Making const values actually constant.

Signed-off-by: Cliff Hill <xlorep@darkhelm.org>

src/playlist/data/const.py

@@ -2,25 +2,42 @@
 import concurrent.futures
 import dataclasses
 import datetime
-import enum
 import pathlib
 
 import appdirs  # type: ignore
 
-__all__ = ["APPNAME", "APPAUTHOR", "PATHS"]
+
+@dataclasses.dataclass(frozen=True)
+class _Defaults:
+    BATCH_SIZE: int
+    PROCESS_DELAY: int
+    DURATION: int
+    PLAYTIME: datetime.timedelta
+    MAX_TRACKS: int
+
+
+@dataclasses.dataclass(frozen=True)
+class _Paths:
+    CONFIG: pathlib.Path
+    DATA: pathlib.Path
+    CACHE: pathlib.Path
+    LOG: pathlib.Path
+
 
 APPNAME = "plex-playlist"
 APPAUTHOR = "Cliff Hill"
 
 
-class Default(enum.Enum):
-    """Contains default values used for initializing settings."""
+_dirs = appdirs.AppDirs(APPNAME, APPAUTHOR)
 
-    BATCH_SIZE: int = 1000
-    PROCESS_DELAY: int = 0
-    DURATION: int = 0
-    PLAYTIME: datetime.timedelta = datetime.timedelta(days=1)
-    MAX_TRACKS: int = 0
+
+DEFAULTS = _Defaults(
+    BATCH_SIZE=1000,
+    PROCESS_DELAY=0,
+    DURATION=0,
+    PLAYTIME=datetime.timedelta(days=1),
+    MAX_TRACKS=0,
+)
 
 
 PROCESS_POOL = concurrent.futures.ProcessPoolExecutor()
@@ -28,19 +45,9 @@ MAX_PROCESSES = PROCESS_POOL._max_workers  # type: ignore [attr-defined]
 SETTINGS_FILENAME = "settings.yaml"
 
 
-@dataclasses.dataclass
-class Paths:
-    CONFIG: pathlib.Path
-    DATA: pathlib.Path
-    CACHE: pathlib.Path
-    LOG: pathlib.Path
-
-
-dirs = appdirs.AppDirs(APPNAME, APPAUTHOR)
-
-PATHS = Paths(
-    CONFIG=pathlib.Path(dirs.user_config_dir),
-    DATA=pathlib.Path(dirs.user_data_dir),
-    CACHE=pathlib.Path(dirs.user_cache_dir),
-    LOG=pathlib.Path(dirs.user_log_dir),
+PATHS = _Paths(
+    CONFIG=pathlib.Path(_dirs.user_config_dir),
+    DATA=pathlib.Path(_dirs.user_data_dir),
+    CACHE=pathlib.Path(_dirs.user_cache_dir),
+    LOG=pathlib.Path(_dirs.user_log_dir),
 )

src/playlist/data/settings.py

@@ -45,8 +45,8 @@ class DownloadSettings(base.BaseData["DownloadSettings"]):
     @classmethod
     def create(cls: type[DownloadSettings]) -> DownloadSettings:
         return cls(
-            batch_size=const.Default.BATCH_SIZE.value,
-            process_delay=const.Default.PROCESS_DELAY.value,
+            batch_size=const.DEFAULTS.BATCH_SIZE,
+            process_delay=const.DEFAULTS.PROCESS_DELAY,
         )
 
 
@@ -58,7 +58,7 @@ class TrackSettings(base.BaseData["TrackSettings"]):
 
     @classmethod
     def create(cls: type[TrackSettings]) -> TrackSettings:
-        return cls(duration=const.Default.DURATION.value)
+        return cls(duration=const.DEFAULTS.DURATION)
 
 
 @dataclasses.dataclass
@@ -71,8 +71,8 @@ class PlaylistSettings(base.BaseData["PlaylistSettings"]):
     @classmethod
     def create(cls: type[PlaylistSettings]) -> PlaylistSettings:
         return cls(
-            playtime=const.Default.PLAYTIME.value,
-            max_tracks=const.Default.MAX_TRACKS.value,
+            playtime=const.DEFAULTS.PLAYTIME,
+            max_tracks=const.DEFAULTS.MAX_TRACKS,
         )