yuzu: Add ui files for multiplayer rooms

src/yuzu/multiplayer/message.h

@@ -0,0 +1,65 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+
+namespace NetworkMessage {
+
+class ConnectionError {
+
+public:
+    explicit ConnectionError(std::string str) : err(std::move(str)) {}
+    const std::string& GetString() const {
+        return err;
+    }
+
+private:
+    std::string err;
+};
+
+class ErrorManager : QObject {
+    Q_OBJECT
+public:
+    /// When the nickname is considered invalid by the client
+    static const ConnectionError USERNAME_NOT_VALID;
+    static const ConnectionError ROOMNAME_NOT_VALID;
+    /// When the nickname is considered invalid by the room server
+    static const ConnectionError USERNAME_NOT_VALID_SERVER;
+    static const ConnectionError IP_ADDRESS_NOT_VALID;
+    static const ConnectionError PORT_NOT_VALID;
+    static const ConnectionError GAME_NOT_SELECTED;
+    static const ConnectionError NO_INTERNET;
+    static const ConnectionError UNABLE_TO_CONNECT;
+    static const ConnectionError ROOM_IS_FULL;
+    static const ConnectionError COULD_NOT_CREATE_ROOM;
+    static const ConnectionError HOST_BANNED;
+    static const ConnectionError WRONG_VERSION;
+    static const ConnectionError WRONG_PASSWORD;
+    static const ConnectionError GENERIC_ERROR;
+    static const ConnectionError LOST_CONNECTION;
+    static const ConnectionError HOST_KICKED;
+    static const ConnectionError MAC_COLLISION;
+    static const ConnectionError CONSOLE_ID_COLLISION;
+    static const ConnectionError PERMISSION_DENIED;
+    static const ConnectionError NO_SUCH_USER;
+    /**
+     *  Shows a standard QMessageBox with a error message
+     */
+    static void ShowError(const ConnectionError& e);
+};
+/**
+ * Show a standard QMessageBox with a warning message about leaving the room
+ * return true if the user wants to close the network connection
+ */
+bool WarnCloseRoom();
+
+/**
+ * Show a standard QMessageBox with a warning message about disconnecting from the room
+ * return true if the user wants to disconnect
+ */
+bool WarnDisconnect();
+
+} // namespace NetworkMessage