use crate::Result;
use ruma::{events::receipt::ReceiptEvent, serde::Raw, RoomId, UserId};

pub trait Data: Send + Sync {
    /// Replaces the previous read receipt.
    fn readreceipt_update(
        &self,
        user_id: &UserId,
        room_id: &RoomId,
        event: ReceiptEvent,
    ) -> Result<()>;

    /// Returns an iterator over the most recent read_receipts in a room that happened after the event with id `since`.
    fn readreceipts_since<'a>(
        &'a self,
        room_id: &RoomId,
        since: u64,
    ) -> Box<
        dyn Iterator<
            Item = Result<(
                Box<UserId>,
                u64,
                Raw<ruma::events::AnySyncEphemeralRoomEvent>,
            )>,
        > + 'a,
    >;

    /// Sets a private read marker at `count`.
    fn private_read_set(&self, room_id: &RoomId, user_id: &UserId, count: u64) -> Result<()>;

    /// Returns the private read marker.
    fn private_read_get(&self, room_id: &RoomId, user_id: &UserId) -> Result<Option<u64>>;

    /// Returns the count of the last typing update in this room.
    fn last_privateread_update(&self, user_id: &UserId, room_id: &RoomId) -> Result<u64>;
}