refactor: optimize item service to reduce redundant database queries

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/modes/server/api/item.rs

@@ -168,7 +168,7 @@ pub async fn handle_get_item_latest_content(
 
     let item_service = AsyncItemService::new(state.data_dir.clone(), state.db.clone(), state.item_service.clone());
 
-    // First find the item to get its ID
+    // First find the item to get its ID and metadata
     let item_with_meta = item_service
         .find_item(vec![], tags, HashMap::new())
         .await;
@@ -176,7 +176,8 @@ pub async fn handle_get_item_latest_content(
     match item_with_meta {
         Ok(item) => {
             let item_id = item.item.id.unwrap();
-            stream_item_content_response(&item_service, item_id, params.allow_binary, params.offset, params.length).await
+            let metadata = item.meta_as_map();
+            stream_item_content_response_with_metadata(&item_service, item_id, &metadata, params.allow_binary, params.offset, params.length).await
         }
         Err(CoreError::ItemNotFoundGeneric) => Err(StatusCode::NOT_FOUND),
         Err(e) => {
@@ -239,6 +240,17 @@ async fn stream_item_content_response(
     })?;
 
     let metadata = item_with_meta.meta_as_map();
+    stream_item_content_response_with_metadata(item_service, item_id, &metadata, allow_binary, offset, length).await
+}
+
+async fn stream_item_content_response_with_metadata(
+    item_service: &AsyncItemService,
+    item_id: i64,
+    metadata: &HashMap<String, String>,
+    allow_binary: bool,
+    offset: u64,
+    length: u64,
+) -> Result<Response, StatusCode> {
     let mime_type = metadata
         .get("mime_type")
         .map(|s| s.to_string())
@@ -265,7 +277,7 @@ async fn stream_item_content_response(
     }
     
     // Now stream the content with the specified offset and length using pre-fetched metadata
-    match item_service.stream_item_content_by_id_with_metadata(item_id, &metadata, true, offset, length).await {
+    match item_service.stream_item_content_by_id_with_metadata(item_id, metadata, true, offset, length).await {
         Ok((stream, _)) => {
             let body = axum::body::Body::from_stream(stream);
             let response = Response::builder()

src/services/item_service.rs

@@ -104,8 +104,15 @@ impl ItemService {
 
         let item = item_maybe.ok_or(CoreError::ItemNotFoundGeneric)?;
         debug!("ITEM_SERVICE: Found matching item: {:?}", item);
+        
+        // Get tags and meta directly instead of calling get_item which makes redundant queries
         let item_id = item.id.ok_or_else(|| CoreError::InvalidInput("Item missing ID".to_string()))?;
-        self.get_item(conn, item_id)
+        let tags = db::get_item_tags(conn, &item)?;
+        debug!("ITEM_SERVICE: Found {} tags for item {}", tags.len(), item_id);
+        let meta = db::get_item_meta(conn, &item)?;
+        debug!("ITEM_SERVICE: Found {} meta entries for item {}", meta.len(), item_id);
+        
+        Ok(ItemWithMeta { item, tags, meta })
     }
 
     pub fn list_items(&self, conn: &Connection, tags: &[String], meta: &HashMap<String, String>) -> Result<Vec<ItemWithMeta>, CoreError> {