refactor: move business logic out of presentation — ReadAssetFile, checksum, auth checks, MetadataValue conversions

crates/presentation/src/handlers/assets.rs

@@ -15,7 +15,6 @@ use axum::{
     response::Response,
 };
 use domain::value_objects::{MetadataValue, StructuredData, SystemId};
-use sha2::{Digest, Sha256};
 
 #[derive(Debug, serde::Deserialize)]
 pub struct TimelineParams {
@@ -80,17 +79,12 @@ pub async fn ingest(
         ))
     })?;
 
-    let mut hasher = Sha256::new();
-    hasher.update(&data);
-    let checksum = format!("{:x}", hasher.finalize());
-
     let file_size = data.len() as u64;
 
     let cmd = IngestAssetCommand {
         uploader_id: claims.user_id,
         client_device_id,
         filename: fname,
-        checksum,
         target_path_id: SystemId::from_uuid(path_id),
         file_size,
         data,
@@ -110,11 +104,12 @@ pub async fn ingest(
 
 pub async fn get_asset(
     State(state): State<AppState>,
-    _claims: JwtClaims,
+    claims: JwtClaims,
     Path((asset_id,)): Path<(uuid::Uuid,)>,
 ) -> Result<Json<AssetResponse>, AppError> {
     let query = GetAssetQuery {
         asset_id: SystemId::from_uuid(asset_id),
+        user_id: claims.user_id,
     };
     let (asset, metadata) = state.get_asset_handler.execute(query).await?;
     Ok(Json(AssetResponse::from_domain(&asset, &metadata)))