From e4809345fac8a6a64dd3af5cd394afee891bb263 Mon Sep 17 00:00:00 2001
From: Robin Jones <networkfusion@users.noreply.github.com>
Date: Thu, 23 Feb 2023 02:59:54 +0000
Subject: [PATCH] use fatfs for dir listing

---
 src/menu/menu.c | 52 +++++++++++++++++++++++++++++++++++--------------
 1 file changed, 37 insertions(+), 15 deletions(-)

diff --git a/src/menu/menu.c b/src/menu/menu.c
index adbc065d..4b172293 100644
--- a/src/menu/menu.c
+++ b/src/menu/menu.c
@@ -4,6 +4,7 @@
 #include <unistd.h>
 
 #include <libdragon.h>
+#include <fatfs/ff.h>
 
 #include "flashcart/flashcart.h"
 #include "libs/toml/toml.h"
@@ -103,6 +104,37 @@ void menu_restore (menu_t *menu) {
     // TODO: restore last menu state from SD card
 }
 
+FRESULT scan_files (
+    char* path        /* Start node to be scanned (***also used as work area***) */
+)
+{
+    FRESULT res;
+    DIR dir;
+    UINT i;
+    static FILINFO fno;
+
+
+    res = f_opendir(&dir, path);                       /* Open the directory */
+    if (res == FR_OK) {
+        for (;;) {
+            res = f_readdir(&dir, &fno);                   /* Read a directory item */
+            if (res != FR_OK || fno.fname[0] == 0) break;  /* Break on error or end of dir */
+            if (fno.fattrib & AM_DIR) {                    /* It is a directory */
+                i = strlen(path);
+                sprintf(&path[i], "/%s", fno.fname);
+                res = scan_files(path);                    /* Enter the directory */
+                if (res != FR_OK) break;
+                path[i] = 0;
+            } else {                                       /* It is a file. */
+                printf("%s/%s\n", path, fno.fname);
+            }
+        }
+        f_closedir(&dir);
+    }
+
+    return res;
+}
+
 void menu_run (menu_t *menu) {
     // TODO: implement nice user interface here
 
@@ -122,21 +154,11 @@ void menu_run (menu_t *menu) {
     else {
         printf("N64 Flashcart Menu\n\n");
         printf("File list:\n");
-        DIR *dp;
-        struct dirent *ep;     
-        dp = opendir ("sd://");
-        if (dp != NULL)
-        {
-            while ((ep = readdir (dp)) != NULL)
-            puts (ep->d_name);
-                
-            (void) closedir (dp);
-            return 0;
-        }
-        else
-        {
-            printf("Couldn't open the directory");
-        }
+        FRESULT res;
+        char buff[256];
+        strcpy(buff, "/");
+        res = scan_files(buff);
+    
         // TODO: wait for a key input
     }
     // TODO: write menu state to SD card