Separate different message delegates.

matrix/controller.cpp

@@ -51,6 +51,10 @@ void Controller::logout() {
   setIsLogin(false);
 }
 
+void Controller::uploadFile(QString filename) {
+  m_connection->uploadFile(filename);
+}
+
 void Controller::connected() {
   qDebug() << "Logged in.";
   setHomeserver(m_connection->homeserver().toString());

matrix/controller.h

@@ -32,6 +32,8 @@ class Controller : public QObject {
   Q_INVOKABLE void loginWithCredentials(QString, QString, QString);
   Q_INVOKABLE void logout();
 
+  Q_INVOKABLE void uploadFile(QString);
+
   // All the non-Q_INVOKABLE functions.
 
   // All the Q_PROPERTYs.