Reaction Model

Create a reaction model that provides all the required data for `ReactionDelegate` so that none need to be calculated in QML.

This also cleans up the API for `ReactionDelegate`

src/models/reactionmodel.cpp

@@ -0,0 +1,110 @@
+// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#include "reactionmodel.h"
+
+#include <QDebug>
+
+#include <KLocalizedString>
+
+#include "neochatuser.h"
+
+ReactionModel::ReactionModel(QObject *parent, QList<Reaction> reactions, NeoChatUser *localUser)
+    : QAbstractListModel(parent)
+    , m_localUser(localUser)
+{
+    setReactions(reactions);
+}
+
+QVariant ReactionModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid()) {
+        return {};
+    }
+
+    if (index.row() >= rowCount()) {
+        qDebug() << "ReactionModel, something's wrong: index.row() >= rowCount()";
+        return {};
+    }
+
+    const auto &reaction = m_reactions.at(index.row());
+
+    if (role == TextRole) {
+        if (reaction.authors.count() > 1) {
+            return reaction.reaction + QStringLiteral("  %1").arg(reaction.authors.count());
+        } else {
+            return reaction.reaction;
+        }
+    }
+
+    if (role == ReactionRole) {
+        return reaction.reaction;
+    }
+
+    if (role == ToolTipRole) {
+        QString text;
+
+        for (int i = 0; i < reaction.authors.count() && i < 3; i++) {
+            if (i != 0) {
+                if (i < reaction.authors.count() - 1) {
+                    text += QStringLiteral(", ");
+                } else {
+                    text += i18nc("Separate the usernames of users", " and ");
+                }
+            }
+            text += reaction.authors.at(i).toMap()["displayName"].toString();
+        }
+
+        if (reaction.authors.count() > 3) {
+            text += i18ncp("%1 is the number of other users", " and %1 other", " and %1 others", reaction.authors.count() - 3);
+        }
+
+        text = i18ncp("%2 is the users who reacted and %3 the emoji that was given",
+                      "%2 reacted with %3",
+                      "%2 reacted with %3",
+                      reaction.authors.count(),
+                      text,
+                      reaction.reaction);
+        return text;
+    }
+
+    if (role == AuthorsRole) {
+        return reaction.authors;
+    }
+
+    if (role == HasLocalUser) {
+        for (auto author : reaction.authors) {
+            if (author.toMap()["id"] == m_localUser->id()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    return {};
+}
+
+int ReactionModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return m_reactions.count();
+}
+
+void ReactionModel::setReactions(QList<Reaction> reactions)
+{
+    beginResetModel();
+    m_reactions.clear();
+    m_reactions = reactions;
+    endResetModel();
+}
+
+QHash<int, QByteArray> ReactionModel::roleNames() const
+{
+    return {
+        {TextRole, "text"},
+        {ReactionRole, "reaction"},
+        {ToolTipRole, "toolTip"},
+        {AuthorsRole, "authors"},
+        {HasLocalUser, "hasLocalUser"},
+    };
+}