Update

1 files changed, 45 insertions, 0 deletions

diff --git a/src/module.rs b/src/module.rs
new file mode 100644
index 0000000..1fc4100
--- /dev/null
+++ b/src/module.rs
@@ -0,0 +1,45 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn log_info(msg: i8) {
+    log::info!("{:?}", msg);
+}
+
+#[wasm_bindgen(module="/src/js/module.js")]
+extern "C" {
+    fn js_build_interface() -> js_sys::Object;
+}
+
+pub struct Module {
+    pub wasm: js_sys::WebAssembly::Instance,
+}
+
+impl Module {
+    pub async fn new(bytes: &[u8]) -> Option<Self> {
+        let imp = js_build_interface();
+        let o = wasm_bindgen_futures::JsFuture::from(
+            js_sys::WebAssembly::instantiate_buffer(bytes, &imp)
+        ).await.unwrap();
+        let i = js_sys::Reflect::get(&o, &"instance".into()).unwrap();
+        if let Ok(wasm) = i.dyn_into::<js_sys::WebAssembly::Instance>() {
+            Some(Self {
+                wasm,
+            })
+        } else {
+            log::info!("failed 3");
+            None
+        }
+    }
+    pub fn call(&self, nm: &str) {
+        let exp = self.wasm.exports();
+        if let Ok(fo) = js_sys::Reflect::get(&exp, &nm.into()) {
+            if let Ok(func) = fo.dyn_into::<js_sys::Function>() {
+                let _ = func.call0(&JsValue::undefined());
+            } else {
+                log::warn!("couldn't cast module function: {}", nm);
+            }
+        } else {
+            log::warn!("couldn't find module function: {}", nm);
+        }
+    }
+}