Timeline Memory Test App

Create a simple app that puts a number of events into a simple timeline which can be used to verify future memory optimisations

When Neochat is built with tests on you should find the app at ~/kde/usr/bin/timeline-memtest assuming ~/kde is your kdesrc-build directory

memorytests/memtesttimelinemodel.h

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: 2024 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include <QAbstractListModel>
+#include <QQmlEngine>
+
+#include <Quotient/events/roomevent.h>
+#include <Quotient/syncdata.h>
+
+#include "models/messagemodel.h"
+
+namespace Quotient
+{
+class Connection;
+}
+
+class NeoChatRoom;
+
+class MemTestRoom : public NeoChatRoom
+{
+public:
+    MemTestRoom(Quotient::Connection *connection, const QString &roomName, const QString &syncFileName = {})
+        : NeoChatRoom(connection, roomName, Quotient::JoinState::Join)
+    {
+        syncNewEvents(syncFileName);
+    }
+
+    void update(Quotient::SyncRoomData &&data, bool fromCache = false)
+    {
+        Room::updateData(std::move(data), fromCache);
+    }
+
+    void syncNewEvents(const QString &syncFileName)
+    {
+        if (!syncFileName.isEmpty()) {
+            QFile testSyncFile;
+            testSyncFile.setFileName(QStringLiteral(DATA_DIR) + u'/' + syncFileName);
+            testSyncFile.open(QIODevice::ReadOnly);
+            auto testSyncJson = QJsonDocument::fromJson(testSyncFile.readAll()).object();
+            Quotient::SyncRoomData roomData(id(), Quotient::JoinState::Join, testSyncJson);
+            update(std::move(roomData));
+        }
+    }
+};
+
+/**
+ * @class MemTestTimelineModel
+ *
+ * This is a special version of the MessageModel design to load an unchanging set
+ * of events from a json file so that timeline memory optimisations can be measured.
+ */
+class MemTestTimelineModel : public MessageModel
+{
+    Q_OBJECT
+    QML_ELEMENT
+
+public:
+    explicit MemTestTimelineModel(QObject *parent = nullptr);
+
+    /**
+     * @brief Number of rows in the model.
+     *
+     * @sa QAbstractItemModel::rowCount
+     */
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+
+private:
+    QPointer<Quotient::Connection> m_connection;
+
+    std::vector<Quotient::RoomEventPtr> m_events;
+
+    std::optional<std::reference_wrapper<const Quotient::RoomEvent>> getEventForIndex(QModelIndex index) const override;
+};