add getter for cache_dir_name and rename db filename getter

corrlib/tools.py

@@ -1,8 +1,7 @@
 import os
-import datalad.api as dl
 import hashlib
 from configparser import ConfigParser
-from typing import Any
+from typing import Any, Union
 
 CONFIG_FILENAME = ".corrlib"
 cached: bool = True
@@ -77,16 +76,6 @@ def k2m(k: float) -> float:
     return (1/(2*k))-4
 
 
-def get_file(path: str, file: str) -> None:
-    if file == get_db_file(path):
-        print("Downloading database...")
-    else:
-        print("Downloading data...")
-    dl.get(os.path.join(path, file), dataset=path)
-    print("> downloaded file")
-    return
-
-
 def record2name_key(record_path: str) -> tuple[str, str]:
     """
     Convert a record to a pair of name and key.
@@ -155,7 +144,7 @@ def set_config(path: str, section: str, option: str, value: Any) -> None:
     return
 
 
-def get_db_file(path: str) -> str:
+def db_filename(path: str) -> str:
     """
     Get the database file associated with the library at the given path.
 
@@ -199,3 +188,28 @@ def cache_enabled(path: str) -> bool:
     cached_str = config.get('core', 'cached', fallback='True')
     cached_bool = cached_str == ('True')
     return cached_bool
+
+
+def cache_dir_name(path: str) -> Union[str, None]:
+    """
+    Get the database file associated with the library at the given path.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+
+    Returns
+    -------
+    db_file: str
+        The file holding the database.
+    """
+    config_path = os.path.join(path, CONFIG_FILENAME)
+    config = ConfigParser()
+    if os.path.exists(config_path):
+        config.read(config_path)
+    if cache_enabled(path):
+        cache = config.get('paths', 'cache', fallback='.cache')
+    else:
+        cache = None
+    return cache