mod data;

pub use data::Data;
use ruma::{events::SyncEphemeralRoomEvent, RoomId, UserId};

use crate::Result;

pub struct Service {
	pub db: &'static dyn Data,
}

impl Service {
	/// Sets a user as typing until the timeout timestamp is reached or
	/// roomtyping_remove is called.
	pub fn typing_add(&self, user_id: &UserId, room_id: &RoomId, timeout: u64) -> Result<()> {
		self.db.typing_add(user_id, room_id, timeout)
	}

	/// Removes a user from typing before the timeout is reached.
	pub fn typing_remove(&self, user_id: &UserId, room_id: &RoomId) -> Result<()> {
		self.db.typing_remove(user_id, room_id)
	}

	/// Makes sure that typing events with old timestamps get removed.
	fn typings_maintain(&self, room_id: &RoomId) -> Result<()> { self.db.typings_maintain(room_id) }

	/// Returns the count of the last typing update in this room.
	pub fn last_typing_update(&self, room_id: &RoomId) -> Result<u64> {
		self.typings_maintain(room_id)?;

		self.db.last_typing_update(room_id)
	}

	/// Returns a new typing EDU.
	pub fn typings_all(
		&self, room_id: &RoomId,
	) -> Result<SyncEphemeralRoomEvent<ruma::events::typing::TypingEventContent>> {
		let user_ids = self.db.typings_all(room_id)?;

		Ok(SyncEphemeralRoomEvent {
			content: ruma::events::typing::TypingEventContent {
				user_ids: user_ids.into_iter().collect(),
			},
		})
	}
}