story-kit: start 269_story_file_references_in_web_ui_chat_input

server/src/io/fs.rs

@@ -727,6 +727,42 @@ pub async fn create_directory_absolute(path: String) -> Result<bool, String> {
     .map_err(|e| format!("Task failed: {}", e))?
 }
 
+/// List all files in the project recursively, respecting .gitignore.
+/// Returns relative paths from the project root (files only, not directories).
+pub async fn list_project_files(state: &SessionState) -> Result<Vec<String>, String> {
+    let root = state.get_project_root()?;
+    list_project_files_impl(root).await
+}
+
+pub async fn list_project_files_impl(root: PathBuf) -> Result<Vec<String>, String> {
+    use ignore::WalkBuilder;
+
+    let root_clone = root.clone();
+    let files = tokio::task::spawn_blocking(move || {
+        let mut result = Vec::new();
+        let walker = WalkBuilder::new(&root_clone).git_ignore(true).build();
+
+        for entry in walker.flatten() {
+            if entry.file_type().map(|ft| ft.is_file()).unwrap_or(false) {
+                let relative = entry
+                    .path()
+                    .strip_prefix(&root_clone)
+                    .unwrap_or(entry.path())
+                    .to_string_lossy()
+                    .to_string();
+                result.push(relative);
+            }
+        }
+
+        result.sort();
+        result
+    })
+    .await
+    .map_err(|e| format!("Task failed: {e}"))?;
+
+    Ok(files)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -1588,4 +1624,68 @@ mod tests {
             "scaffold should not overwrite existing project.toml"
         );
     }
+
+    // --- list_project_files_impl ---
+
+    #[tokio::test]
+    async fn list_project_files_returns_all_files() {
+        let dir = tempdir().unwrap();
+        fs::create_dir(dir.path().join("src")).unwrap();
+        fs::write(dir.path().join("src/main.rs"), "fn main() {}").unwrap();
+        fs::write(dir.path().join("README.md"), "# readme").unwrap();
+
+        let files = list_project_files_impl(dir.path().to_path_buf())
+            .await
+            .unwrap();
+
+        assert!(files.contains(&"README.md".to_string()));
+        assert!(files.contains(&"src/main.rs".to_string()));
+    }
+
+    #[tokio::test]
+    async fn list_project_files_excludes_dirs_from_output() {
+        let dir = tempdir().unwrap();
+        fs::create_dir(dir.path().join("subdir")).unwrap();
+        fs::write(dir.path().join("file.txt"), "").unwrap();
+
+        let files = list_project_files_impl(dir.path().to_path_buf())
+            .await
+            .unwrap();
+
+        assert!(files.contains(&"file.txt".to_string()));
+        assert!(!files.iter().any(|f| f == "subdir"));
+    }
+
+    #[tokio::test]
+    async fn list_project_files_returns_sorted() {
+        let dir = tempdir().unwrap();
+        fs::write(dir.path().join("z.txt"), "").unwrap();
+        fs::write(dir.path().join("a.txt"), "").unwrap();
+
+        let files = list_project_files_impl(dir.path().to_path_buf())
+            .await
+            .unwrap();
+
+        let a_idx = files.iter().position(|f| f == "a.txt").unwrap();
+        let z_idx = files.iter().position(|f| f == "z.txt").unwrap();
+        assert!(a_idx < z_idx);
+    }
+
+    #[tokio::test]
+    async fn list_project_files_with_state() {
+        let dir = tempdir().unwrap();
+        fs::write(dir.path().join("hello.rs"), "").unwrap();
+        let state = make_state_with_root(dir.path().to_path_buf());
+
+        let files = list_project_files(&state).await.unwrap();
+
+        assert!(files.contains(&"hello.rs".to_string()));
+    }
+
+    #[tokio::test]
+    async fn list_project_files_errors_without_project() {
+        let state = SessionState::default();
+        let result = list_project_files(&state).await;
+        assert!(result.is_err());
+    }
 }