Move showAuthor role to MessageModel, so it's available for all models

This fixes features like the search model, where no message delegates
could be created because it's missing showAuthor.

src/models/messagefiltermodel.cpp

@@ -92,7 +92,7 @@ QVariant MessageFilterModel::data(const QModelIndex &index, int role) const
         return authorList(mapToSource(index).row());
     } else if (role == ExcessAuthorsRole) {
         return excessAuthors(mapToSource(index).row());
-    } else if (role == ShowAuthorRole) {
+    } else if (role == MessageModel::ShowAuthorRole) {
         return showAuthor(index);
     }
     return QSortFilterProxyModel::data(index, role);
@@ -105,7 +105,6 @@ QHash<int, QByteArray> MessageFilterModel::roleNames() const
     roles[StateEventsRole] = "stateEvents";
     roles[AuthorListRole] = "authorList";
     roles[ExcessAuthorsRole] = "excessAuthors";
-    roles[ShowAuthorRole] = "showAuthor";
     return roles;
 }
 

src/models/messagefiltermodel.h

@@ -34,7 +34,6 @@ public:
         StateEventsRole, /**< List of state events in the aggregated state. */
         AuthorListRole, /**< List of the first 5 unique authors of the aggregated state event. */
         ExcessAuthorsRole, /**< The number of unique authors beyond the first 5. */
-        ShowAuthorRole, /**< Whether the author of a message should be shown. */
         LastRole, // Keep this last
     };
 

src/models/messagemodel.cpp

@@ -300,6 +300,10 @@ QVariant MessageModel::data(const QModelIndex &idx, int role) const
             && event.value().get().senderId() == m_room->localMember().id();
     }
 
+    if (role == ShowAuthorRole) {
+        return true;
+    }
+
     return {};
 }
 
@@ -329,6 +333,7 @@ QHash<int, QByteArray> MessageModel::roleNames() const
     roles[ContentModelRole] = "contentModel";
     roles[MediaInfoRole] = "mediaInfo";
     roles[IsEditableRole] = "isEditable";
+    roles[ShowAuthorRole] = "showAuthor";
     return roles;
 }
 

src/models/messagemodel.h

@@ -84,6 +84,7 @@ public:
         IsRedactedRole, /**< Whether an event has been deleted. */
         IsPendingRole, /**< Whether an event is waiting to be accepted by the server. */
         IsEditableRole, /**< Whether the event can be edited by the user. */
+        ShowAuthorRole, /**< Whether the author of a message should be shown. */
         LastRole, // Keep this last
     };
     Q_ENUM(EventRoles)