#include "FS.h"
#include "SPIFFS.h"

#define FORMAT_SPIFFS_IF_FAILED false

void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
   Serial.printf("Listing directory: %s\r\n", dirname);

   File root = fs.open(dirname);
   if(!root){
      Serial.println("− failed to open directory");
      return;
   }
   if(!root.isDirectory()){
      Serial.println(" − not a directory");
      return;
   }

   File file = root.openNextFile();
   while(file){
      if(file.isDirectory()){
         Serial.print("  DIR : ");
         Serial.println(file.name());
         if(levels){
            listDir(fs, file.name(), levels -1);
         }
      } else {
         Serial.print("  FILE: ");
         Serial.print(file.name());
         Serial.print("\tSIZE: ");
         Serial.println(file.size());
      }
      file = root.openNextFile();
   }
}

void setup() {
   Serial.begin(115200);
   if(!SPIFFS.begin(FORMAT_SPIFFS_IF_FAILED)){
      Serial.println("SPIFFS Mount Failed");
      return;
   }
   listDir(SPIFFS, "/", 0);

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}