Format date (close to) the old way in qml timeline

resources/qml/TimelineView.qml

@@ -104,7 +104,7 @@ Rectangle {
 					id: dateBubble
 					anchors.horizontalCenter: parent.horizontalCenter
 					visible: section.includes(" ")
-					text: Qt.formatDate(new Date(Number(section.split(" ")[1])))
+					text: chat.model.formatDateSeparator(new Date(Number(section.split(" ")[1])))
 					height: contentHeight * 1.2
 					width: contentWidth * 1.2
 					horizontalAlignment: Text.AlignHCenter

src/timeline2/TimelineModel.cpp

 #include "TimelineModel.h"
 
+#include <QRegularExpression>
+
 #include "Logging.h"
 #include "Utils.h"
 
@@ -196,3 +198,18 @@ TimelineModel::displayName(QString id) const
 {
         return Cache::displayName(room_id_, id);
 }
+
+QString
+TimelineModel::formatDateSeparator(QDate date) const
+{
+        auto now = QDateTime::currentDateTime();
+
+        QString fmt = QLocale::system().dateFormat(QLocale::LongFormat);
+
+        if (now.date().year() == date.year()) {
+                QRegularExpression rx("[^a-zA-Z]*y+[^a-zA-Z]*");
+                fmt = fmt.remove(rx);
+        }
+
+        return date.toString(fmt);
+}

src/timeline2/TimelineModel.h

@@ -2,6 +2,7 @@
 
 #include <QAbstractListModel>
 #include <QColor>
+#include <QDate>
 #include <QHash>
 
 #include <mtx/responses.hpp>
@@ -30,6 +31,7 @@ public:
 
         Q_INVOKABLE QColor userColor(QString id, QColor background);
         Q_INVOKABLE QString displayName(QString id) const;
+        Q_INVOKABLE QString formatDateSeparator(QDate date) const;
 
         void addEvents(const mtx::responses::Timeline &events);