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use crate::encoding;
use crate::io::provider::{PackedAction, PackedDelta, PackedState, StreamType, Timestamp};
use anyhow::Error;
use serde::{de::DeserializeOwned, Deserialize, Serialize};
use std::cmp::Ordering;
use std::fmt;
pub trait DataFraction:
DeserializeOwned + Serialize + Clone + fmt::Debug + Sync + Send + 'static
{
}
impl<T> DataFraction for T where
T: DeserializeOwned + Serialize + Clone + fmt::Debug + Sync + Send + 'static
{
}
pub trait Flow: DataFraction {
type Action: DataFraction;
type Event: DataFraction;
fn stream_type() -> StreamType;
fn apply(&mut self, event: TimedEvent<Self::Event>);
fn pack_state(&self) -> Result<PackedState, Error> {
encoding::pack(self)
}
fn unpack_state(data: &PackedState) -> Result<Self, Error> {
encoding::unpack(data)
}
fn pack_delta(delta: &[TimedEvent<Self::Event>]) -> Result<PackedDelta, Error> {
encoding::pack(delta)
}
fn unpack_delta(data: &PackedDelta) -> Result<Delta<Self::Event>, Error> {
encoding::unpack(data)
}
fn pack_action(action: &Self::Action) -> Result<PackedAction, Error> {
encoding::pack(action)
}
fn unpack_action(data: &PackedAction) -> Result<Self::Action, Error> {
encoding::unpack(data)
}
}
pub type Delta<T> = Vec<TimedEvent<T>>;
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct TimedEvent<T> {
pub timestamp: Timestamp,
pub event: T,
}
impl<T> TimedEvent<T> {
pub fn into_inner(self) -> T {
self.event
}
}
impl<T> Ord for TimedEvent<T> {
fn cmp(&self, other: &Self) -> Ordering {
self.timestamp.cmp(&other.timestamp)
}
}
impl<T> PartialOrd for TimedEvent<T> {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl<T> PartialEq for TimedEvent<T> {
fn eq(&self, other: &Self) -> bool {
self.timestamp == other.timestamp
}
}
impl<T> Eq for TimedEvent<T> {}