Warrior_EA/Database/DatabaseFileSystemManager.mqh

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CDatabaseFileSystemManager
  {
private:
   //--- FolderCreate/FolderClean/FileDelete all shared the same 5-attempt/1s-sleep retry shape,
   //--- differing only in which op ran and the noun in the log line. One loop, dispatched by an
   //--- enum rather than a function pointer (MQL5 function pointers cannot bind a built-in call
   //--- with default parameters with any more certainty than a compile can confirm - not worth the
   //--- risk for 3 one-line bodies).
   enum ENUM_FS_RETRY_OP
     {
      FS_RETRY_CREATE_DIR,
      FS_RETRY_CLEAN_DIR,
      FS_RETRY_DELETE_FILE
     };

   bool              RetryFileSystemOp(ENUM_FS_RETRY_OP op, string target, string verb, string caller)
     {
      int attempts = 0;
      while(attempts < 5)
        {
         bool ok = false;
         switch(op)
           {
            case FS_RETRY_CREATE_DIR:
               ok = FolderCreate(target, FILE_COMMON);
               break;
            case FS_RETRY_CLEAN_DIR:
               ok = FolderClean(target, FILE_COMMON);
               break;
            case FS_RETRY_DELETE_FILE:
               ok = FileDelete(target, FILE_COMMON);
               break;
           }
         if(ok)
            return true;
         Print(caller + ": Retry " + IntegerToString(attempts + 1) + " failed to " + verb + ": " + target);
         Sleep(1000); // Wait for a second before retrying
         attempts++;
        }
      Print(caller + ": Failed to " + verb + " after retries: " + target);
      return false;
     }

public:
   bool              CreateDirectory(string folderName)
     {
      return RetryFileSystemOp(FS_RETRY_CREATE_DIR, folderName, "create directory", __FUNCTION__);
     }

   bool              CleanDirectory(string folderName)
     {
      return RetryFileSystemOp(FS_RETRY_CLEAN_DIR, folderName, "clean folder", __FUNCTION__);
     }

   bool              DeleteFile(string fileName)
     {
      return RetryFileSystemOp(FS_RETRY_DELETE_FILE, fileName, "delete file", __FUNCTION__);
     }
  };
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