misc: Use immutable types for constants

backend/handler/filesystem/base_handler.py

@@ -8,7 +8,7 @@ from config.config_manager import config_manager as cm
 TAG_REGEX = re.compile(r"\(([^)]+)\)|\[([^]]+)\]")
 EXTENSION_REGEX = re.compile(r"\.(([a-z]+\.)*\w+)$")
 
-LANGUAGES = [
+LANGUAGES = (
     ("Ar", "Arabic"),
     ("Da", "Danish"),
     ("De", "German"),
@@ -27,9 +27,9 @@ LANGUAGES = [
     ("Sv", "Swedish"),
     ("Zh", "Chinese"),
     ("nolang", "No Language"),
-]
+)
 
-REGIONS = [
+REGIONS = (
     ("A", "Australia"),
     ("AS", "Asia"),
     ("B", "Brazil"),
@@ -57,13 +57,13 @@ REGIONS = [
     ("UNK", "Unknown"),
     ("UNL", "Unlicensed"),
     ("W", "World"),
-]
+)
 
 REGIONS_BY_SHORTCODE = {region[0].lower(): region[1] for region in REGIONS}
-REGIONS_NAME_KEYS = [region[1].lower() for region in REGIONS]
+REGIONS_NAME_KEYS = frozenset(region[1].lower() for region in REGIONS)
 
 LANGUAGES_BY_SHORTCODE = {lang[0].lower(): lang[1] for lang in LANGUAGES}
-LANGUAGES_NAME_KEYS = [lang[1].lower() for lang in LANGUAGES]
+LANGUAGES_NAME_KEYS = frozenset(lang[1].lower() for lang in LANGUAGES)
 
 
 class CoverSize(Enum):

backend/handler/filesystem/roms_handler.py

@@ -36,23 +36,27 @@ from .base_handler import (
     FSHandler,
 )
 
-# list of known compressed file MIME types
-COMPRESSED_MIME_TYPES: Final = [
-    "application/zip",
-    "application/x-tar",
-    "application/x-gzip",
-    "application/x-7z-compressed",
-    "application/x-bzip2",
-]
+# Known compressed file MIME types
+COMPRESSED_MIME_TYPES: Final = frozenset(
+    (
+        "application/x-7z-compressed",
+        "application/x-bzip2",
+        "application/x-gzip",
+        "application/x-tar",
+        "application/zip",
+    )
+)
 
-# list of known file extensions that are compressed
-COMPRESSED_FILE_EXTENSIONS = [
-    ".zip",
-    ".tar",
-    ".gz",
-    ".7z",
-    ".bz2",
-]
+# Known file extensions that are compressed
+COMPRESSED_FILE_EXTENSIONS = frozenset(
+    (
+        ".7z",
+        ".bz2",
+        ".gz",
+        ".tar",
+        ".zip",
+    )
+)
 
 FILE_READ_CHUNK_SIZE = 1024 * 8
 

backend/handler/metadata/igdb_handler.py

@@ -721,7 +721,7 @@ class TwitchAuth(MetadataHandler):
         return token
 
 
-PLATFORMS_FIELDS = [
+PLATFORMS_FIELDS = (
     "id",
     "name",
     "category",
@@ -730,9 +730,9 @@ PLATFORMS_FIELDS = [
     "platform_family.name",
     "platform_family.slug",
     "platform_logo.url",
-]
+)
 
-GAMES_FIELDS = [
+GAMES_FIELDS = (
     "id",
     "name",
     "slug",
@@ -782,9 +782,9 @@ GAMES_FIELDS = [
     "similar_games.cover.url",
     "age_ratings.rating",
     "videos.video_id",
-]
+)
 
-SEARCH_FIELDS = ["game.id", "name"]
+SEARCH_FIELDS = ("game.id", "name")
 
 # Generated from the following code on https://www.igdb.com/platforms/:
 # Array.from(document.querySelectorAll(".media-body a")).map(a => ({
@@ -792,7 +792,7 @@ SEARCH_FIELDS = ["game.id", "name"]
 #   name: a.innerText
 # }))
 
-IGDB_PLATFORM_LIST = [
+IGDB_PLATFORM_LIST = (
     {"slug": "visionos", "name": "visionOS"},
     {"slug": "meta-quest-3", "name": "Meta Quest 3"},
     {"slug": "atari2600", "name": "Atari 2600"},
@@ -1009,7 +1009,7 @@ IGDB_PLATFORM_LIST = [
     {"slug": "onlive-game-system", "name": "OnLive Game System"},
     {"slug": "vc", "name": "Virtual Console"},
     {"slug": "airconsole", "name": "AirConsole"},
-]
+)
 
 IGDB_PLATFORM_CATEGORIES: dict[int, str] = {
     0: "Unknown",

backend/handler/scan_handler.py

@@ -20,34 +20,36 @@ from models.platform import Platform
 from models.rom import Rom
 from models.user import User
 
-NON_HASHABLE_PLATFORMS = [
-    "pc",
-    "win",
-    "mac",
-    "linux",
-    "switch",
-    "ps3",
-    "ps4",
-    "ps4--1",
-    "ps5",
-    "wiiu",
-    "xbox-360",
-    "xboxone",
-    "series-x",
-    "android",
-    "ios",
-    "ipad",
-    "amazon-alexa",
-    "amazon-fire-tv",
-    "gear-vr",
-    "meta-quest-2",
-    "meta-quest-3",
-    "oculus-go",
-    "oculus-quest",
-    "oculus-rift",
-    "psvr",
-    "psvr2",
-]
+NON_HASHABLE_PLATFORMS = frozenset(
+    (
+        "amazon-alexa",
+        "amazon-fire-tv",
+        "android",
+        "gear-vr",
+        "ios",
+        "ipad",
+        "linux",
+        "mac",
+        "meta-quest-2",
+        "meta-quest-3",
+        "oculus-go",
+        "oculus-quest",
+        "oculus-rift",
+        "pc",
+        "ps3",
+        "ps4",
+        "ps4--1",
+        "ps5",
+        "psvr",
+        "psvr2",
+        "series-x",
+        "switch",
+        "wiiu",
+        "win",
+        "xbox-360",
+        "xboxone",
+    )
+)
 
 
 class ScanType(Enum):