UI methods for rendering a modal, and dummy function to check if a modal is open

atst/ui_methods.py

@@ -5,3 +5,12 @@ def dev(self):
 
 def matchesPath(self, href):
     return self.request.uri.startswith(href)
+
+def modal(self, body):
+    return self.render_string(
+      "components/modal.html.to",
+      body=body)
+
+def modalOpen(self):
+    # For now, just check a dummy URL param
+    return self.get_argument("modal", False)