refactor: flatten app/ and util/ directory structure

targets/app/common/Tutorial/TutorialMessage.cpp

@@ -0,0 +1,23 @@
+#include "TutorialMessage.h"
+
+#include "app/linux/LinuxGame.h"
+
+TutorialMessage::TutorialMessage(
+    int messageId, bool limitRepeats /*= false*/,
+    unsigned char numRepeats /*= TUTORIAL_MESSAGE_DEFAULT_SHOW*/)
+    : messageId(messageId),
+      limitRepeats(limitRepeats),
+      numRepeats(numRepeats),
+      timesShown(0) {}
+
+bool TutorialMessage::canDisplay() {
+    return !limitRepeats || (timesShown < numRepeats);
+}
+
+const wchar_t* TutorialMessage::getMessageForDisplay() {
+    if (!canDisplay()) return L"";
+
+    if (limitRepeats) ++timesShown;
+
+    return app.GetString(messageId);
+}