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//! ECS audio bundles

use amethyst_assets::Processor;
use amethyst_core::{
    bundle::SystemBundle,
    ecs::prelude::{DispatcherBuilder, World},
    SystemDesc,
};
use amethyst_error::Error;

use crate::{output::Output, source::*, systems::AudioSystemDesc};

/// Audio bundle
///
/// This will only add the audio system and the asset processor for `Source`.
///
/// `DjSystem` must be added separately if you want to use our background music system.
///
/// The generic N type should be the same as the one in `Transform`.
#[derive(Default, Debug)]
pub struct AudioBundle(Output);

impl<'a, 'b> SystemBundle<'a, 'b> for AudioBundle {
    fn build(
        self,
        world: &mut World,
        builder: &mut DispatcherBuilder<'a, 'b>,
    ) -> Result<(), Error> {
        builder.add(
            AudioSystemDesc::new(self.0).build(world),
            "audio_system",
            &[],
        );
        builder.add(Processor::<Source>::new(), "source_processor", &[]);
        Ok(())
    }
}