Send read receipts

Automatically dismiss unread notifications when the window regains
focus.

fixes #111
fixes #68

src/ChatPage.cc

@@ -125,6 +125,11 @@ ChatPage::ChatPage(QSharedPointer<MatrixClient> client, QWidget *parent)
         connect(
           room_list_, &RoomList::roomChanged, view_manager_, &TimelineViewManager::setHistoryView);
 
+        connect(view_manager_,
+                &TimelineViewManager::clearRoomMessageCount,
+                room_list_,
+                &RoomList::clearRoomMessageCount);
+
         connect(view_manager_,
                 &TimelineViewManager::unreadMessages,
                 this,

src/MatrixClient.cc

@@ -847,3 +847,31 @@ MatrixClient::removeTypingNotification(const QString &roomid)
 
         put(request, QJsonDocument(body).toJson(QJsonDocument::Compact));
 }
+
+void
+MatrixClient::readEvent(const QString &room_id, const QString &event_id)
+{
+        QUrlQuery query;
+        query.addQueryItem("access_token", token_);
+
+        QUrl endpoint(server_);
+        endpoint.setPath(clientApiUrl_ +
+                         QString("/rooms/%1/receipt/m.read/%2").arg(room_id).arg(event_id));
+        endpoint.setQuery(query);
+
+        QNetworkRequest request(QString(endpoint.toEncoded()));
+        request.setHeader(QNetworkRequest::KnownHeaders::ContentTypeHeader, "application/json");
+
+        auto reply = post(request, "{}");
+
+        connect(reply, &QNetworkReply::finished, this, [this, reply]() {
+                reply->deleteLater();
+
+                int status = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+
+                if (status == 0 || status >= 400) {
+                        qWarning() << reply->errorString();
+                        return;
+                }
+        });
+}

src/RoomList.cc

@@ -203,6 +203,18 @@ RoomList::sync(const QMap<QString, RoomState> &states,
         }
 }
 
+void
+RoomList::clearRoomMessageCount(const QString &room_id)
+{
+        if (!rooms_.contains(room_id))
+                return;
+
+        auto room = rooms_[room_id];
+        room->clearUnreadMessageCount();
+
+        calculateUnreadMessageCount();
+}
+
 void
 RoomList::highlightSelectedRoom(const QString &room_id)
 {
@@ -213,9 +225,7 @@ RoomList::highlightSelectedRoom(const QString &room_id)
                 return;
         }
 
-        // TODO: Send a read receipt for the last event.
-        auto room = rooms_[room_id];
-        room->clearUnreadMessageCount();
+        clearRoomMessageCount(room_id);
 
         calculateUnreadMessageCount();
 

src/TimelineItem.cc

@@ -154,6 +154,8 @@ TimelineItem::TimelineItem(ImageItem *image,
 {
         init();
 
+        event_id_ = event.eventId();
+
         auto timestamp   = QDateTime::fromMSecsSinceEpoch(event.timestamp());
         auto displayName = TimelineViewManager::displayName(event.sender());
 
@@ -193,6 +195,9 @@ TimelineItem::TimelineItem(const events::MessageEvent<msgs::Notice> &event,
   : QWidget(parent)
 {
         init();
+
+        event_id_ = event.eventId();
+
         descriptionMsg_ = {TimelineViewManager::displayName(event.sender()),
                            event.sender(),
                            " sent a notification",
@@ -234,6 +239,8 @@ TimelineItem::TimelineItem(const events::MessageEvent<msgs::Emote> &event,
 {
         init();
 
+        event_id_ = event.eventId();
+
         auto body        = event.content().body().trimmed();
         auto timestamp   = QDateTime::fromMSecsSinceEpoch(event.timestamp());
         auto displayName = TimelineViewManager::displayName(event.sender());
@@ -273,6 +280,8 @@ TimelineItem::TimelineItem(const events::MessageEvent<msgs::Text> &event,
 {
         init();
 
+        event_id_ = event.eventId();
+
         auto body        = event.content().body().trimmed();
         auto timestamp   = QDateTime::fromMSecsSinceEpoch(event.timestamp());
         auto displayName = TimelineViewManager::displayName(event.sender());

src/TimelineView.cc

@@ -379,6 +379,9 @@ TimelineView::addEvents(const Timeline &timeline)
         if (!timeline.events().isEmpty() && scroll_layout_->count() > 1)
                 notifyForLastEvent();
 
+        if (isActiveWindow() && isVisible() && timeline.events().size() > 0)
+                readLastEvent();
+
         return message_count;
 }
 
@@ -648,3 +651,52 @@ TimelineView::paintEvent(QPaintEvent *)
         QPainter p(this);
         style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
 }
+
+void
+TimelineView::readLastEvent() const
+{
+        const auto eventId = getLastEventId();
+
+        if (!eventId.isEmpty())
+                client_->readEvent(room_id_, eventId);
+}
+
+QString
+TimelineView::getLastEventId() const
+{
+        auto index = scroll_layout_->count();
+
+        // Search backwards for the first event that has a valid event id.
+        while (index > 0) {
+                --index;
+
+                auto lastItem          = scroll_layout_->itemAt(index);
+                auto *lastTimelineItem = qobject_cast<TimelineItem *>(lastItem->widget());
+
+                if (lastTimelineItem && !lastTimelineItem->eventId().isEmpty())
+                        return lastTimelineItem->eventId();
+        }
+
+        return QString("");
+}
+
+void
+TimelineView::showEvent(QShowEvent *event)
+{
+        readLastEvent();
+
+        QWidget::showEvent(event);
+}
+
+bool
+TimelineView::event(QEvent *event)
+{
+        if (event->type() == QEvent::WindowActivate) {
+                QTimer::singleShot(1000, this, [=]() {
+                        emit clearUnreadMessageCount(room_id_);
+                        readLastEvent();
+                });
+        }
+
+        return QWidget::event(event);
+}

src/TimelineViewManager.cc

@@ -131,6 +131,10 @@ TimelineViewManager::addRoom(const JoinedRoom &room, const QString &room_id)
                 &TimelineView::updateLastTimelineMessage,
                 this,
                 &TimelineViewManager::updateRoomsLastMessage);
+        connect(view,
+                &TimelineView::clearUnreadMessageCount,
+                this,
+                &TimelineViewManager::clearRoomMessageCount);
 
         // Add the view in the widget stack.
         addWidget(view);
@@ -147,6 +151,10 @@ TimelineViewManager::addRoom(const QString &room_id)
                 &TimelineView::updateLastTimelineMessage,
                 this,
                 &TimelineViewManager::updateRoomsLastMessage);
+        connect(view,
+                &TimelineView::clearUnreadMessageCount,
+                this,
+                &TimelineViewManager::clearRoomMessageCount);
 
         // Add the view in the widget stack.
         addWidget(view);