give access to CEL reference extraction

src/lib.rs

@@ -265,6 +265,32 @@ fn evaluate_cel_internal(expression: &str, context: &JsValue) -> Result<Value, S
         .map_err(|e| format!("Execution error: {}", e))
 }
 
+/// Extract all identifiers referenced in a CEL expression
+#[wasm_bindgen]
+pub fn extract_cel_references(expression: &str) -> Result<js_sys::Array, JsValue> {
+    // Compile the CEL expression
+    let program = Program::compile(expression)
+        .map_err(|e| JsValue::from_str(&format!("Compilation error: {}", e)))?;
+
+    // Get references using the references() method
+    let references = program.references();
+
+    // Convert to JS array
+    let js_array = js_sys::Array::new();
+
+    // Convert each reference to a JsValue and push it to the JS array
+    for reference in references.variables().iter() {
+        js_array.push(&JsValue::from_str(reference));
+    }
+
+    // Also add function references if available
+    for function in references.functions().iter() {
+        js_array.push(&JsValue::from_str(&format!("function:{}", function)));
+    }
+
+    Ok(js_array)
+}
+
 /// Initialize the WASM module (optional, for debugging)
 #[wasm_bindgen(start)]
 pub fn main() {