Implements caching system with TTL and member filtering

Introduces a flexible caching infrastructure with time-to-live support and configurable member caching based on status, voice state, and join events.

Adds AudioSink abstract base class to support audio output handling in voice connections.

Replaces direct dictionary access with cache objects throughout the client, enabling automatic expiration and intelligent member filtering based on user-defined flags.

Updates guild parsing to incorporate presence and voice state data for more accurate member caching decisions.

disagreement/audio.py

@@ -114,3 +114,20 @@ class FFmpegAudioSource(AudioSource):
         if isinstance(self.source, io.IOBase):
             with contextlib.suppress(Exception):
                 self.source.close()
+
+class AudioSink:
+    """Abstract base class for audio sinks."""
+
+    def write(self, user, data):
+        """Write a chunk of PCM audio.
+
+        Subclasses must implement this. The data is raw PCM at 48kHz
+        stereo.
+        """
+
+        raise NotImplementedError
+
+    def close(self) -> None:
+        """Cleanup the sink when the voice client disconnects."""
+
+        return None

disagreement/cache.py

@@ -4,7 +4,8 @@ import time
 from typing import TYPE_CHECKING, Dict, Generic, Optional, TypeVar
 
 if TYPE_CHECKING:
-    from .models import Channel, Guild
+    from .models import Channel, Guild, Member
+    from .caching import MemberCacheFlags
 
 T = TypeVar("T")
 
@@ -53,3 +54,32 @@ class GuildCache(Cache["Guild"]):
 
 class ChannelCache(Cache["Channel"]):
     """Cache specifically for :class:`Channel` objects."""
+
+
+class MemberCache(Cache["Member"]):
+    """
+    A cache for :class:`Member` objects that respects :class:`MemberCacheFlags`.
+    """
+
+    def __init__(self, flags: MemberCacheFlags, ttl: Optional[float] = None) -> None:
+        super().__init__(ttl)
+        self.flags = flags
+
+    def _should_cache(self, member: Member) -> bool:
+        """Determines if a member should be cached based on the flags."""
+        if self.flags.all:
+            return True
+        if self.flags.none:
+            return False
+
+        if self.flags.online and member.status != "offline":
+            return True
+        if self.flags.voice and member.voice_state is not None:
+            return True
+        if self.flags.joined and getattr(member, "_just_joined", False):
+            return True
+        return False
+
+    def set(self, key: str, value: Member) -> None:
+        if self._should_cache(value):
+            super().set(key, value)

disagreement/caching.py

@@ -0,0 +1,120 @@
+from __future__ import annotations
+
+import operator
+from typing import Any, Callable, ClassVar, Dict, Iterator, Tuple
+
+
+class _MemberCacheFlagValue:
+    flag: int
+
+    def __init__(self, func: Callable[[Any], bool]):
+        self.flag = getattr(func, 'flag', 0)
+        self.__doc__ = func.__doc__
+
+    def __get__(self, instance: 'MemberCacheFlags', owner: type) -> Any:
+        if instance is None:
+            return self
+        return instance.value & self.flag != 0
+
+    def __set__(self, instance: Any, value: bool) -> None:
+        if value:
+            instance.value |= self.flag
+        else:
+            instance.value &= ~self.flag
+
+    def __repr__(self) -> str:
+        return f'<{self.__class__.__name__} flag={self.flag}>'
+
+
+def flag_value(flag: int) -> Callable[[Callable[[Any], bool]], _MemberCacheFlagValue]:
+    def decorator(func: Callable[[Any], bool]) -> _MemberCacheFlagValue:
+        setattr(func, 'flag', flag)
+        return _MemberCacheFlagValue(func)
+    return decorator
+
+
+class MemberCacheFlags:
+    __slots__ = ('value',)
+
+    VALID_FLAGS: ClassVar[Dict[str, int]] = {
+        'joined': 1 << 0,
+        'voice': 1 << 1,
+        'online': 1 << 2,
+    }
+    DEFAULT_FLAGS: ClassVar[int] = 1 | 2 | 4
+    ALL_FLAGS: ClassVar[int] = sum(VALID_FLAGS.values())
+
+    def __init__(self, **kwargs: bool):
+        self.value = self.DEFAULT_FLAGS
+        for key, value in kwargs.items():
+            if key not in self.VALID_FLAGS:
+                raise TypeError(f'{key!r} is not a valid member cache flag.')
+            setattr(self, key, value)
+
+    @classmethod
+    def _from_value(cls, value: int) -> MemberCacheFlags:
+        self = cls.__new__(cls)
+        self.value = value
+        return self
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, MemberCacheFlags) and self.value == other.value
+
+    def __ne__(self, other: object) -> bool:
+        return not self.__eq__(other)
+
+    def __hash__(self) -> int:
+        return hash(self.value)
+
+    def __repr__(self) -> str:
+        return f'<MemberCacheFlags value={self.value}>'
+
+    def __iter__(self) -> Iterator[Tuple[str, bool]]:
+        for name in self.VALID_FLAGS:
+            yield name, getattr(self, name)
+
+    def __int__(self) -> int:
+        return self.value
+
+    def __index__(self) -> int:
+        return self.value
+
+    @classmethod
+    def all(cls) -> MemberCacheFlags:
+        """A factory method that creates a :class:`MemberCacheFlags` with all flags enabled."""
+        return cls._from_value(cls.ALL_FLAGS)
+
+    @classmethod
+    def none(cls) -> MemberCacheFlags:
+        """A factory method that creates a :class:`MemberCacheFlags` with all flags disabled."""
+        return cls._from_value(0)
+
+    @classmethod
+    def only_joined(cls) -> MemberCacheFlags:
+        """A factory method that creates a :class:`MemberCacheFlags` with only the `joined` flag enabled."""
+        return cls._from_value(cls.VALID_FLAGS['joined'])
+
+    @classmethod
+    def only_voice(cls) -> MemberCacheFlags:
+        """A factory method that creates a :class:`MemberCacheFlags` with only the `voice` flag enabled."""
+        return cls._from_value(cls.VALID_FLAGS['voice'])
+
+    @classmethod
+    def only_online(cls) -> MemberCacheFlags:
+        """A factory method that creates a :class:`MemberCacheFlags` with only the `online` flag enabled."""
+        return cls._from_value(cls.VALID_FLAGS['online'])
+
+    @flag_value(1 << 0)
+    def joined(self) -> bool:
+        """Whether to cache members that have just joined the guild."""
+        return False
+
+    @flag_value(1 << 1)
+    def voice(self) -> bool:
+        """Whether to cache members that are in a voice channel."""
+        return False
+
+    @flag_value(1 << 2)
+    def online(self) -> bool:
+        """Whether to cache members that are online."""
+        return False

disagreement/event_dispatcher.py

@@ -76,7 +76,7 @@ class EventDispatcher:
         """Parses MESSAGE_DELETE and updates message cache."""
         message_id = data.get("id")
         if message_id:
-            self._client._messages.pop(message_id, None)
+            self._client._messages.invalidate(message_id)
         return data
 
     def _parse_message_reaction_raw(self, data: Dict[str, Any]) -> Dict[str, Any]:
@@ -124,7 +124,7 @@ class EventDispatcher:
         """Parses GUILD_MEMBER_ADD into a Member object."""
 
         guild_id = str(data.get("guild_id"))
-        return self._client.parse_member(data, guild_id)
+        return self._client.parse_member(data, guild_id, just_joined=True)
 
     def _parse_guild_member_remove(self, data: Dict[str, Any]):
         """Parses GUILD_MEMBER_REMOVE into a GuildMemberRemove model."""