Merge pull request #917 from edx/ormsbee/check_flash_video_permissions

Check flash video permissions before enabling next step

lms/static/js/verify_student/CameraCapture.as

@@ -18,11 +18,13 @@ package
 	import flash.display.PNGEncoderOptions;
 	import flash.display.Sprite;
 	import flash.events.Event;
+	import flash.events.StatusEvent;
 	import flash.external.ExternalInterface;
 	import flash.geom.Rectangle;
 	import flash.media.Camera;
 	import flash.media.Video;
 	import flash.utils.ByteArray;
+	
 	import mx.utils.Base64Encoder;
 	
 	[SWF(width="640", height="480")]
@@ -35,15 +37,17 @@ package
 		private var camera:Camera;
 		private var video:Video;
 		private var b64EncodedImage:String = null;
+		private var permissionGiven:Boolean = false;
 		
 		public function CameraCapture()
 		{
-			addEventListener(Event.ADDED_TO_STAGE, init);
+			addEventListener(Event.ADDED_TO_STAGE, init); 
 		}
 		
 		protected function init(e:Event):void {
 			camera = Camera.getCamera();
 			camera.setMode(VIDEO_WIDTH, VIDEO_HEIGHT, 30);
+			camera.addEventListener(StatusEvent.STATUS, statusHandler);
 			
 			video = new Video(VIDEO_WIDTH, VIDEO_HEIGHT);
 			video.attachCamera(camera);
@@ -53,6 +57,7 @@ package
 			ExternalInterface.addCallback("snap", snap);
 			ExternalInterface.addCallback("reset", reset);
 			ExternalInterface.addCallback("imageDataUrl", imageDataUrl);
+			ExternalInterface.addCallback("cameraAuthorized", cameraAuthorized);
 			
 			// Notify the container that the SWF is ready to be called. 
 			ExternalInterface.call("setSWFIsReady"); 
@@ -98,6 +103,24 @@ package
 			}
 			return "";
 		}
+		
+		public function cameraAuthorized():Boolean {
+			return permissionGiven;
+		}
+		
+		public function statusHandler(event:StatusEvent):void {
+			switch (event.code) 
+			{ 
+				case "Camera.Muted": 
+					// User clicked Deny.
+					permissionGiven = false;
+					break; 
+				case "Camera.Unmuted": 
+					// "User clicked Accept.
+					permissionGiven = true;
+					break; 
+			} 			
+		}
 	}
 }
 

lms/static/js/verify_student/photocapture.js

@@ -124,7 +124,12 @@ function initSnapshotHandler(names, hasHtml5CameraSupport) {
       video[0].pause();
     }
     else {
-      image[0].src = flashCapture[0].snap();
+      if (flashCapture[0].cameraAuthorized()) {
+        image[0].src = flashCapture[0].snap();
+      }
+      else {
+        return false;
+      }
     }
 
     doSnapshotButton(captureButton, resetButton, approveButton);
@@ -186,7 +191,7 @@ function initSnapshotHandler(names, hasHtml5CameraSupport) {
 function objectTagForFlashCamera(name) {
   return '<object type="application/x-shockwave-flash" id="' +
          name + '" name="' + name + '" data=' +
-         '"/static/js/verify_student/CameraCapture.swf"' +
+         '"/static/js/verify_student/CameraCapture.swf?v=2"' +
           'width="500" height="375"><param name="quality" ' +
           'value="high"><param name="allowscriptaccess" ' +
           'value="sameDomain"></object>';