From 63558ee3f99908720a16bf229a711f7a075313ad Mon Sep 17 00:00:00 2001
From: cooolgamer <64099608+cooolgamer@users.noreply.github.com>
Date: Sat, 23 Mar 2024 12:35:50 +0100
Subject: [PATCH] Add a special message for Kor if hm patch isn't installed

---
 include/fs.h  |  2 ++
 source/fs.c   | 11 +++++++++++
 source/main.c | 12 ++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/include/fs.h b/include/fs.h
index d140e17..a304a93 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -48,4 +48,6 @@ Result buf_to_file(u32 size, FS_Path path, FS_Archive archive, char *buf);
 void remake_file(FS_Path path, FS_Archive archive, u32 size);
 void save_zip_to_sd(char * filename, u32 size, char * buf, EntryMode mode);
 
+Result korPatchInstalled(Result archive_result);
+
 #endif
diff --git a/source/fs.c b/source/fs.c
index 55fba5b..2519882 100644
--- a/source/fs.c
+++ b/source/fs.c
@@ -468,3 +468,14 @@ void save_zip_to_sd(char * filename, u32 size, char * buf, EntryMode mode)
     remake_file(path, ArchiveSD, size);
     buf_to_file(size, path, ArchiveSD, buf);
 }
+
+Result korPatchInstalled(Result archive_result){
+    Handle handle;
+    Result res = 0;
+    if (R_FAILED(res = FSUSER_OpenFile(&handle, ArchiveSD, fsMakePath(PATH_ASCII, "/luma/titles/000400300000A902/code.ips"), FS_OPEN_READ, 0))) return res;
+    FSFILE_Close(handle);
+    // The following file is needed to get the "change theme" button on the Home Menu allowing to create extdata, not needed if extdata is already created
+    if (R_FAILED(archive_result) && R_FAILED(res = FSUSER_OpenFile(&handle, ArchiveSD, fsMakePath(PATH_ASCII, "/luma/titles/000400300000A902/romfs/petit_LZ.bin"), FS_OPEN_READ, 0))) return res;
+    FSFILE_Close(handle);
+    return 0;
+}
diff --git a/source/main.c b/source/main.c
index 91426fc..43f742c 100644
--- a/source/main.c
+++ b/source/main.c
@@ -362,6 +362,12 @@ int main(void)
     load_lists(lists);
     #endif
 
+    u8 regionCode;
+    Result korCheck = 0;
+    CFGU_SecureInfoGetRegion(&regionCode);
+    if(regionCode == 5)
+        korCheck = korPatchInstalled(archive_result);
+
     EntryMode current_mode = MODE_THEMES;
 
     bool preview_mode = false;
@@ -380,6 +386,12 @@ int main(void)
             return 0;
         }
 
+        if (R_FAILED(korCheck) && current_mode == MODE_THEMES){
+            throw_error("Korean HOME Menu patch not found.\nYou must install it in order\nto use themes.", ERROR_LEVEL_ERROR);
+            quit = true;
+            continue;
+        }
+
         #ifndef CITRA_MODE
         if(R_FAILED(archive_result) && current_mode == MODE_THEMES)
         {