Adapt to power level changes in room version 12

src/libneochat/models/userlistmodel.cpp

@@ -100,6 +100,10 @@ QVariant UserListModel::data(const QModelIndex &index, int role) const
         return plEvent->powerLevelForUser(memberId);
     }
     if (role == PowerLevelStringRole) {
+        if (m_currentRoom->roomCreatorHasUltimatePowerLevel() && m_currentRoom->isCreator(memberId)) {
+            return i18nc("@info the person that created this room", "Creator");
+        }
+
         auto pl = m_currentRoom->currentState().get<RoomPowerLevelsEvent>();
         // User might not in the room yet, in this case pl can be nullptr.
         // e.g. When invited but user not accepted or denied the invitation.

src/libneochat/neochatroom.cpp

@@ -536,6 +536,9 @@ bool NeoChatRoom::containsUser(const QString &userID) const
 
 bool NeoChatRoom::canSendEvent(const QString &eventType) const
 {
+    if (roomCreatorHasUltimatePowerLevel() && isCreator(localMember().id())) {
+        return true;
+    }
     auto plEvent = currentState().get<RoomPowerLevelsEvent>();
     if (!plEvent) {
         return false;
@@ -548,6 +551,9 @@ bool NeoChatRoom::canSendEvent(const QString &eventType) const
 
 bool NeoChatRoom::canSendState(const QString &eventType) const
 {
+    if (roomCreatorHasUltimatePowerLevel() && isCreator(localMember().id())) {
+        return true;
+    }
     auto plEvent = currentState().get<RoomPowerLevelsEvent>();
     if (!plEvent) {
         return false;
@@ -1741,4 +1747,20 @@ void NeoChatRoom::setHiddenFilter(std::function<bool(const Quotient::RoomEvent *
     NeoChatRoom::m_hiddenFilter = hiddenFilter;
 }
 
+bool NeoChatRoom::roomCreatorHasUltimatePowerLevel() const
+{
+    bool ok = false;
+    auto version = this->version().toInt(&ok);
+    // This is terrible. For non-numeric room versions, I don't think there's a way of knowing whether they're pre- or post hydra.
+    // We just assume they are. Shouldn't matter for normal users anyway.
+    return !ok || version > 11;
+}
+
+bool NeoChatRoom::isCreator(const QString &userId) const
+{
+    auto createEvent = currentState().get<RoomCreateEvent>();
+    return roomCreatorHasUltimatePowerLevel() && createEvent
+        && (createEvent->senderId() == userId || createEvent->contentPart<QStringList>(u"additional_creators"_s).contains(userId));
+}
+
 #include "moc_neochatroom.cpp"

src/libneochat/neochatroom.h

@@ -589,6 +589,18 @@ public:
 
     static void setHiddenFilter(std::function<bool(const Quotient::RoomEvent *)> hiddenFilter);
 
+    /**
+     * @brief Whether this room has a room version where the creator is treated as having an ultimate power level
+     *
+     * For unusual room versions, this information might be wrong.
+     */
+    bool roomCreatorHasUltimatePowerLevel() const;
+
+    /**
+     * @brief Whether this user is considered a creator of this room. Only applies to post-v12 rooms.
+     */
+    bool isCreator(const QString &userId) const;
+
 private:
     bool m_visible = false;