[oden] JavaScript, god help me

src/script.rs

@@ -1,7 +1,10 @@
 use oden_js as js;
 
 pub struct ScriptContext {
-    _context: js::Context,
+    context: js::Context,
+    init: js::Value,
+    update: js::Value,
+    draw: js::Value,
 }
 
 impl ScriptContext {
@@ -13,10 +16,40 @@ impl ScriptContext {
         context.add_intrinsic_bigdecimal();
         context.add_intrinsic_operators();
 
-        ScriptContext { _context: context }
+        let js = include_str!("main.js");
+        let module = context
+            .load_module(js, "main.js")
+            .expect("Unable to load main");
+
+        let init = module
+            .get_module_export(&context, "init")
+            .expect("Unable to fetch init");
+        let update = module
+            .get_module_export(&context, "update")
+            .expect("Unable to fetch update");
+        let draw = module
+            .get_module_export(&context, "draw")
+            .expect("Unable to fetch draw");
+
+        ScriptContext {
+            context,
+            init,
+            update,
+            draw,
+        }
     }
 
-    pub fn update(&self) {}
+    pub fn init(&self) {
+        self.init.call(&self.context).expect("Exception in init");
+    }
 
-    pub fn render(&self) {}
+    pub fn update(&self) {
+        self.update
+            .call(&self.context)
+            .expect("Exception in update");
+    }
+
+    pub fn render(&self) {
+        self.draw.call(&self.context).expect("Exception in draw");
+    }
 }