How to register own asset with own handle?

[fe3dback]

Hi, i have some file format, that looks like this:

[
    (
        id: "Snd-sHit",  // <-- THIS IS Handle
        ...
        samples: [
            (
                sample_id: "ssmp-bhit1",
                volume: 1.1,
            ),
            (
                sample_id: "ssmp-bhit2",
                volume: 1.1,
            )
        ],
        ..
    ),
    (
        id: "Snd-other2",  // <-- THIS IS Handle
    )
]

This file format is just a list of sub-assets, that can be any type.
But every sub-asset has field id.

This field id, internally stored as u64 and can be caster to uuid, and then can be casted to unique Handle(uuid).

example:

Handle::Weak(
  Uuid::from_fields(0, 0, 0, &id.raw.to_be_bytes()) // id.raw here is u64 that created from string like this "Snd-sHit"
)

Then i trying to write asset loader, that must register each sub-asset in asset storage, with my handle, but i can`t find this functionality.

Example of my loader:

impl AssetLoader for AssetMultiRonLoader {
    async fn load(
        ctx: &mut LoadContext<'_>,
        reader: &mut dyn Reader,
    ) -> Result<AssetMultiRon, Error> {

    ....
    register_assets_from_list(ctx, list).context("failed register assets from list")?;

    ....
    }

    fn register_assets_from_list(
        ctx: &mut LoadContext<'_>,
        list: Vec<MultiRonUntypedAsset>,
    ) -> Result<()> {
        for elem in list {
            match elem.id.category().to_string().as_str() {
                "Snd" => {
                    let sound: AssetSoundMeta = ron::from_str::<AssetSoundMeta>(&String::from_utf8(elem.content)?)?;
                    let handle: Handle<AssetSoundMeta> = IdOf::<AssetSoundMeta>::from_untyped(elem.id)?.handle();

                    // i want here some function like:
                    // todo: ctx.add_asset(handle, sound);
                }
            }
        }

        Ok(())
    }
}

How i can achieve this?

[MrGVSV]

Instead of generating your own handle based on the bytes of id, could you use the id as a label? Then you can call add_labeled_asset to get the generated handle.

Or does that not fit your needs?

[fe3dback]

About labeled assets, they don't free you from having to store a handle on the underlying asset somewhere to add that label to it later.

In my case, I already have a main unique id that could be used to make a static handle anywhere in the code, that points to loaded asset. And that would be super cool.

The only option I see so far is to store a large map table in memory somewhere, like (myUuid -> bevyHandle(uuid)). And then access resources indirectly in two steps:

• get handle by uuid from this map
• get asset by this handle

but it's not very convenient, because my uuid is already unique ID and this is same id that bevy can store in Handle (AssetId::Uuid)