basis for undo (non functional)

index.html

@@ -61,9 +61,11 @@ recognizer.continuous = true;
 recognizer.lang = 'en-US';
 
 const aframeprimitives = getAllPrimitives()
-const speechactions = [ "add", "apply", "delete", "clone", "model" ]
+const speechactions = [ "add", "apply", "delete", "clone", "model", "undo" ]
 const speechcustomcomponents = [ "target", "teleporter" ]
 
+let speechCommands = []
+
 recognizer.onresult = (event) => {
    let result = event.results[event.resultIndex]
    if (result.isFinal) {
@@ -84,13 +86,16 @@ recognizer.onresult = (event) => {
 		el.setAttribute("position", "0 1.5 -0.4")
 		addedContent.push(el)
 		AFRAME.scenes[0].appendChild( el )
+		speechCommands.push( speechContent )
 	    break;
 	  case speechactions[1] :
 		console.log("recognized apply command")
 		latest.setAttribute( cmd_words[1], cmd_words[2]) // assuming fixed order for now
+		speechCommands.push( speechContent )
 	    break;
 	  case speechactions[2] :
 		deleteTarget( latest )
+		speechCommands.push( speechContent )
 	    break;
 	  case speechactions[3] :
 		el = latest.cloneNode(true) // does not work properly, losing some attributes, in particular scale can be problematic
@@ -106,9 +111,15 @@ recognizer.onresult = (event) => {
 		addedContent.push(el)
 		AFRAME.scenes[0].appendChild( el )
 		el.object3D.translateX(10) // due to scaling
+		speechCommands.push( speechContent )
 	    break;
 	  case speechactions[4] :
 		getModelFromKeyword( cmd_words[1] ) // requires the backend (proxy, LAN only for now, waiting for API clarification on 403)
+		speechCommands.push( speechContent )
+	    break;
+	  case speechactions[5] :
+		console.log( "should undo", speechCommands.at(-1) )
+			// note that not all commands might be undo-able
 	    break;
 	  default:
 		addedContent.push( addNewNoteAsPostItNote(speechContent, "0 1.2 -.5") )