separated code into extensions

lib/AsyncEmitter.js

@@ -0,0 +1,46 @@
+/* 
+ * async Event Emitter
+ *  
+ * // Example usage
+ * const emitter = new AsyncEmitter();
+ * 
+ * // Register some async listeners
+ * emitter.on("data", async (msg) => {
+ *   console.log("Listener 1 starting...");
+ *   await new Promise((r) => setTimeout(r, 1000));
+ *   console.log("Listener 1 done:", msg);
+ * });
+ * 
+ * emitter.on("data", async (msg) => {
+ *   console.log("Listener 2 starting...");
+ *   await new Promise((r) => setTimeout(r, 500));
+ *   console.log("Listener 2 done:", msg);
+ * });
+ * 
+ * (async () => {
+ *   console.log("Emitting...");
+ *   await emitter.emit("data", "Hello async world!");
+ *   console.log("All listeners finished.");
+ * })();
+ */ 
+
+class AsyncEmitter {
+  constructor() {
+    this.listeners = new Map();
+  }
+
+  on(event, listener) {
+    if (!this.listeners.has(event)) this.listeners.set(event, []);
+    this.listeners.get(event).push( listener );
+  }
+
+  async emit(event, ...args) {
+    const listeners = this.listeners.get(event) || [];
+    if( document.location.hostname == 'localhost' ) console.info(`emit(${event})`)
+    for (const fn of listeners) {
+      await fn(...args); // <-- Waits for each listener to finish
+    }
+  }
+}
+
+export {AsyncEmitter}

lib/widget.js

@@ -1,42 +1,21 @@
+import {AsyncEmitter} from "./AsyncEmitter.js"
 
 function widget(){
 
-  return new Proxy({
+  const me   = new AsyncEmitter()
+  me.player  = document.querySelector("#player"),
+  me.src     = document.location.search.substr(1),
+  me.ext     = {}
 
-    backend: null,
-    player:  document.querySelector("#player"),
-    src:     document.location.search.substr(1),
-    ext:     {},
+  return new Proxy( me, {
+    get(me,k){ return me[k] },
 
-    init(opts){ 
-      for( var i in opts) this[i] = opts[i]
-    },
-
-    play(){
-      // set URL
-      player.setAttribute("gltf-model", `url(${widget.src})` )
-
-      document.querySelector("#btn_play").style.display = 'none'
-
-      let script = document.createElement("script")
-      script.src = "https://aframe.io/releases/1.7.0/aframe.min.js"
-      document.head.appendChild(script)
-
-      script = document.createElement("script")
-      script.src = "backend.xrforge.js"
-      document.head.appendChild(script)
+    set(me,k,v){ 
+      me[k] = v
+      return true 
     }
 
-  },
-    {
-      get(me,k){ return me[k] },
-
-      set(me,k,v){ 
-        me[k] = v
-        return true 
-      }
-
-    })
+  })
 }
 
 export {widget}

lib/widget/play.js

@@ -0,0 +1,34 @@
+
+export default function extension(widget){
+
+  const ext = {
+
+    async init(){
+
+      // let other extensions set this.src if needed 
+      await widget.emit("init.play", this)
+
+      if( widget.src ){
+        document.querySelector('#scene').setAttribute("gltf-model",`url(${widget.src})`)
+      }
+
+      this.initButton()
+    },
+
+    initButton(){
+      const btn_play = document.querySelector("#btn_play")
+      btn_play.addEventListener("click", async () => {
+        btn_play.style.display = 'none' // hide button
+        widget.emit("play")
+      })
+    }
+
+  }
+
+  widget.ext.play = ext
+
+  // register async listeners
+  widget.on("init", ext.init.bind(ext) )
+    
+}
+

lib/widget/thumb.js

@@ -0,0 +1,26 @@
+
+export default function extension(widget){
+
+  const ext = {
+
+    src: "",
+
+    init: async () => {
+
+      // let other extensions set this.src if needed 
+      await widget.emit("init.thumb", widget.ext.thumb )
+
+      if( widget.ext.thumb.src ){
+        document.body.style.background = `url(${widget.ext.thumb.src}) no-repeat center / cover`
+      }
+    }
+
+  }
+
+  widget.ext.thumb = ext 
+
+  // register async listeners
+  widget.on("init", ext.init.bind(ext) )
+    
+}
+

lib/xrforge/index.js

@@ -1,24 +1,61 @@
-import {widget} from './../widget.js'
+import {widget as Widget} from './../widget.js'
 import {inferSource} from './util.js'
 
-const btn_play = document.querySelector("#btn_play")
-btn_play.addEventListener("click", () => {
-  btn_play.style.display = 'none' // hide button
-  import('aframe')
-})
+// extensions
+import {default as thumb} from './../widget/thumb.js'
+import {default as play}  from './../widget/play.js'
 
-let   src = document.location.search.substr(1)
-let cover = src
-const img = /\.(png|jpg|webp)/
+const widget = Widget()
+
+// init extensions
+thumb(widget)
+play(widget)
+
+// init xrforge extension
+widget.ext.xrforge = {
 
-// manyfold URLs need to be de-obfuscated
-if( src.match(img) ){
-  cover = await inferSource(src) 
-  src   = cover.replace(img,".glb")
 }
 
-console.dir({cover,src})
+// in case of Manyfold backend, a thumbnail is passed (not gltf src e.g.)
+// so we will infer the source-url based on the thumbnail 
+widget.on('init.thumb', async (thumb) => {
+  let   src = widget.src 
+  const img = /\.(png|jpg|webp)/
 
-document.querySelector('#scene').setAttribute("gltf-model",`url(${src})`)
-document.body.style.background = `url(${cover}) no-repeat center / cover`
+  if( src.match(img) ){
+    thumb.src = src 
+    let inferredSrc = await inferSource(src) 
+    widget.src   = inferredSrc.replace(img,".glb")
+  }
 
+})
+
+widget.on("play", async () => {
+  // initialize a specialized build of THREE/AFRAME
+  const AFRAME = await import('aframe')
+  window.THREE.DRACOLoader   = await import('three/examples/jsm/loaders/DRACOLoader.js')
+  window.THREE.FBXLoader     = await import('three/examples/jsm/loaders/FBXLoader.js')
+  window.THREE.USDZLoader    = await import('three/examples/jsm/loaders/USDZLoader.js')
+  window.THREE.ColladaLoader = await import('three/examples/jsm/loaders/ColladaLoader.js')
+  window.THREE.MTLLoader     = await import('three/examples/jsm/loaders/MTLLoader.js')
+  window.THREE.GLTFExporter  = await import('three/examples/jsm/exporters/GLTFExporter.js')
+  // optional utils
+  window.zipjs               = await import("@zip.js/zip.js")
+  window.webdav              = await import("webdav")
+  window.rs                  = await import("remotestoragejs")
+  window.trystero            = await import("trystero")
+
+  // include xrsh (remote for now, until the final integration is more clear)
+  const script = document.createElement("script")
+  script.src = "https://xrsh.isvery.ninja/xrsh.js"
+  script.addEventListener("load", function(){
+    const ent = document.createElement("a-entity")
+    ent.setAttribute("isoterminal","minimized:true")
+    ent.setAttribute("position","0 1.6 -0.3")
+    document.querySelector("a-scene").appendChild(ent)
+  })
+  document.body.appendChild(script)
+})
+
+await widget.emit("init")
+console.dir(widget)

package.json

@@ -10,7 +10,13 @@
   "license": "",
   "description": "",
   "dependencies": {
+    "@needle-tools/three-animation-pointer": "^1.0.7",
+    "@zip.js/zip.js": "^2.8.8",
     "aframe": "^1.7.1",
-    "xrf": "^0.0.1"
+    "remotestoragejs": "^2.0.0-beta.8",
+    "trystero": "^0.22.0",
+    "webdav": "^5.8.0",
+    "xrf": "^0.0.1",
+    "xrsh": "^0.0.5"
   }
 }

shell.nix

@@ -11,7 +11,6 @@
     # nativeBuildInputs is usually what you want -- tools you need to run
     nativeBuildInputs = with pkgs.buildPackages; [ 
 
-      nodejs_20
       monolith
       bun