Add functionality for resetting new mentoring block.

problem_builder/mentoring.py

@@ -916,6 +916,19 @@ class MentoringWithExplicitStepsBlock(BaseMentoringBlock, StudioContainerWithNes
             'step': self.step
         }
 
+    @XBlock.json_handler
+    def try_again(self, data, suffix=''):
+        self.step = 0
+
+        step_blocks = [self.runtime.get_block(child_id) for child_id in self.steps]
+
+        for step in step_blocks:
+            step.reset()
+
+        return {
+            'result': 'success'
+        }
+
     def author_edit_view(self, context):
         """
         Add some HTML to the author view that allows authors to add child blocks.

problem_builder/public/js/mentoring_with_steps.js

@@ -4,7 +4,7 @@ function MentoringWithStepsBlock(runtime, element) {
         function(c) { return c.element.className.indexOf('pb-mentoring-step') > -1; }
     );
     var step = $('.mentoring', element).data('step');
-    var active_child, checkmark, submitDOM, nextDOM;
+    var active_child, checkmark, submitDOM, nextDOM, tryAgainDOM, submitXHR;
 
     function isLastChild() {
         return (active_child === steps.length-1);
@@ -15,7 +15,6 @@ function MentoringWithStepsBlock(runtime, element) {
         $.post(handlerUrl, JSON.stringify(step+1))
             .success(function(response) {
                 step = response.step;
-                console.log('Step: ' + step);
             });
     }
 
@@ -36,6 +35,11 @@ function MentoringWithStepsBlock(runtime, element) {
 
         nextDOM.removeAttr("disabled");
         if (nextDOM.is(':visible')) { nextDOM.focus(); }
+
+        if (isLastChild()) {
+            tryAgainDOM.removeAttr('disabled');
+            tryAgainDOM.show();
+        }
     }
 
     function submit() {
@@ -103,6 +107,27 @@ function MentoringWithStepsBlock(runtime, element) {
         }
     }
 
+    function handleTryAgain(result) {
+        if (result.result !== 'success')
+            return;
+
+        active_child = -1;
+        displayNextChild();
+        tryAgainDOM.hide();
+        submitDOM.show();
+        if (! isLastChild()) {
+            nextDOM.show();
+        }
+    }
+
+    function tryAgain() {
+        var handlerUrl = runtime.handlerUrl(element, 'try_again');
+        if (submitXHR) {
+            submitXHR.abort();
+        }
+        submitXHR = $.post(handlerUrl, JSON.stringify({})).success(handleTryAgain);
+    }
+
     function initXBlockView() {
         checkmark = $('.assessment-checkmark', element);
 
@@ -114,6 +139,9 @@ function MentoringWithStepsBlock(runtime, element) {
         nextDOM.bind('click', displayNextChild);
         nextDOM.show();
 
+        tryAgainDOM = $(element).find('.submit .input-try-again');
+        tryAgainDOM.bind('click', tryAgain);
+
         var options = {
             onChange: onChange
         };

problem_builder/step.py

@@ -146,6 +146,10 @@ class MentoringStepBlock(
             'results': submit_results,
         }
 
+    def reset(self):
+        while self.student_results:
+            self.student_results.pop()
+
     def author_edit_view(self, context):
         """
         Add some HTML to the author view that allows authors to add child blocks.

problem_builder/templates/html/mentoring_with_steps.html

@@ -13,6 +13,7 @@
       <span class="assessment-checkmark fa icon-2x"></span>
       <input type="button" class="input-main" value="Submit" disabled="disabled" />
       <input type="button" class="input-next" value="Next Step" disabled="disabled" />
+      <input type="button" class="input-try-again" value="Try again" disabled="disabled" />
     </div>
   </div>