use std::sync::Arc;

use ruma::{EventId, RoomId, UserId};

use crate::{PduCount, PduEvent, Result};

pub trait Data: Send + Sync {
	fn add_relation(&self, from: u64, to: u64) -> Result<()>;
	#[allow(clippy::type_complexity)]
	fn relations_until<'a>(
		&'a self, user_id: &'a UserId, room_id: u64, target: u64, until: PduCount,
	) -> Result<Box<dyn Iterator<Item = Result<(PduCount, PduEvent)>> + 'a>>;
	fn mark_as_referenced(&self, room_id: &RoomId, event_ids: &[Arc<EventId>]) -> Result<()>;
	fn is_event_referenced(&self, room_id: &RoomId, event_id: &EventId) -> Result<bool>;
	fn mark_event_soft_failed(&self, event_id: &EventId) -> Result<()>;
	fn is_event_soft_failed(&self, event_id: &EventId) -> Result<bool>;
}