gmt_dos-actors 4.0.0

use crate::{
    io::{Data, Read, UniqueIdentifier, Write},
    Update,
};
use std::{
    marker::PhantomData,
    mem,
    ops::{AddAssign, DivAssign},
    sync::Arc,
};

/// Rate transitionner
#[derive(Debug)]
pub struct Average<T, U: UniqueIdentifier<Data = Vec<T>>, V: UniqueIdentifier<Data = Vec<T>> = U> {
    data: Vec<T>,
    count: u32,
    input: PhantomData<U>,
    output: PhantomData<V>,
}
impl<T, U, V> Average<T, U, V>
where
    T: Default + Clone,
    U: UniqueIdentifier<Data = Vec<T>>,
    V: UniqueIdentifier<Data = Vec<T>>,
{
    /// Creates a new sampler with initial condition
    pub fn new(n_data: usize) -> Self {
        Self {
            data: vec![T::default(); n_data],
            count: 0,
            input: PhantomData,
            output: PhantomData,
        }
    }
}
impl<T, U: UniqueIdentifier<Data = Vec<T>>, V: UniqueIdentifier<Data = Vec<T>>> Update
    for Average<T, U, V>
{
}
impl<U, T, V> Read<U> for Average<T, U, V>
where
    U: UniqueIdentifier<Data = Vec<T>>,
    T: Copy + AddAssign,
    V: UniqueIdentifier<Data = Vec<T>>,
{
    fn read(&mut self, data: Arc<Data<U>>) {
        self.data
            .iter_mut()
            .zip(&**data)
            .for_each(|(u, &x)| *u += x);
        self.count += 1;
    }
}
impl<T, U, V> Write<V> for Average<T, U, V>
where
    T: Copy + DivAssign + TryFrom<u32>,
    U: UniqueIdentifier<Data = Vec<T>>,
    V: UniqueIdentifier<Data = Vec<T>>,
{
    fn write(&mut self) -> Option<Arc<Data<V>>> {
        if self.count > 0 {
            if let Ok(count) = T::try_from(self.count) {
                self.data.iter_mut().for_each(|x| *x /= count);
                self.count = 0;
                Some(Arc::new(Data::new(mem::take(&mut self.data))))
            } else {
                None
            }
        } else {
            None
        }
    }
}