bevy_htn 0.0.1

A bevy hierarchical task network, using bevy_behave trees as operators
Documentation 
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use crate::dsl::parse_htn;
use crate::htn::HTN;
use crate::HtnStateTrait;
use bevy::asset::{io::Reader, AssetLoader, LoadContext};
use bevy::prelude::*;
use futures_lite::AsyncReadExt;
use rand::Rng;
use std::marker::PhantomData;
use thiserror::Error;

#[derive(Default)]
struct HtnAssetLoader<T: HtnStateTrait> {
    _phantom: PhantomData<T>,
}

impl<T: HtnStateTrait> AssetLoader for HtnAssetLoader<T> {
    type Asset = HtnAsset<T>;
    type Settings = ();
    type Error = HtnAssetError;

    async fn load(
        &self,
        reader: &mut dyn Reader,
        _settings: &(),
        _load_context: &mut LoadContext<'_>,
    ) -> Result<Self::Asset, Self::Error> {
        let mut value = String::new();
        reader.read_to_string(&mut value).await?;
        // info!("Loaded htn: {}", value);
        Ok(HtnAsset {
            htn: parse_htn::<T>(&value).expect("Failed to parse htn"),
            seed: rand::rng().random(),
        })
    }

    fn extensions(&self) -> &[&str] {
        &["htn"]
    }
}

#[derive(Asset, TypePath)]
pub struct HtnAsset<T: HtnStateTrait> {
    pub htn: HTN<T>,
    pub seed: u32,
}

#[non_exhaustive]
#[derive(Debug, Error)]
pub enum HtnAssetError {
    /// An [IO](std::io) Error
    #[error("Could not load htn: {0}")]
    Io(#[from] std::io::Error),
}

#[derive(Default)]
pub struct HtnAssetPlugin<T: HtnStateTrait> {
    _phantom: PhantomData<T>,
}

impl<T: HtnStateTrait> Plugin for HtnAssetPlugin<T> {
    fn build(&self, app: &mut App) {
        app.init_asset_loader::<HtnAssetLoader<T>>();
        app.init_asset::<HtnAsset<T>>();
    }
}

// fn asset_event<T: HtnStateTrait>(
//     mut commands: Commands,

//     mut q: Query<(&HtnSupervisor<T>, &HtnAsset<T>)>,
// ) {
//     for (htn_supervisor, htn_asset) in q.iter() {
// }