Save burn progress speed in image writer state

build/browser/app.js

@@ -343,6 +343,11 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
   var self = this;
   var burning = false;
 
+  /*
+   * @summary Progress state
+   * @type Object
+   * @public
+   */
   this.state = {
 
     /**
@@ -350,7 +355,14 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
      * @type Number
      * @public
      */
-    progress: 0
+    progress: 0,
+
+    /**
+     * @summary Progress speed
+     * @type Number
+     * @public
+     */
+    speed: 0
 
   };
 
@@ -372,7 +384,11 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
     // Safely bring the state to the world of Angular
     $timeout(function() {
       self.state.progress = Math.floor(state.percentage);
-      console.debug('Progress: ' + self.state.progress);
+
+      // Transform bytes to megabytes preserving only two decimal places
+      self.state.speed = Math.floor(state.speed / 1e+6 * 100) / 100 || 0;
+
+      console.debug('Progress: ' + self.state.progress + ' at ' + self.state.speed + ' MB/s');
     });
 
   };
@@ -387,7 +403,8 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
    */
   this.reset = function() {
     self.setProgressState({
-      percentage: 0
+      percentage: 0,
+      speed: 0
     });
   };
 

lib/browser/modules/image-writer.js

@@ -35,6 +35,11 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
   var self = this;
   var burning = false;
 
+  /*
+   * @summary Progress state
+   * @type Object
+   * @public
+   */
   this.state = {
 
     /**
@@ -42,7 +47,14 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
      * @type Number
      * @public
      */
-    progress: 0
+    progress: 0,
+
+    /**
+     * @summary Progress speed
+     * @type Number
+     * @public
+     */
+    speed: 0
 
   };
 
@@ -64,7 +76,11 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
     // Safely bring the state to the world of Angular
     $timeout(function() {
       self.state.progress = Math.floor(state.percentage);
-      console.debug('Progress: ' + self.state.progress);
+
+      // Transform bytes to megabytes preserving only two decimal places
+      self.state.speed = Math.floor(state.speed / 1e+6 * 100) / 100 || 0;
+
+      console.debug('Progress: ' + self.state.progress + ' at ' + self.state.speed + ' MB/s');
     });
 
   };
@@ -79,7 +95,8 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
    */
   this.reset = function() {
     self.setProgressState({
-      percentage: 0
+      percentage: 0,
+      speed: 0
     });
   };
 

tests/browser/modules/image-writer.spec.js

@@ -26,6 +26,10 @@ describe('Browser: ImageWriter', function() {
       m.chai.expect(ImageWriterService.state.progress).to.equal(0);
     });
 
+    it('should set speed to zero by default', function() {
+      m.chai.expect(ImageWriterService.state.speed).to.equal(0);
+    });
+
     describe('.isBurning()', function() {
 
       it('should return false by default', function() {
@@ -65,11 +69,13 @@ describe('Browser: ImageWriter', function() {
 
       it('should be able to set the progress', function() {
         ImageWriterService.setProgressState({
-          percentage: 50
+          percentage: 50,
+          speed: 949624
         });
 
         $timeout.flush();
         m.chai.expect(ImageWriterService.state.progress).to.equal(50);
+        m.chai.expect(ImageWriterService.state.speed).to.equal(0.94);
       });
 
       it('should floor the percentage', function() {
@@ -81,13 +87,23 @@ describe('Browser: ImageWriter', function() {
         m.chai.expect(ImageWriterService.state.progress).to.equal(49);
       });
 
+      it('should assume speed zero if no speed', function() {
+        ImageWriterService.setProgressState({
+          percentage: 25
+        });
+
+        $timeout.flush();
+        m.chai.expect(ImageWriterService.state.speed).to.equal(0);
+      });
+
     });
 
     describe('.reset()', function() {
 
       it('should reset progress percentage to 0', function() {
         ImageWriterService.setProgressState({
-          percentage: 50
+          percentage: 50,
+          speed: 949624
         });
 
         $timeout.flush();
@@ -97,6 +113,19 @@ describe('Browser: ImageWriter', function() {
         m.chai.expect(ImageWriterService.state.progress).to.equal(0);
       });
 
+      it('should reset speed to 0', function() {
+        ImageWriterService.setProgressState({
+          percentage: 50,
+          speed: 949624
+        });
+
+        $timeout.flush();
+        m.chai.expect(ImageWriterService.state.speed).to.equal(0.94);
+        ImageWriterService.reset();
+        $timeout.flush();
+        m.chai.expect(ImageWriterService.state.speed).to.equal(0);
+      });
+
     });
 
     describe('.burn()', function() {