Add version checking and don't let it crash, if no files are found.

include/gui.hpp

@@ -68,6 +68,8 @@ namespace Gui
 	// Basic GUI.
 	void DrawTop(void);
 	void DrawBottom(void);
+
+	void DisplayWarnMsg(std::string Text);
 }
 
 void DisplayMsg(std::string text);

romfs/lang/en/app.json

@@ -24,5 +24,8 @@
 
 	"ENTER_RED_RGB":					"Enter the Red RGB.",
 	"ENTER_GREEN_RGB":					"Enter the Green RGB.",
-	"ENTER_BLUE_RGB":					"Enter the Blue RGB."
+	"ENTER_BLUE_RGB":					"Enter the Blue RGB.",
+
+	"WHAT_DO_YOU_TRY":					"What are you trying to do? :P",
+	"INCOMPATIBLE_SCRIPT":				"You have an incompatible script."
 }

source/gui.cpp

@@ -81,6 +81,21 @@ void DisplayMsg(std::string text) {
 	C3D_FrameEnd(0);
 }
 
+void Gui::DisplayWarnMsg(std::string Text)
+{
+	Gui::clearTextBufs();
+	C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
+	C2D_TargetClear(top, BLACK);
+	C2D_TargetClear(bottom, BLACK);
+	Gui::DrawTop();
+	Gui::DrawStringCentered(0, 2, 0.6f, Config::TxtColor, Text.c_str(), 400);
+	Gui::DrawBottom();
+	C3D_FrameEnd(0);
+	for (int i = 0; i < 60*3; i++) {
+		gspWaitForVBlank();
+	}
+}
+
 void Gui::DrawStringCentered(float x, float y, float size, u32 color, std::string Text, int maxWidth) {
 	Gui::DrawString((currentScreen ? 200 : 160)+x-(std::min(maxWidth, (int)Gui::GetStringWidth(size, Text))/2), y, size, color, Text, maxWidth);
 }

source/screens/scriptlist.cpp

@@ -62,6 +62,19 @@ Info parseInfo(std::string fileName) {
 	return info;
 }
 
+void checkForValidate(void) {
+	FILE* file = fopen(currentFile.c_str(), "rt");
+	nlohmann::json json = nlohmann::json::parse(file, nullptr, false);
+	fclose(file);
+
+	std::string version;
+	version = get(json, "info", "version");
+	if (version != "1") {
+		Gui::DisplayWarnMsg(Lang::get("INCOMPATIBLE_SCRIPT"));
+	}
+}
+
+
 // Objects like Release or Nightly.
 std::vector<std::string> parseObjects(std::string fileName) {
 	FILE* file = fopen(fileName.c_str(), "rt");
@@ -235,11 +248,16 @@ void ScriptList::ListSelection(u32 hDown, u32 hHeld) {
 	}
 
 	if (hDown & KEY_A) {
+		if (fileInfo.size() == 0) {
+			Gui::DisplayWarnMsg(Lang::get("WHAT_DO_YOU_TRY"));
+		} else {
 			currentFile = dirContents[selection].name;
+			checkForValidate();
 			fileInfo2 = parseObjects(currentFile);
 			selection = 0;
 			mode = 1;
 		}
+	}
 
 	if(selection < screenPos) {
 		screenPos = selection;
@@ -275,9 +293,13 @@ void ScriptList::SelectFunction(u32 hDown, u32 hHeld) {
 		}
 	}
 	if (hDown & KEY_A) {
+		if (fileInfo2.size() == 0) {
+			Gui::DisplayWarnMsg(Lang::get("WHAT_DO_YOU_TRY"));
+		} else {
 			choice = fileInfo2[selection2];
 			runFunctions();
 		}
+	}
 
 	if (hDown & KEY_B) {
 		selection2 = 0;