From 9f16507564354422b64e437e547d8403b22b70c7 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Thu, 27 Mar 2025 14:38:31 +0100
Subject: lay a foundation for subresource listings

---
 shared/src/lib.rs       |  3 ++-
 shared/src/loader.rs    | 13 +++++++++++++
 shared/src/packets.rs   |  5 +++++
 shared/src/resources.rs | 44 +++++++++++++++++++++++++++++++++++++++++++-
 4 files changed, 63 insertions(+), 2 deletions(-)
 create mode 100644 shared/src/loader.rs

diff --git a/shared/src/lib.rs b/shared/src/lib.rs
index c3d8d6b..61828fc 100644
--- a/shared/src/lib.rs
+++ b/shared/src/lib.rs
@@ -25,8 +25,9 @@
 pub mod helper;
 pub mod packets;
 pub mod resources;
+pub mod respack;
 pub mod store;
 pub mod tree;
-pub mod respack;
+pub mod loader;
 
 pub use glam::{Affine3A, Mat3A, Vec2, Vec3A, Vec4, vec2, vec3a, vec4};
diff --git a/shared/src/loader.rs b/shared/src/loader.rs
new file mode 100644
index 0000000..0172265
--- /dev/null
+++ b/shared/src/loader.rs
@@ -0,0 +1,13 @@
+use crate::{helper::ReadWrite, packets::Resource};
+use anyhow::Result;
+use std::io::Cursor;
+
+pub trait ResLoader: Send + Sync {
+    fn get_raw(&self, res: Resource) -> impl Future<Output = Result<Vec<u8>>> + Send;
+    fn get<R: ReadWrite + Sync>(
+        &self,
+        res: &Resource<R>,
+    ) -> impl Future<Output = Result<R>> + Send {
+        async { R::read(&mut Cursor::new(self.get_raw(res.to_generic()).await?)) }
+    }
+}
diff --git a/shared/src/packets.rs b/shared/src/packets.rs
index 11b5f8a..c03f5e5 100644
--- a/shared/src/packets.rs
+++ b/shared/src/packets.rs
@@ -51,6 +51,11 @@ impl<T> Ord for Resource<T> {
         self.0.cmp(&other.0)
     }
 }
+impl<T> Resource<T> {
+    pub fn to_generic(&self) -> Resource {
+        Resource(self.0, PhantomData)
+    }
+}
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct Object(pub u128);
diff --git a/shared/src/resources.rs b/shared/src/resources.rs
index 5fa810d..4d14633 100644
--- a/shared/src/resources.rs
+++ b/shared/src/resources.rs
@@ -14,7 +14,7 @@
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
-use crate::{helper::ReadWrite, packets::Resource};
+use crate::{helper::ReadWrite, loader::ResLoader, packets::Resource};
 use anyhow::Result;
 use glam::{Affine3A, Vec2, Vec3A, Vec4};
 use log::warn;
@@ -280,3 +280,45 @@ impl ReadWrite for Image<'_> {
         self.0.write_alloc()
     }
 }
+
+pub trait Subresources {
+    fn subresources(&self, l: &impl ResLoader) -> impl Future<Output = Result<Vec<Resource>>>;
+}
+impl Subresources for Prefab {
+    async fn subresources(&self, l: &impl ResLoader) -> Result<Vec<Resource>> {
+        let mut o = Vec::new();
+        for (_, mesh) in &self.mesh {
+            o.extend(l.get(mesh).await?.subresources(l).await?);
+        }
+        Ok(o)
+    }
+}
+impl Subresources for MeshPart {
+    async fn subresources(&self, _l: &impl ResLoader) -> Result<Vec<Resource>> {
+        Ok(None
+            .into_iter()
+            .chain(self.index.iter().map(Resource::to_generic))
+            .chain(self.va_position.iter().map(Resource::to_generic))
+            .chain(self.va_normal.iter().map(Resource::to_generic))
+            .chain(self.va_tangent.iter().map(Resource::to_generic))
+            .chain(self.va_texcoord.iter().map(Resource::to_generic))
+            .chain(self.va_roughness.iter().map(Resource::to_generic))
+            .chain(self.va_metallic.iter().map(Resource::to_generic))
+            .chain(self.va_albedo.iter().map(Resource::to_generic))
+            .chain(self.va_transmission.iter().map(Resource::to_generic))
+            .chain(self.va_alpha.iter().map(Resource::to_generic))
+            .chain(self.va_emission.iter().map(Resource::to_generic))
+            .chain(self.va_joint_index.iter().map(Resource::to_generic))
+            .chain(self.va_joint_weight.iter().map(Resource::to_generic))
+            .chain(self.tex_normal.iter().map(Resource::to_generic))
+            .chain(self.tex_roughness.iter().map(Resource::to_generic))
+            .chain(self.tex_metallic.iter().map(Resource::to_generic))
+            .chain(self.tex_albedo.iter().map(Resource::to_generic))
+            .chain(self.tex_transmission.iter().map(Resource::to_generic))
+            .chain(self.tex_alpha.iter().map(Resource::to_generic))
+            .chain(self.tex_emission.iter().map(Resource::to_generic))
+            .chain(self.tex_thickness.iter().map(Resource::to_generic))
+            .chain(self.tex_occlusion.iter().map(Resource::to_generic))
+            .collect())
+    }
+}
-- 
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