Start defining the return type.

src/bin_wasm.rs

@@ -1,7 +1,17 @@
 #![no_main]
+
+use organic::parser::parse_with_settings;
+use organic::settings::GlobalSettings;
+use wasm::ParseResult;
 use wasm_bindgen::prelude::wasm_bindgen;
 
+mod wasm;
+
 #[wasm_bindgen]
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
+pub fn parse_org(org_contents: &str) -> wasm_bindgen::JsValue {
+    let global_settings = GlobalSettings::default();
+    let rust_parsed = parse_with_settings(org_contents, &global_settings)
+        .map(|document| ParseResult::Success(document.into()))
+        .unwrap_or_else(|err| ParseResult::Error(format!("{:?}", err)));
+    serde_wasm_bindgen::to_value(&rust_parsed).unwrap()
 }