Core: store multidata/multisave enums by value on py3.11 (#1783)

This is what py3.10 did and should be better for AP than the new default

NetUtils.py

@@ -6,7 +6,7 @@ from json import JSONEncoder, JSONDecoder
 
 import websockets
 
-from Utils import Version
+from Utils import ByValue, Version
 
 
 class JSONMessagePart(typing.TypedDict, total=False):
@@ -20,7 +20,7 @@ class JSONMessagePart(typing.TypedDict, total=False):
     flags: int
 
 
-class ClientStatus(enum.IntEnum):
+class ClientStatus(ByValue, enum.IntEnum):
     CLIENT_UNKNOWN = 0
     CLIENT_CONNECTED = 5
     CLIENT_READY = 10
@@ -28,7 +28,7 @@ class ClientStatus(enum.IntEnum):
     CLIENT_GOAL = 30
 
 
-class SlotType(enum.IntFlag):
+class SlotType(ByValue, enum.IntFlag):
     spectator = 0b00
     player = 0b01
     group = 0b10
@@ -39,7 +39,7 @@ class SlotType(enum.IntFlag):
         return self.value != 0b01
 
 
-class Permission(enum.IntFlag):
+class Permission(ByValue, enum.IntFlag):
     disabled = 0b000  # 0, completely disables access
     enabled = 0b001  # 1, allows manual use
     goal = 0b010  # 2, allows manual use after goal completion

Utils.py

@@ -508,6 +508,15 @@ def restricted_loads(s):
     return RestrictedUnpickler(io.BytesIO(s)).load()
 
 
+class ByValue:
+    """
+    Mixin for enums to pickle value instead of name (restores pre-3.11 behavior). Use as left-most parent.
+    See https://github.com/python/cpython/pull/26658 for why this exists.
+    """
+    def __reduce_ex__(self, prot):
+        return self.__class__, (self._value_, )
+
+
 class KeyedDefaultDict(collections.defaultdict):
     """defaultdict variant that uses the missing key as argument to default_factory"""
     default_factory: typing.Callable[[typing.Any], typing.Any]