How to use the pantalaimon.index.Event function in pantalaimon

def _load_context(self, user, event, before, after):
            context = {}

            if before > 0:
                query = (
                    Event.select()
                    .join(UserMessages)
                    .where(
                        (Event.date <= event.date)
                        & (Event.room_id == event.room_id)
                        & (Event.id != event.id)
                        & (UserMessages.user == user)
                    )
                    .order_by(Event.date.desc())
                    .limit(before)
                )

                context["events_before"] = [e.source for e in query]
            else:
                context["events_before"] = []

            if after > 0:
                query = (
                    Event.select()
                    .join(UserMessages)

.order_by(Event.date.desc())
                    .limit(before)
                )

                context["events_before"] = [e.source for e in query]
            else:
                context["events_before"] = []

            if after > 0:
                query = (
                    Event.select()
                    .join(UserMessages)
                    .where(
                        (Event.date >= event.date)
                        & (Event.room_id == event.room_id)
                        & (Event.id != event.id)
                        & (UserMessages.user == user)
                    )
                    .order_by(Event.date)
                    .limit(after)
                )

                context["events_after"] = [e.source for e in query]
            else:
                context["events_after"] = []

            return context

(Event.date <= event.date)
                        & (Event.room_id == event.room_id)
                        & (Event.id != event.id)
                        & (UserMessages.user == user)
                    )
                    .order_by(Event.date.desc())
                    .limit(before)
                )

                context["events_before"] = [e.source for e in query]
            else:
                context["events_before"] = []

            if after > 0:
                query = (
                    Event.select()
                    .join(UserMessages)
                    .where(
                        (Event.date >= event.date)
                        & (Event.room_id == event.room_id)
                        & (Event.id != event.id)
                        & (UserMessages.user == user)
                    )
                    .order_by(Event.date)
                    .limit(after)
                )

                context["events_after"] = [e.source for e in query]
            else:
                context["events_after"] = []

            return context

def _load_context(self, user, event, before, after):
            context = {}

            if before > 0:
                query = (
                    Event.select()
                    .join(UserMessages)
                    .where(
                        (Event.date <= event.date)
                        & (Event.room_id == event.room_id)
                        & (Event.id != event.id)
                        & (UserMessages.user == user)
                    )
                    .order_by(Event.date.desc())
                    .limit(before)
                )

                context["events_before"] = [e.source for e in query]
            else:
                context["events_before"] = []

            if after > 0:
                query = (
                    Event.select()
                    .join(UserMessages)
                    .where(

def save_event(self, event, room_id, display_name=None, avatar_url=None):
            user, _ = StoreUser.get_or_create(user_id=self.user)

            profile_id, _ = Profile.get_or_create(
                user_id=event.sender, display_name=display_name, avatar_url=avatar_url
            )

            event_source = event.source
            event_source["room_id"] = room_id

            event_id = (
                Event.insert(
                    event_id=event.event_id,
                    sender=event.sender,
                    date=datetime.datetime.fromtimestamp(event.server_timestamp / 1000),
                    room_id=room_id,
                    source=event_source,
                    profile=profile_id,
                )
                .on_conflict_ignore()
                .execute()
            )

            if event_id <= 0:
                return None

            _, created = UserMessages.get_or_create(user=user, event=event_id)

class Event(Model):
        event_id = TextField()
        sender = TextField()
        date = DateTimeField()
        room_id = TextField()

        source = DictField()

        profile = ForeignKeyField(model=Profile, column_name="profile_id")

        class Meta:
            constraints = [SQL("UNIQUE(event_id, room_id, sender, profile_id)")]

    class UserMessages(Model):
        user = ForeignKeyField(model=StoreUser, column_name="user_id")
        event = ForeignKeyField(model=Event, column_name="event_id")

    @attr.s
    class MessageStore:
        user = attr.ib(type=str)
        store_path = attr.ib(type=str)
        database_name = attr.ib(type=str)
        database = attr.ib(type=SqliteDatabase, init=False)
        database_path = attr.ib(type=str, init=False)

        models = [StoreUser, Event, Profile, UserMessages]

        def __attrs_post_init__(self):
            self.database_path = os.path.join(
                os.path.abspath(self.store_path), self.database_name
            )

def event_in_store(self, event_id, room_id):
            user, _ = StoreUser.get_or_create(user_id=self.user)
            query = (
                Event.select()
                .join(UserMessages)
                .where(
                    (Event.room_id == room_id)
                    & (Event.event_id == event_id)
                    & (UserMessages.user == user)
                )
                .execute()
            )

            for _ in query:
                return True

            return False