Introduce the ActionsHandler

src/actionshandler.h

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+// SPDX-FileCopyrightText: 2020 Carl Schwan <carlschwan@kde.org>
+//
+// SPDX-License-Identifier: GPl-3.0-or-later
+
+#include <QObject>
+
+#include "connection.h"
+#include "neochatroom.h"
+
+using namespace Quotient;
+
+/// \brief Handles user interactions with NeoChat (joining room, creating room,
+/// sending message). Account management is handled by Controller.
+class ActionsHandler : public QObject
+{
+    Q_OBJECT
+
+    /// \brief List of command definition. Usefull for buiding an autcompletion
+    /// engine or an help dialog.
+    Q_PROPERTY(QVariantList commands READ commands CONSTANT)
+
+    /// \brief The connection that will handle sending the message.
+    Q_PROPERTY(Connection *connection READ connection WRITE setConnection NOTIFY connectionChanged)
+
+    /// \brief The connection that will handle sending the message.
+    Q_PROPERTY(NeoChatRoom *room READ room WRITE setRoom NOTIFY roomChanged)
+
+public:
+    enum MessageType {
+        Info,
+        Error,
+    };
+    Q_ENUM(MessageType);
+
+    explicit ActionsHandler(QObject *parent = nullptr);
+    ~ActionsHandler();
+
+    QVariantList commands() const;
+
+    [[nodiscard]] Connection *connection() const;
+    void setConnection(Connection *connection);
+
+    [[nodiscard]] NeoChatRoom *room() const;
+    void setRoom(NeoChatRoom *room);
+
+Q_SIGNALS:
+    /// \brief Show error or information message.
+    ///
+    /// These messages will be displayed in the room view header.
+    void showMessage(MessageType messageType, QString message);
+
+    /// \brief Emmited when an action made the user join a room.
+    ///
+    /// Either when a new room was created, a direct chat was started
+    /// or a group chat was joined. The UI will react to this signal
+    /// and switch to the newly joined room.
+    void roomJoined(QString roomName);
+
+    void roomChanged();
+    void connectionChanged();
+
+public Q_SLOTS:
+    /// \brief Create new room for a group chat.
+    void createRoom(const QString &name, const QString &topic);
+
+    /// \brief Join a room.
+    void joinRoom(const QString &alias);
+
+    /// \brief Post a message.
+    ///
+    /// This also interprets commands if any.
+    void postMessage(const QString &text, const QString &attachementPath,
+        const QString &replyEventId, const QString &editEventId);
+
+private:
+    Connection *m_connection = nullptr;
+    NeoChatRoom *m_room = nullptr;
+};