mod dir;
pub use dir::*;

mod s3;
pub use s3::*;

pub mod misc;

use chrono::{DateTime, Utc};
use tokio_stream::wrappers::ReceiverStream;

/// A read-only set of [Item]s.
pub trait DataSource {
	/// Get an item from this datasource
	fn get(
		&self,
		key: &str,
	) -> impl Future<Output = Result<Option<crate::value::Item>, std::io::Error>> + Send;

	/// Iterate over all items in this source in an arbitrary order
	fn iter(&self) -> ReceiverStream<Result<crate::value::Item, std::io::Error>>;

	/// Return the time of the latest change to the data in this source
	fn latest_change(
		&self,
	) -> impl Future<Output = Result<Option<DateTime<Utc>>, std::io::Error>> + Send;
}