Add purpose plugin

Implements #182

src/sharehandler.h

@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: 2023 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#pragma once
+
+#include <QObject>
+#include <QQmlEngine>
+
+class ShareHandler : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+    QML_SINGLETON
+
+    Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged)
+    Q_PROPERTY(QString room READ room WRITE setRoom NOTIFY roomChanged)
+
+public:
+    static ShareHandler &instance()
+    {
+        static ShareHandler _instance;
+        return _instance;
+    }
+
+    static ShareHandler *create(QQmlEngine *, QJSEngine *)
+    {
+        QQmlEngine::setObjectOwnership(&instance(), QQmlEngine::CppOwnership);
+        return &instance();
+    }
+
+    QString text() const;
+    void setText(const QString &url);
+
+    QString room() const;
+    void setRoom(const QString &roomId);
+
+Q_SIGNALS:
+    void textChanged();
+    void roomChanged();
+
+private:
+    explicit ShareHandler(QObject *parent = nullptr);
+
+    QString m_text;
+    QString m_room;
+};