refactor(engine): make asset importers per asset type

1 files changed, 12 insertions, 2 deletions

diff --git a/engine/src/rendering/shader.rs b/engine/src/rendering/shader.rs
index 085773b..061d9ac 100644
--- a/engine/src/rendering/shader.rs
+++ b/engine/src/rendering/shader.rs
@@ -22,6 +22,7 @@ use shader_slang::{
 };
 
 use crate::asset::{
+    Asset,
     Assets,
     Event as AssetEvent,
     Handle as AssetHandle,
@@ -53,6 +54,8 @@ pub struct ModuleSource
     pub link_entrypoints: EntrypointFlags,
 }
 
+impl Asset for ModuleSource {}
+
 bitflags! {
     #[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
     pub struct EntrypointFlags: usize
@@ -1262,12 +1265,16 @@ struct VarInput<'a>
     index: usize,
 }
 
-fn import_slang_asset(
+fn import(
     asset_submitter: &mut AssetSubmitter<'_>,
     file_path: &Path,
     settings: Option<&'_ Settings>,
 ) -> Result<(), ImportError>
 {
+    if file_path.extension().is_none_or(|ext| ext != "slang") {
+        return Err(ImportError::UnsupportedFileType);
+    }
+
     let file_name = file_path
         .file_name()
         .ok_or(ImportError::NoPathFileName)?
@@ -1295,6 +1302,9 @@ fn import_slang_asset(
 #[derive(Debug, thiserror::Error)]
 enum ImportError
 {
+    #[error("File type is unsupported")]
+    UnsupportedFileType,
+
     #[error("Failed to read file")]
     ReadFileFailed(#[source] std::io::Error),
 
@@ -1362,7 +1372,7 @@ fn initialize(mut assets: Single<Assets>) -> Result<(), crate::Error>
 {
     let assets = assets.get_mut()?;
 
-    assets.set_importer::<_, _>(["slang"], import_slang_asset);
+    assets.set_importer::<ModuleSource, Settings, ImportError>(import);
 
     Ok(())
 }