add javascript example

example/provider/javascript/js/startup.js

@@ -1,19 +1,40 @@
 
 import { Webfuse } from "./webfuse/webfuse.js";
-import { StaticFileSystem } from "./static_filesystem.js";
+import { FileSystem } from "./filesystem.js";
+
+
+function encode(value) {
+    const encoder = new TextEncoder('utf-8');
+    return encoder.encode(value);
+}
+
+function get_contents() {
+    const contentTextArea = document.querySelector("#contents");
+    const contents = contentTextArea.value;
+    return encode(contents);
+}
+
+function get_token() {
+    const tokenTextfield = document.querySelector('#token');
+    const token = tokenTextfield.value;
+    return token;
+}
+
+function update_state(state) {
+    const stateTextField = document.querySelector("#state");
+    stateTextField.textContent = (state == "connected") ? "connected" : "disconnected";
+}
 
 let webfuse = null;
-const filesystem = new StaticFileSystem(new Map([
-    ["/foo", "foo"],
-    ["/bar", "foo"]
-]));
+const filesystem = new FileSystem(get_token, update_state, [
+    {name: "README.md", contents: get_contents }
+]);
 
 function onConnectButtonClicked() {
     if (webfuse) { webfuse.close(); }
 
     const urlTextfield = document.querySelector('#url');
     const url = urlTextfield.value;
-    console.log(url);
 
     webfuse = new Webfuse(url, filesystem);
 }