created librefit for general functions

refit/src/modules/librefit.py

@@ -0,0 +1,35 @@
+from .refit_logger import logger
+
+
+def get_standard_name_number(current_number, number_str_length):
+    """returns a number string filled to the length of the input number"""
+    current_number = str(current_number)
+    standard_name_number = str.zfill(current_number, number_str_length)
+    # logger.debug(f"standard_name_number={standard_name_number}")
+    return standard_name_number
+
+
+def get_standard_folder_name(name):
+    """returns the default name if name=None else, it returns the first
+    given name to the argument --name as astring"""
+    logger.debug("get_standard_folder_name() call")
+    if name is None:
+        logger.warning("No name assigned, continue with default.")
+        standard_folder_name = "directory"
+    else:
+        logger.debug(f"{name}, Type: {type(name)}, Length: {len(name)}")
+
+        # Checks if multiple names are passed to the --name argument
+        # if so, only the first one gets used.
+        if len(name) > 1:
+            _NAMES_WARNING = f"{len(name)} names given, only one required.\nContinuing with '{name[0]}' as name."
+            logger.warning(_NAMES_WARNING)
+            print(_NAMES_WARNING)
+            standard_folder_name = name[0]
+
+            logger.debug(f"{standard_folder_name}, Type: {type(standard_folder_name)}")
+        else:
+            standard_folder_name = name[0]
+            logger.debug("Continuing with expected input")
+
+    return standard_folder_name