Move NeoChatConnection and NeoChatRoom to LibNeoChat

Move `NeoChatConnection` and `NeoChatRoom` to `LibNeoChat` along with any required dependencies.

src/libneochat/clipboard.h

@@ -0,0 +1,76 @@
+// SPDX-FileCopyrightText: 2019 Black Hat <bhat@encom.eu.org>
+// SPDX-License-Identifier: GPL-3.0-only
+
+#pragma once
+
+#include <QObject>
+#include <QQmlEngine>
+
+class QClipboard;
+class QImage;
+
+/**
+ * @class Clipboard
+ *
+ * Clipboard proxy
+ *
+ * Used to set and retrieve content from the clipboard.
+ */
+class Clipboard : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+    QML_SINGLETON
+
+    /**
+     * @brief Whether the current clipboard content is an image.
+     */
+    Q_PROPERTY(bool hasImage READ hasImage NOTIFY imageChanged)
+
+    /**
+     * @brief Return the current clipboard content image.
+     *
+     * Returns a null image if the clipboard does not contain an image or if it
+     * contains an image in an unsupported image format.
+     */
+    Q_PROPERTY(QImage image READ image NOTIFY imageChanged)
+
+public:
+    explicit Clipboard(QObject *parent = nullptr);
+
+    [[nodiscard]] bool hasImage() const;
+
+    [[nodiscard]] QImage image() const;
+
+    /**
+     * @brief Save the current clipboard image to file.
+     *
+     * If the clipboard does not contain an image or if it contains an image in an
+     * unsupported image format nothing happens.
+     *
+     * The given file path must be both valid and local or nothing happens.
+     *
+     * @param localPath the path to save the image. A default path for the app cache
+     *                  will be used if available and this is empty.
+     *
+     * @return A QString with the path that the image was saved to. The string will
+     *         be empty if nothing was saved.
+     */
+    Q_INVOKABLE QString saveImage(QString localPath = {}) const;
+
+    /**
+     * @brief Set the clipboard content to the input message.
+     */
+    Q_INVOKABLE void saveText(QString message);
+
+    /**
+     * @brief Set the clipboard content to the input image.
+     */
+    Q_INVOKABLE void setImage(const QUrl &image);
+
+private:
+    QClipboard *m_clipboard;
+
+Q_SIGNALS:
+    void imageChanged();
+};