialsChanged FINAL)
+    Q_PROPERTY(QString errorString READ errorString WRITE setErrorString NOTIFY errorStringChanged FINAL)
+};