local

public/webrtc.js

@@ -104,7 +104,7 @@ class Entropy {
    static local = null;
    
    static pageReady() {
-      Entropy.local = new Local("video");
+      Entropy.local = Local.build("video");
    }
    
    static start(isCaller) {
@@ -166,30 +166,37 @@ class Entropy {
 }
 
 class Local {
-   type = null;
    stream = null;
 
-   constructor(type) {
-      this.type = type;
-      switch (type) {
-         case "video":
-         case "audio":
+   static build(type) {
+      switch(type) {
+         case "audio":  return new Audio();
+         case "video":  return new Video();
+         case "text":   return new Text();
+         default:       View.error("unknown build", type);
+      }
+   }
+
+   constructor() {
       var constraints = {
-               video: type == "video",
-               audio: type == "audio",
+         video: this.gettype() == "video",
+         audio: this.gettype() == "audio",
       };
       if(!navigator.mediaDevices.getUserMedia) {
          View.error('Your browser does not support getUserMedia API');
       }
       navigator.mediaDevices.getUserMedia(constraints)
          .then((stream) => {
-                  if (type == "video") {
+            if (this.gettype() == "video") {
                new Preview('preview', stream);
             }
             this.stream = stream;
          })
          .catch(View.error);
    }
+
+   gettype() {
+      View.error("not impl");
    }
 
    start() {}
@@ -198,9 +205,15 @@ class Local {
 }
 
 class Audio extends Local {
+   gettype() {
+      return "audio";
+   }
 }
 
 class Video extends Local {
+   gettype() {
+      return "video";
+   }
 }
 
 class Text extends Local {