new decicion logic WIP

refit/src/modules/librefit.py

@@ -1,3 +1,6 @@
+import os
+import sys
+
 from .refit_logger import logger
 
 
@@ -99,3 +102,34 @@ def get_standard_file_name(name) -> str:
 
     logger.debug("FUNC get_standard_file_name() MSG: Exit")
     return standard_file_name
+
+
+def get_current_path(path: str) -> str:
+    """Checks if the path argument is emty and applies the current directory as working path.
+
+    This function takes an list with strings as an input. If the input is `None` the current 
+    directory is taken as the working directory.
+    If the path is passed, a check for its existence takes place.
+    
+    Args:
+        path (str): _The current working directory._
+
+    Returns:
+        str: _Returns the path of the current directory after check for existence_
+    """
+    
+    if path is None:
+        path = "."
+        logger.debug(f"FUNC: {get_current_path.__name__} MSG: Path now has the value: '{path}'")
+        return path
+    else:
+        # Here the check for the path to exist takes place
+        
+        if os.path.exists(path) is True:
+            logger.debug(f"FUNC: {get_current_path.__name__} MSG: Path '{path}' exists, continue....")
+            return path
+        else:
+            ERROR_MESSAGE = f"FUNC: {get_current_path.__name__} MSG: '{path}' is no valid path."
+            logger.error(ERROR_MESSAGE)
+            print(ERROR_MESSAGE)
+            sys.exit(1)