import type { Room } from "../Room";
import type { StateEvent } from "../../storage/types";
import type { Transaction } from "../../storage/idb/Transaction";
import type { ILogItem } from "../../../logging/types";
import type { MemberChange } from "../members/RoomMember";
import type { MemberSync } from "../timeline/persistence/MemberWriter";
/** used for Session.observeRoomState, which observes in all room, but without loading from storage
 * It receives the sync write transaction, so other stores can be updated as part of the same transaction. */
export interface RoomStateHandler {
    handleRoomState(room: Room, stateEvent: StateEvent, memberSync: MemberSync, syncWriteTxn: Transaction, log: ILogItem): Promise<void>;
    updateRoomMembers(room: Room, memberChanges: Map<string, MemberChange>): void;
}
/**
 * used for Room.observeStateType and Room.observeStateTypeAndKey
 * @internal
 * */
export interface StateObserver {
    handleStateEvent(event: StateEvent): any;
    load(roomId: string, txn: Transaction): Promise<void>;
    setRemoveCallback(callback: () => void): any;
}