Comletely redo emoticon handling

src/models/imagepackroomsmodel.h

@@ -0,0 +1,42 @@
+// SPDX-FileCopyrightText: 2023 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "imagecontentmanager.h"
+#include <QAbstractListModel>
+
+/**
+ * Lists the custom emoji/sticker packs from other rooms as marked in the account data.
+ * Not to be confused with the packs for this room (-> RoomEmoticonsCategoryModel)
+ *
+ * Note: This model uses the ImagePackRoles from ImageContentManager as roles.
+ */
+class ImagePackRoomsModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit ImagePackRoomsModel(QObject *parent = nullptr);
+
+    /**
+     * @brief Get the given role value at the given index.
+     *
+     * @sa QAbstractItemModel::data
+     */
+    [[nodiscard]] QVariant data(const QModelIndex &index, int role) const override;
+
+    /**
+     * @brief Number of rows in the model.
+     *
+     * @sa QAbstractItemModel::rowCount
+     */
+    [[nodiscard]] int rowCount(const QModelIndex &index) const override;
+
+    /**
+     * @brief Returns a mapping from Role enum values to role names.
+     *
+     * @sa Roles, QAbstractItemModel::roleNames()
+     */
+    [[nodiscard]] QHash<int, QByteArray> roleNames() const override;
+};