Fix creating broken direct chat for user with a direct chat already open

Just enter the existing room instead of trying to create a new one but
broken.

Fix !237


(cherry picked from commit 0dbb56ba1e)

src/controller.cpp

@@ -47,6 +47,7 @@
 #include "neochatuser.h"
 #include "settings.h"
 #include "utils.h"
+#include "roommanager.h"
 #include <KStandardShortcut>
 
 #ifndef Q_OS_ANDROID
@@ -592,6 +593,17 @@ void Controller::joinRoom(const QString &alias)
     });
 }
 
+void Controller::openOrCreateDirectChat(NeoChatUser *user)
+{
+    const auto existing = activeConnection()->directChats();
+
+    if (existing.contains(user)) {
+        RoomManager::instance().enterRoom(static_cast<NeoChatRoom *>(activeConnection()->room(existing.value(user))));
+        return;
+    }
+    activeConnection()->requestDirectChat(user);
+}
+
 QString Controller::formatByteSize(double size, int precision) const
 {
     return KFormat().formatByteSize(size, precision);